/* ========================================
   CSS VARIABLES & DESIGN TOKENS
   ======================================== */
:root {
  /* Colors */
  --color-primary: #E63946;
  --color-primary-dark: #C62833;
  --color-primary-light: #FF6B6B;
  --color-primary-glow: rgba(230, 57, 70, 0.15);
  --color-primary-subtle: rgba(230, 57, 70, 0.06);

  --color-bg: #FFFFFF;
  --color-bg-subtle: #F8F9FA;
  --color-bg-section: #FAFBFC;
  --color-bg-card: rgba(255, 255, 255, 0.7);
  --color-bg-glass: rgba(255, 255, 255, 0.55);

  --color-text: #1A1A2E;
  --color-text-secondary: #4A4A68;
  --color-text-muted: #8A8AA3;
  --color-text-light: #B0B0C8;

  --color-border: rgba(0, 0, 0, 0.06);
  --color-border-strong: rgba(0, 0, 0, 0.1);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --text-7xl: 4.5rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Sizes */
  --max-width: 1200px;
  --max-width-narrow: 800px;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 40px rgba(230, 57, 70, 0.15);
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 16px rgba(0, 0, 0, 0.04);
  --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.08);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Blur */
  --blur-sm: 8px;
  --blur-md: 16px;
  --blur-lg: 24px;
}

/* ========================================
   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;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
}

ul, ol {
  list-style: none;
}

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}

/* ========================================
   UTILITY CLASSES
   ======================================== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-24) 0;
}

.section-alt {
  background-color: var(--color-bg-section);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary-subtle);
  border-radius: var(--radius-full);
  border: 1px solid rgba(230, 57, 70, 0.1);
}

.section-title {
  font-size: var(--text-4xl);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 640px;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-header .section-subtitle {
  margin: 0 auto;
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-size: var(--text-base);
  font-weight: 600;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white;
  box-shadow: 0 4px 16px rgba(230, 57, 70, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(230, 57, 70, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--color-bg);
  color: var(--color-text);
  border: 1.5px solid var(--color-border-strong);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-subtle);
}

.btn-lg {
  padding: var(--space-5) var(--space-10);
  font-size: var(--text-lg);
  border-radius: var(--radius-xl);
}

.btn-icon {
  font-size: var(--text-xl);
  transition: transform var(--transition-fast);
}

.btn:hover .btn-icon {
  transform: translateX(3px);
}

/* ========================================
   GLASS CARD
   ======================================== */
.glass-card {
  background: var(--color-bg-glass);
  backdrop-filter: blur(var(--blur-md));
  -webkit-backdrop-filter: blur(var(--blur-md));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  transition: all var(--transition-base);
}

.glass-card:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-border-strong);
  transform: translateY(-2px);
}

/* ========================================
   NAVBAR
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(var(--blur-lg));
  -webkit-backdrop-filter: blur(var(--blur-lg));
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.navbar-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--text-lg);
  font-weight: 700;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.navbar-nav a {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.navbar-nav a:hover {
  color: var(--color-text);
  background: var(--color-bg-section);
}

.navbar-cta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.navbar-cta .btn {
  padding: var(--space-2) var(--space-6);
  font-size: var(--text-sm);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(var(--blur-lg));
  -webkit-backdrop-filter: blur(var(--blur-lg));
  z-index: 999;
  padding: var(--space-8) var(--space-6);
  flex-direction: column;
  gap: var(--space-2);
}

.mobile-nav.active {
  display: flex;
}

.mobile-nav a {
  padding: var(--space-4);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.mobile-nav a:hover {
  background: var(--color-bg-section);
  color: var(--color-text);
}

.mobile-nav .btn {
  margin-top: var(--space-4);
  text-align: center;
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
  position: relative;
  padding: calc(72px + var(--space-20)) 0 var(--space-20);
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(230, 57, 70, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(230, 57, 70, 0.04) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary-subtle);
  border: 1px solid rgba(230, 57, 70, 0.12);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-8);
}

