/* ═══════════════════════════════════════════════
   HenrysTV — Shared Design System
   Giao diện Cổ Xưa · Ancient Eastern Aesthetic
═══════════════════════════════════════════════ */

:root {
  --bg:      #080810;
  --bg2:     #0d0d18;
  --surface: #111120;
  --surface2:#1a1a2e;
  --surface3:#222238;
  --border:  #2c2c44;
  --border2: #3a3a58;
  --accent:  #c8a96e;
  --accent2: #8b6e45;
  --gold:    #e8c97a;
  --gold2:   #f5dfa0;
  --text:    #e2ddd6;
  --muted:   #7a7570;
  --muted2:  #5a5560;
  --red:     #c85050;
  --green:   #7db855;
  --ink:     #b0a898;
  --r: 6px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Georgia', 'Times New Roman', serif;
  font-size: 16px;
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; transition: color .2s; }
a:hover { color: var(--gold); }

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }

/* ─────────────────────────────────────────────
   NAVIGATION
───────────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 900;
  background: rgba(8,8,16,.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav::after {
  content: '';
  display: block;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent2), transparent);
  opacity: .4;
}
.nav-inner {
  max-width: 1100px; margin: 0 auto;
  padding: .7rem 1.5rem;
  display: flex; align-items: center; gap: 1.2rem;
}
.nav-logo {
  display: flex; align-items: center; gap: .5rem;
  color: var(--gold) !important;
  font-size: 1rem; letter-spacing: .12rem;
  font-style: normal; font-weight: normal;
  white-space: nowrap;
}
.nav-logo .nav-sigil {
  font-size: 1.2rem; color: var(--accent); opacity: .85;
}
.nav-links {
  display: flex; gap: 1.5rem; flex: 1;
  margin-left: .8rem;
}
.nav-links a {
  font-size: .82rem; letter-spacing: .08rem;
  color: var(--muted); transition: color .2s;
  text-transform: uppercase;
}
.nav-links a:hover { color: var(--accent); }
.nav-links a.active { color: var(--gold); }
.nav-auth { display: flex; gap: .6rem; align-items: center; }
.nav-btn {
  font-size: .78rem; letter-spacing: .1rem; text-transform: uppercase;
  padding: .3rem .9rem; border-radius: 2px;
  border: 1px solid var(--border2); color: var(--muted);
  transition: all .2s; white-space: nowrap;
}
.nav-btn:hover { border-color: var(--accent2); color: var(--accent) !important; }
.nav-btn-primary {
  border-color: var(--accent); color: var(--gold) !important;
}
.nav-btn-primary:hover { background: rgba(200,169,110,.1); }

/* Mobile nav */
.nav-mobile-toggle {
  display: none; background: transparent; border: none;
  color: var(--muted); font-size: 1.2rem; cursor: pointer;
  padding: .2rem .4rem; margin-left: auto;
}
.nav-mobile-menu {
  display: none; background: var(--surface); border-top: 1px solid var(--border);
  padding: 1rem 1.5rem; flex-direction: column; gap: .8rem;
}
.nav-mobile-menu.open { display: flex; }
.nav-mobile-menu a { color: var(--muted); font-size: .85rem; letter-spacing: .05rem; padding: .3rem 0; }
.nav-mobile-menu a:hover { color: var(--accent); }

@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-mobile-toggle { display: block; }
  .nav-auth .nav-btn { font-size: .72rem; padding: .25rem .65rem; }
}

/* ─────────────────────────────────────────────
   PAGE WRAPPER
───────────────────────────────────────────── */
.page-top { padding-top: 56px; }

/* ─────────────────────────────────────────────
   BUTTONS
───────────────────────────────────────────── */
.btn-primary {
  display: inline-block;
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--gold);
  padding: .85rem 2.2rem;
  font-family: inherit; font-size: .95rem;
  letter-spacing: .2rem; text-transform: uppercase;
  cursor: pointer; border-radius: 2px;
  transition: all .25s;
}
.btn-primary:hover {
  background: rgba(200,169,110,.12);
  box-shadow: 0 0 24px rgba(200,169,110,.15);
  color: var(--gold2) !important;
}
.btn-ghost {
  display: inline-block;
  background: transparent;
  border: 1px solid var(--border2);
  color: var(--muted); padding: .85rem 2rem;
  font-family: inherit; font-size: .9rem;
  letter-spacing: .12rem; text-transform: uppercase;
  cursor: pointer; border-radius: 2px; transition: all .25s;
}
.btn-ghost:hover { border-color: var(--accent2); color: var(--accent) !important; }

