/* ===================================
   Modern Portfolio Design System
   Built for Adamu Abubakar - adamu.tech
   =================================== */

/* CSS Variables */
:root {
  /* Colors - Light Mode */
  --color-primary: #2563eb;
  --color-primary-dark: #1e40af;
  --color-primary-light: #3b82f6;
  --color-secondary: #7c3aed;
  --color-secondary-dark: #6d28d9;
  --color-accent: #f59e0b;
  
  --color-text: #1e293b;
  --color-text-light: #64748b;
  --color-background: #ffffff;
  --color-background-alt: #f8fafc;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
  --gradient-hero: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Poppins', 'Inter', sans-serif;
  
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Premium motion */
  --elevate: translateY(-6px);
  --shine: linear-gradient(120deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.35) 45%, rgba(255,255,255,0) 70%);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  /* Focus ring */
  --focus-ring: 0 0 0 3px rgba(37, 99, 235, 0.35);
  --focus-ring-dark: 0 0 0 3px rgba(59, 130, 246, 0.45);
  
  /* Container */
  --container-max-width: 1280px;
  --container-padding: 1.5rem;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --color-text: #f1f5f9;
  --color-text-light: #94a3b8;
  --color-background: #0f172a;
  --color-background-alt: #1e293b;
  --color-surface: #1e293b;
  --color-border: #334155;
  
  --gradient-hero: linear-gradient(135deg, rgba(37, 99, 235, 0.15) 0%, rgba(124, 58, 237, 0.15) 100%);
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);

  --focus-ring: var(--focus-ring-dark);
}

/* Skip link for keyboard users */
.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  width: auto;
  height: auto;
  padding: 0.6rem 0.9rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-md);
  z-index: 2000;
  box-shadow: var(--shadow-lg);
}

/* ===================================
   Reset & Base Styles
   =================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-background);
  transition: background-color var(--transition-base), color var(--transition-base);
  overflow-x: hidden;
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

/* Visible, consistent focus treatment */
:where(a, button, input, textarea, select, summary):focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-md);
}

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

button {
  font-family: inherit;
  cursor: pointer;
}

/* ===================================
   Utility Classes
   =================================== */

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.lead {
  font-size: var(--font-size-lg);
  font-weight: 500;
  line-height: 1.6;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

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

/* ===================================
   Navigation
   =================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
  background-color: rgba(255, 255, 255, 0.95);
}

[data-theme="dark"] .navbar.scrolled {
  background-color: rgba(15, 23, 42, 0.95);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem var(--container-padding);
  max-width: var(--container-max-width);
  margin: 0 auto;
}

.nav-brand {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: var(--font-size-xl);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  font-weight: 500;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--color-text);
  font-weight: 500;
  font-size: var(--font-size-sm);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--color-primary);
  background-color: var(--color-background-alt);
}

/* Current section/page hint (works with aria-current="page") */
.nav-link[aria-current="page"] {
  color: var(--color-primary);
  background-color: rgba(37, 99, 235, 0.10);
  border: 1px solid rgba(37, 99, 235, 0.20);
}

.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 6px;
  height: 2px;
  border-radius: 999px;
  background: var(--gradient-primary);
  opacity: 0.9;
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 0.35rem;
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background-color: var(--color-background);
  color: var(--color-text);
  transition: all var(--transition-base);
}

.theme-toggle:hover {
  background-color: var(--color-background-alt);
  border-color: var(--color-primary);
  transform: rotate(20deg);
}

.sun-icon {
  display: none;
}

.moon-icon {
  display: block;
}

[data-theme="dark"] .sun-icon {
  display: block;
}

[data-theme="dark"] .moon-icon {
  display: none;
}

/* ===================================
   Hero Section
   =================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-3xl) 0 var(--spacing-2xl);
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
}

.hero-gradient {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-hero);
}

.hero-pattern {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 16% 42%, rgba(37, 99, 235, 0.08) 0%, transparent 55%),
    radial-gradient(circle at 78% 76%, rgba(124, 58, 237, 0.08) 0%, transparent 55%),
    radial-gradient(circle at 55% 12%, rgba(245, 158, 11, 0.06) 0%, transparent 55%);
  opacity: 0.5;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  padding-top: 80px;
}