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

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero-title {
  font-size: var(--text-6xl);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.04em;
  margin-bottom: var(--space-6);
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-8);
  max-width: 520px;
}

.hero-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}

.tech-tag {
  padding: var(--space-1) var(--space-3);
  background: var(--color-bg-section);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--color-text-secondary);
}

.hero-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-10);
}

.hero-feature {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.hero-feature .check {
  width: 20px;
  height: 20px;
  background: var(--color-primary-subtle);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 11px;
  flex-shrink: 0;
}

.hero-cta {
  display: flex;
  gap: var(--space-4);
  align-items: center;
  flex-wrap: wrap;
}

.hero-meta {
  display: flex;
  gap: var(--space-8);
  margin-top: var(--space-10);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.hero-meta-item {
  display: flex;
  flex-direction: column;
}

.hero-meta-value {
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero-meta-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Hero Visual */
.hero-visual {
  position: relative;
  z-index: 1;
  padding: 28px 28px 28px 28px;
}

.hero-card-main {
  background: linear-gradient(145deg, #1a1a2e, #16162a);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-xl);
  position: relative;
}

.hero-card-main::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
}

.code-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

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

.code-dot.red { background: #FF5F57; }
.code-dot.yellow { background: #FEBC2E; }
.code-dot.green { background: #28C840; }

.code-filename {
  margin-left: auto;
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.3);
  font-family: var(--font-mono);
}

.code-content {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.7);
}

.code-content .keyword { color: #C678DD; }
.code-content .function { color: #61AFEF; }
.code-content .string { color: #98C379; }
.code-content .comment { color: rgba(255, 255, 255, 0.25); }
.code-content .number { color: #D19A66; }
.code-content .tag { color: #E06C75; }
.code-content .attr { color: #D19A66; }

.hero-floating-card {
  position: absolute;
  background: var(--color-bg-glass);
  backdrop-filter: blur(var(--blur-md));
  -webkit-backdrop-filter: blur(var(--blur-md));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-lg);
}

.floating-card-1 {
  top: 0;
  right: 0;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  animation: float 6s ease-in-out infinite;
}

.floating-card-2 {
  bottom: 0;
  left: 0;
  animation: float 6s ease-in-out infinite 2s;
}

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

.float-icon {
  width: 40px;
  height: 40px;
  background: var(--color-primary-subtle);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xl);
}

.float-text strong {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
}

.float-text span {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ========================================
   TECHNOLOGIES SECTION
   ======================================== */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-4);
}

.tech-card {
  text-align: center;
  padding: var(--space-8) var(--space-4);
  border-radius: var(--radius-xl);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.tech-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

.tech-card:hover::before {
  opacity: 1;
}

.tech-card-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-4);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
  font-weight: 700;
  font-family: var(--font-mono);
}

.tech-card-icon.html { background: #FFF0ED; color: #E44D26; }
.tech-card-icon.css { background: #EDF4FF; color: #1572B6; }
.tech-card-icon.js { background: #FFFBEB; color: #F7DF1E; }
.tech-card-icon.python { background: #EEF6FF; color: #3776AB; }
.tech-card-icon.php { background: #F0EEF8; color: #777BB4; }
.tech-card-icon.mysql { background: #EEF7FA; color: #4479A1; }
.tech-card-icon.git { background: #FFF2EE; color: #F05032; }

.tech-card-name {
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.tech-card-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ========================================
   ABOUT SECTION
   ======================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.about-visual {
  position: relative;
}

.about-journey {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  position: relative;
}

.about-journey::before {
  content: '';
  position: absolute;
  left: 24px;
  top: 48px;
  bottom: 48px;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-primary-light), var(--color-border));
}

.journey-step {
  display: flex;
  gap: var(--space-5);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.journey-step:hover {
  background: var(--color-bg-section);
}

