/* ============================================
   TECHSTUDIO - Main Stylesheet
   ============================================
   Tema Claro | Tema Escuro | Animações | Responsivo
   ============================================ */

/* ----- CSS Variables (Theme System) ----- */
:root {
  /* Light Theme (default) */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.7);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
  --text-inverse: #ffffff;
  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  --accent: #22C55E;
  --accent-hover: #16A34A;
  --accent-light: rgba(34, 197, 94, 0.1);
  --accent-glow: rgba(34, 197, 94, 0.3);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --header-bg: rgba(255, 255, 255, 0.85);
  --footer-bg: #0f172a;
  --footer-text: #cbd5e1;
  --gradient-accent: linear-gradient(135deg, #22C55E, #16A34A);
  --gradient-hero: linear-gradient(135deg, #f0fdf4 0%, #f8fafc 50%, #f0fdf4 100%);
  --code-bg: #f1f5f9;
  --skeleton: #e2e8f0;
  --loader-border: #e2e8f0;
  --toast-bg: #0f172a;
  --toast-text: #ffffff;
  --overlay: rgba(0, 0, 0, 0.5);
  --tag-bg: #f1f5f9;
  --input-bg: #ffffff;
  --input-border: #e2e8f0;
  --input-focus: #22C55E;
}

/* ----- Dark Theme ----- */
[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #1e293b;
  --bg-card: #1e293b;
  --bg-glass: rgba(15, 23, 42, 0.8);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-tertiary: #64748b;
  --text-inverse: #0f172a;
  --border-color: #334155;
  --border-light: #1e293b;
  --accent: #22C55E;
  --accent-hover: #4ade80;
  --accent-light: rgba(34, 197, 94, 0.15);
  --accent-glow: rgba(34, 197, 94, 0.4);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
  --header-bg: rgba(15, 23, 42, 0.9);
  --footer-bg: #020617;
  --footer-text: #94a3b8;
  --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
  --code-bg: #1e293b;
  --skeleton: #334155;
  --loader-border: #334155;
  --toast-bg: #ffffff;
  --toast-text: #0f172a;
  --overlay: rgba(0, 0, 0, 0.7);
  --tag-bg: #334155;
  --input-bg: #1e293b;
  --input-border: #334155;
  --input-focus: #22C55E;
}

/* ----- Reset & Base ----- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

ul { list-style: none; }

/* ----- Container ----- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ----- Typography ----- */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 16px;
  padding: 6px 14px;
  background: var(--accent-light);
  border-radius: var(--radius-full);
}

.section-label::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
}

.text-center {
  text-align: center;
}

.text-center .section-subtitle {
  margin: 0 auto;
}

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  text-decoration: none;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--gradient-accent);
  color: white;
  box-shadow: 0 4px 14px rgba(34, 197, 94, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(34, 197, 94, 0.45);
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1.5px solid var(--border-color);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  border-color: var(--accent);
  background: var(--accent-light);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent);
}

.btn-outline:hover {
  background: var(--accent);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(34, 197, 94, 0.3);
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
}

/* ----- Header ----- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all 0.3s ease;
  background: transparent;
}

.header.scrolled {
  background: var(--header-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 10px 0;
  box-shadow: var(--shadow-sm);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
}

.header-logo img {
  height: 80px;
  width: auto;
  margin: -22px 0;
  transition: opacity 0.3s ease;
}

.header-logo:hover img {
  opacity: 0.85;
}

.header-logo span {
  color: var(--accent);
}

/* Navigation */
.header-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.header-nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 0;
  transition: color 0.2s ease;
}

.header-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.header-nav a:hover {
  color: var(--text-primary);
}

.header-nav a:hover::after {
  width: 100%;
}

.header-nav a.active {
  color: var(--accent);
}

.header-nav a.active::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-full);
  background: var(--bg-glass);
  cursor: pointer;
  color: var(--text-primary);
  font-size: 1.1rem;
  transition: all 0.3s ease;
  backdrop-filter: blur(8px);
}

.theme-toggle:hover {
  border-color: var(--accent);
  background: var(--accent-light);
  color: var(--accent);
  transform: rotate(15deg);
}

