/* ============================================================
   PCTE E-Library Management System
   style.css — Main Stylesheet
   Designed by Zaidd
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,600;0,700;1,400&family=Outfit:wght@300;400;500;600;700&family=Playfair+Display:ital,wght@0,700;1,400&display=swap');

:root {
  --navy:       #3a1d06;
  --navy-2:     #734e0e;
  --navy-3:     #4c3007;
  --navy-4:     #855d15;
  --gold:       #c9a84c;
  --gold-light: #e8c97a;
  --gold-dim:   #7a6030;
  --cream:      #f5f0e8;
  --cream-2:    #ede5d5;
  --text-light: #d4cfc8;
  --text-muted: #8a8880;
  --accent:     #c16f18;
  --accent-2:   #bb6c06;
  --success:    #d3962e;
  --danger:     #e05a5a;
  --glass-bg:   rgba(209, 105, 20, 0.04);
  --glass-border: rgba(201,168,76,0.18);
  --glass-shadow: rgba(186, 92, 92, 0.5);
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Outfit', sans-serif;
  --transition:   0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --radius:       14px;
}

[data-theme="light"] {
  --navy:         #f0ece4;
  --navy-2:       #e8e2d8;
  --navy-3:       #ddd5c8;
  --navy-4:       #d0c7b8;
  --gold:         #8b6914;
  --gold-light:   #a07820;
  --gold-dim:     #c8a855;
  --cream:        #1a1208;
  --cream-2:      #2a1c0e;
  --text-light:   #2d2416;
  --text-muted:   #6b5d48;
  --glass-bg:     rgba(0,0,0,0.04);
  --glass-border: rgba(139,105,20,0.25);
  --glass-shadow: rgba(0,0,0,0.12);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--arial, sans-serif);
  background: var(--navy);
  color: var(--text-light);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.4s, color 0.4s;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul { list-style: none; }

/* === Background === */
.bg-canvas {
  position: fixed;
   inset: 0; 
   z-index: 0;
    pointer-events: none; 
    overflow: hidden;
}
.bg-canvas::before {
  content: '';
  position: absolute;
  width: 140vw; height: 140vh; top: -20vh; left: -20vw;
  background:
    radial-gradient(ellipse 60% 50% at 20% 30%, rgba(74,90,180,0.15) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 80% 70%, rgba(201,168,76,0.10) 0%, transparent 70%);
  animation: bgPulse 14s ease-in-out infinite alternate;
}
@keyframes bgPulse {
  0%   { transform: scale(1); }
  100% { transform: scale(1.08) rotate(-1deg); }
}
#particles-canvas { position: fixed; inset: 0; z-index: 0; pointer-events: none; }
.page-wrapper { position: relative; z-index: 1; min-height: 100vh; }

/* === Sidebar === */
.sidebar {
  position: fixed; top: 50%; left: 20px; transform: translateY(-50%);
  z-index: 100;
  display: flex; flex-direction: column; gap: 6px;
  background: rgba(10,14,26,0.82);
  backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border);
  border-radius: 22px;
  padding: 18px 12px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.55), inset 0 1px 0 rgba(255,255,255,0.06);
}

[data-theme="light"] .sidebar { background: rgba(240,236,228,0.88); }

.sidebar-logo {
  display: flex; align-items: center; justify-content: center;
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--gold), var(--gold-dim));
  border-radius: 11px; margin-bottom: 6px;
  box-shadow: 0 4px 14px rgba(201,168,76,0.35);
}
.sidebar-logo svg { width: 20px; height: 20px; fill: #0a0e1a; }
.sidebar-divider { width: 24px; height: 1px; background: var(--glass-border); align-self: center; margin: 3px 0; }

.nav-item {
  position: relative;
  display: flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 11px;
  color: var(--text-muted);
  transition: all var(--transition);
  text-decoration: none;
}
.nav-item:hover, .nav-item.active {
  background: rgba(201,168,76,0.1);
  color: var(--gold);
  border: 1px solid var(--glass-border);
}
.nav-item.active { background: rgba(201,168,76,0.15); }
.nav-item svg { width: 17px; height: 17px; }