.journey-number {
  width: 48px;
  height: 48px;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: 800;
  color: var(--color-text-muted);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  transition: all var(--transition-base);
}

.journey-step:hover .journey-number {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-subtle);
}

.journey-text h4 {
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.journey-text p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.about-content .section-title {
  margin-bottom: var(--space-6);
}

.about-content p {
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-4);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.about-stat {
  text-align: center;
  padding: var(--space-5);
  background: var(--color-bg-section);
  border-radius: var(--radius-lg);
}

.about-stat-value {
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.about-stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* ========================================
   SKILLS SECTION
   ======================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-5);
}

.skill-card {
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  position: relative;
}

.skill-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(230, 57, 70, 0.2);
}

.skill-icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary-subtle);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xl);
  margin-bottom: var(--space-5);
}

.skill-card h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.skill-card p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ========================================
   METHODOLOGY SECTION
   ======================================== */
.method-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}

.method-card {
  text-align: center;
  padding: var(--space-10) var(--space-6);
  border-radius: var(--radius-xl);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.method-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.method-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.method-card:hover::after {
  transform: scaleX(1);
}

.method-number {
  font-size: var(--text-5xl);
  font-weight: 800;
  color: var(--color-primary);
  opacity: 0.15;
  line-height: 1;
  margin-bottom: var(--space-4);
}

.method-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-5);
  background: var(--color-primary-subtle);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
}

.method-card h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.method-card p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.method-freq {
  display: inline-block;
  margin-top: var(--space-3);
  padding: var(--space-1) var(--space-3);
  background: var(--color-primary-subtle);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
}

/* ========================================
   MODULES SECTION
   ======================================== */
.modules-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.module-card {
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.module-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(230, 57, 70, 0.15);
}

.module-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.module-badge {
  padding: var(--space-1) var(--space-3);
  background: var(--color-primary-subtle);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-primary);
  font-family: var(--font-mono);
}

.module-duration {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-left: auto;
}

.module-card h3 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.module-card > p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-5);
}

.module-topics {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.module-topic {
  padding: var(--space-1) var(--space-3);
  background: var(--color-bg-section);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-secondary);
}

/* ========================================
   CURRICULUM ACCORDION
   ======================================== */
.curriculum-container {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
}

.accordion-group {
  margin-bottom: var(--space-3);
}

.accordion-group-title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.accordion-group-title .group-badge {
  padding: var(--space-1) var(--space-3);
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 700;
}

.accordion-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2);
  overflow: hidden;
  transition: all var(--transition-base);
}

.accordion-item:hover {
  border-color: var(--color-border-strong);
}

.accordion-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-bg);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
}

.accordion-header:hover {
  background: var(--color-bg-section);
}

.accordion-header .week-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  font-weight: 700;
  min-width: 72px;
}

.accordion-header .arrow {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.accordion-item.active .accordion-header .arrow {
  transform: rotate(180deg);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.accordion-body-inner {
  padding: 0 var(--space-5) var(--space-5);
}

.accordion-body-inner ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.accordion-body-inner li {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  padding-left: var(--space-5);
  position: relative;
}

.accordion-body-inner li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
  opacity: 0.5;
}

/* ========================================
   FINAL PROJECT SECTION
   ======================================== */
.project-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.project-content .section-title {
  margin-bottom: var(--space-6);
}

.project-content > p {
  font-size: var(--text-lg);
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}

.project-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.project-feature {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-bg-section);
  transition: all var(--transition-fast);
}

.project-feature:hover {
  background: var(--color-primary-subtle);
}

.project-feature-icon {
  width: 40px;
  height: 40px;
  background: var(--color-primary-subtle);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-lg);
  flex-shrink: 0;
}

.project-feature-text strong {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
}

.project-feature-text span {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.project-visual {
  position: relative;
}

.project-mockup {
  background: linear-gradient(145deg, #1a1a2e, #16162a);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-xl);
}

