/* ═══════════════════════════════════════════════════
   DESIGN UPGRADE — Editorial Architecture System
   Based on DESIGN.md: "The Monolith & The Void"
   Load AFTER style.css — all rules override base styles
   ═══════════════════════════════════════════════════ */

/* ── GOOGLE FONTS (loaded via HTML <link>) ──
   Newsreader: Display/Titles (serif, classical)
   Manrope:    Body text (sans-serif, modern)
   Space Grotesk: Labels/metadata (technical)
   ─────────────────────────────────────────── */

/* ══════════════════════════════════════
   1. COLOR PALETTE — Warm Neutrals
   ══════════════════════════════════════ */
:root {
  --ink: #1d1c17;
  --paper: #fef9f1;
  --rust: #983514;
  --warm: #d4a96a;
  --muted: #8a7f72;
  --light: #f2ede5;
  --dark: #1a1612;
  --accent: #B84C2A;
  --surface-low: #f7f2ea;
  --surface-high: #ebe6de;
  --on-primary: #ffeeea;
  --shadow-tint: rgba(29, 28, 23, 0.06);
}

/* ══════════════════════════════════════
   2. GLOBAL RESET — 0px Border Radius
   ══════════════════════════════════════ */
*,
*::before,
*::after {
  border-radius: 0 !important;
}

/* Exceptions: cursor dots remain circular */
.cursor,
.cursor-ring,
#cursorBlend,
.theme-dot,
.clock-dot,
.chat-status-dot {
  border-radius: 50% !important;
}

body {
  font-family: 'Manrope', system-ui, -apple-system, sans-serif;
  background: var(--paper);
  color: var(--ink);
  transition: background 0.4s ease, color 0.4s ease;
}

/* Vietnamese version */
body.lang-vi {
  font-family: 'Manrope', 'Be Vietnam Pro', system-ui, sans-serif;
}

/* ══════════════════════════════════════
   3. TYPOGRAPHY — Structural Hierarchy
   ══════════════════════════════════════ */

/* Display — Newsreader (serif, classical) */
.hero-name,
.hero-bg-text,
.stat-num,
.section-title,
.footer-name,
.loader-svg text,
h1, h2 {
  font-family: 'Newsreader', 'Cormorant Garamond', Georgia, serif;
}

/* Label/Meta — Space Grotesk (technical, blueprint) */
.hero-label,
.hero-meta,
.hero-contact-list,
.hero-portrait-placeholder,
.hero-role,
.nav-links a,
.nav-lang,
.nav-logo,
.scroll-cue,
.stat-label,
.section-num,
.section-watermark,
.skill-name,
.skill-pct,
.tag,
.timeline-year,
.act-meta,
.project-card-label,
.rp-label,
.rp-meta,
.photo-caption,
.footer-greeting,
.footer-clock,
.footer-copy,
.contact-link .cl-label,
.contact-link .cl-value,
.cf-label,
.cf-submit,
.btn-cv,
.loader-sub,
.cfi-link,
.btn-view-cv,
label,
.float-label span,
#cad-coords,
#scale-ruler {
  font-family: 'Space Grotesk', 'DM Mono', monospace;
}

/* Body — Manrope (clean, functional) */
.hero-tagline,
.about-text,
.about-bio,
.act-desc,
.project-card-desc,
.rp-desc,
.footer-bio,
.contact-form-info p,
p {
  font-family: 'Manrope', system-ui, sans-serif;
}

/* ══════════════════════════════════════
   4. NAV — Glassmorphism
   ══════════════════════════════════════ */
nav {
  background: rgba(254, 249, 241, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(29, 28, 23, 0.04);
}

nav.nav-dark {
  background: rgba(26, 22, 18, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.nav-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  letter-spacing: 0.08em;
}

/* ══════════════════════════════════════
   5. HERO — Monolith Typography
   ══════════════════════════════════════ */
.hero-name {
  font-family: 'Newsreader', Georgia, serif;
  font-size: clamp(3.5rem, 7vw, 7rem);
  font-weight: 400;
  font-style: italic;
  line-height: 0.95;
  letter-spacing: -0.02em;
}

.hero-tagline {
  font-family: 'Manrope', sans-serif;
  font-weight: 300;
  font-style: normal;
  line-height: 1.8;
}

.hero-left {
  padding: 10rem 4rem 6rem;
}

.hero-right-content {
  padding: 8rem 4rem 5rem;
}

.hero-school {
  font-family: 'Newsreader', serif;
  font-weight: 300;
  font-style: italic;
}

