/* ==========================================================================
   Apple Official Light Design System — M. Waleed Hassan Portfolio
   Clean, Refined, High-Contrast Light Theme (No AI Slop / No Neon Gradients)
   ========================================================================== */

:root {
  /* Apple Core Color Palette */
  --color-bg: #ffffff;
  --color-bg-subtle: #f5f5f7;
  --color-bg-card: #ffffff;
  --color-bg-elevated: #ffffff;
  --color-text-primary: #1d1d1f;
  --color-text-secondary: #6e6e73;
  --color-text-tertiary: #86868b;
  --color-text-quaternary: #a1a1a6;
  
  /* Apple Accent Blues & States */
  --color-accent: #0071e3;
  --color-accent-hover: #0077ed;
  --color-accent-subtle: #f0f6ff;
  --color-accent-border: #d2e3fc;
  
  /* Borders & Dividers */
  --color-border: #e5e5ea;
  --color-border-subtle: rgba(0, 0, 0, 0.06);
  --color-border-hover: rgba(0, 0, 0, 0.14);
  
  /* Shadows */
  --shadow-subtle: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.05);
  --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.08);
  --shadow-nav: 0 1px 0 rgba(0, 0, 0, 0.08);

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  /* Spacing & Radii */
  --radius-pill: 9999px;
  --radius-card: 20px;
  --radius-lg: 24px;
  --radius-sm: 10px;
  --max-width: 1120px;
  --nav-height: 52px;
  
  /* Transition Timing */
  --transition-fast: 0.18s cubic-bezier(0.2, 0, 0, 1);
  --transition-normal: 0.28s cubic-bezier(0.2, 0, 0, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.5;
  overflow-x: hidden;
}

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

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

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

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

.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px auto;
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.5rem;
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--color-text-primary);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.125rem;
  line-height: 1.55;
  color: var(--color-text-secondary);
  font-weight: 400;
}

/* --------------------------------------------------------------------------
   Apple Frosted Glass Navigation
   -------------------------------------------------------------------------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  z-index: 1000;
  transition: background-color var(--transition-normal), box-shadow var(--transition-normal);
}

.navbar.scrolled {
  background-color: rgba(255, 255, 255, 0.92);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.nav-container {
  max-width: var(--max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 0.9375rem;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
}

.brand-monogram {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background-color: var(--color-text-primary);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 7px;
  letter-spacing: 0.02em;
}

.brand-name {
  font-weight: 600;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  font-weight: 400;
  transition: color var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.mobile-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-text-primary);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* --------------------------------------------------------------------------
   Buttons & Pills
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  transition: all var(--transition-fast);
  text-align: center;
  cursor: pointer;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.8125rem;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: rgba(0, 0, 0, 0.04);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background-color: rgba(0, 0, 0, 0.08);
  border-color: rgba(0, 0, 0, 0.15);
  transform: translateY(-1px);
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero-section {
  padding-top: calc(var(--nav-height) + 70px);
  padding-bottom: 80px;
  text-align: center;
  background: radial-gradient(circle at 50% 20%, #fbfbfc 0%, #ffffff 70%);
}

.hero-container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.badge-dot {
  width: 7px;
  height: 7px;
  background-color: #34c759; /* Apple Green */
  border-radius: 50%;
}

.hero-title {
  font-size: 3.75rem;
  line-height: 1.08;
  font-weight: 700;
  letter-spacing: -0.035em;
  color: var(--color-text-primary);
  margin-bottom: 20px;
  max-width: 900px;
}

.hero-title-sub {
  color: var(--color-text-tertiary);
  font-weight: 600;
}

.hero-description {
  font-size: 1.25rem;
  line-height: 1.55;
  color: var(--color-text-secondary);
  max-width: 680px;
  margin: 0 auto 36px auto;
  font-weight: 400;
}

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

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 60px;
}

/* Apple-style Specification Strip */
.spec-strip {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 16px 36px;
  box-shadow: var(--shadow-subtle);
  width: 100%;
  max-width: 820px;
}

.spec-item {
  flex: 1;
  text-align: center;
  padding: 0 12px;
}

.spec-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

.spec-value {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.spec-divider {
  width: 1px;
  height: 32px;
  background-color: var(--color-border);
}

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

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

.about-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 36px 30px;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  box-shadow: var(--shadow-subtle);
}

.about-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.card-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background-color: var(--color-bg-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-primary);
  margin-bottom: 22px;
}

.about-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin-bottom: 12px;
  color: var(--color-text-primary);
}

.about-card p {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

/* --------------------------------------------------------------------------
   Projects Section (Apple Bento Grid)
   -------------------------------------------------------------------------- */
.projects-section {
  background-color: var(--color-bg);
}

.bento-grid {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.bento-card {
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.bento-card:hover {
  box-shadow: var(--shadow-card);
}

.bento-content {
  padding: 48px 44px;
}

.project-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.bento-title {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 14px;
  color: var(--color-text-primary);
}

.bento-description {
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.tech-stack-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.pill {
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background-color: #ffffff;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.bento-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

