/* ============================================
   个人简历网站 - 主样式表
   版本: 1.0.0
   ============================================ */

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

:root {
  /* ---- Light Theme (Default) ---- */
  --color-primary: #0f172a;
  --color-primary-light: #1e293b;
  --color-secondary: #475569;
  --color-accent: #3b82f6;
  --color-accent-hover: #2563eb;
  --color-accent-gradient: linear-gradient(135deg, #3b82f6, #6366f1);
  --color-accent-gradient-2: linear-gradient(135deg, #6366f1, #8b5cf6);
  --color-bg: #f8fafc;
  --color-bg-alt: #f1f5f9;
  --color-bg-card: #ffffff;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-muted: #94a3b8;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-overlay: rgba(15, 23, 42, 0.7);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

  /* Layout */
  --max-width: 1200px;
  --header-height: 70px;
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-lg: 16px;
  --border-radius-xl: 24px;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --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: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3.5rem;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ---- Dark Theme ---- */
[data-theme="dark"] {
  --color-primary: #f8fafc;
  --color-primary-light: #e2e8f0;
  --color-secondary: #94a3b8;
  --color-accent: #60a5fa;
  --color-accent-hover: #93c5fd;
  --color-accent-gradient: linear-gradient(135deg, #60a5fa, #818cf8);
  --color-accent-gradient-2: linear-gradient(135deg, #818cf8, #a78bfa);
  --color-bg: #0f172a;
  --color-bg-alt: #1e293b;
  --color-bg-card: #1e293b;
  --color-text: #f1f5f9;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  --color-border: #334155;
  --color-border-light: #1e293b;
  --color-overlay: rgba(0, 0, 0, 0.8);
  --shadow-sm: 0 1px 2px 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, 0.4);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
}

/* ---- Base Elements ---- */
html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

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

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* ---- Typography Utilities ---- */
.gradient-text {
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-text-2 {
  background: var(--color-accent-gradient-2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-alt);
}

::-webkit-scrollbar-thumb {
  background: var(--color-text-muted);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-secondary);
}

/* ---- Selection ---- */
::selection {
  background: var(--color-accent);
  color: #fff;
}

/* ============================================
   Utility Classes
   ============================================ */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 10%, transparent);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--border-radius-sm);
  font-weight: 600;
  font-size: var(--font-size-sm);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--color-accent-gradient);
  color: #fff;
  box-shadow: 0 4px 14px color-mix(in srgb, var(--color-accent) 40%, transparent);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px color-mix(in srgb, var(--color-accent) 50%, transparent);
  color: #fff;
}

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

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

.btn-sm {
  padding: 8px 20px;
  font-size: var(--font-size-xs);
}

/* ---- Access Denied Overlay ---- */
.access-overlay {
  position: fixed;
  inset: 0;
  z-index: 99999;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.access-overlay.active {
  opacity: 1;
  visibility: visible;
}

.access-denied-card {
  text-align: center;
  max-width: 480px;
  padding: 48px;
  background: var(--color-bg-card);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
}

.access-denied-card .icon {
  font-size: 64px;
  margin-bottom: 24px;
  display: block;
}

.access-denied-card h2 {
  font-size: var(--font-size-2xl);
  margin-bottom: 12px;
  color: var(--color-text);
}

.access-denied-card p {
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  line-height: 1.6;
}

/* ============================================
   Header / Navigation
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: transparent;
  transition: all var(--transition-base);
}

.header.scrolled {
  background: color-mix(in srgb, var(--color-bg-card) 85%, transparent);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--color-border);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.5px;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-list a {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  position: relative;
  padding: 4px 0;
  transition: color var(--transition-fast);
}

.nav-list a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent-gradient);
  transition: width var(--transition-base);
  border-radius: 1px;
}

.nav-list a:hover,
.nav-list a.active {
  color: var(--color-text);
}

.nav-list a:hover::after,
.nav-list a.active::after {
  width: 100%;
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: 1.2rem;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  background: var(--color-bg-alt);
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-border);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  cursor: pointer;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

