@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@300;400;500;600;700&family=Noto+Serif:ital,wght@0,400;0,700;1,400&display=swap');

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

:root {
  --bg:          #0d0f18;
  --bg-card:     #151929;
  --bg-card-h:   #1c2135;
  --gold:        #d4a843;
  --gold-l:      #f0c96a;
  --red:         #c0392b;
  --red-l:       #e74c3c;
  --text:        #e8e4d8;
  --text-sec:    #8a95a8;
  --border:      #252d42;
  --radius:      12px;
  --shadow:      0 4px 24px rgba(0,0,0,.45);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Be Vietnam Pro', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--gold); }

/* ── Header ───────────────────────────────────────────────── */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(13,15,24,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}

.header-logo {
  font-weight: 700; font-size: 1.1rem;
  background: linear-gradient(135deg, var(--gold), var(--gold-l));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-nav { display: flex; align-items: center; gap: .75rem; }

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: .45rem;
  padding: .5rem 1.1rem;
  border-radius: 8px; border: none; cursor: pointer;
  font-family: inherit; font-size: .85rem; font-weight: 600;
  transition: all .2s;
}

.btn-gold {
  background: linear-gradient(135deg, var(--gold), #b8862d);
  color: #0d0f18;
}
.btn-gold:hover { filter: brightness(1.15); transform: translateY(-1px); }

.btn-discord {
  background: #5865F2;
  color: #fff;
}
.btn-discord:hover { filter: brightness(1.1); transform: translateY(-1px); }

.btn-red {
  background: var(--red);
  color: #fff;
}
.btn-red:hover { background: var(--red-l); }

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-outline:hover { border-color: var(--gold); color: var(--gold); }

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 4rem 1.5rem 3rem;
  background: radial-gradient(ellipse at 50% 0%, rgba(212,168,67,.08) 0%, transparent 70%);
}

.hero-badge {
  display: inline-block;
  padding: .3rem .9rem;
  border: 1px solid var(--gold);
  border-radius: 20px;
  font-size: .75rem; font-weight: 600; color: var(--gold);
  letter-spacing: .08em; text-transform: uppercase;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  background: linear-gradient(135deg, var(--gold-l) 0%, var(--gold) 50%, #9a6e20 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2; margin-bottom: .75rem;
}

.hero-sub {
  color: var(--text-sec); font-size: 1rem; max-width: 500px; margin: 0 auto 2rem;
}

/* ── Stats bar ────────────────────────────────────────────── */
.stats-bar {
  display: flex; justify-content: center; gap: 2.5rem;
  padding: 1.25rem;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.stat-item { text-align: center; }
.stat-num  { font-size: 1.6rem; font-weight: 700; color: var(--gold); }
.stat-lbl  { font-size: .75rem; color: var(--text-sec); text-transform: uppercase; letter-spacing: .06em; }

.site-notice {
  max-width: 900px; margin: 2rem auto 0;
  padding: 1rem 1.5rem;
  background: rgba(212,168,67,.1);
  border: 1px solid rgba(212,168,67,.3);
  border-radius: var(--radius);
  color: var(--gold-l); font-size: 0.9rem;
  line-height: 1.5;
}

/* ── Chapter List ─────────────────────────────────────────── */
.section { max-width: 900px; margin: 0 auto; padding: 2.5rem 1.5rem; }
.section-title {
  font-size: 1.1rem; font-weight: 700; color: var(--gold);
  margin-bottom: 1.25rem;
  display: flex; align-items: center; gap: .6rem;
}
.section-title::before {
  content: ''; display: block;
  width: 4px; height: 1.1rem; background: var(--gold); border-radius: 2px;
}

.chapter-grid {
  display: grid; gap: .6rem;
}

.chapter-card {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.6rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all .2s;
}
.chapter-card:hover {
  background: var(--bg-card-h);
  border-color: var(--gold);
  transform: translateX(4px);
  box-shadow: var(--shadow);
}
.chapter-card.read {
  opacity: 0.7;
}
.chapter-card.read:hover {
    opacity: 1;
}

