/* ═══════════════════════════════════════════════════════════════
   JAMES IDENTITY — theme.css
   Luxury Zen Design System
   Palette: #F4F1EA · #3E2723 · #C5A880
   ═══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=EB+Garamond:ital,wght@0,400;0,500;1,400;1,500&display=swap');

/* ─────────────────────────────────────────────
   1. DESIGN TOKENS
───────────────────────────────────────────── */
:root {
  /* Core palette */
  --color-bg:       #F4F1EA;
  --color-heading:  #3E2723;
  --color-accent:   #C5A880;
  --color-text:     #2B2B2B;
  --color-muted:    #A8A39D;

  /* Derived surfaces */
  --color-card-bg:        rgba(253, 250, 244, 0.52);
  --color-border-soft:    rgba(62, 39, 35, 0.08);
  --color-border-gold:    rgba(197, 168, 128, 0.38);
  --color-border-gold-hi: rgba(197, 168, 128, 0.70);
  --color-accent-tint:    rgba(197, 168, 128, 0.07);
  --color-accent-border:  rgba(197, 168, 128, 0.20);

  /* Typography */
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans:  'Inter', system-ui, sans-serif;
  --font-text:  'EB Garamond', Georgia, serif;   /* main reading / body text */
  --font-mono:  'Courier New', Courier, monospace;

  /* Zen easing curves — no jank, no bounce */
  --ease-zen:  cubic-bezier(0.22, 1, 0.36, 1);   /* power4.out */
  --ease-out:  cubic-bezier(0.16, 1, 0.30, 1);   /* expo.out   */
  --ease-soft: cubic-bezier(0.22, 1, 0.36, 1);   /* power4.out */

  /* Duration */
  --dur-fast:   0.25s;
  --dur-base:   0.40s;
  --dur-slow:   0.70s;
  --dur-reveal: 0.80s;
}

/* ─────────────────────────────────────────────
   2. RESET & BASE
───────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-text);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  position: relative;
  min-height: 100%;
}

/* ─────────────────────────────────────────────
   3. FIXED NAVIGATION — identical on all pages
───────────────────────────────────────────── */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(244, 241, 234, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-soft);
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  letter-spacing: 0.02em;
  color: var(--color-heading);
  text-decoration: none;
  transition: opacity var(--dur-base) ease;
}
.nav-logo:hover { opacity: 0.70; }

.nav-link {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-muted);
  text-decoration: none;
  position: relative;
  padding-bottom: 2px;
  transition: color var(--dur-base) ease;
}
.nav-link:hover    { color: var(--color-heading); }

/* Active page indicator */
.nav-link--active { color: var(--color-heading); }
.nav-link--active::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0; right: 0;
  height: 1px;
  background: var(--color-accent);
  opacity: 0.65;
}

/* ─────────────────────────────────────────────
   3b. HEADING SHARP RENDER
───────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  text-rendering: optimizeLegibility !important;
  -webkit-font-smoothing: subpixel-antialiased !important;
  -moz-osx-font-smoothing: auto !important;
  text-shadow: 0 0 0.5px rgba(62, 39, 35, 0.1);
}

/* ─────────────────────────────────────────────
   4. SITE FOOTER — identical on all pages
───────────────────────────────────────────── */
.site-footer {
  padding: 4rem 1.5rem;
  border-top: 1px solid var(--color-border-soft);
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  letter-spacing: 0.02em;
  color: var(--color-heading);
  text-decoration: none;
  transition: opacity var(--dur-base) ease;
}
.footer-logo:hover { opacity: 0.70; }

.footer-copy {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--color-muted);
}

/* Footer contact links */
.footer-connect-title {
  font-family: var(--font-serif);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-muted);
  text-align: center;
  margin-bottom: 0.75rem;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.footer-contact-link {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--color-muted);
  transition: color 0.25s ease, filter 0.25s ease;
}

.footer-contact-link svg {
  width: 1.1rem;
  height: 1.1rem;
  flex-shrink: 0;
  transition: filter 0.25s ease;
}

.footer-contact-link:hover {
  color: var(--color-accent);
  filter: drop-shadow(0 0 6px rgba(197, 168, 128, 0.55));
}

.footer-contact-link:hover svg {
  filter: drop-shadow(0 0 6px rgba(197, 168, 128, 0.55));
}

/* Telegram — "The Signal": vàng đồng đậm, nổi hơn các icon khác */
.footer-contact-link--telegram:hover {
  color: #C9943A;
  filter: drop-shadow(0 0 9px rgba(201, 148, 58, 0.75));
}
.footer-contact-link--telegram:hover svg {
  filter: drop-shadow(0 0 9px rgba(201, 148, 58, 0.75));
}

/* ─────────────────────────────────────────────
   5. GLASSMORPHISM CARD
───────────────────────────────────────────── */
.card {
  background: var(--color-card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--color-border-gold);
  border-radius: 1rem;
  transform: translateZ(0);
  transition:
    transform var(--dur-base) var(--ease-zen),
    box-shadow var(--dur-base) var(--ease-zen),
    border-color var(--dur-base) ease;
  will-change: transform;
}
.card:hover {
  transform: translateY(-7px) translateZ(0);
  box-shadow: 0 22px 60px rgba(62, 39, 35, 0.09);
  border-color: var(--color-border-gold-hi);
}

/* ─────────────────────────────────────────────
   6. CTA BUTTON
───────────────────────────────────────────── */
.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 14px 44px;
  border: 1px solid var(--color-heading);
  color: var(--color-heading);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  background: transparent;
  cursor: pointer;
  transition:
    background-color var(--dur-base) ease,
    color var(--dur-base) ease,
    transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275),
    box-shadow 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.btn-cta:hover {
  background-color: var(--color-heading);
  color: var(--color-bg);
  transform: scale(1.08) translateY(-2px);
  box-shadow: 0 10px 20px rgba(197, 168, 128, 0.2);
}
.btn-cta:active {
  transform: scale(0.95);
  box-shadow: none;
}

