/* ================================================================
   BPHS Book Reader — Divine Reading Theme
   learn.lacunaastro.com/BPHS
================================================================ */

/* ── Tokens ── */
:root {
  --deep:      #0a0612;
  --dark:      #110d1e;
  --mid:       #1c1532;
  --purple:    #6c3fc5;
  --violet:    #9b59e8;
  --lavender:  #c4a8f5;
  --gold:      #e8c96a;
  --gold2:     #f5dfa0;
  --white:     #f0eaff;
  --muted:     #a89bc2;

  --parchment: #faf6ee;
  --ink:       #1a1410;
  --ink-mid:   #3d3428;
  --ink-light: #6b5c47;
  --border:    rgba(108,63,197,.18);

  --sidebar-w: 300px;
  --header-h:  64px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

/* ── Body ── */
body {
  background: var(--deep);
  color: var(--white);
  font-family: 'Raleway', sans-serif;
  font-weight: 400;
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
}

/* ── Header ── */
#book-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 300;
  height: var(--header-h);
  background: linear-gradient(to bottom, rgba(10,6,18,.97), rgba(10,6,18,.85));
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px;
  gap: 16px;
}
.header-logo {
  font-family: 'Cinzel', serif; font-size: 1.1rem; font-weight: 700;
  color: var(--gold); letter-spacing: 2px; text-decoration: none;
  white-space: nowrap;
}
.header-logo span { color: var(--lavender); }
.header-title {
  font-family: 'Cinzel', serif; font-size: .85rem; color: var(--muted);
  letter-spacing: 1px; text-transform: uppercase;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.header-actions { display: flex; gap: 10px; align-items: center; flex-shrink: 0; }
.btn-icon {
  background: none; border: 1px solid var(--border); color: var(--lavender);
  border-radius: 8px; padding: 7px 12px; cursor: pointer; font-size: .85rem;
  transition: all .2s; white-space: nowrap;
  font-family: 'Raleway', sans-serif;
}
.btn-icon:hover { background: rgba(108,63,197,.15); border-color: var(--violet); color: var(--gold); }
#sidebar-toggle { display: none; }

/* ── Layout ── */
.book-layout {
  display: flex;
  padding-top: var(--header-h);
  min-height: 100vh;
}

/* ── Sidebar ── */
#sidebar {
  position: fixed;
  top: var(--header-h); left: 0; bottom: 0;
  width: var(--sidebar-w);
  background: rgba(8,5,16,.97);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  overflow: hidden;
  transition: transform .35s cubic-bezier(.4,0,.2,1);
  z-index: 200;
}
.sidebar-head {
  padding: 20px 18px 14px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.sidebar-head h2 {
  font-family: 'Cinzel', serif; font-size: .9rem; color: var(--gold);
  letter-spacing: 2px; text-transform: uppercase; margin-bottom: 12px;
}
#chapter-search {
  width: 100%; padding: 9px 14px; border-radius: 8px;
  background: rgba(255,255,255,.06); border: 1px solid var(--border);
  color: var(--white); font-family: 'Raleway', sans-serif; font-size: .85rem;
  outline: none; transition: border-color .2s;
}
#chapter-search::placeholder { color: var(--muted); }
#chapter-search:focus { border-color: var(--violet); }
.chapter-list {
  flex: 1; overflow-y: auto; padding: 8px 0;
}
.chapter-list::-webkit-scrollbar { width: 4px; }
.chapter-list::-webkit-scrollbar-track { background: transparent; }
.chapter-list::-webkit-scrollbar-thumb { background: rgba(108,63,197,.4); border-radius: 2px; }
.ch-item {
  display: block; padding: 10px 18px; cursor: pointer;
  color: var(--muted); font-size: .82rem; line-height: 1.4;
  border-left: 3px solid transparent;
  transition: all .18s;
  text-decoration: none;
}
.ch-item:hover { color: var(--lavender); background: rgba(108,63,197,.1); }
.ch-item.active {
  color: var(--gold); border-left-color: var(--gold);
  background: rgba(232,201,106,.07);
  font-weight: 600;
}
.ch-item .ch-num {
  display: block; font-size: .7rem; color: var(--violet); letter-spacing: 1px;
  text-transform: uppercase; margin-bottom: 2px;
}
.ch-item.supplement { border-top: 1px solid var(--border); margin-top: 8px; padding-top: 16px; }

/* ── Main content ── */
#main {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex; flex-direction: column;
  min-height: calc(100vh - var(--header-h));
}

/* ── Chapter pane ── */
#chapter-pane {
  flex: 1;
  max-width: 780px;
  margin: 0 auto;
  padding: 48px 40px 80px;
  width: 100%;
}

/* ── Chapter header ── */
.ch-header {
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(196,168,245,.15);
}
.ch-label {
  font-size: .72rem; letter-spacing: 4px; text-transform: uppercase;
  color: var(--violet); margin-bottom: 10px; display: block;
}
.ch-title {
  font-family: 'Cinzel', serif;
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  font-weight: 700; line-height: 1.2;
  background: linear-gradient(135deg, var(--gold2) 0%, var(--lavender) 70%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