.read-badge {
    font-size: 0.65rem;
    background-color: var(--border);
    color: var(--text-sec);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    white-space: nowrap;
}

.chapter-num {
  font-size: .7rem; font-weight: 700; color: var(--gold);
  background: rgba(212,168,67,.12);
  border: 1px solid rgba(212,168,67,.3);
  border-radius: 6px;
  padding: .15rem .45rem; min-width: 40px; text-align: center; flex-shrink: 0;
}

.chapter-title {
  flex: 1; font-size: .85rem; font-weight: 500;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.chapter-views {
  font-size: .75rem; color: var(--text-sec); flex-shrink: 0;
  display: flex; align-items: center; gap: .3rem;
}

.momo-info strong { color: var(--text); }

/* ── Collapsible Donate ─────────────────────────────────── */
.donate-collapsible {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
  opacity: 0;
}
.donate-collapsible.open {
  max-height: 1200px;
  opacity: 1;
  margin-top: 2rem;
}
.donate-toggle-wrapper {
  text-align: center;
  padding: 1rem 0;
}
.donate-toggle-btn {
  background: rgba(212,168,67,0.1);
  border: 1.5px solid var(--gold);
  color: var(--gold);
  padding: 0.8rem 2.5rem;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 700;
  font-size: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(212,168,67,0.15);
  font-family: 'Be Vietnam Pro', sans-serif;
}
.donate-toggle-btn:hover {
  background: var(--gold);
  color: var(--bg);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(212,168,67,0.35);
}
.donate-toggle-btn svg {
  transition: transform 0.3s;
}
.donate-toggle-btn.active svg {
  transform: rotate(180deg);
}

.qr-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.5rem;
  text-align: center;
  transition: transform 0.3s, border-color 0.3s;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}
.qr-card:hover {
  transform: translateY(-5px);
  border-color: var(--gold);
}
.qr-img-wrapper {
  margin: 0 auto 1.25rem;
  width: 220px;
  height: 220px;
  border-radius: 16px;
  overflow: hidden;
  border: 2px solid var(--border);
  cursor: zoom-in;
  transition: border-color 0.3s;
}
.qr-card:hover .qr-img-wrapper {
  border-color: var(--gold);
}
.qr-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}
.qr-img-wrapper:hover img {
  transform: scale(1.08);
}

/* ── Footer ───────────────────────────────────────────────── */
footer {
  text-align: center; padding: 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--text-sec); font-size: .8rem;
}

/* ── Reading Page ─────────────────────────────────────────── */
.progress-bar {
  position: fixed; top: 0; left: 0; z-index: 200;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--red));
  transition: width .1s linear;
}

.chapter-hero {
  text-align: center; padding: 3rem 1.5rem 2rem;
  background: radial-gradient(ellipse at 50% 0%, rgba(212,168,67,.07) 0%, transparent 70%);
}
.chapter-hero .chap-label {
  font-size: .8rem; color: var(--gold); font-weight: 600;
  letter-spacing: .1em; text-transform: uppercase;
  margin-bottom: .5rem;
}
.chapter-hero h1 {
  font-size: clamp(1.3rem, 3vw, 1.9rem);
  font-weight: 700; color: var(--text);
}

/* Nav buttons */
.chapter-nav {
  display: flex; justify-content: space-between; align-items: center;
  max-width: 760px; margin: 0 auto 2rem; padding: 0 1.5rem;
  gap: .75rem;
}
.chapter-nav .btn { flex: 1; justify-content: center; }
.chapter-nav .nav-center { text-align: center; font-size: .8rem; color: var(--text-sec); }

/* Content */
.chapter-content {
  max-width: 720px; margin: 0 auto;
  padding: 0 1.5rem 4rem;
  font-family: 'Noto Serif', serif;
  font-size: 1.05rem;
  line-height: 1.95;
  color: #ddd8cc;
}
.chapter-content p { margin-bottom: 1.2em; }