/* ─────────────────────────────────────────────
   7. SCROLL-REVEAL — initial hidden state
      GSAP animates from this state to visible.
───────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
}

/* ─────────────────────────────────────────────
   8. INTRO QUOTE
───────────────────────────────────────────── */
.intro-quote {
  border-left: 2px solid var(--color-accent);
  padding-left: 2rem;
}

/* ─────────────────────────────────────────────
   9. PHILOSOPHY LIST
───────────────────────────────────────────── */
.phi-item {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--color-border-soft);
}
.phi-item:first-child {
  border-top: 1px solid var(--color-border-soft);
}

.phi-formula {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.35rem 0.9rem;
  background: var(--color-accent-tint);
  border: 1px solid var(--color-accent-border);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-accent);
  letter-spacing: 0.08em;
}

/* ─────────────────────────────────────────────
   10. AUDIENCE TABS
───────────────────────────────────────────── */
.group-tab {
  padding: 0.45rem 1.1rem;
  border: 1px solid rgba(197, 168, 128, 0.35);
  background: transparent;
  color: var(--color-muted);
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition:
    border-color var(--dur-base) ease,
    color var(--dur-base) ease,
    background-color var(--dur-base) ease;
}
.group-tab:hover {
  border-color: var(--color-accent);
  color: var(--color-heading);
}
.group-tab.active {
  background: var(--color-heading);
  border-color: var(--color-heading);
  color: var(--color-bg);
}

/* ─────────────────────────────────────────────
   11. GROUP PANELS (audience section)
───────────────────────────────────────────── */
.group-panel { display: none; }

.group-panel.active {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  animation: zenFadeUp var(--dur-slow) var(--ease-out) both;
}

/* ─────────────────────────────────────────────
   12. AWARENESS BAR
───────────────────────────────────────────── */
.awareness-track {
  height: 2px;
  background: var(--color-border-soft);
  border-radius: 999px;
  overflow: hidden;
}
.awareness-fill {
  height: 100%;
  background: linear-gradient(
    90deg,
    rgba(197, 168, 128, 0.45),
    var(--color-accent)
  );
  border-radius: 999px;
}

/* ─────────────────────────────────────────────
   13. DIAGNOSIS BLOCK
───────────────────────────────────────────── */
.diagnosis-block {
  padding: 1.25rem 1.5rem;
  background: var(--color-accent-tint);
  border: 1px solid var(--color-accent-border);
}

/* ─────────────────────────────────────────────
   14. BACKGROUND GRID — Diamond Grid, applied to
       all pages. Dark sections overlay it.
───────────────────────────────────────────── */
body::before {
  content: '';
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(
      45deg,
      rgba(220, 100, 140, 0.05) 0px, rgba(220, 100, 140, 0.05) 1px,
      transparent 1px, transparent 60px
    ),
    repeating-linear-gradient(
      -45deg,
      rgba(220, 100, 140, 0.05) 0px, rgba(220, 100, 140, 0.05) 1px,
      transparent 1px, transparent 60px
    );
  background-size: 60px 60px;
}

/* ─────────────────────────────────────────────
   15. LIGHT BEAMS — Chạy dọc đường lưới
───────────────────────────────────────────── */
#page-beams {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
  will-change: transform;
}
.pg-beam {
  position: absolute;
  width: 1px;
  height: 300%;
  left: 50%;
  background: linear-gradient(
    to bottom,
    transparent 0%,
    rgba(197, 168, 128, 0.16) 32%,
    rgba(197, 168, 128, 0.26) 50%,
    rgba(197, 168, 128, 0.16) 68%,
    transparent 100%
  );
  transform-origin: 50% 0;
  filter: blur(1px);
  opacity: 0;
}
@keyframes beamFlow {
  0%   { transform: rotate(45deg) translateX(-130vw); opacity: 0; }
  8%   { opacity: 1; }
  92%  { opacity: 1; }
  100% { transform: rotate(45deg) translateX(130vw);  opacity: 0; }
}
.pg-beam:nth-child(1) { animation: beamFlow 22s linear infinite;        top: 15%; }
.pg-beam:nth-child(2) { animation: beamFlow 28s linear infinite;        top: 42%; animation-delay: -9s;  }
.pg-beam:nth-child(3) { animation: beamFlow 18s linear infinite;        top: 66%; animation-delay: -15s; }
.pg-beam:nth-child(4) { animation: beamFlow 24s linear infinite;        top: 28%; animation-delay: -5s;  }
.pg-beam:nth-child(5) { animation: beamFlow 32s linear infinite;        top: 80%; animation-delay: -21s; }

/* ─────────────────────────────────────────────
   16. KEYFRAMES — Zen quality, no jank
───────────────────────────────────────────── */

/* Panel switch fade-up */
@keyframes zenFadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0);    }
}

/* ─────────────────────────────────────────────
   15. RESPONSIVE
───────────────────────────────────────────── */
@media (max-width: 768px) {
  .group-panel.active {
    grid-template-columns: 1fr;
  }
  .phi-grid {
    grid-template-columns: 1fr !important;
    gap: 0.5rem !important;
  }

  /* ── NAV MOBILE ── */
  .nav-desktop { display: none; }
  .site-nav > div {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }
  .nav-logo {
    flex-shrink: 0;
    font-size: 1.05rem;
  }
  .site-nav nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
  }
  .nav-link {
    font-size: 12px;
    letter-spacing: 0.08em;
  }

  .site-footer {
    padding: 3rem 1.25rem;
  }

  /* body::before đã là absolute toàn cục — không cần override */
}