.hero-role {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 500;
}

/* ══════════════════════════════════════
   6. BUTTONS — Structural Block
   ══════════════════════════════════════ */
.btn-cv {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.9rem 1.8rem;
  background: linear-gradient(135deg, var(--rust), var(--accent));
  border: none;
  color: var(--on-primary);
  transition: all 0.3s ease;
}

.btn-cv:hover {
  background: transparent;
  outline: 2px solid var(--rust);
  color: var(--rust);
}

/* Tertiary button — text + underline */
.nav-lang {
  font-family: 'Space Grotesk', sans-serif;
  border: none;
  border-bottom: 2px solid var(--rust);
  padding: 0.3rem 0;
  transition: border-width 0.3s ease;
}

.nav-lang:hover {
  border-bottom-width: 3px;
  border-color: var(--rust);
}

/* ══════════════════════════════════════
   7. SECTIONS — Extreme Vertical Spacing
   ══════════════════════════════════════ */
section {
  padding: 9rem 4rem;
}

.section-title {
  font-family: 'Newsreader', serif;
  font-weight: 400;
  font-style: italic;
  letter-spacing: -0.01em;
}

.section-num {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 300;
}

/* No-Line Rule: remove borders between sections */
section + section {
  border-top: none;
}

/* ══════════════════════════════════════
   8. CARDS — Gallery Plate
   ══════════════════════════════════════ */
.activity-card {
  background: var(--surface-low);
  border: none;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

.project-card {
  border: none;
}

.project-card-thumb,
.rp-thumb {
  overflow: hidden;
}

.project-card-thumb img,
.rp-thumb img {
  transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.project-card:hover .project-card-thumb img,
.project-card:hover .rp-thumb img {
  transform: scale(1.05);
}

/* ══════════════════════════════════════
   9. INPUT FIELDS — Technical Draft
   ══════════════════════════════════════ */
.cf-input,
.cf-textarea {
  border: none;
  border-bottom: 1px solid rgba(29, 28, 23, 0.15);
  background: transparent;
  font-family: 'Manrope', sans-serif;
  transition: border-color 0.3s ease;
}

.cf-input:focus,
.cf-textarea:focus {
  border-bottom-color: var(--rust);
  outline: none;
}

.cf-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.cf-submit {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 500;
  letter-spacing: 0.12em;
  background: linear-gradient(135deg, var(--rust), var(--accent));
  border: none;
  color: var(--on-primary);
}

/* ══════════════════════════════════════
   10. STATS BAR
   ══════════════════════════════════════ */
.stats-bar {
  background: linear-gradient(135deg, var(--rust), var(--accent));
  padding: 3.5rem 4rem;
}

.stat-num {
  font-family: 'Newsreader', serif;
  font-weight: 400;
  letter-spacing: -0.02em;
}

.stat-label {
  font-family: 'Space Grotesk', sans-serif;
}

/* ══════════════════════════════════════
   11. FOOTER
   ══════════════════════════════════════ */
.footer-name {
  font-family: 'Newsreader', serif;
  font-style: italic;
}

.footer-greeting {
  font-family: 'Newsreader', serif;
  font-style: italic;
}

.footer-bio {
  font-family: 'Manrope', sans-serif;
  line-height: 1.8;
}

.footer-copy {
  font-family: 'Space Grotesk', sans-serif;
}

.contact-link {
  border: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.3s ease;
}

.contact-link:hover {
  background: rgba(255, 255, 255, 0.04);
}

/* ══════════════════════════════════════
   12. ELEVATION — Tonal Layering
   ══════════════════════════════════════ */

/* Lightbox ambient shadow (only exception) */
.lightbox-img-wrap {
  box-shadow: 0 20px 80px var(--shadow-tint);
}

/* Ghost borders for interactive elements */
.theme-toggle {
  border: 1px solid rgba(29, 28, 23, 0.08);
  background: rgba(254, 249, 241, 0.5);
}

nav.nav-dark .theme-toggle {
  border-color: rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
}

/* ══════════════════════════════════════
   13. ABOUT SECTION
   ══════════════════════════════════════ */
.about-block h3 {
  font-family: 'Newsreader', serif;
  font-style: italic;
  font-weight: 400;
}

.about-text,
.about-bio {
  font-family: 'Manrope', sans-serif;
  line-height: 1.9;
  text-align: left;
}

.skill-name {
  font-family: 'Space Grotesk', sans-serif;
}

.skill-fill {
  background: var(--rust);
}

.tag {
  font-family: 'Space Grotesk', sans-serif;
  border-color: rgba(29, 28, 23, 0.15);
  color: var(--muted);
}