/* ─────────────────────────────────────────────
   SECTIONS
───────────────────────────────────────────── */
.section { padding: 5rem 0; }
.section-alt { background: var(--bg2); }
.container { max-width: 1080px; margin: 0 auto; padding: 0 1.5rem; }
.section-label {
  font-size: .68rem; letter-spacing: .25rem; text-transform: uppercase;
  color: var(--accent); margin-bottom: .6rem;
  display: flex; align-items: center; gap: .7rem;
}
.section-label::before, .section-label::after {
  content: ''; flex: none; width: 24px; height: 1px; background: var(--accent2); opacity: .6;
}
.section-label::before { display: none; }
.section-title {
  font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: normal;
  color: var(--gold); letter-spacing: .06rem; margin-bottom: 2.5rem;
  line-height: 1.35;
}

/* ─────────────────────────────────────────────
   FORMS
───────────────────────────────────────────── */
.form-field { margin-bottom: 1rem; }
.form-field label {
  display: block; font-size: .68rem; letter-spacing: .12rem;
  text-transform: uppercase; color: var(--muted); margin-bottom: .35rem;
}
.form-field input, .form-field textarea, .form-field select {
  width: 100%; background: var(--surface2); border: 1px solid var(--border);
  color: var(--text); padding: .7rem .95rem;
  font-family: inherit; font-size: .95rem; border-radius: 2px;
  outline: none; transition: border-color .2s;
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus {
  border-color: var(--accent2);
}
.form-field input::placeholder, .form-field textarea::placeholder {
  color: var(--muted2); font-style: italic;
}

/* ─────────────────────────────────────────────
   FOOTER
───────────────────────────────────────────── */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 3rem 0 0;
}
.footer::before {
  content: '';
  display: block;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--accent2) 30%, var(--accent) 50%, var(--accent2) 70%, transparent 100%);
  margin-bottom: 3rem;
  opacity: .5;
}
.footer-inner {
  max-width: 1080px; margin: 0 auto; padding: 0 1.5rem;
  display: grid; grid-template-columns: 1.4fr 1fr;
  gap: 3rem; margin-bottom: 3rem;
}
@media (max-width: 640px) { .footer-inner { grid-template-columns: 1fr; } }

.footer-brand .footer-logo {
  font-size: 1.1rem; color: var(--gold); letter-spacing: .15rem;
  margin-bottom: .7rem;
}
.footer-brand p { font-size: .82rem; color: var(--muted); line-height: 1.7; }
.footer-links { display: flex; gap: 2rem; }
.footer-col h4 {
  font-size: .65rem; letter-spacing: .2rem; text-transform: uppercase;
  color: var(--accent); margin-bottom: .9rem; font-weight: normal;
}
.footer-col { display: flex; flex-direction: column; gap: .5rem; }
.footer-col a { font-size: .82rem; color: var(--muted); transition: color .2s; }
.footer-col a:hover { color: var(--accent); }

.footer-bottom {
  border-top: 1px solid var(--border); padding: 1.2rem 1.5rem;
  max-width: 1080px; margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: .8rem;
  font-size: .75rem; color: var(--muted2);
}
.footer-sigil {
  letter-spacing: .3rem; color: var(--accent2); opacity: .5; font-size: .8rem;
}

/* ─────────────────────────────────────────────
   DECORATIVE
───────────────────────────────────────────── */
.divider-ornate {
  display: flex; align-items: center; gap: 1rem;
  margin: 2rem 0; color: var(--accent2); opacity: .5;
  font-size: .8rem; letter-spacing: .3rem;
}
.divider-ornate::before, .divider-ornate::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}

/* Ink brush horizontal rule */
hr.ink { border: none; border-top: 1px solid var(--border); margin: 2rem 0; opacity: .6; }

/* Glow text */
.glow-gold { color: var(--gold); text-shadow: 0 0 30px rgba(232,201,122,.25); }

/* ─────────────────────────────────────────────
   UTILITIES
───────────────────────────────────────────── */
.text-center { text-align: center; }
.text-muted   { color: var(--muted); }
.text-gold    { color: var(--gold); }
.text-accent  { color: var(--accent); }
.mt-1  { margin-top: .5rem; }
.mt-2  { margin-top: 1rem; }
.mt-3  { margin-top: 1.5rem; }
.mt-4  { margin-top: 2rem; }
.fade-in { animation: fadeInUp .6s ease both; }
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─────────────────────────────────────────────
   SCROLL-TO-TOP BUTTON
───────────────────────────────────────────── */
#scrollTopBtn {
  position: fixed;
  bottom: 1.8rem;
  right: 1.8rem;
  width: 40px; height: 40px;
  background: var(--surface2);
  border: 1px solid var(--accent2);
  color: var(--accent);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  border-radius: 2px;
  display: flex; align-items: center; justify-content: center;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .3s ease, transform .3s ease, background .2s, border-color .2s, color .2s;
  z-index: 800;
  pointer-events: none;
  box-shadow: 0 2px 12px rgba(0,0,0,.4);
}
#scrollTopBtn.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
#scrollTopBtn:hover {
  background: rgba(200,169,110,.14);
  border-color: var(--accent);
  color: var(--gold);
}
/* Studio has the library FAB at bottom-right — push scroll btn above it */
.has-lib-fab #scrollTopBtn {
  bottom: 5.2rem;
}