/* Mobile Menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ----- Hero Section ----- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  background: var(--gradient-hero);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(34, 197, 94, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(34, 197, 94, 0.05) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 600px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--accent-light);
  border: 1px solid rgba(34, 197, 94, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s infinite;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  margin-bottom: 20px;
  letter-spacing: -0.03em;
  animation: fadeInUp 0.6s ease 0.1s both;
}

.hero h1 .highlight {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 520px;
  animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  animation: fadeInRight 0.8s ease 0.2s both;
}

.hero-illustration {
  width: 100%;
  max-width: 520px;
  position: relative;
}

.hero-code-window {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  width: 100%;
}

.hero-code-window .window-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
}

.hero-code-window .window-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.hero-code-window .window-dot:nth-child(1) { background: #ef4444; }
.hero-code-window .window-dot:nth-child(2) { background: #eab308; }
.hero-code-window .window-dot:nth-child(3) { background: #22C55E; }

.hero-code-window .window-title {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-left: 8px;
}

.hero-code-window .window-content {
  padding: 20px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--text-secondary);
  overflow-x: auto;
}

.hero-code-window .window-content .keyword { color: #c084fc; }
.hero-code-window .window-content .string { color: var(--accent); }
.hero-code-window .window-content .variable { color: #60a5fa; }
.hero-code-window .window-content .comment { color: var(--text-tertiary); font-style: italic; }

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  animation: fadeInUp 0.6s ease 0.4s both;
}

.hero-stat {
  text-align: left;
}

.hero-stat-number {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.hero-stat-label {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  margin-top: 4px;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-tertiary);
  font-size: 0.75rem;
  animation: bounce 2s infinite;
  cursor: pointer;
}

.hero-scroll-indicator svg {
  width: 24px;
  height: 24px;
}

/* ----- Sections Common ----- */
.section {
  padding: 100px 0;
}

.section-header {
  margin-bottom: 56px;
}

/* ----- About Section ----- */
.about {
  background: var(--bg-secondary);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-image {
  display: flex;
  justify-content: center;
}

.about-image svg {
  width: 100%;
  max-width: 400px;
  height: auto;
}

.about-text h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: 20px;
}

.about-text p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-mvv {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 32px;
}

.mvv-card {
  padding: 24px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.mvv-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.mvv-card .icon {
  font-size: 1.8rem;
  margin-bottom: 12px;
}

.mvv-card h4 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.mvv-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Team Section */
.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
  margin-top: 48px;
}

.team-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  text-align: center;
  transition: all 0.3s ease;
}

.team-card:hover {
  border-color: var(--accent);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.team-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  margin: 0 auto 20px;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: white;
  font-weight: 700;
}

.team-card h3 {
  font-size: 1.2rem;
  margin-bottom: 4px;
}

.team-card .role {
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 12px;
}

.team-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.team-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 16px;
}

.team-skills span {
  padding: 4px 12px;
  background: var(--accent-light);
  color: var(--accent);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
}

/* ----- Services Section ----- */
.services {
  background: var(--bg-primary);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: default;
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

.service-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  background: var(--accent-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--accent);
  transition: all 0.3s ease;
}

.service-card:hover .service-icon {
  background: var(--accent);
  color: white;
  transform: scale(1.1);
}

.service-card h3 {
  font-size: 1.05rem;
  margin-bottom: 10px;
}

.service-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ----- Portfolio Section ----- */
.portfolio {
  background: var(--bg-secondary);
}

.portfolio-filter {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.filter-btn {
  padding: 8px 20px;
  border: 1.5px solid var(--border-color);
  background: transparent;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  font-family: inherit;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.3s ease;
}

.filter-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.filter-btn.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.portfolio-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

.portfolio-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--accent);
}

.portfolio-card-image {
  height: 200px;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: rgba(255, 255, 255, 0.8);
  position: relative;
  overflow: hidden;
}

.portfolio-card-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 50%, rgba(0,0,0,0.3));
}

.portfolio-card-image .card-icon {
  position: relative;
  z-index: 1;
}

.portfolio-card-body {
  padding: 24px;
}

.portfolio-card-body .category {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-bottom: 8px;
}

.portfolio-card-body h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.portfolio-card-body p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.portfolio-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.portfolio-tags span {
  padding: 3px 10px;
  background: var(--tag-bg);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* ----- Process Section ----- */
.process {
  background: var(--bg-primary);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.process-grid::before {
  content: '';
  position: absolute;
  top: 60px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: var(--border-color);
  z-index: 0;
}