.nav-tooltip {
  position: absolute; left: 56px;
  background: rgba(10,14,26,0.96);
  border: 1px solid var(--glass-border);
  color: var(--text-light);
  font-size: 0.76rem; font-weight: 500; letter-spacing: 0.04em;
  padding: 5px 11px; border-radius: 7px;
  white-space: nowrap; opacity: 0; pointer-events: none;
  transform: translateX(-6px); transition: all 0.2s ease;
}
.nav-item:hover .nav-tooltip { opacity: 1; transform: translateX(0); }

.theme-toggle-btn {
  display: flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 11px;
  color: var(--text-muted); cursor: pointer;
  transition: all var(--transition); margin-top: 4px;
}
.theme-toggle-btn:hover { color: var(--gold); background: rgba(201,168,76,0.1); }
.theme-toggle-btn svg { width: 17px; height: 17px; }

/* === Top Bar === */
.top-bar {
  position: fixed; top: 14px; right: 20px; z-index: 100;
  display: flex; align-items: center; gap: 10px;
}
.top-pill {
  background: rgba(10,14,26,0.82);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 50px; padding: 9px 18px;
  display: flex; align-items: center; gap: 7px;
  font-size: 0.78rem; font-weight: 500; color: var(--text-muted);
}
[data-theme="light"] .top-pill { background: rgba(240,236,228,0.88); }
.top-pill .live-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 7px var(--success);
  animation: livePulse 2s infinite;
}
@keyframes livePulse { 0%,100%{opacity:1;} 50%{opacity:0.4;} }

/* === Main Layout === */
.main-content { margin-left: 80px; padding: 20px 28px 60px; }

/* === Glass card === */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: 0 4px 28px var(--glass-shadow);
}

/* === Buttons === */
.btn-gold {
  display: inline-flex; align-items: center; gap: 8px;
  background: linear-gradient(135deg, var(--gold), var(--gold-dim));
  color: #0a0e1a;
  font-family: var(--font-body); font-weight: 600; font-size: 0.86rem;
  letter-spacing: 0.06em; text-transform: uppercase;
  padding: 12px 26px; border-radius: 50px;
  border: none; cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 4px 18px rgba(201,168,76,0.3);
}
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(201,168,76,0.45); filter: brightness(1.08); }

.btn-outline {
  display: inline-flex; align-items: center; gap: 8px;
  background: transparent; color: var(--gold);
  font-family: var(--font-body); font-weight: 500; font-size: 0.83rem;
  letter-spacing: 0.06em; text-transform: uppercase;
  padding: 11px 22px; border-radius: 50px;
  border: 1px solid var(--gold-dim); cursor: pointer;
  transition: all var(--transition);
}
.btn-outline:hover { background: rgba(201,168,76,0.1); border-color: var(--gold); transform: translateY(-1px); }

/* === Section Titles === */
.section-title {
  font-family: var(--font-display);
  font-size: 2.6rem; font-weight: 600;
  color: var(--cream); letter-spacing: -0.02em; line-height: 1.1;
}
.section-title span { color: var(--gold); font-style: italic; }
.section-sub {
  font-size: 0.78rem; color: var(--text-muted);
  letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 6px;
}

/* === Reveal animation === */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* === Toast === */
.toast-container { position: fixed; bottom: 24px; right: 24px; z-index: 9999; display: flex; flex-direction: column; gap: 8px; }
.toast {
  background: rgba(10,14,26,0.96);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(20px);
  border-radius: 13px; padding: 14px 20px;
  display: flex; align-items: center; gap: 12px;
  min-width: 270px;
  box-shadow: 0 8px 36px rgba(0,0,0,0.5);
  animation: toastIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.toast.success { border-color: rgba(76,175,130,0.4); }
.toast.error   { border-color: rgba(224,90,90,0.4); }
.toast-icon { width: 30px; height: 30px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.toast.success .toast-icon { background: rgba(76,175,130,0.2); color: var(--success); }
.toast.error   .toast-icon { background: rgba(224,90,90,0.2);  color: var(--danger); }
.toast-msg { font-size: 0.83rem; font-weight: 500; color: var(--text-light); }
@keyframes toastIn { from{opacity:0;transform:translateX(30px) scale(0.95);} to{opacity:1;transform:translateX(0) scale(1);} }
.toast.hiding { animation: toastOut 0.3s ease forwards; }
@keyframes toastOut { to{opacity:0;transform:translateX(30px) scale(0.9);} }