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

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

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

/* ============================================
   Hero Section
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--header-height);
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 0;
}

.hero-bg .gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
  animation: orbFloat 20s ease-in-out infinite;
}

.hero-bg .gradient-orb:nth-child(1) {
  width: 600px;
  height: 600px;
  background: #3b82f6;
  top: -200px;
  right: -150px;
}

.hero-bg .gradient-orb:nth-child(2) {
  width: 400px;
  height: 400px;
  background: #6366f1;
  bottom: -100px;
  left: -100px;
  animation-delay: -7s;
}

.hero-bg .gradient-orb:nth-child(3) {
  width: 300px;
  height: 300px;
  background: #8b5cf6;
  top: 40%;
  left: 50%;
  animation-delay: -14s;
}

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

.hero-content {
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 10%, transparent);
  padding: 8px 20px;
  border-radius: 100px;
  margin-bottom: 24px;
  border: 1px solid color-mix(in srgb, var(--color-accent) 20%, transparent);
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  animation: pulse 2s ease-in-out infinite;
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 8px;
  letter-spacing: -1.5px;
}

.hero-title-2 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-secondary);
  margin-bottom: 24px;
}

.hero-desc {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  line-height: 1.8;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.stat-item .stat-number {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-text);
  line-height: 1;
  margin-bottom: 4px;
}

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

/* ============================================
   About Section
   ============================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-image-wrapper {
  position: relative;
}

.about-image-placeholder {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--border-radius-lg);
  background: var(--color-accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 80px;
  opacity: 0.8;
}

.about-image-wrapper::before {
  content: '';
  position: absolute;
  top: -16px;
  left: -16px;
  right: 16px;
  bottom: 16px;
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  z-index: -1;
}

.about-content h3 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: 16px;
}

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

.about-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 32px 0;
}

.about-detail-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--color-bg-alt);
  border-radius: var(--border-radius-sm);
}

.about-detail-item .label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  min-width: 60px;
}

.about-detail-item .value {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
}

/* ============================================
   Experience Section
   ============================================ */
.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-bottom: 48px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -38px;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-accent);
}

.timeline-item.current .timeline-dot {
  background: var(--color-success);
  box-shadow: 0 0 0 2px var(--color-success);
  animation: pulse 2s ease-in-out infinite;
}

.timeline-content {
  background: var(--color-bg-card);
  padding: 28px 32px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.timeline-content:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-lg);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 8px;
}

.timeline-company {
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  font-weight: 600;
  display: block;
  margin-bottom: 4px;
}

.timeline-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text);
}

.timeline-date {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: 500;
  white-space: nowrap;
}

.timeline-desc {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.7;
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.timeline-tag {
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 10%, transparent);
  padding: 4px 12px;
  border-radius: 100px;
}

/* ============================================
   Skills Section
   ============================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.skill-category {
  background: var(--color-bg-card);
  padding: 32px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

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

.skill-category-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.skill-category-title .icon {
  font-size: 1.4rem;
}

.skill-item {
  margin-bottom: 20px;
}

.skill-item:last-child {
  margin-bottom: 0;
}

.skill-info {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: var(--font-size-sm);
}

.skill-name {
  font-weight: 600;
  color: var(--color-text);
}

.skill-percent {
  color: var(--color-accent);
  font-weight: 600;
  font-family: var(--font-mono);
}

.skill-bar {
  height: 8px;
  background: var(--color-bg-alt);
  border-radius: 100px;
  overflow: hidden;
}

.skill-bar-fill {
  height: 100%;
  border-radius: 100px;
  background: var(--color-accent-gradient);
  width: 0;
  transition: width 1.5s ease;
}

.skill-bar-fill.animated {
  width: var(--skill-width);
}

/* ============================================
   Projects Section
   ============================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--color-bg-card);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: color-mix(in srgb, var(--color-accent) 30%, transparent);
}

