/* ==========================================================================
   ALAN'S WEB RESUME - APPLE-INSPIRED DESIGN SYSTEM (UI/UX PRO MAX SPEC)
   Theme: Default Apple Light (Bright Editorial) + Dark Tech Mode Switcher
   ========================================================================== */

:root {
  /* Apple Light Theme (Default) */
  --bg-primary: #fbfbfd;
  --bg-secondary: #f5f5f7;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #fafafa;
  --bg-nav: rgba(251, 251, 253, 0.82);
  --border-subtle: #e5e5ea;
  --border-card: #e5e5ea;
  --border-hover: #d1d1d6;
  
  --accent-primary: #0071e3;
  --accent-emerald: #10b981;
  --accent-indigo: #6366f1;
  --accent-cyan: #0284c7;
  --accent-amber: #f59e0b;
  --accent-rose: #ef4444;

  --text-main: #1d1d1f;
  --text-body: #424245;
  --text-muted: #6e6e73;
  --text-dim: #86868b;

  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Icons", "Segoe UI", Roboto, sans-serif;
  --font-body: 'Noto Sans TC', 'Inter', -apple-system, BlinkMacSystemFont, "SF Pro Text", sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-card: 24px;
  --radius-pill: 9999px;

  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-card-hover: 0 12px 32px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 20px rgba(0, 113, 227, 0.15);
}

/* Dark Tech Theme */
html.dark {
  --bg-primary: #0b0f19;
  --bg-secondary: #0f172a;
  --bg-surface: #131b2e;
  --bg-card: rgba(19, 27, 46, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --bg-nav: rgba(11, 15, 25, 0.85);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-card: rgba(255, 255, 255, 0.1);
  --border-hover: rgba(99, 102, 241, 0.4);

  --accent-primary: #38bdf8;
  --accent-emerald: #34d399;
  --accent-indigo: #818cf8;
  --accent-cyan: #38bdf8;

  --text-main: #f8fafc;
  --text-body: #cbd5e1;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.4), 0 0 1px 1px rgba(255, 255, 255, 0.06);
  --shadow-card-hover: 0 16px 36px rgba(0, 0, 0, 0.6), 0 0 15px rgba(99, 102, 241, 0.25);
}

/* Base resets & typography */
html {
  scroll-behavior: smooth;
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-body);
  transition: background-color 0.3s ease, color 0.3s ease;
}

body {
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  background-color: var(--bg-primary);
  color: var(--text-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6, .font-heading {
  font-family: var(--font-heading);
  color: var(--text-main);
  letter-spacing: -0.025em;
}

.font-mono {
  font-family: var(--font-mono);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-hover);
  border-radius: 4px;
}

/* Apple-style Cards */
.apple-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1),
              box-shadow 0.35s cubic-bezier(0.2, 0.8, 0.2, 1),
              border-color 0.35s ease;
}

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

/* Glass Navbar */
.glass-navbar {
  background: var(--bg-nav);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background 0.3s ease, border-color 0.3s ease;
}

/* Badges */
.apple-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
}

.apple-badge-primary {
  background: rgba(0, 113, 227, 0.08);
  border-color: rgba(0, 113, 227, 0.2);
  color: #0071e3;
}
html.dark .apple-badge-primary {
  background: rgba(56, 189, 248, 0.15);
  border-color: rgba(56, 189, 248, 0.3);
  color: #38bdf8;
}

.apple-badge-emerald {
  background: rgba(16, 185, 129, 0.08);
  border-color: rgba(16, 185, 129, 0.2);
  color: #059669;
}
html.dark .apple-badge-emerald {
  background: rgba(52, 211, 153, 0.15);
  border-color: rgba(52, 211, 153, 0.3);
  color: #34d399;
}

/* Personality Tag Chips */
.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-body);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  transition: transform 0.2s cubic-bezier(0.2, 0.8, 0.2, 1),
              box-shadow 0.2s ease,
              border-color 0.2s ease,
              background 0.2s ease;
}

.tag-chip:hover {
  transform: translateY(-2px);
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card-hover);
}

/* Avatar Frame */
.avatar-frame {
  position: relative;
  border-radius: 9999px;
  padding: 3px;
  background: linear-gradient(135deg, #e5e5ea, #ffffff);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}
html.dark .avatar-frame {
  background: linear-gradient(135deg, #38bdf8, #818cf8);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

/* Timeline Layout */
.timeline-rail {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 20px;
  width: 2px;
  background: var(--border-subtle);
}
@media (min-width: 768px) {
  .timeline-rail {
    left: 50%;
    transform: translateX(-50%);
  }
}

.timeline-dot {
  width: 14px;
  height: 14px;
  border-radius: 9999px;
  background: var(--accent-emerald);
  border: 3px solid var(--bg-surface);
  box-shadow: 0 0 0 2px var(--border-subtle);
  position: relative;
  z-index: 10;
}

/* Lightbox Modal */
.lightbox-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.88);
  backdrop-filter: blur(20px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.lightbox-modal.active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 12px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
  transform: scale(0.96);
  transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.lightbox-modal.active .lightbox-img {
  transform: scale(1);
}

/* Toast */
.toast-msg {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--text-main);
  color: var(--bg-surface);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-pill);
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  z-index: 10000;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.toast-msg.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* Gallery Card */
.gallery-thumbnail {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-card);
  background: var(--bg-secondary);
  box-shadow: var(--shadow-card);
  transition: all 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.gallery-thumbnail:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--border-hover);
}

.gallery-thumbnail img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.gallery-thumbnail:hover img {
  transform: scale(1.05);
}

.gallery-hover-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(29, 29, 31, 0.85) 0%, rgba(29, 29, 31, 0.2) 60%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1rem;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.gallery-thumbnail:hover .gallery-hover-overlay {
  opacity: 1;
}