/* ── Reading area (content) ── */
.ch-content {
  background: var(--parchment);
  border-radius: 16px;
  padding: 40px 44px;
  box-shadow: 0 0 60px rgba(0,0,0,.4), inset 0 0 80px rgba(232,201,106,.03);
  border: 1px solid rgba(232,201,106,.15);
}

/* Text inside parchment */
.ch-content p {
  color: var(--ink-mid);
  font-size: 1.02rem;
  line-height: 1.85;
  margin-bottom: 1.1em;
  text-align: justify;
  font-family: 'Raleway', sans-serif;
}
.ch-content p:last-child { margin-bottom: 0; }

.ch-content h3 {
  font-family: 'Cinzel', serif;
  color: #4a2c8a;
  font-size: 1.15rem;
  margin: 1.8em 0 .6em;
  letter-spacing: .5px;
}
.ch-content h4 {
  font-family: 'Cinzel', serif;
  color: #5a3c9a;
  font-size: 1rem;
  margin: 1.4em 0 .4em;
}

.ch-content em {
  color: #2d6b3a;
  font-style: italic;
}

.ch-content .note {
  color: #3a6b2a;
  font-style: italic;
  margin-left: 1.5em;
  margin-right: 1.5em;
  padding-left: 16px;
  border-left: 3px solid rgba(58,107,42,.3);
  font-size: .95rem;
}

.ch-content .sanskrit {
  font-family: 'Noto Sans Devanagari', serif;
  color: #2a1a5e;
  background: rgba(108,63,197,.06);
  border-left: 4px solid rgba(108,63,197,.4);
  padding: 12px 18px;
  border-radius: 0 8px 8px 0;
  margin: 1em 0;
  line-height: 1.9;
  font-size: 1.05rem;
}

.ch-content ul, .ch-content ol {
  margin: .6em 0 1em 1.5em; color: var(--ink-mid);
}
.ch-content li { margin-bottom: .4em; line-height: 1.7; }

.ch-content hr {
  border: none; border-top: 1px solid rgba(108,63,197,.2);
  margin: 2em 0;
}

.ch-content sup { font-size: .7em; color: var(--purple); }

.ch-content strong { color: var(--ink); font-weight: 700; }

/* Tables */
.ch-content table {
  width: 100%; border-collapse: collapse; margin: 1.2em 0; font-size: .9rem;
}
.ch-content th {
  background: rgba(108,63,197,.1); color: #2a1a5e;
  padding: 8px 12px; font-family: 'Cinzel', serif;
  border: 1px solid rgba(108,63,197,.2);
}
.ch-content td {
  padding: 7px 12px; color: var(--ink-mid);
  border: 1px solid rgba(108,63,197,.12);
}
.ch-content tr:nth-child(even) td { background: rgba(108,63,197,.03); }

/* ── Navigation bar ── */
.ch-nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; margin-top: 40px; padding-top: 24px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}
.ch-nav-btn {
  display: flex; align-items: center; gap: 8px;
  background: rgba(108,63,197,.12); border: 1px solid var(--border);
  color: var(--lavender); padding: 11px 20px; border-radius: 10px;
  cursor: pointer; font-family: 'Raleway', sans-serif; font-size: .88rem;
  font-weight: 500; transition: all .2s; text-decoration: none;
  min-width: 120px;
}
.ch-nav-btn:hover { background: rgba(108,63,197,.25); border-color: var(--violet); color: var(--gold); }
.ch-nav-btn:disabled, .ch-nav-btn.hidden { opacity: 0; pointer-events: none; }
.ch-nav-btn.prev { justify-content: flex-start; }
.ch-nav-btn.next { justify-content: flex-end; margin-left: auto; }
.ch-nav-center { color: var(--muted); font-size: .82rem; text-align: center; }

/* ── Chapter jump modal ── */
#jump-modal {
  display: none; position: fixed; inset: 0; z-index: 500;
  background: rgba(0,0,0,.7); backdrop-filter: blur(6px);
  align-items: center; justify-content: center;
}
#jump-modal.open { display: flex; }
.jump-box {
  background: var(--dark); border: 1px solid var(--border);
  border-radius: 16px; padding: 32px; width: 90%; max-width: 500px;
  box-shadow: 0 0 60px rgba(108,63,197,.3);
}
.jump-box h3 {
  font-family: 'Cinzel', serif; color: var(--gold); margin-bottom: 20px;
  font-size: 1.1rem; letter-spacing: 1px;
}
#jump-select {
  width: 100%; padding: 12px 16px; border-radius: 10px;
  background: rgba(255,255,255,.06); border: 1px solid var(--border);
  color: var(--white); font-family: 'Raleway', sans-serif; font-size: .9rem;
  outline: none; cursor: pointer; margin-bottom: 16px;
}
#jump-select option { background: var(--dark); }
.jump-actions { display: flex; gap: 12px; justify-content: flex-end; }
.btn-gold {
  background: linear-gradient(135deg, #c9973a, var(--gold));
  color: #0a0612; padding: 11px 24px; border-radius: 8px; border: none;
  font-weight: 700; cursor: pointer; font-family: 'Raleway', sans-serif;
  font-size: .9rem; transition: all .2s;
}
.btn-gold:hover { box-shadow: 0 0 20px rgba(232,201,106,.4); }
.btn-cancel {
  background: none; border: 1px solid var(--border); color: var(--muted);
  padding: 11px 24px; border-radius: 8px; cursor: pointer;
  font-family: 'Raleway', sans-serif; font-size: .9rem;
}
.btn-cancel:hover { border-color: var(--lavender); color: var(--lavender); }