/* === Footer === */
footer {
  position: relative; z-index: 1;
  margin-left: 80px; padding: 22px 36px;
  border-top: 1px solid var(--glass-border);
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px;
}
.footer-brand { font-family: var(--font-display); font-size: 1.05rem; color: var(--gold); font-weight: 600; }
.footer-text  { font-size: 0.76rem; color: var(--text-muted); letter-spacing: 0.04em; }
.footer-credit { font-size: 0.76rem; color: var(--text-muted); }
.footer-credit span { color: var(--gold); font-weight: 600; }

/* =============================================
   LANDING PAGE
   ============================================= */
.hero {
  min-height: 100vh; display: grid; place-items: center;
  text-align: center; padding: 80px 24px; position: relative;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 7px;
  background: rgba(201,168,76,0.08); border: 1px solid rgba(201,168,76,0.25);
  border-radius: 50px; padding: 5px 16px;
  font-size: 0.73rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--gold);
  margin-bottom: 26px; animation: fadeDown 0.8s ease both;
}
.eyebrow-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--gold); animation: livePulse 1.8s infinite; }
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6.5rem);
  font-weight: 700; line-height: 1;
  color: var(--cream); letter-spacing: -0.03em;
  margin-bottom: 22px; animation: fadeDown 0.9s 0.1s ease both;
}
.hero-title .gold-line { color: var(--gold); font-style: italic; display: block; }
.hero-title .blue-line { color: var(--accent-2); display: block; font-size: 0.6em; font-weight: 400; letter-spacing: 0.08em; margin-top: 8px; font-family: var(--font-body); }
.hero-subtitle {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: var(--text-muted); max-width: 520px; margin: 0 auto 38px; line-height: 1.75;
  animation: fadeDown 1s 0.2s ease both;
}
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; animation: fadeDown 1.1s 0.3s ease both; }
@keyframes fadeDown { from{opacity:0;transform:translateY(-18px);} to{opacity:1;transform:translateY(0);} }

.scroll-hint {
  position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 5px;
  opacity: 0.35; animation: bounceScroll 2s infinite;
}
.scroll-hint span { font-size: 0.65rem; letter-spacing: 0.1em; text-transform: uppercase; }
.scroll-hint svg { width: 14px; height: 14px; }
@keyframes bounceScroll { 0%,100%{transform:translateX(-50%) translateY(0);} 50%{transform:translateX(-50%) translateY(7px);} }

.features-strip { padding: 70px 60px; display: grid; grid-template-columns: repeat(auto-fit, minmax(210px,1fr)); gap: 20px; }
.feature-card {
  padding: 28px 24px; border-radius: var(--radius);
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px); transition: all var(--transition); position: relative; overflow: hidden;
}
.feature-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0; transition: opacity var(--transition);
}
.feature-card:hover { transform: translateY(-5px); border-color: rgba(201,168,76,0.32); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 46px; height: 46px; border-radius: 11px;
  background: rgba(201,168,76,0.1); border: 1px solid rgba(201,168,76,0.2);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px; color: var(--gold);
}
.feature-icon svg { width: 20px; height: 20px; }
.feature-title { font-family: var(--font-display); font-size: 1.25rem; font-weight: 600; color: var(--cream); margin-bottom: 8px; }
.feature-text { font-size: 0.82rem; color: var(--text-muted); line-height: 1.65; }

.institution-section { padding: 70px 60px; text-align: center; border-top: 1px solid var(--glass-border); }
.pcte-badge {
  display: inline-flex; align-items: center; gap: 16px;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  border-radius: 18px; padding: 22px 36px; backdrop-filter: blur(12px);
}
.pcte-logo-text { font-family: var(--font-display); font-size: 1.9rem; font-weight: 700; color: var(--gold); letter-spacing: -0.01em; }
.pcte-name { font-size: 0.95rem; font-weight: 600; color: var(--cream); }
.pcte-tagline { font-size: 0.76rem; color: var(--text-muted); margin-top: 2px; }

