/**
 * Apple Design System - Global Styles
 * Portfolio Site
 */

/* ========================================
   CSS Variables - Color System
   ======================================== */

:root {
  /* Background Colors */
  --bg-primary: #000000;
  --bg-secondary: #1d1d1f;
  --bg-tertiary: #2c2c2e;

  /* Text Colors */
  --text-primary: #f5f5f7;
  --text-secondary: #a1a1a6;
  --text-tertiary: #6e6e73;

  /* Brand Accent Colors */
  --accent-blue: #0a84ff;
  --accent-blue-hover: #409cff;
  --accent-green: #32d74b;
  --accent-orange: #ff9f0a;
  --accent-red: #ff453a;
  --accent-purple: #bf5af2;
  --accent-pink: #ff2d55;

  /* Border & Divider Colors */
  --border-primary: rgba(255, 255, 255, 0.1);
  --border-secondary: rgba(255, 255, 255, 0.05);
  --divider: rgba(255, 255, 255, 0.08);

  /* Shadow Colors */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2), 0 1px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.2), 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 4px 8px rgba(0, 0, 0, 0.2), 0 8px 24px rgba(0, 0, 0, 0.3), 0 16px 32px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 8px 16px rgba(0, 0, 0, 0.3), 0 16px 32px rgba(0, 0, 0, 0.4), 0 24px 48px rgba(0, 0, 0, 0.5);

  /* Glass Effect */
  --glass-bg: rgba(30, 30, 30, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);

  /* Spacing Scale (8px base) */
  --space-1: 0.25rem;
  /* 4px */
  --space-2: 0.5rem;
  /* 8px */
  --space-3: 0.75rem;
  /* 12px */
  --space-4: 1rem;
  /* 16px */
  --space-5: 1.25rem;
  /* 20px */
  --space-6: 1.5rem;
  /* 24px */
  --space-8: 2rem;
  /* 32px */
  --space-10: 2.5rem;
  /* 40px */
  --space-12: 3rem;
  /* 48px */
  --space-16: 4rem;
  /* 64px */
  --space-20: 5rem;
  /* 80px */
  --space-24: 6rem;
  /* 96px */
  --space-32: 8rem;
  /* 128px */

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

  /* Animation Duration */
  --duration-fast: 150ms;
  --duration-base: 300ms;
  --duration-slow: 500ms;

  /* Easing Functions */
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);

  /* Container Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
}

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

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background 0.3s ease, color 0.3s ease;
}

/* ========================================
   Typography
   ======================================== */

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

h1 {
  font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
  margin-bottom: 1.5rem;
}

h2 {
  font-size: clamp(2rem, 4vw + 0.5rem, 3rem);
  margin-bottom: 1.25rem;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 1rem;
}

h4 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

p {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent-blue-hover);
}

/* ========================================
   Layout Utilities
   ======================================== */

.container {
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-sm {
  max-width: var(--container-sm);
}

.container-md {
  max-width: var(--container-md);
}

.container-lg {
  max-width: var(--container-lg);
}

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

@media (max-width: 768px) {
  .section {
    padding: var(--space-16) 0;
  }
}

/* ========================================
   Button Styles
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: all var(--duration-base) var(--ease-out);
  text-decoration: none;
  min-height: 44px;
}

.btn-primary {
  background: var(--accent-blue);
  color: white;
}

.btn-primary:hover {
  background: var(--accent-blue-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(10, 132, 255, 0.3);
}

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

.btn-secondary:hover {
  background: var(--accent-blue);
  color: white;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  color: var(--text-primary);
  border: 1px solid var(--border-primary);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.2);
}

.btn-black {
  background: #000000;
  color: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-black:hover {
  background: #1d1d1f;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

.btn-black svg {
  color: #ffffff;
}

.btn-black {
  background: #000000;
  color: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-black:hover {
  background: #1d1d1f;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

/* ========================================
   Card Styles
   ======================================== */

.card {
  background: var(--bg-secondary);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  border: 1px solid var(--border-primary);
  box-shadow: var(--shadow-md);
  transition: all var(--duration-base) var(--ease-out);
}