/* ── Footer ── */
#book-footer {
  background: rgba(6,4,12,.9);
  border-top: 1px solid var(--border);
  padding: 24px 40px;
  margin-left: var(--sidebar-w);
  text-align: center;
  color: rgba(168,155,194,.4); font-size: .8rem;
}
#book-footer a { color: var(--muted); text-decoration: none; }
#book-footer a:hover { color: var(--lavender); }

/* ── Overlay for mobile sidebar ── */
#sidebar-overlay {
  display: none; position: fixed; inset: 0; z-index: 199;
  background: rgba(0,0,0,.6); backdrop-filter: blur(2px);
}

/* ── Loading state ── */
#loading {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  min-height: 300px; gap: 16px; color: var(--muted);
}
.spinner {
  width: 40px; height: 40px; border: 3px solid rgba(196,168,245,.2);
  border-top-color: var(--violet); border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Mobile ── */
@media (max-width: 900px) {
  :root { --sidebar-w: 280px; }

  #sidebar-toggle { display: flex; }

  #sidebar {
    transform: translateX(-100%);
  }
  #sidebar.open {
    transform: translateX(0);
    box-shadow: 4px 0 40px rgba(0,0,0,.5);
  }
  #sidebar-overlay.open { display: block; }

  #main { margin-left: 0; }
  #book-footer { margin-left: 0; }

  #chapter-pane { padding: 28px 20px 60px; }
  .ch-content { padding: 24px 20px; }
  .ch-content p { font-size: .97rem; text-align: left; }
  .ch-nav { gap: 10px; }
  .ch-nav-btn { min-width: 90px; padding: 10px 14px; font-size: .82rem; }
  .header-title { font-size: .7rem; letter-spacing: .5px; }
  .header-divider { display: none; }
}

@media (max-width: 480px) {
  #chapter-pane { padding: 20px 14px 50px; }
  .ch-content { padding: 20px 16px; border-radius: 10px; }
  .ch-title { font-size: 1.3rem; }
  .header-title { font-size: .62rem; max-width: 140px; }
}

/* ── Contact Banner ────────────────────────────── */
.contact-banner {
  background: linear-gradient(135deg, rgba(108,63,197,.18) 0%, rgba(155,89,232,.12) 100%);
  border: 1px solid rgba(196,168,245,.25);
  border-radius: 16px;
  padding: 28px 36px;
  margin: 36px auto 0;
  max-width: 820px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.contact-banner-label {
  font-family: 'Cinzel', serif;
  font-size: .68rem;
  letter-spacing: 3px;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 6px;
}
.contact-banner-title {
  font-family: 'Cinzel', serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 4px;
}
.contact-banner-sub { font-size: .8rem; color: var(--muted); }
.contact-banner-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}
.contact-banner-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 18px;
  border-radius: 8px;
  font-family: 'Raleway', sans-serif;
  font-size: .82rem;
  font-weight: 600;
  text-decoration: none;
  transition: all .22s ease;
  white-space: nowrap;
}
.contact-banner-btn.whatsapp { background: rgba(37,211,102,.12); border: 1px solid rgba(37,211,102,.35); color: #4dd67e; }
.contact-banner-btn.whatsapp:hover { background: rgba(37,211,102,.22); border-color: rgba(37,211,102,.6); transform: translateY(-2px); }
.contact-banner-btn.email { background: rgba(196,168,245,.08); border: 1px solid rgba(196,168,245,.3); color: var(--lavender); }
.contact-banner-btn.email:hover { background: rgba(196,168,245,.16); border-color: rgba(196,168,245,.5); transform: translateY(-2px); }
.contact-banner-btn.website { background: linear-gradient(135deg, rgba(232,201,106,.15), rgba(245,223,160,.1)); border: 1px solid rgba(232,201,106,.35); color: var(--gold); }
.contact-banner-btn.website:hover { background: linear-gradient(135deg, rgba(232,201,106,.25), rgba(245,223,160,.18)); transform: translateY(-2px); }
@media (max-width: 640px) {
  .contact-banner { flex-direction: column; align-items: flex-start; padding: 20px 16px; }
  .contact-banner-links { gap: 8px; }
  .contact-banner-btn { padding: 8px 14px; font-size: .78rem; }
}