.process-step {
  text-align: center;
  position: relative;
  z-index: 1;
}

.process-step-number {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  background: var(--accent-light);
  border: 2px solid var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
  transition: all 0.3s ease;
}

.process-step:hover .process-step-number {
  background: var(--gradient-accent);
  color: white;
  transform: scale(1.1);
  box-shadow: 0 0 20px var(--accent-glow);
}

.process-step h4 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.process-step p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ----- Differentials Section ----- */
.differentials {
  background: var(--bg-secondary);
}

.diffs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.diff-card {
  padding: 28px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all 0.3s ease;
}

.diff-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

.diff-icon {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.diff-card h4 {
  font-size: 0.95rem;
  margin-bottom: 6px;
}

.diff-card p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ----- Stats Section ----- */
.stats {
  background: var(--gradient-accent);
  position: relative;
  overflow: hidden;
}

.stats::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.stats .container {
  position: relative;
  z-index: 1;
}

.stats h2 {
  color: white;
  margin-bottom: 8px;
}

.stats .section-subtitle {
  color: rgba(255, 255, 255, 0.8);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  margin-top: 48px;
}

.stat-item {
  text-align: center;
  color: white;
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.8);
  font-weight: 500;
}

/* ----- Testimonials Section ----- */
.testimonials {
  background: var(--bg-primary);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.3s ease;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

.testimonial-stars {
  color: #f59e0b;
  font-size: 1rem;
  margin-bottom: 16px;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 0.9rem;
}

.testimonial-author h4 {
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.testimonial-author span {
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

/* ----- FAQ Section ----- */
.faq {
  background: var(--bg-secondary);
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: var(--accent);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  color: var(--text-primary);
  text-align: left;
  transition: color 0.3s ease;
}

.faq-question:hover {
  color: var(--accent);
}

.faq-icon {
  width: 24px;
  height: 24px;
  min-width: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
  color: var(--text-tertiary);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--accent);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}

.faq-answer p {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 0.95rem;
}

/* ----- Blog Section ----- */
.blog-preview {
  background: var(--bg-primary);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.blog-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--accent);
}

.blog-card-image {
  height: 180px;
  background: var(--gradient-hero);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--text-tertiary);
}

.blog-card-body {
  padding: 24px;
}

.blog-card-meta {
  display: flex;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-bottom: 12px;
}

.blog-card-meta .category {
  color: var(--accent);
  font-weight: 600;
}

.blog-card-body h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  line-height: 1.4;
}

.blog-card-body h3 a {
  color: var(--text-primary);
  transition: color 0.2s ease;
}

.blog-card-body h3 a:hover {
  color: var(--accent);
}

.blog-card-body p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.blog-card-body .read-more {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s ease;
}

.blog-card-body .read-more:hover {
  gap: 8px;
}

/* ----- Contact Section ----- */
.contact {
  background: var(--bg-secondary);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-info-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact-info-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  background: var(--accent-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--accent);
}

.contact-info-item h4 {
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.contact-info-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Contact Form */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--input-bg);
  border: 1.5px solid var(--input-border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text-primary);
  transition: all 0.3s ease;
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--input-focus);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* ----- Technologies Section ----- */
.technologies {
  background: var(--bg-primary);
}

.tech-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

.tech-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all 0.3s ease;
  font-size: 0.9rem;
  font-weight: 500;
}

.tech-item:hover {
  border-color: var(--accent);
  background: var(--accent-light);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.tech-item .tech-icon {
  font-size: 1.3rem;
}

/* ----- Footer ----- */
.footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 80px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand h3 {
  color: white;
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 320px;
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--footer-text);
  transition: all 0.3s ease;
  font-size: 0.9rem;
}

.footer-social a:hover {
  background: var(--accent);
  color: white;
  transform: translateY(-3px);
}

.footer h4 {
  color: white;
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-links a {
  display: block;
  padding: 6px 0;
  font-size: 0.88rem;
  color: var(--footer-text);
  transition: all 0.2s ease;
}

.footer-links a:hover {
  color: var(--accent);
  padding-left: 4px;
}

.footer-bottom {
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

.footer-bottom-links {
  display: flex;
  gap: 20px;
}

.footer-bottom-links a {
  color: var(--footer-text);
  transition: color 0.2s ease;
}