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

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--glass-shadow);
}

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

/* Text Alignment */
.text-center {
  text-align: center;
}

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

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

/* Colors */
.text-primary {
  color: var(--text-primary);
}

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

.text-blue {
  color: var(--accent-blue);
}

/* Spacing */
.mt-4 {
  margin-top: var(--space-4);
}

.mt-8 {
  margin-top: var(--space-8);
}

.mb-4 {
  margin-bottom: var(--space-4);
}

.mb-8 {
  margin-bottom: var(--space-8);
}

/* Flex Utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

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

.justify-center {
  justify-content: center;
}

.gap-4 {
  gap: var(--space-4);
}

.gap-8 {
  gap: var(--space-8);
}

/* Grid Utilities */
.grid {
  display: grid;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-8);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

@media (max-width: 960px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

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

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in-up {
  animation: fadeInUp 600ms var(--ease-out);
}

.animate-delay-100 {
  animation-delay: 100ms;
}

.animate-delay-200 {
  animation-delay: 200ms;
}

.animate-delay-300 {
  animation-delay: 300ms;
}

/* Hover Animations */
.hover-lift {
  transition: transform var(--duration-base) var(--ease-out);
}

.hover-lift:hover {
  transform: translateY(-4px);
}

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

@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;
  }
}

/* Focus Visible */
*:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
  border-radius: 4px;
}

*:focus:not(:focus-visible) {
  outline: none;
}

/* ========================================
   Responsive Typography
   ======================================== */

@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
}

@media (min-width: 1920px) {
  html {
    font-size: 18px;
  }
}

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

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-primary);
  transition: all var(--duration-base) ease;
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
}

.navbar-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.navbar-logo:hover {
  opacity: 0.7;
}

.navbar-menu {
  display: none;
  gap: var(--space-8);
  list-style: none;
  margin: 0;
  padding: 0;
}

@media (min-width: 768px) {
  .navbar-menu {
    display: flex;
  }

  .navbar-toggle {
    display: none !important;
  }
}

.navbar-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: none;
  transition: opacity 0.2s ease;
  position: relative;
}

.navbar-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-blue);
  transition: width var(--duration-base) ease;
}

.navbar-link:hover {
  opacity: 0.7;
  color: var(--accent-blue);
}

.navbar-link:hover::after {
  width: 100%;
}

.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  padding: var(--space-2);
  cursor: pointer;
}

.navbar-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--duration-base) ease;
}

/* Navbar Toggle Animation */
.navbar-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translateY(7px);
}

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

.navbar-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translateY(-7px);
}

/* Mobile Menu Active State */
@media (max-width: 767px) {
  .navbar-menu {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: var(--space-12) var(--space-6);
    gap: var(--space-6);
    transform: translateX(100%);
    transition: transform var(--duration-base) var(--ease-out);
    z-index: 999;
  }

  .navbar-menu.active {
    display: flex;
    transform: translateX(0);
  }

  .navbar-menu li {
    width: 100%;
  }

  .navbar-link {
    display: block;
    padding: var(--space-4);
    font-size: 1.25rem;
    text-align: center;
    width: 100%;
  }
}

/* Navbar Scrolled State */
.navbar.scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 var(--border-primary), var(--shadow-sm);
}

/* ========================================
   Scroll Reveal Animations
   ======================================== */

/* Initial state - elements are hidden */
.animate-fade-in-up:not(.revealed),
.card:not(.revealed),
.stat-card:not(.revealed),
.feature-card:not(.revealed),
.skill-card:not(.revealed),
.project-card:not(.revealed),
.strength-card:not(.revealed),
.experience-item:not(.revealed),
.cert-item:not(.revealed),
.testimonial-card:not(.revealed),
.challenge-card:not(.revealed) {
  opacity: 0;
  transform: translateY(30px);
}

/* Revealed state - smooth transition */
.revealed {
  opacity: 1 !important;
  transform: translateY(0) !important;
  transition: opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-out);
}

/* ========================================
   Back to Top Button
   ======================================== */

.back-to-top {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  width: 48px;
  height: 48px;
  background: var(--accent-blue);
  color: white;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--duration-base) var(--ease-out);
  z-index: 1000;
}

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

.back-to-top:hover {
  background: var(--accent-blue-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.back-to-top svg {
  width: 24px;
  height: 24px;
}

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

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #000000 0%, #1d1d1f 100%);
  color: white;
  text-align: center;
  padding: var(--space-24) var(--space-6);
  position: relative;
  padding-top: calc(var(--space-24) + 60px);
  overflow: hidden;
}

.hero-background {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-12);
  opacity: 0.15;
  pointer-events: none;
  z-index: 0;
}