/* ══════════════════════════════════════
   14. PROJECTS
   ══════════════════════════════════════ */
#projects {
  padding: 9rem 4rem;
}

.project-card-label,
.rp-label {
  font-family: 'Space Grotesk', sans-serif;
}

.project-card-title,
.recent-title {
  font-family: 'Newsreader', serif;
  font-weight: 400;
  font-style: italic;
}

.project-card-desc,
.rp-desc {
  font-family: 'Manrope', sans-serif;
  line-height: 1.8;
  text-align: left;
}

.rp-meta {
  font-family: 'Space Grotesk', sans-serif;
}

/* ══════════════════════════════════════
   15. CHAT POPUP
   ══════════════════════════════════════ */
.chat-header-name {
  font-family: 'Newsreader', serif;
  font-style: italic;
}

.chat-header-status {
  font-family: 'Space Grotesk', sans-serif;
}

.chat-bubble {
  font-family: 'Manrope', sans-serif;
}

.chat-cta-btn {
  font-family: 'Space Grotesk', sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ══════════════════════════════════════
   16. AI SECTION
   ══════════════════════════════════════ */
.ai-section {
  background: linear-gradient(135deg, var(--rust), #3a1f12);
}

.ai-title {
  font-family: 'Newsreader', serif;
  font-style: italic;
}

.ai-text {
  font-family: 'Manrope', sans-serif;
  line-height: 1.8;
}

/* ══════════════════════════════════════
   17. TIMELINE
   ══════════════════════════════════════ */
.timeline-year {
  font-family: 'Space Grotesk', sans-serif;
}

.timeline-title {
  font-family: 'Newsreader', serif;
  font-style: italic;
}

.timeline-desc {
  font-family: 'Manrope', sans-serif;
  line-height: 1.8;
}

/* ══════════════════════════════════════
   18. LOADER
   ══════════════════════════════════════ */
.loader-svg text {
  font-family: 'Newsreader', serif;
}

.loader-sub {
  font-family: 'Space Grotesk', sans-serif;
}

.dl-r {
  stroke: var(--rust);
}

.dl-w {
  stroke: var(--paper);
}

/* ══════════════════════════════════════
   19. SCROLL PROGRESS
   ══════════════════════════════════════ */
#scroll-progress {
  background: var(--rust);
}

/* ══════════════════════════════════════
   20. PHOTOGRAPHY / HOBBIES
   ══════════════════════════════════════ */
.photo-item {
  overflow: hidden;
}

.photo-item img {
  transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.photo-item:hover img {
  transform: scale(1.05);
}

.photo-caption {
  font-family: 'Space Grotesk', sans-serif;
}

/* ══════════════════════════════════════
   21. THEME OVERRIDES (dark, blueprint, mono)
   ══════════════════════════════════════ */

/* Dark theme */
body.theme-dark {
  --ink: #fef9f1;
  --paper: #0e0c0a;
  --rust: #c4652a;
  --accent: #d47a3a;
  --muted: #7a7068;
  --light: #1e1a16;
  --dark: #050403;
  --surface-low: #161210;
  --surface-high: #1e1a16;
  --on-primary: #ffeeea;
  --shadow-tint: rgba(0, 0, 0, 0.3);
}

body.theme-dark nav {
  background: rgba(14, 12, 10, 0.8);
  backdrop-filter: blur(20px);
}

/* Blueprint theme */
body.theme-blueprint {
  --surface-low: #0d2137;
  --surface-high: #112a45;
  --on-primary: #e0f4ff;
  --shadow-tint: rgba(0, 0, 0, 0.4);
}

body.theme-blueprint nav {
  background: rgba(10, 25, 41, 0.8);
  backdrop-filter: blur(20px);
}

body.theme-blueprint .stats-bar {
  background: linear-gradient(135deg, #00bcd4, #0097a7);
}

body.theme-blueprint .ai-section {
  background: linear-gradient(135deg, #00838f, #006064);
}

body.theme-blueprint .cf-submit {
  background: linear-gradient(135deg, #00bcd4, #0097a7);
}

body.theme-blueprint .btn-cv {
  background: linear-gradient(135deg, #00bcd4, #0097a7);
}

/* Mono theme */
body.theme-mono {
  --surface-low: #f5f5f5;
  --surface-high: #e8e8e8;
  --on-primary: #fff;
  --shadow-tint: rgba(0, 0, 0, 0.08);
}

body.theme-mono nav {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
}

body.theme-mono .stats-bar {
  background: linear-gradient(135deg, #111, #333);
}

body.theme-mono .btn-cv {
  background: linear-gradient(135deg, #111, #333);
}

body.theme-mono .cf-submit {
  background: linear-gradient(135deg, #111, #333);
}