.footer-bottom-links a:hover {
  color: white;
}

/* ----- WhatsApp Button ----- */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  background: #25d366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.4);
  z-index: 999;
  transition: all 0.3s ease;
  cursor: pointer;
  text-decoration: none;
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 30px rgba(37, 211, 102, 0.5);
}

/* ----- Language Selector ----- */
.lang-selector {
  position: relative;
  display: flex;
  align-items: center;
}

.lang-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-full);
  background: var(--bg-glass);
  cursor: pointer;
  color: var(--text-primary);
  font-size: 0.75rem;
  font-weight: 700;
  transition: all 0.3s ease;
  backdrop-filter: blur(8px);
  letter-spacing: 0.03em;
}

.lang-toggle:hover {
  border-color: var(--accent);
  background: var(--accent-light);
  color: var(--accent);
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 160px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 100;
  overflow: hidden;
}

.lang-selector:hover .lang-dropdown,
.lang-selector:focus-within .lang-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.2s ease;
  text-decoration: none;
  border-bottom: 1px solid var(--border-light);
}

.lang-option:last-child {
  border-bottom: none;
}

.lang-option:hover {
  background: var(--accent-light);
  color: var(--accent);
}

.lang-option.active {
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 600;
}

.lang-flag {
  font-size: 1.2rem;
  line-height: 1;
}

.lang-current {
  line-height: 1;
}

/* Mobile language selector in nav */
.header-nav .lang-selector {
  display: none;
}

@media (max-width: 768px) {
  .header-actions .lang-selector {
    display: none;
  }

  .header-nav .lang-selector {
    display: block;
    width: 100%;
    margin-top: 8px;
  }

  .header-nav .lang-toggle {
    width: 100%;
    justify-content: space-between;
    padding: 12px 18px;
    font-size: 0.9rem;
    border-radius: var(--radius-md);
  }

  .header-nav .lang-dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: 1px solid var(--border-color);
    margin-top: 4px;
  }

  .header-nav .lang-selector:hover .lang-dropdown,
  .header-nav .lang-selector:focus-within .lang-dropdown {
    display: block;
  }
}

/* ----- Back to Top ----- */
.back-to-top {
  position: fixed;
  bottom: 24px;
  left: 24px;
  width: 44px;
  height: 44px;
  background: var(--bg-card);
  border: 1.5px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
  cursor: pointer;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s ease;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-4px);
}

/* ----- Newsletter ----- */
.newsletter {
  padding: 60px 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.newsletter-box {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.newsletter-box h3 {
  font-size: 1.4rem;
  margin-bottom: 8px;
}

.newsletter-box p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.newsletter-form {
  display: flex;
  gap: 12px;
  max-width: 480px;
  margin: 0 auto;
}

.newsletter-form input {
  flex: 1;
  padding: 12px 18px;
  background: var(--input-bg);
  border: 1.5px solid var(--input-border);
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.3s ease;
}

.newsletter-form input:focus {
  border-color: var(--accent);
}

/* ----- Cookies Banner ----- */
.cookies-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  padding: 16px 24px;
  z-index: 998;
  display: none;
  box-shadow: 0 -4px 20px rgba(0,0,0,0.08);
}

.cookies-banner.show {
  display: block;
}

.cookies-banner .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.cookies-banner p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.cookies-banner .btn {
  white-space: nowrap;
}

/* ----- Breadcrumb ----- */
.breadcrumb {
  padding: 20px 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

.breadcrumb-list a {
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.breadcrumb-list a:hover {
  color: var(--accent);
}

.breadcrumb-list .separator {
  color: var(--text-tertiary);
}

.breadcrumb-list .current {
  color: var(--text-primary);
  font-weight: 500;
}

/* ----- Page Header ----- */
.page-header {
  padding: 140px 0 60px;
  background: var(--gradient-hero);
  text-align: center;
}

.page-header h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 12px;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ----- Blog Pages ----- */
.blog-page-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
  padding: 60px 0;
}

.blog-page-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.blog-page-card {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
}

.blog-page-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}

.blog-page-card .card-image {
  height: 100%;
  min-height: 180px;
  background: var(--gradient-hero);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--text-tertiary);
}