.stats-ribbon {
  display: flex; justify-content: center; gap: 56px; flex-wrap: wrap;
  padding: 36px 60px;
  border-top: 1px solid var(--glass-border);
  border-bottom: 1px solid var(--glass-border);
}
.stat-item { text-align: center; }
.stat-number { font-family: var(--font-display); font-size: 2.8rem; font-weight: 700; color: var(--gold); line-height: 1; }
.stat-label { font-size: 0.74rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); margin-top: 4px; }

/* =============================================
   GALLERY PAGE
   ============================================= */
.gallery-header {
  padding: 38px 0 28px;
  display: flex; align-items: flex-end; justify-content: space-between; flex-wrap: wrap; gap: 18px;
}
.search-wrap { position: relative; flex: 1; max-width: 360px; }
.search-wrap input {
  width: 100%;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  border-radius: 50px; padding: 11px 18px 11px 44px;
  color: var(--text-light); font-family: var(--font-body); font-size: 0.86rem;
  outline: none; backdrop-filter: blur(12px); transition: all var(--transition);
}
.search-wrap input::placeholder { color: var(--text-muted); }
.search-wrap input:focus { border-color: var(--gold-dim); box-shadow: 0 0 0 3px rgba(201,168,76,0.1); }
.search-icon { position: absolute; left: 15px; top: 50%; transform: translateY(-50%); color: var(--text-muted); pointer-events: none; }
.search-icon svg { width: 15px; height: 15px; }

.filter-bar { display: flex; gap: 7px; flex-wrap: wrap; margin-bottom: 28px; }
.chip {
  padding: 6px 16px; border-radius: 50px;
  border: 1px solid var(--glass-border); background: var(--glass-bg);
  color: var(--text-muted); font-size: 0.76rem; letter-spacing: 0.04em; font-weight: 500;
  cursor: pointer; transition: all var(--transition);
}
.chip:hover { border-color: var(--gold-dim); color: var(--gold); }
.chip.active { background: rgba(201,168,76,0.14); border-color: var(--gold); color: var(--gold); }

.book-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(195px,1fr)); gap: 24px; }

/* Flip card */
.book-card { perspective: 1000px; height: 315px; }
.book-card-inner {
  position: relative; width: 100%; height: 100%;
  transition: transform 0.65s cubic-bezier(0.4, 0.2, 0.2, 1);
  transform-style: preserve-3d; cursor: pointer;
}
.book-card:hover .book-card-inner { transform: rotateY(180deg); }
.book-front, .book-back {
  position: absolute; inset: 0; border-radius: var(--radius);
  backface-visibility: hidden; -webkit-backface-visibility: hidden; overflow: hidden;
}
.book-front {
  background: var(--navy-3); border: 1px solid var(--glass-border);
  display: flex; flex-direction: column;
}
.book-cover-placeholder {
  width: 100%; height: 215px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 1rem; font-weight: 600;
  color: rgba(255,255,255,0.88); text-align: center; padding: 14px; position: relative;
}
.book-cover-placeholder::after {
  content: ''; position: absolute; inset: 0;
  background: repeating-linear-gradient(-45deg, rgba(255,255,255,0.025) 0px, rgba(255,255,255,0.025) 1px, transparent 1px, transparent 11px);
}
.book-spine { position: absolute; left: 0; top: 0; bottom: 0; width: 5px; background: rgba(0,0,0,0.3); }
.bk-title { position: relative; z-index: 1; font-size: 0.95rem; line-height: 1.25; }
.bk-author { position: relative; z-index: 1; font-size: 0.68rem; opacity: 0.65; margin-top: 6px; font-family: var(--font-body); }
.book-meta { padding: 10px 13px; flex: 1; display: flex; flex-direction: column; gap: 3px; }
.book-title-card { font-family: var(--font-display); font-size: 0.95rem; font-weight: 600; color: var(--cream); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.book-author-card { font-size: 0.72rem; color: var(--text-muted); }
.book-status {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 0.68rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; margin-top: 3px;
}
.status-dot { width: 6px; height: 6px; border-radius: 50%; }
.book-status.available .status-dot { background: var(--success); box-shadow: 0 0 5px var(--success); }
.book-status.issued    .status-dot { background: var(--danger);  box-shadow: 0 0 5px var(--danger); }
.book-status.available { color: var(--success); }
.book-status.issued    { color: var(--danger); }