.project-image {
  height: 200px;
  background: var(--color-accent-gradient);
  opacity: 0.9;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
}

.project-body {
  padding: 24px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.project-tag {
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 10%, transparent);
  padding: 4px 10px;
  border-radius: 100px;
}

.project-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text);
}

.project-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.project-links {
  display: flex;
  gap: 12px;
}

.project-link {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.project-link:hover {
  color: var(--color-accent-hover);
}

/* ============================================
   Education Section
   ============================================ */
.education-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.education-card {
  background: var(--color-bg-card);
  padding: 32px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  text-align: center;
}

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

.education-icon {
  font-size: 40px;
  margin-bottom: 16px;
}

.education-degree {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: 4px;
}

.education-school {
  color: var(--color-accent);
  font-weight: 600;
  font-size: var(--font-size-sm);
  margin-bottom: 8px;
}

.education-date {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.education-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: 12px;
  line-height: 1.6;
}

/* ============================================
   Contact Section
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info h3 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: 16px;
}

.contact-info > p {
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

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

.contact-item-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius-sm);
  background: color-mix(in srgb, var(--color-accent) 10%, transparent);
  font-size: 1.3rem;
}

.contact-item-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: 2px;
}

.contact-item-value {
  font-weight: 600;
  color: var(--color-text);
}

.contact-form {
  background: var(--color-bg-card);
  padding: 32px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

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

.form-group label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  color: var(--color-text);
  transition: all var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 15%, transparent);
}

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

.submit-btn {
  width: 100%;
  padding: 14px 28px;
  background: var(--color-accent-gradient);
  color: #fff;
  border: none;
  border-radius: var(--border-radius-sm);
  font-weight: 600;
  font-size: var(--font-size-base);
  transition: all var(--transition-base);
  cursor: pointer;
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px color-mix(in srgb, var(--color-accent) 40%, transparent);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}

.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

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

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

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

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

/* ============================================
   Scroll Animations
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: all 0.8s ease;
}

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

.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: all 0.8s ease;
}

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

.fade-in-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.8s ease;
}

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

/* ---- Animation Keyframes ---- */
@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(50px, -50px) scale(1.1); }
  50% { transform: translate(-30px, 30px) scale(0.9); }
  75% { transform: translate(30px, 50px) scale(1.05); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

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

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
  :root {
    --font-size-5xl: 2.8rem;
    --font-size-4xl: 2.2rem;
  }

  .about-grid {
    gap: 40px;
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2.2rem;
    --font-size-4xl: 1.8rem;
    --font-size-3xl: 1.6rem;
    --header-height: 60px;
  }

  .section {
    padding: 60px 0;
  }

  .nav-list {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-bg-card);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%);
    transition: transform var(--transition-base);
    border-bottom: 1px solid var(--color-border);
  }

  .nav-list.open {
    transform: translateY(0);
  }

  .hamburger {
    display: flex;
  }

  .hero-stats {
    gap: 24px;
    flex-wrap: wrap;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .about-image-wrapper {
    max-width: 300px;
    margin: 0 auto;
  }

  .about-details {
    grid-template-columns: 1fr;
  }

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

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

  .footer .container {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.8rem;
  }

  .hero-actions {
    flex-direction: column;
  }

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

  .timeline-content {
    padding: 20px;
  }

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

/* ============================================
   Print Styles
   ============================================ */
@media print {
  .header,
  .theme-toggle,
  .hero-bg,
  .hamburger,
  .contact-form,
  .footer {
    display: none !important;
  }

  .hero {
    min-height: auto;
    padding: 40px 0;
  }

  .section {
    padding: 30px 0;
    page-break-inside: avoid;
  }

  .timeline-content {
    box-shadow: none;
    border: 1px solid #ddd;
  }

  .skill-bar-fill {
    width: var(--skill-width) !important;
  }

  .project-card {
    box-shadow: none;
    border: 1px solid #ddd;
  }

  .education-card {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}