.blog-page-card .card-body {
  padding: 24px 24px 24px 0;
}

.blog-page-card .card-meta {
  display: flex;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-bottom: 8px;
}

.blog-page-card h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.blog-page-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Sidebar */
.blog-sidebar {
  position: sticky;
  top: 100px;
}

.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

.sidebar-widget h3 {
  font-size: 1.1rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-search {
  display: flex;
  gap: 8px;
}

.sidebar-search input {
  flex: 1;
  padding: 10px 14px;
  background: var(--input-bg);
  border: 1.5px solid var(--input-border);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--text-primary);
  outline: none;
}

.sidebar-search input:focus {
  border-color: var(--accent);
}

.sidebar-categories a {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-light);
  transition: color 0.2s ease;
}

.sidebar-categories a:last-child {
  border-bottom: none;
}

.sidebar-categories a:hover {
  color: var(--accent);
}

/* Blog Post */
.blog-post {
  padding: 60px 0;
}

.blog-post-content {
  max-width: 750px;
  margin: 0 auto;
}

.blog-post-header {
  margin-bottom: 32px;
}

.blog-post-header .post-meta {
  display: flex;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-tertiary);
  margin-bottom: 12px;
}

.blog-post-header .post-category {
  color: var(--accent);
  font-weight: 600;
}

.blog-post-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
}

.blog-post-body {
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--text-secondary);
}

.blog-post-body h2 {
  font-size: 1.5rem;
  color: var(--text-primary);
  margin: 32px 0 16px;
}

.blog-post-body h3 {
  font-size: 1.2rem;
  color: var(--text-primary);
  margin: 24px 0 12px;
}

.blog-post-body p {
  margin-bottom: 16px;
}

.blog-post-body ul,
.blog-post-body ol {
  margin: 16px 0;
  padding-left: 24px;
}

.blog-post-body li {
  margin-bottom: 8px;
}

.blog-post-body ul li {
  list-style: disc;
}

.blog-post-body ol li {
  list-style: decimal;
}

.blog-post-body strong {
  color: var(--text-primary);
}

.blog-post-body img {
  border-radius: var(--radius-lg);
  margin: 24px 0;
}

.blog-post-image {
  width: 100%;
  height: 300px;
  background: var(--gradient-hero);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--text-tertiary);
  margin-bottom: 32px;
}

/* ----- Pagination ----- */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 48px;
}

.pagination a {
  padding: 10px 18px;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.3s ease;
}

.pagination a:hover,
.pagination a.active {
  border-color: var(--accent);
  background: var(--accent);
  color: white;
}

/* ----- 404 Page ----- */
.page-404 {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 140px 24px 60px;
}

.page-404 h1 {
  font-size: clamp(5rem, 10vw, 8rem);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 16px;
}

.page-404 h2 {
  font-size: 1.8rem;
  margin-bottom: 12px;
}

.page-404 p {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

/* ----- Toast Messages ----- */
.toast-container {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  background: var(--toast-bg);
  color: var(--toast-text);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.9rem;
  min-width: 300px;
  max-width: 450px;
  animation: slideInRight 0.4s ease;
}

.toast.success { border-left: 4px solid #22C55E; }
.toast.error { border-left: 4px solid #ef4444; }
.toast.info { border-left: 4px solid #3b82f6; }

.toast-close {
  margin-left: auto;
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  opacity: 0.6;
  transition: opacity 0.2s ease;
  font-size: 1.1rem;
}

.toast-close:hover {
  opacity: 1;
}

/* ----- Loader / Skeleton ----- */
.page-loader {
  position: fixed;
  inset: 0;
  z-index: 99999;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.page-loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--loader-border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ============================================
   PORTFOLIO MODAL
   ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  backdrop-filter: blur(4px);
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 680px;
  max-height: 85vh;
  overflow-y: auto;
  position: relative;
  box-shadow: var(--shadow-xl);
  transform: scale(0.9) translateY(20px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay.open .modal-content {
  transform: scale(1) translateY(0);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1.5px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 1.3rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  z-index: 1;
}

.modal-close:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: rotate(90deg);
}

.modal-body {
  padding: 40px;
}

.modal-project-header {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.modal-project-icon {
  width: 64px;
  height: 64px;
  min-width: 64px;
  background: var(--accent-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.modal-project-category {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-bottom: 6px;
  padding: 3px 10px;
  background: var(--accent-light);
  border-radius: var(--radius-full);
}