/* Font size controls */
.reader-toolbar {
  display: flex; justify-content: center; align-items: center; gap: .75rem;
  padding: .75rem; margin-bottom: 1.5rem;
  background: var(--bg-card); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.font-btn {
  background: var(--bg-card-h); border: 1px solid var(--border);
  color: var(--text); border-radius: 6px;
  width: 32px; height: 32px; cursor: pointer;
  font-size: 1rem; display: flex; align-items: center; justify-content: center;
  transition: all .2s;
}
.font-btn:hover { border-color: var(--gold); color: var(--gold); }
.font-label { font-size: .8rem; color: var(--text-sec); min-width: 50px; text-align: center; }

/* Floating buttons */
.float-group {
  position: fixed; bottom: 1.5rem; right: 1.5rem;
  display: flex; flex-direction: column; gap: .65rem;
  z-index: 50;
}
.float-btn {
  width: 44px; height: 44px; border-radius: 50%;
  border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; transition: all .2s;
  box-shadow: 0 4px 16px rgba(0,0,0,.4);
}
.float-btn:hover { transform: scale(1.1); }
.float-top { background: var(--bg-card); border: 1px solid var(--border); color: var(--text-sec); }
.float-report { background: var(--red); color: #fff; }
.float-donate { background: linear-gradient(135deg, #ae2d68, #d64289); color: #fff; }
.float-discord { background: #5865F2; color: #fff; }
.float-edit { background: linear-gradient(135deg, var(--gold), #b8862d); color: #0d0f18; }

/* ── Admin chapter states ──────────────────────────────────── */
.chapter-card.chapter-hidden {
  opacity: .55;
  border-color: rgba(192,57,43,.4);
  background: rgba(192,57,43,.05);
}
.chapter-card.chapter-hidden:hover {
  opacity: 1;
  border-color: var(--red-l);
}
.hidden-badge {
  font-size: .65rem;
  background: rgba(192,57,43,.25);
  color: var(--red-l);
  border: 1px solid rgba(192,57,43,.4);
  padding: .15rem .4rem;
  border-radius: 4px;
  white-space: nowrap;
  flex-shrink: 0;
}

/* ── Modal ────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 500;
  background: rgba(0,0,0,.7); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity .25s;
  padding: 1rem;
}
.modal-overlay.active { opacity: 1; pointer-events: auto; }

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.75rem;
  width: 100%; max-width: 420px;
  transform: translateY(20px); transition: transform .25s;
}
.modal-overlay.active .modal { transform: translateY(0); }

.modal h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 1.25rem; color: var(--gold); }

.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: .82rem; color: var(--text-sec); margin-bottom: .4rem; }

select, textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  padding: .6rem .85rem;
  font-size: .9rem;
  transition: border .2s;
}
select:focus, textarea:focus { outline: none; border-color: var(--gold); }
textarea { resize: vertical; min-height: 80px; }

.modal-footer { display: flex; gap: .75rem; margin-top: 1.25rem; }
.modal-footer .btn { flex: 1; justify-content: center; }

/* Loading skeleton */
.skeleton {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-card-h) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  border-radius: 6px; height: 52px;
}
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 600px) {
  .stats-bar { gap: 1.5rem; }
  .stat-num { font-size: 1.3rem; }
  .chapter-nav { flex-wrap: wrap; }
  .chapter-nav .nav-center { width: 100%; order: -1; }

  /* Header */
  .header {
    padding: 0 .85rem;
    height: 54px;
  }
  .header-logo {
    font-size: .82rem;
    /* Cho phép logo xuống dòng 2 dòng nếu cần, hoặc ellipsis */
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 55vw; /* tránh đè lên nav */
  }
  .header-nav {
    gap: .4rem;
    flex-shrink: 0;
  }
  /* Thu nhỏ các nút trong header */
  .header-nav .btn {
    padding: .35rem .6rem;
    font-size: .75rem;
    gap: .3rem;
  }
  /* Ẩn label text của nút Discord trên mobile rất nhỏ */
  @media (max-width: 400px) {
    .header-nav .btn-discord span,
    .header-nav .btn-discord {
      /* Hiện icon + text nhưng thu nhỏ tối đa */
      padding: .35rem .5rem;
      font-size: .7rem;
    }
    .header-logo {
      max-width: 50vw;
      font-size: .78rem;
    }
  }
}