.icon-row {
  display: flex;
  gap: var(--space-16);
  white-space: nowrap;
  animation: scroll 40s linear infinite;
}

.icon-row.reverse {
  animation: scroll-reverse 50s linear infinite;
}

.icon-row i {
  font-size: 5rem;
  color: white;
}

@keyframes scroll {
  0% {
    transform: translateX(0);
  }

  100% {
    transform: translateX(-50%);
  }
}

@keyframes scroll-reverse {
  0% {
    transform: translateX(-50%);
  }

  100% {
    transform: translateX(0);
  }
}

/* Duplicate icons for seamless scroll */
.icon-row::after {
  content: '';
  display: flex;
  gap: var(--space-16);
}

/* Note: In a real implementation we would duplicate the inner HTML in JS or markup,
   but for CSS-only we can use a slightly larger width or repeat the icons in markup.
   Let's ensure the markup has enough icons.
*/


.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
}

.hero-label {
  color: rgba(255, 255, 255, 0.9);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-4);
}

.hero-title {
  font-size: clamp(1.5rem, 8vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--space-6);
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.gradient-text {
  background: linear-gradient(135deg, #fff 0%, rgba(255, 255, 255, 0.8) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.125rem, 3vw, 1.25rem);
  font-weight: 400;
  opacity: 0.9;
  max-width: 700px;
  margin: 0 auto var(--space-10);
  line-height: 1.6;
}

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

.hero-socials {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-10);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  color: white;
  transition: all var(--duration-base) var(--ease-out);
  text-decoration: none;
}

.social-link:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.3);
  color: var(--accent-blue);
}

.social-link i {
  font-size: 1.5rem;
}

.social-link svg {
  transition: transform var(--duration-base) var(--ease-out);
}

.social-link:hover svg {
  transform: scale(1.1);
}

.scroll-indicator {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
  opacity: 0.6;
}

.scroll-indicator svg {
  color: white;
}

@keyframes bounce {

  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateX(-50%) translateY(0);
  }

  40% {
    transform: translateX(-50%) translateY(-10px);
  }

  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

/* ========================================
   Section Headers
   ======================================== */

.section-header {
  margin-bottom: var(--space-12);
}

.section-label {
  color: var(--accent-blue);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 700px;
  margin: 0 auto;
}

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

.profile-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-12);
  padding: var(--space-12);
  align-items: start;
}

.profile-image-col {
  text-align: center;
}

.profile-image-wrapper {
  width: 200px;
  height: 200px;
  margin: 0 auto var(--space-4);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  border: 4px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

.profile-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out);
}

.profile-image-wrapper:hover .profile-image {
  transform: scale(1.05);
}

.profile-image-caption {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
}

.profile-image-caption span {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.profile-info-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.profile-bio {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.profile-bio p {
  margin-bottom: var(--space-4);
}

.profile-bio p:last-child {
  margin-bottom: 0;
}

.profile-bio strong {
  color: var(--text-primary);
  font-weight: 600;
}

.profile-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-primary);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.95rem;
  color: var(--text-secondary);
}

@media (max-width: 992px) {
  .profile-layout {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    padding: var(--space-8);
  }

  .profile-image-wrapper {
    width: 180px;
    height: 180px;
  }

  .profile-bio {
    font-size: 1rem;
  }
}

/* ========================================
   Experience Section
   ======================================== */

.experience-timeline {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.experience-item {
  padding: var(--space-8);
}

.experience-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.experience-company {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.experience-position {
  color: var(--accent-blue);
  font-weight: 500;
  font-size: 1rem;
}

.experience-period {
  color: var(--text-secondary);
  font-size: 0.875rem;
  white-space: nowrap;
}

.experience-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-6);
}

.experience-achievements {
  margin-bottom: var(--space-6);
}

.experience-achievements h4 {
  font-size: 1rem;
  margin-bottom: var(--space-3);
}

.experience-achievements ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.experience-achievements li {
  position: relative;
  padding-left: var(--space-6);
  margin-bottom: var(--space-3);
  line-height: 1.6;
  color: var(--text-secondary);
}

.experience-achievements li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent-green);
  font-weight: 700;
}

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

.skills-grid {
  margin-bottom: var(--space-16);
}

.skill-card {
  padding: var(--space-8);
  text-align: center;
}

.skill-icon {
  font-size: 3rem;
  margin-bottom: var(--space-4);
}

.skill-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-4);
}

.skill-items {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(10, 132, 255, 0.1);
  border: 1px solid rgba(10, 132, 255, 0.2);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent-blue);
  transition: all var(--duration-fast) ease;
}