.book-back {
  transform: rotateY(180deg);
  background: linear-gradient(135deg, var(--navy-3), var(--navy-4));
  border: 1px solid var(--glass-border);
  padding: 20px 18px; display: flex; flex-direction: column; gap: 10px;
}
.back-label { font-size: 0.65rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--gold-dim); font-weight: 600; }
.back-title { font-family: var(--font-display); font-size: 1.15rem; font-weight: 600; color: var(--cream); line-height: 1.2; }
.back-author { font-size: 0.78rem; color: var(--text-muted); }
.back-cat {
  display: inline-block;
  background: rgba(201,168,76,0.1); border: 1px solid rgba(201,168,76,0.2);
  border-radius: 50px; padding: 3px 11px;
  font-size: 0.68rem; color: var(--gold); letter-spacing: 0.04em;
}
.back-divider { width: 100%; height: 1px; background: var(--glass-border); }
.back-isbn { font-size: 0.68rem; color: var(--text-muted); }
.back-actions { margin-top: auto; display: flex; gap: 7px; }
.btn-sm {
  flex: 1; padding: 8px 12px; border-radius: 8px;
  font-size: 0.72rem; font-weight: 600; letter-spacing: 0.04em;
  text-transform: uppercase; transition: all var(--transition); text-align: center; cursor: pointer;
  border: none; font-family: var(--font-body);
}
.btn-sm-gold { background: linear-gradient(135deg, var(--gold), var(--gold-dim)); color: #0a0e1a; }
.btn-sm-gold:hover { filter: brightness(1.1); transform: translateY(-1px); }
.btn-sm-gold:disabled, .btn-sm-gold.disabled { opacity: 0.38; cursor: not-allowed; filter: none; transform: none; }
.btn-sm-outline { background: transparent; border: 1px solid var(--glass-border); color: var(--text-muted); }
.btn-sm-outline:hover { border-color: var(--gold-dim); color: var(--gold); }

.empty-state { grid-column: 1/-1; text-align: center; padding: 70px 20px; color: var(--text-muted); }
.empty-state svg { width: 55px; height: 55px; opacity: 0.28; margin-bottom: 14px; }

/* =============================================
   DASHBOARD PAGE
   ============================================= */
.dash-header { padding: 38px 0 28px; }
.dash-greeting { font-family: var(--font-display); font-size: 2.1rem; font-weight: 600; color: var(--cream); }
.dash-greeting span { color: var(--gold); font-style: italic; }
.dash-date { font-size: 0.78rem; color: var(--text-muted); margin-top: 4px; letter-spacing: 0.04em; }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px,1fr)); gap: 18px; margin-bottom: 36px; }
.stat-card {
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  border-radius: var(--radius); padding: 24px;
  display: flex; flex-direction: column; gap: 10px;
  backdrop-filter: blur(12px); transition: all var(--transition);
  position: relative; overflow: hidden;
}
.stat-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; border-radius: 3px 3px 0 0;
}
.stat-card.total::before  { background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
.stat-card.issued::before { background: linear-gradient(90deg, #e05a5a, #f0856a); }
.stat-card.avail::before  { background: linear-gradient(90deg, #4caf82, #6bd4a0); }
.stat-card.members::before{ background: linear-gradient(90deg, var(--gold), var(--gold-light)); }
.stat-card:hover { transform: translateY(-4px); box-shadow: 0 12px 36px rgba(0,0,0,0.4); border-color: rgba(201,168,76,0.28); }
.stat-card-icon { width: 38px; height: 38px; border-radius: 9px; display: flex; align-items: center; justify-content: center; }
.stat-card.total  .stat-card-icon { background: rgba(74,144,217,0.15); color: var(--accent-2); }
.stat-card.issued .stat-card-icon { background: rgba(224,90,90,0.15);  color: var(--danger); }
.stat-card.avail  .stat-card-icon { background: rgba(76,175,130,0.15); color: var(--success); }
.stat-card.members .stat-card-icon { background: rgba(201,168,76,0.15); color: var(--gold); }
.stat-card-icon svg { width: 19px; height: 19px; }
.stat-card-number { font-family: var(--font-display); font-size: 2.6rem; font-weight: 700; color: var(--cream); line-height: 1; letter-spacing: -0.02em; }
.stat-card-label  { font-size: 0.74rem; color: var(--text-muted); letter-spacing: 0.06em; text-transform: uppercase; }
.stat-card-change { font-size: 0.72rem; color: var(--success); font-weight: 500; }