/* ══════════════════════════════════════
   22. DARK MODE AUTO-DETECT
   ══════════════════════════════════════ */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme-set]) {
    --ink: #fef9f1;
    --paper: #0e0c0a;
    --rust: #c4652a;
    --accent: #d47a3a;
    --muted: #7a7068;
    --light: #1e1a16;
    --dark: #050403;
    --surface-low: #161210;
    --surface-high: #1e1a16;
  }
}

/* ══════════════════════════════════════
   23. PRINT STYLESHEET
   ══════════════════════════════════════ */
@media print {
  * {
    border-radius: 0 !important;
  }

  nav,
  .cursor,
  .cursor-ring,
  #cursorBlend,
  .cursor-label,
  #scroll-progress,
  #back-top,
  #page-wipe,
  #chat-popup,
  #chat-btn,
  .theme-toggle,
  .scroll-cue,
  .loader,
  #loader {
    display: none !important;
  }

  body {
    font-family: 'Newsreader', Georgia, serif;
    background: white !important;
    color: #1d1c17 !important;
    cursor: auto !important;
  }

  section {
    padding: 2rem 0;
    page-break-inside: avoid;
  }

  .hero {
    min-height: auto;
    display: block;
  }

  .hero-right {
    display: none;
  }
}

/* ══════════════════════════════════════
   24. REDUCED MOTION
   ══════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ══════════════════════════════════════
   25. RESPONSIVE — Mobile adjustments
   ══════════════════════════════════════ */
@media (max-width: 768px) {
  section {
    padding: 5rem 1.5rem;
  }

  .hero-left {
    padding: 6rem 1.5rem 3rem;
  }

  .hero-name {
    font-size: clamp(2.5rem, 10vw, 4rem);
  }

  nav {
    padding: 1rem 1.5rem;
  }

  .stats-bar {
    padding: 2rem 1.5rem;
  }
}

/* ══════════════════════════════════════
   FIX: Ensure chat-close, lightbox buttons
   are hidden when parent is not active
   ══════════════════════════════════════ */
#chat-popup:not(.open) .chat-close {
  display: none !important;
}

.lightbox:not(.active) .lightbox-close,
.lightbox:not(.active) .lightbox-nav {
  display: none !important;
}

/* ══════════════════════════════════════
   26. GOOGLE SIGN-IN (Nav)
   ══════════════════════════════════════ */
.gsi-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: 0.5rem;
  padding-left: 0.8rem;
  border-left: 1px solid rgba(29, 28, 23, 0.1);
}

nav.nav-dark .gsi-nav {
  border-left-color: rgba(255, 255, 255, 0.1);
}

.gsi-visitor-name {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--rust);
  white-space: nowrap;
}

nav.nav-dark .gsi-visitor-name {
  color: var(--warm);
}

.gsi-signin-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  padding: 0.3rem 0.7rem;
  border: 1px solid rgba(29, 28, 23, 0.15);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  cursor: pointer;
  white-space: nowrap;
}

.gsi-google-icon {
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.gsi-signin-btn:hover {
  color: var(--rust);
  border-color: var(--rust);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(152, 53, 20, 0.15);
}

.gsi-signin-btn:hover .gsi-google-icon {
  transform: scale(1.15);
}

nav.nav-dark .gsi-signin-btn {
  color: rgba(255, 255, 255, 0.5);
  border-color: rgba(255, 255, 255, 0.15);
}

nav.nav-dark .gsi-signin-btn:hover {
  color: white;
  border-color: white;
  box-shadow: 0 4px 12px rgba(255, 255, 255, 0.1);
}

.gsi-signout-btn {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.85rem;
  font-weight: 300;
  color: var(--muted);
  text-decoration: none;
  opacity: 0.4;
  transition: all 0.2s ease;
  cursor: pointer;
  line-height: 1;
}

.gsi-signout-btn:hover {
  opacity: 1;
  color: var(--rust);
  transform: scale(1.2);
}

.gsi-visitor-name {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--rust);
  white-space: nowrap;
  animation: gsiNameFadeIn 0.6s ease forwards;
}

@keyframes gsiNameFadeIn {
  from { opacity: 0; transform: translateX(8px); }
  to { opacity: 1; transform: translateX(0); }
}

nav.nav-dark .gsi-visitor-name {
  color: var(--warm);
}

#time-greeting {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--rust);
  margin-bottom: 0.5rem;
}

/* Hide GSI nav on mobile */
@media (max-width: 768px) {
  .gsi-nav {
    display: none;
  }
}