.hero-text {
  z-index: 1;
}

.greeting-container {
  margin-bottom: var(--spacing-lg);
}

.greeting {
  font-size: var(--font-size-3xl);
  font-weight: 600;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0;
  transition: opacity 0.8s ease-in-out;
  margin-bottom: var(--spacing-md);
}

.greeting.visible {
  opacity: 1;
}

.greeting-fallback {
  font-size: var(--font-size-3xl);
  font-weight: 600;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title {
  /* Fluid headline: stays punchy on mobile, premium on desktop */
  font-size: clamp(2.25rem, 4.5vw + 1rem, 3.75rem);
  margin-bottom: var(--spacing-md);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 1.2vw + 0.85rem, 1.35rem);
  color: var(--color-text);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.hero-description {
  font-size: clamp(1rem, 0.6vw + 0.95rem, 1.125rem);
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: var(--spacing-xl);
  max-width: 600px;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.hero-visual {
  z-index: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-xl);
  max-width: 500px;
  position: relative;
  overflow: hidden;
}

.hero-card::before {
  content: "";
  position: absolute;
  inset: -2px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.25), rgba(124, 58, 237, 0.18), rgba(245, 158, 11, 0.12));
  filter: blur(18px);
  opacity: 0.55;
  pointer-events: none;
}

.hero-card > * {
  position: relative;
}

.floating {
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

.code-snippet {
  background: var(--color-background-alt);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.code-header {
  display: flex;
  gap: 0.5rem;
  padding: var(--spacing-sm);
  background: var(--color-border);
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-full);
  background: var(--color-text-light);
}

.dot:nth-child(1) { background: #ef4444; }
.dot:nth-child(2) { background: #f59e0b; }
.dot:nth-child(3) { background: #22c55e; }

.code-body {
  padding: var(--spacing-lg);
  font-family: 'Monaco', 'Courier New', monospace;
  font-size: var(--font-size-sm);
  line-height: 1.8;
  color: var(--color-text);
}

.code-body .comment { color: #6b7280; }
.code-body .keyword { color: #7c3aed; font-weight: 600; }
.code-body .function { color: #2563eb; }
.code-body .string { color: #059669; }

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.scroll-arrow {
  width: 22px;
  height: 22px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  opacity: 0.65;
  animation: nudge 1.6s ease-in-out infinite;
}

@keyframes nudge {
  0%, 100% { transform: translateY(0) rotate(45deg); opacity: 0.6; }
  50% { transform: translateY(6px) rotate(45deg); opacity: 0.95; }
}

/* ===================================
   Buttons (premium)
   =================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.85rem 1.1rem;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.2px;
  border: 1px solid transparent;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--shine);
  transform: translateX(-120%);
  transition: transform 600ms ease;
  pointer-events: none;
}

.btn:hover::after {
  transform: translateX(120%);
}

.btn:hover {
  transform: var(--elevate);
  box-shadow: var(--shadow-lg);
}

.btn:active {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
}

.btn-primary:hover {
  filter: saturate(1.05);
}

.btn-secondary {
  background: var(--color-background);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  border-color: rgba(37, 99, 235, 0.35);
}

/* ===================================
   Projects (more depth)
   =================================== */

.projects-grid {
  gap: var(--spacing-lg);
}

.project-card {
  transform: translateZ(0);
}

.project-card:hover {
  transform: var(--elevate);
  box-shadow: var(--shadow-xl);
}

.project-card::before {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(124, 58, 237, 0.06));
}

.project-icon {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(124, 58, 237, 0.12));
}

.project-link {
  border-radius: var(--radius-full);
  padding: 0.55rem 0.75rem;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.project-link:hover {
  transform: translateX(4px);
}

.scroll-arrow {
  width: 24px;
  height: 24px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: rotate(45deg) translateY(0); }
  40% { transform: rotate(45deg) translateY(10px); }
  60% { transform: rotate(45deg) translateY(5px); }
}

/* ===================================
   Section Styles
   =================================== */

section {
  padding: var(--spacing-3xl) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-label {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.section-title {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-md);
}

.section-description {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  max-width: 700px;
  margin: 0 auto;
}

/* ===================================
   About Section
   =================================== */

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

.about-content {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: var(--spacing-3xl);
  align-items: start;
}

.about-text p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-light);
  font-size: var(--font-size-lg);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  font-weight: 500;
}

.language-showcase {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  background: var(--color-surface);
  padding: var(--spacing-xl);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
}