.charts-row { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-bottom: 32px; }
.chart-card { background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: var(--radius); padding: 26px; backdrop-filter: blur(12px); }
.chart-title { font-family: var(--font-display); font-size: 1.15rem; font-weight: 600; color: var(--cream); margin-bottom: 4px; }
.chart-sub   { font-size: 0.72rem; color: var(--text-muted); margin-bottom: 22px; }

.bar-chart { display: flex; align-items: flex-end; gap: 9px; height: 130px; }
.bar-wrap   { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 5px; height: 100%; }
.bar { width: 100%; border-radius: 4px 4px 0 0; position: relative; transition: height 1.2s cubic-bezier(0.4,0,0.2,1); min-height: 4px; overflow: hidden; }
.bar::after { content:''; position:absolute; top:0; left:0; right:0; height:35%; background:rgba(255,255,255,0.1); border-radius:inherit; }
.bar-blue   { background: linear-gradient(180deg, var(--accent-2), var(--accent)); }
.bar-gold   { background: linear-gradient(180deg, var(--gold-light), var(--gold)); }
.bar-green  { background: linear-gradient(180deg, #6bd4a0, var(--success)); }
.bar-red    { background: linear-gradient(180deg, #f0856a, var(--danger)); }
.bar-purple { background: linear-gradient(180deg, #b59af5, #7c5cda); }
.bar-cyan   { background: linear-gradient(180deg, #5cf0e0, #1bbdad); }
.bar-label  { font-size: 0.65rem; color: var(--text-muted); }

.donut-wrap { display: flex; align-items: center; gap: 24px; }
.donut-svg  { flex-shrink: 0; }
.donut-legend { display: flex; flex-direction: column; gap: 10px; }
.legend-item { display: flex; align-items: center; gap: 8px; font-size: 0.8rem; color: var(--text-light); }
.legend-dot  { width: 9px; height: 9px; border-radius: 50%; flex-shrink: 0; }
.legend-pct  { color: var(--text-muted); font-size: 0.72rem; }

.activity-card { background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: var(--radius); padding: 26px; backdrop-filter: blur(12px); margin-bottom: 22px; }
.activity-list { display: flex; flex-direction: column; }
.activity-item { display: flex; align-items: center; gap: 14px; padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,0.04); transition: all 0.2s; }
.activity-item:last-child { border-bottom: none; }
.activity-item:hover { background: rgba(255,255,255,0.02); border-radius: 8px; padding: 12px 10px; margin: 0 -10px; }
.activity-avatar { width: 34px; height: 34px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.78rem; font-weight: 700; flex-shrink: 0; color: #0a0e1a; }
.activity-info { flex: 1; }
.activity-name { font-size: 0.82rem; font-weight: 500; color: var(--text-light); }
.activity-book { font-size: 0.72rem; color: var(--text-muted); margin-top: 1px; }
.activity-badge { padding: 3px 9px; border-radius: 50px; font-size: 0.65rem; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; }
.badge-issued   { background: rgba(224,90,90,0.13);  color: var(--danger);  border: 1px solid rgba(224,90,90,0.2); }
.badge-returned { background: rgba(76,175,130,0.13); color: var(--success); border: 1px solid rgba(76,175,130,0.2); }
.badge-added    { background: rgba(201,168,76,0.13); color: var(--gold);    border: 1px solid rgba(201,168,76,0.2); }
.activity-time  { font-size: 0.68rem; color: var(--text-muted); flex-shrink: 0; }