.modal-project-header h2 {
  font-size: 1.4rem;
  line-height: 1.3;
}

.modal-project-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: 20px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
}

.modal-project-meta-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.modal-project-meta-item strong {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  font-weight: 600;
}

.modal-project-meta-item span {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 500;
}

.modal-project-description {
  margin-bottom: 24px;
}

.modal-project-description p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
  font-size: 0.95rem;
}

.modal-project-description ul,
.modal-project-description ol {
  margin: 12px 0;
  padding-left: 24px;
}

.modal-project-description ul li {
  list-style: disc;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 6px;
  font-size: 0.92rem;
}

.modal-project-description ol li {
  list-style: decimal;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 6px;
  font-size: 0.92rem;
}

.modal-project-description strong {
  color: var(--text-primary);
}

.modal-project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.modal-project-tags span {
  padding: 4px 12px;
  background: var(--tag-bg);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Modal Scrollbar */
.modal-content::-webkit-scrollbar {
  width: 6px;
}

.modal-content::-webkit-scrollbar-track {
  background: transparent;
}

.modal-content::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

.modal-content::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

@media (max-width: 768px) {
  .modal-overlay {
    padding: 16px;
    align-items: flex-end;
  }
  .modal-content {
    max-height: 90vh;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  }
  .modal-body {
    padding: 28px 24px;
  }
  .modal-project-header {
    flex-direction: column;
  }
  .modal-project-meta {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   MEMBER PROFILE PAGE
   ============================================ */
.member-profile {
  padding: 140px 0 60px;
  background: var(--gradient-hero);
}

.member-profile-header {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 48px;
  align-items: center;
}

.member-avatar-large {
  width: 160px;
  height: 160px;
  min-width: 160px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  font-weight: 700;
  color: white;
  box-shadow: 0 0 0 4px var(--bg-card), 0 0 0 6px var(--accent);
}

.member-profile-info h1 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  margin-bottom: 8px;
}

.member-role {
  font-size: 1.1rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 16px;
}

.member-bio-text {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
  max-width: 600px;
}

.member-profile-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-github {
  background: #24292e;
  color: white;
  box-shadow: 0 4px 14px rgba(36, 41, 46, 0.35);
  border: none;
  font-size: 1.05rem;
  padding: 14px 36px;
}

.btn-github:hover {
  background: #1b1f23;
  color: white;
  box-shadow: 0 6px 20px rgba(36, 41, 46, 0.5);
  transform: translateY(-2px);
}

/* Member Details Section */
.member-details {
  padding-top: 0;
}

.member-details-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 48px;
}

.member-details-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.member-details-card h3 {
  font-size: 1.1rem;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.member-details-card h3 i {
  color: var(--accent);
  font-size: 1.2rem;
}

.member-skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.skill-tag {
  padding: 8px 18px;
  background: var(--accent-light);
  color: var(--accent);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.member-social-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.member-social-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-weight: 500;
  transition: all 0.3s ease;
}

.member-social-link:hover {
  border-color: var(--accent);
  background: var(--accent-light);
  color: var(--accent);
  transform: translateX(4px);
}

.member-social-link i {
  font-size: 1.3rem;
}

/* Member Section */
.member-section {
  margin-bottom: 48px;
}

.member-section-title {
  font-size: 1.4rem;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.member-section-title i {
  color: var(--accent);
}

/* Timeline */
.member-timeline {
  position: relative;
  padding-left: 32px;
}

.member-timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--border-color);
}

.timeline-item {
  position: relative;
  margin-bottom: 32px;
}

.timeline-dot {
  position: absolute;
  left: -28px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 0 2px var(--accent);
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all 0.3s ease;
}

.timeline-content:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}

.timeline-period {
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.timeline-content h3 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.timeline-content h4 {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 8px;
}

.timeline-content p {
  font-size: 0.9rem;
  color: var(--text-tertiary);
  line-height: 1.6;
}

/* Courses Grid */
.member-courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.course-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all 0.3s ease;
}

.course-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.course-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  background: var(--accent-light);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.1rem;
}

.course-info h4 {
  font-size: 0.95rem;
  margin-bottom: 4px;
  line-height: 1.3;
}

.course-institution {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 2px;
}