.mockup-browser-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.mockup-url {
  flex: 1;
  margin-left: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.3);
  font-family: var(--font-mono);
}

.mockup-content {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: var(--space-4);
  min-height: 260px;
}

.mockup-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.mockup-sidebar-item {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.4);
  transition: all var(--transition-fast);
}

.mockup-sidebar-item.active {
  background: rgba(230, 57, 70, 0.15);
  color: var(--color-primary-light);
}

.mockup-main {
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
  padding: var(--space-5);
}

.mockup-main h4 {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--space-4);
}

.mockup-table {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.mockup-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.4);
}

.mockup-status {
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 10px;
  font-weight: 600;
}

.mockup-status.active { background: rgba(40, 200, 64, 0.15); color: #28C840; }
.mockup-status.pending { background: rgba(254, 188, 46, 0.15); color: #FEBC2E; }

/* ========================================
   CTA SECTION
   ======================================== */
.cta-section {
  padding: var(--space-24) 0;
  position: relative;
  overflow: hidden;
}

.cta-inner {
  text-align: center;
  padding: var(--space-20) var(--space-8);
  background: linear-gradient(145deg, #1a1a2e, #16162a);
  border-radius: var(--radius-2xl);
  position: relative;
  overflow: hidden;
}

.cta-inner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(230, 57, 70, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.cta-inner::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(230, 57, 70, 0.3), transparent);
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-title {
  font-size: var(--text-5xl);
  font-weight: 800;
  color: white;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-5);
}

.cta-subtitle {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.6);
  max-width: 520px;
  margin: 0 auto var(--space-10);
  line-height: 1.7;
}

.cta-buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

.cta-buttons .btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
}

.cta-buttons .btn-secondary {
  border-color: rgba(255, 255, 255, 0.15);
  color: white;
  background: rgba(255, 255, 255, 0.05);
}

.cta-buttons .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
  color: white;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  padding: var(--space-12) 0;
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-copy {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.footer-links {
  display: flex;
  gap: var(--space-6);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-text);
}

/* ========================================
   ANIMATIONS
   ======================================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ========================================
   RESPONSIVE — TABLET
   ======================================== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: var(--text-5xl);
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .hero-visual {
    max-width: 560px;
    margin: 0 auto;
  }

  .about-grid,
  .project-grid {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .method-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .modules-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .navbar-nav {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .section-title {
    font-size: var(--text-3xl);
  }

  .cta-title {
    font-size: var(--text-4xl);
  }
}

/* ========================================
   RESPONSIVE — MOBILE
   ======================================== */
@media (max-width: 640px) {
  .section {
    padding: var(--space-16) 0;
  }

  .container {
    padding: 0 var(--space-4);
  }

  .hero {
    padding-top: calc(72px + var(--space-12));
    min-height: auto;
  }

  .hero-title {
    font-size: var(--text-4xl);
  }

  .hero-subtitle {
    font-size: var(--text-base);
  }

  .hero-features {
    grid-template-columns: 1fr;
  }

  .hero-meta {
    flex-wrap: wrap;
    gap: var(--space-5);
  }

  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-cta .btn {
    text-align: center;
  }

  .tech-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
  }

  .tech-card {
    padding: var(--space-5) var(--space-3);
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }

  .method-grid {
    grid-template-columns: 1fr;
  }

  .modules-grid {
    grid-template-columns: 1fr;
  }

  .about-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-2);
  }

  .cta-inner {
    padding: var(--space-12) var(--space-5);
  }

  .cta-title {
    font-size: var(--text-3xl);
  }

  .footer-inner {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }

  .mockup-content {
    grid-template-columns: 1fr;
  }

  .mockup-sidebar {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .section-title {
    font-size: var(--text-2xl);
  }

  .project-visual {
    order: -1;
  }
}

@media (max-width: 380px) {
  .hero-title {
    font-size: var(--text-3xl);
  }

  .tech-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}