.tag i {
  font-size: 1rem;
}

.tag:hover {
  background: rgba(102, 126, 234, 0.2);
  transform: translateY(-2px);
}

/* Certifications */
.certifications {
  margin-top: var(--space-16);
}

.cert-grid {
  max-width: 900px;
  margin: 0 auto;
}

.cert-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-6);
}

.cert-icon {
  font-size: 2rem;
}

.cert-item h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-1);
}

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

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-8);
  max-width: 1200px;
  margin: 0 auto;
}

.project-card {
  position: relative;
  display: flex;
  flex-direction: column;
}

.project-image-wrapper {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.project-image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-icon {
  font-size: 5rem;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.project-icon-img {
  width: 180px;
  height: 180px;
  object-fit: contain;
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.15));
}

.project-hero-icon-img {
  width: 240px;
  height: 240px;
  object-fit: contain;
  filter: drop-shadow(0 8px 24px rgba(0, 0, 0, 0.2));
}

.project-badge {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-blue);
}

.project-content {
  padding: var(--space-8);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.project-category {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: var(--space-4);
}

.project-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-6);
  flex: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.project-footer {
  display: flex;
  gap: var(--space-4);
  margin-top: auto;
  flex-wrap: nowrap;
}

.card-link {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.store-badge {
  position: relative;
  z-index: 2;
  display: inline-block;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.store-badge:hover {
  opacity: 0.8;
  transform: scale(1.05);
}

.store-badge img {
  display: block;
  height: 40px;
  width: auto;
}

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

.contact-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.contact-card {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-8);
  text-decoration: none;
  color: inherit;
}

.contact-icon {
  font-size: 2.5rem;
}

.contact-card h4 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-1);
}

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

.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-primary);
  padding: var(--space-12) var(--space-6);
  text-align: center;
}

.footer-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.footer-subtext {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin: 0;
}

/* ========================================
   Project Detail Page
   ======================================== */

.project-hero {
  padding: calc(var(--space-24) + 60px) var(--space-6) var(--space-24);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  font-size: 0.875rem;
  margin-bottom: var(--space-8);
  transition: all var(--duration-fast) ease;
}

.back-link:hover {
  color: white;
  transform: translateX(-4px);
}

.project-hero-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.project-hero-icon {
  font-size: 5rem;
  margin-bottom: var(--space-4);
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

.project-hero-title {
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.project-hero-tagline {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  opacity: 0.9;
  margin-bottom: var(--space-6);
}

.project-hero-description {
  font-size: 1.125rem;
  opacity: 0.9;
  line-height: 1.6;
  margin-bottom: var(--space-12);
}

.project-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-10);
  padding: var(--space-6);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

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

.meta-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.8;
  margin-bottom: var(--space-2);
}

.meta-value {
  display: block;
  font-size: 1rem;
  font-weight: 600;
}

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

/* Overview Stats */
.overview-grid {
  max-width: 900px;
  margin: 0 auto;
}

.stat-card {
  padding: var(--space-8);
}

.stat-value {
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent-blue);
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.stat-description {
  font-size: 0.875rem;
  margin: 0;
}

/* Features */
.features-grid {
  max-width: 1000px;
  margin: 0 auto;
}

.feature-card {
  padding: var(--space-8);
}

.feature-icon-large {
  font-size: 3.5rem;
  margin-bottom: var(--space-4);
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-3);
}

.feature-card p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* Tech Stack */
.tech-stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-8);
}

.tech-stack-section h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-4);
}

/* Challenges */
.challenges-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.challenge-card {
  padding: var(--space-8);
}

.challenge-card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-3);
}

.challenge-card p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
}

.testimonial-card {
  padding: var(--space-8);
}

.testimonial-stars {
  font-size: 1.25rem;
  margin-bottom: var(--space-4);
}

.testimonial-text {
  font-size: 1.125rem;
  line-height: 1.6;
  margin-bottom: var(--space-6);
  font-style: italic;
}

.testimonial-author {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  margin: 0;
}

/* CTA Section */
.cta-section {
  padding: var(--space-24) var(--space-6);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

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

.mb-4 {
  margin-bottom: var(--space-4);
}

.mb-8 {
  margin-bottom: var(--space-8);
}