.language-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--color-background);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.language-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.language-icon {
  font-size: var(--font-size-3xl);
}

.language-name {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
}

/* ===================================
   Projects Section
   =================================== */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

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

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

.project-icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  color: white;
}

.project-content {
  flex: 1;
}

.project-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
}

.project-description {
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag {
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  background: rgba(37, 99, 235, 0.08);
  color: var(--color-text);
  border-radius: var(--radius-full);
  border: 1px solid rgba(37, 99, 235, 0.18);
  letter-spacing: 0.01em;
}

[data-theme="dark"] .tag {
  background: rgba(37, 99, 235, 0.14);
  border-color: rgba(37, 99, 235, 0.28);
}

.project-footer {
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-weight: 600;
  color: var(--color-primary);
  transition: all var(--transition-fast);
}

.project-link:hover {
  gap: var(--spacing-sm);
}

/* ===================================
   Skills Section
   =================================== */

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

.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
}

.skill-category {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
}

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

.category-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.category-icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-background-alt);
  border-radius: var(--radius-lg);
  color: var(--color-primary);
}

.category-title {
  font-size: var(--font-size-xl);
}

.skill-items {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.skill-badge {
  font-size: var(--font-size-sm);
  font-weight: 600;
  padding: 0.5rem 1rem;
  background: var(--color-background-alt);
  color: var(--color-text);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.skill-badge:hover {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

/* ===================================
   Contact Section
   =================================== */

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.contact-card {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}

.contact-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.contact-icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-background-alt);
  border-radius: var(--radius-lg);
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact-details h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xs);
}

.contact-details a {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
}

.contact-details a:hover {
  color: var(--color-primary);
}

.cta-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
}

.cta-card h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-md);
}

.cta-card p {
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
}

.cta-list {
  list-style: none;
  margin-bottom: var(--spacing-xl);
}

.cta-list li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) 0;
  color: var(--color-text);
}

.cta-list svg {
  color: var(--color-primary);
  flex-shrink: 0;
}

/* ===================================
   Buttons
   =================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 0.75rem 1.5rem;
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: white;
}

.btn-secondary {
  background: var(--color-background);
  color: var(--color-text);
  border: 2px solid var(--color-border);
}

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

.btn-large {
  padding: 1rem 2rem;
  font-size: var(--font-size-lg);
}

/* ===================================
   Footer
   =================================== */

.footer {
  background-color: var(--color-background-alt);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-brand h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
}

.footer-brand p {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

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

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

.footer-social {
  display: flex;
  gap: var(--spacing-md);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text);
  transition: all var(--transition-base);
}

.footer-social a:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
  transform: translateY(-4px);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

.footer-bottom p {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  margin: 0.25rem 0;
}

/* ===================================
   Animations
   =================================== */

[data-animate] {
  opacity: 0;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].animated {
  opacity: 1;
}

[data-animate="fade-up"] {
  transform: translateY(30px);
}

[data-animate="fade-up"].animated {
  transform: translateY(0);
}

[data-animate="fade-right"] {
  transform: translateX(-30px);
}

[data-animate="fade-right"].animated {
  transform: translateX(0);
}

[data-animate="fade-left"] {
  transform: translateX(30px);
}

[data-animate="fade-left"].animated {
  transform: translateX(0);
}

/* Animation delays */
[data-delay="100"] {
  transition-delay: 100ms;
}

[data-delay="200"] {
  transition-delay: 200ms;
}

[data-delay="300"] {
  transition-delay: 300ms;
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }
  
  .hero-visual {
    order: -1;
  }
  
  .about-content {
    grid-template-columns: 1fr;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-content {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-links {
    align-items: center;
  }
  
  .footer-social {
    justify-content: center;
  }
}

@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
  }
  
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--spacing-lg);
    gap: var(--spacing-sm);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .hero {
    min-height: auto;
    padding: var(--spacing-2xl) 0;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
  
  .about-stats {
    grid-template-columns: 1fr;
  }
  
  .language-showcase {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .hero-card {
    padding: var(--spacing-md);
  }
  
  .code-body {
    font-size: 0.7rem;
  }
}

/* ===================================
   Accessibility
   =================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}

/* Focus styles */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-border: #000000;
  }
  
  [data-theme="dark"] {
    --color-border: #ffffff;
  }
}