.feature-check {
  color: #34c759;
  font-weight: 700;
  font-size: 0.875rem;
  margin-top: 1px;
}

.bento-preview-wrap {
  padding: 40px;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* --------------------------------------------------------------------------
   Mockup 1: Aura Music Player (Apple Music Aesthetic)
   -------------------------------------------------------------------------- */
.mockup-player {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 28px;
  width: 100%;
  max-width: 380px;
  box-shadow: var(--shadow-card);
}

.player-top {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 24px;
}

.player-album-art {
  width: 68px;
  height: 68px;
  border-radius: 14px;
  overflow: hidden;
  background: linear-gradient(135deg, #0071e3 0%, #34c759 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(0, 113, 227, 0.25);
}

.player-title {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.player-artist {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

.player-badge {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-accent);
  background-color: var(--color-accent-subtle);
  padding: 2px 8px;
  border-radius: 4px;
  letter-spacing: 0.02em;
}

/* Waveform Visualizer */
.player-waveform {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 38px;
  gap: 4px;
  padding: 0 6px;
  margin-bottom: 20px;
}

.player-waveform .bar {
  flex: 1;
  background-color: var(--color-accent);
  border-radius: 3px;
  opacity: 0.85;
  transition: height var(--transition-fast);
}

.bar-1  { height: 35%; }
.bar-2  { height: 60%; }
.bar-3  { height: 90%; }
.bar-4  { height: 45%; }
.bar-5  { height: 75%; }
.bar-6  { height: 100%; }
.bar-7  { height: 65%; }
.bar-8  { height: 80%; }
.bar-9  { height: 40%; }
.bar-10 { height: 70%; }
.bar-11 { height: 95%; }
.bar-12 { height: 50%; }

.mockup-player.playing .player-waveform .bar {
  animation: waveMotion 1.2s infinite ease-in-out alternate;
}

@keyframes waveMotion {
  0% { transform: scaleY(0.4); }
  100% { transform: scaleY(1.1); }
}

.mockup-player.playing .bar-2  { animation-delay: 0.15s; }
.mockup-player.playing .bar-3  { animation-delay: 0.3s; }
.mockup-player.playing .bar-4  { animation-delay: 0.45s; }
.mockup-player.playing .bar-5  { animation-delay: 0.2s; }
.mockup-player.playing .bar-6  { animation-delay: 0.5s; }
.mockup-player.playing .bar-7  { animation-delay: 0.35s; }
.mockup-player.playing .bar-8  { animation-delay: 0.1s; }
.mockup-player.playing .bar-9  { animation-delay: 0.4s; }
.mockup-player.playing .bar-10 { animation-delay: 0.25s; }
.mockup-player.playing .bar-11 { animation-delay: 0.55s; }
.mockup-player.playing .bar-12 { animation-delay: 0.3s; }

.player-progress {
  margin-bottom: 24px;
}

.progress-bar {
  width: 100%;
  height: 5px;
  background-color: var(--color-border);
  border-radius: var(--radius-pill);
  overflow: hidden;
  margin-bottom: 8px;
}

.progress-fill {
  width: 52%;
  height: 100%;
  background-color: var(--color-text-primary);
  border-radius: var(--radius-pill);
}

.progress-time {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  font-weight: 500;
}

.player-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
}

.player-btn {
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.player-btn:hover {
  transform: scale(1.08);
  color: var(--color-accent);
}

.player-play {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-text-primary);
  color: #ffffff;
}

.player-play:hover {
  background-color: var(--color-accent);
  color: #ffffff;
}

/* --------------------------------------------------------------------------
   Mockup 2: Feno AI Agent Console (Apple Developer Style)
   -------------------------------------------------------------------------- */
.mockup-console {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  font-family: var(--font-mono);
}

.console-header {
  background-color: var(--color-bg-subtle);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.console-dots {
  display: flex;
  align-items: center;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-red { background-color: #ff5f56; }
.dot-yellow { background-color: #ffbd2e; }
.dot-green { background-color: #27c93f; }

.console-title {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

.console-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.6875rem;
  font-weight: 600;
  color: #34c759;
}

.status-indicator {
  width: 6px;
  height: 6px;
  background-color: #34c759;
  border-radius: 50%;
}

.console-body {
  padding: 20px;
  font-size: 0.8125rem;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.console-line {
  color: var(--color-text-primary);
  word-break: break-word;
}

.text-muted { color: var(--color-text-tertiary); }
.text-success { color: #28a745; font-weight: 500; }
.text-accent { color: var(--color-accent); font-weight: 500; }

.prompt-symbol {
  color: var(--color-text-tertiary);
  margin-right: 6px;
}

.code-highlight {
  background-color: var(--color-bg-subtle);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
}

.console-step-box {
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 12px;
}

.step-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.6875rem;
  margin-bottom: 6px;
}

.step-label {
  font-weight: 700;
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
}