/* =============================================
   ISSUE/RETURN PAGE
   ============================================= */
.issue-layout { display: grid; grid-template-columns: 1fr 360px; gap: 24px; padding-top: 36px; }
.issue-panel { background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: var(--radius); padding: 28px; backdrop-filter: blur(12px); }
.issue-panel-title { font-family: var(--font-display); font-size: 1.45rem; font-weight: 600; color: var(--cream); margin-bottom: 4px; }
.issue-panel-sub   { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 26px; }
.form-group { margin-bottom: 18px; }
.form-label { display: block; font-size: 0.74rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 7px; font-weight: 500; }
.form-control {
  width: 100%; background: rgba(255,255,255,0.04); border: 1px solid var(--glass-border);
  border-radius: 10px; padding: 11px 14px; color: var(--text-light);
  font-family: var(--font-body); font-size: 0.88rem; outline: none; transition: all var(--transition);
}
.form-control:focus { border-color: var(--gold-dim); background: rgba(201,168,76,0.04); box-shadow: 0 0 0 3px rgba(201,168,76,0.08); }
.form-control option { background: var(--navy-2); }

.book-preview {
  display: flex; align-items: center; gap: 13px;
  padding: 14px; background: rgba(255,255,255,0.03);
  border: 1px solid var(--glass-border); border-radius: 10px; margin-bottom: 18px;
  opacity: 0; transform: translateY(7px); transition: all 0.4s ease;
}
.book-preview.visible { opacity: 1; transform: translateY(0); }
.book-preview-thumb-ph { width: 40px; height: 54px; border-radius: 6px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; font-size: 0.55rem; font-family: var(--font-display); color: white; font-weight: 600; text-align: center; padding: 4px; }
.book-preview-title  { font-size: 0.85rem; font-weight: 600; color: var(--text-light); }
.book-preview-author { font-size: 0.72rem; color: var(--text-muted); margin-top: 1px; }
.book-preview-status { margin-top: 5px; font-size: 0.68rem; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; }
.book-preview-status.available { color: var(--success); }
.book-preview-status.issued    { color: var(--danger); }

.issue-table { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
.issue-table th { text-align: left; padding: 10px 14px; font-size: 0.66rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); border-bottom: 1px solid var(--glass-border); font-weight: 600; }
.issue-table td { padding: 13px 14px; border-bottom: 1px solid rgba(255,255,255,0.04); color: var(--text-light); vertical-align: middle; }
.issue-table tr:last-child td { border-bottom: none; }
.issue-table tr:hover td { background: rgba(255,255,255,0.02); }

.confirm-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.72); backdrop-filter: blur(8px); z-index: 500; align-items: center; justify-content: center; }
.confirm-overlay.show { display: flex; }
.confirm-box {
  background: var(--navy-2); border: 1px solid var(--glass-border); border-radius: 20px;
  padding: 36px; text-align: center; max-width: 340px; width: 90%;
  animation: popIn 0.4s cubic-bezier(0.34,1.56,0.64,1) forwards;
}
@keyframes popIn { from{opacity:0;transform:scale(0.82);} to{opacity:1;transform:scale(1);} }
.confirm-icon { width: 60px; height: 60px; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 18px; }
.confirm-icon.success { background: rgba(76,175,130,0.15); color: var(--success); }
.confirm-icon svg  { width: 30px; height: 30px; }
.confirm-title { font-family: var(--font-display); font-size: 1.55rem; color: var(--cream); margin-bottom: 7px; }
.confirm-msg   { font-size: 0.82rem; color: var(--text-muted); line-height: 1.65; }