.course-year {
  font-size: 0.78rem;
  color: var(--text-tertiary);
  font-weight: 500;
}

/* Team Card Link */
.team-card-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.team-card-link:hover {
  color: inherit;
}

/* Member Profile Responsive */
@media (max-width: 768px) {
  .member-profile-header {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 24px;
  }
  .member-avatar-large {
    margin: 0 auto;
    width: 120px;
    height: 120px;
    min-width: 120px;
    font-size: 3rem;
  }
  .member-bio-text {
    max-width: 100%;
  }
  .member-profile-actions {
    justify-content: center;
  }
  .member-details-grid {
    grid-template-columns: 1fr;
  }
  .member-courses-grid {
    grid-template-columns: 1fr;
  }
  .member-timeline {
    padding-left: 24px;
  }
  .timeline-dot {
    left: -20px;
    width: 12px;
    height: 12px;
  }
}

/* ----- Animations ----- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Scroll Reveal Classes */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: all 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: all 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* Delay helpers */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* ----- Responsive: Tablet ----- */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(3, 1fr); }
  .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid::before { display: none; }
  .diffs-grid { grid-template-columns: repeat(3, 1fr); }
  .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
  .blog-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .blog-page-grid { grid-template-columns: 1fr; }
  .blog-page-card { grid-template-columns: 1fr; }
  .blog-page-card .card-body { padding: 0 24px 24px; }
  .blog-page-card .card-image { min-height: 200px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
}

/* ----- Responsive: Mobile ----- */
@media (max-width: 768px) {
  .container { padding: 0 20px; }

  /* Header */
  .header-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 75%;
    max-width: 340px;
    height: 100vh;
    background: var(--bg-card);
    flex-direction: column;
    align-items: flex-start;
    padding: 100px 32px 40px;
    gap: 8px;
    box-shadow: -4px 0 20px rgba(0,0,0,0.1);
    transition: right 0.3s ease;
  }

  .header-nav.open {
    right: 0;
  }

  .header-nav a {
    font-size: 1.05rem;
    padding: 12px 0;
    width: 100%;
    border-bottom: 1px solid var(--border-light);
  }

  .header-nav .header-actions {
    display: flex;
    width: 100%;
    margin-top: 16px;
  }

  .header-nav .header-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .menu-toggle {
    display: flex;
  }

  .header-actions {
    display: none;
  }

  /* Mobile Overlay */
  .mobile-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }

  .mobile-overlay.open {
    opacity: 1;
    visibility: visible;
  }

  /* Hero */
  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-content { max-width: 100%; }
  .hero p { margin: 0 auto 36px; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-visual { display: none; }

  /* Sections */
  .section { padding: 60px 0; }
  .section-header { margin-bottom: 36px; }

  /* About */
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-mvv { grid-template-columns: 1fr; }

  /* Services */
  .services-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }

  /* Portfolio */
  .portfolio-grid { grid-template-columns: 1fr; }

  /* Process */
  .process-grid { grid-template-columns: 1fr 1fr; gap: 32px; }

  /* Differentials */
  .diffs-grid { grid-template-columns: repeat(2, 1fr); }

  /* Team */
  .team-grid { grid-template-columns: 1fr; }

  /* Testimonials */
  .testimonials-grid { grid-template-columns: 1fr; }

  /* Blog */
  .blog-grid { grid-template-columns: 1fr; }

  /* Contact */
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .form-row { grid-template-columns: 1fr; }

  /* Footer */
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }

  /* Newsletter */
  .newsletter-form { flex-direction: column; }

  /* Cookies */
  .cookies-banner .container { flex-direction: column; text-align: center; }

  /* Stats */
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .stat-number { font-size: 2.2rem; }

  /* Blog Post */
  .blog-post-header .post-meta { flex-wrap: wrap; }

  /* Back to Top + WhatsApp */
  .whatsapp-float { width: 48px; height: 48px; font-size: 1.3rem; bottom: 20px; right: 20px; }
  .back-to-top { width: 38px; height: 38px; font-size: 0.9rem; bottom: 20px; left: 20px; }
}

/* ----- Responsive: Small Mobile ----- */
@media (max-width: 480px) {
  .services-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .diffs-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.8rem; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-stats { gap: 24px; }
  .toast { min-width: auto; max-width: calc(100vw - 48px); }
}