.step-confidence {
  color: #0071e3;
  font-weight: 600;
}

.step-content {
  font-size: 0.75rem;
  color: var(--color-text-primary);
  line-height: 1.45;
}

.console-cursor {
  display: inline-block;
  width: 8px;
  height: 14px;
  background-color: var(--color-text-primary);
  vertical-align: middle;
  animation: blinkCursor 1s infinite;
}

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

/* --------------------------------------------------------------------------
   Mockup 3: Waymore Bento Full Card
   -------------------------------------------------------------------------- */
.project-waymore {
  grid-template-columns: 1fr 1fr;
}

.waymore-widgets {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  width: 100%;
}

.mini-widget {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 20px;
  box-shadow: var(--shadow-subtle);
  transition: transform var(--transition-fast);
}

.mini-widget:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.widget-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}

.widget-icon {
  font-size: 1.1rem;
}

.widget-name {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.widget-stat {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.widget-sub {
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
}

/* --------------------------------------------------------------------------
   Skills Section
   -------------------------------------------------------------------------- */
.skills-section {
  background-color: var(--color-bg-subtle);
}

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

.skill-group-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 36px 30px;
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.skill-group-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.featured-skill-group {
  border-color: var(--color-accent-border);
}

.skill-badge-top {
  position: absolute;
  top: -12px;
  left: 28px;
  background-color: var(--color-accent);
  color: #ffffff;
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.skill-group-header {
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
}

.skill-icon {
  color: var(--color-accent);
  flex-shrink: 0;
}

.skill-group-header h3 {
  font-size: 1.1875rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 4px;
  color: var(--color-text-primary);
}

.skill-group-desc {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.skill-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.skill-name-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  margin-bottom: 6px;
}

.skill-name {
  font-weight: 500;
  color: var(--color-text-primary);
}

.skill-level {
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  font-weight: 500;
}

.skill-meter {
  width: 100%;
  height: 5px;
  background-color: var(--color-bg-subtle);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.skill-meter span {
  display: block;
  height: 100%;
  background-color: var(--color-accent);
  border-radius: var(--radius-pill);
  transition: width 1s ease-in-out;
}

/* --------------------------------------------------------------------------
   Education Section
   -------------------------------------------------------------------------- */
.education-section {
  background-color: var(--color-bg);
}

.education-card {
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.edu-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
}

.edu-degree {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  color: var(--color-text-primary);
}

.edu-institution {
  font-size: 1.0625rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: 18px;
}

.edu-description {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.edu-highlights {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.highlight-pill {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 16px 20px;
  box-shadow: var(--shadow-subtle);
}

.highlight-title {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 4px;
}

.highlight-desc {
  font-size: 0.875rem;
  color: var(--color-text-primary);
  font-weight: 500;
}

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

.contact-card {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 64px 48px;
  text-align: center;
  max-width: 840px;
  margin: 0 auto;
  box-shadow: var(--shadow-card);
  position: relative;
}

.contact-header {
  margin-bottom: 40px;
}

.contact-title {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--color-text-primary);
  margin-bottom: 16px;
  line-height: 1.2;
}

.contact-subtitle {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  max-width: 580px;
  margin: 0 auto;
}

.contact-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.email-box {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 8px 10px 8px 24px;
  width: 100%;
  max-width: 440px;
}

.email-details {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.email-label {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.email-address {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.contact-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* Toast notification */
.toast {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background-color: var(--color-text-primary);
  color: #ffffff;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-normal);
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* --------------------------------------------------------------------------
   Footer (Apple Official Style)
   -------------------------------------------------------------------------- */
.footer {
  background-color: #ffffff;
  border-top: 1px solid var(--color-border);
  padding: 40px 0 60px 0;
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
}

.footer-container {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.footer-top {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 20px;
}

.footer-note {
  line-height: 1.6;
  max-width: 900px;
}

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

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

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

/* --------------------------------------------------------------------------
   Responsive Media Queries
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 3rem;
  }
  
  .about-grid,
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .featured-skill-group {
    grid-column: span 2;
  }

  .education-card {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .bento-card {
    grid-template-columns: 1fr;
  }

  .project-waymore {
    grid-template-columns: 1fr;
  }

  .waymore-widgets {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.25rem;
  }

  .hero-description {
    font-size: 1.0625rem;
  }

  .spec-strip {
    flex-direction: column;
    gap: 16px;
    border-radius: var(--radius-card);
    padding: 24px;
  }

  .spec-divider {
    width: 100%;
    height: 1px;
  }

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

  .featured-skill-group {
    grid-column: span 1;
  }

  .bento-content {
    padding: 32px 24px;
  }

  .bento-preview-wrap {
    padding: 24px;
  }

  .waymore-widgets {
    grid-template-columns: 1fr;
  }

  .contact-card {
    padding: 40px 24px;
  }

  .email-box {
    flex-direction: column;
    padding: 16px;
    border-radius: var(--radius-card);
    text-align: center;
  }

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

  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-150%);
    transition: transform var(--transition-normal);
  }

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

  .mobile-toggle {
    display: flex;
  }
}