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 900px) {
  .sidebar { top: auto; bottom: 14px; left: 50%; transform: translateX(-50%); flex-direction: row; border-radius: 50px; padding: 10px 14px; }
  .sidebar-logo { display: none; }
  .sidebar-divider { width: 1px; height: 26px; }
  .nav-tooltip { display: none; }
  .main-content { margin-left: 0; padding: 18px 14px 90px; }
  footer { margin-left: 0; flex-direction: column; text-align: center; }
  .charts-row { grid-template-columns: 1fr; }
  .issue-layout { grid-template-columns: 1fr; }
  .features-strip { padding: 40px 18px; }
  .institution-section { padding: 40px 18px; }
  .stats-ribbon { padding: 28px 18px; gap: 28px; }
}
@media (max-width: 600px) {
  .book-grid { grid-template-columns: repeat(auto-fill, minmax(155px,1fr)); gap: 14px; }
  .book-card { height: 275px; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .top-bar { right: 10px; top: 10px; }
  .gallery-header { flex-direction: column; align-items: stretch; }
  .search-wrap { max-width: none; }
  .pcte-badge { flex-direction: column; text-align: center; }
}

/* ─── Additional: Gallery branch/sem filters ──────────────── */
.gallery-controls { display: flex; flex-direction: column; gap: 14px; margin-bottom: 28px; }

.filter-row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.filter-row-label { font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--gold-dim); font-weight: 600; min-width: 60px; }

.branch-btn {
  padding: 7px 18px; border-radius: 50px;
  border: 1px solid var(--glass-border); background: var(--glass-bg);
  color: var(--text-muted); font-size: 0.78rem; letter-spacing: 0.06em; font-weight: 600;
  cursor: pointer; transition: all var(--transition); text-transform: uppercase;
}
.branch-btn:hover { border-color: var(--gold-dim); color: var(--gold); }
.branch-btn.active { background: rgba(201,168,76,0.16); border-color: var(--gold); color: var(--gold); }

.branch-btn[data-branch="CSE"].active  { background: rgba(74,144,217,0.16); border-color: #4a90d9; color: #6db8f5; }
.branch-btn[data-branch="ME"].active   { background: rgba(224,90,90,0.14);  border-color: #e05a5a; color: #f0856a; }
.branch-btn[data-branch="CE"].active   { background: rgba(76,175,130,0.14); border-color: #4caf82; color: #6bd4a0; }
.branch-btn[data-branch="BCA"].active  { background: rgba(189,100,226,0.14);border-color: #bd64e2; color: #d48cf5; }

.sem-btn {
  padding: 5px 13px; border-radius: 50px;
  border: 1px solid var(--glass-border); background: var(--glass-bg);
  color: var(--text-muted); font-size: 0.73rem; font-weight: 600;
  cursor: pointer; transition: all var(--transition);
}
.sem-btn:hover { border-color: var(--gold-dim); color: var(--gold); }
.sem-btn.active { background: rgba(201,168,76,0.14); border-color: var(--gold); color: var(--gold); }

.result-count {
  font-size: 0.76rem; color: var(--text-muted); letter-spacing: 0.04em;
  padding: 5px 12px; background: var(--glass-bg); border: 1px solid var(--glass-border);
  border-radius: 50px; margin-left: auto;
}

/* ─── Book card: cover image ──────────────────────────────── */
.book-cover-wrap { position: relative; width: 100%; height: 215px; overflow: hidden; }
.book-cover-img  { width: 100%; height: 100%; object-fit: cover; object-position: center top; display: block; transition: transform 0.5s ease; }
.book-card:hover .book-cover-img { transform: scale(1.04); }
.book-cover-wrap .book-cover-placeholder { position: absolute; inset: 0; width: 100%; height: 100%; }

/* Branch badge on card */
.book-branch-badge {
  display: inline-block;
  font-size: 0.62rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--gold-dim); margin-bottom: 2px;
}

/* Read Online button */
.btn-sm-read {
  flex: 1; padding: 8px 10px; border-radius: 8px;
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.03em;
  text-align: center; cursor: pointer; display: block;
  background: rgba(74,144,217,0.18); border: 1px solid rgba(74,144,217,0.3);
  color: #6db8f5; text-decoration: none;
  transition: all var(--transition);
}
.btn-sm-read:hover { background: rgba(74,144,217,0.28); transform: translateY(-1px); }

/* Landing stats update */
.stat-number[data-target] { display: block; }