/* ============================================================
   BIBLIOTECA FD — Unified Design System
   Glassmorphism + Deep Blue + Mobile-First
   ============================================================ */

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

/* ── Variables ─────────────────────────────────────────────── */
:root {
  /* Blue palette */
  --b1: #0a4f72;
  --b2: #07405e;
  --b3: #053450;
  --b4: #022840;
  --b5: #011c30;
  --b6: #000e1a;

  /* Accents */
  --accent: #38bdf8;
  --accent2: #7dd3fc;
  --gold: #f0c040;
  --danger: #ef4444;
  --success: #22c55e;

  /* Glass */
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-bg-md: rgba(255, 255, 255, 0.10);
  --glass-bg-strong: rgba(255, 255, 255, 0.15);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-border-hover: rgba(56, 189, 248, 0.4);
  --blur: blur(18px);
  --blur-sm: blur(8px);

  /* Text */
  --text-primary: #f0f6ff;
  --text-secondary: rgba(240, 246, 255, 0.65);
  --text-muted: rgba(240, 246, 255, 0.38);

  /* Surfaces */
  --surface: rgba(2, 40, 64, 0.7);
  --surface-hover: rgba(7, 64, 94, 0.75);

  /* Shadows */
  --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 24px rgba(56, 189, 248, 0.2);

  /* Layout */
  --nav-h: 64px;
  --bottom-nav-h: 68px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --duration: 0.3s;
}

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

html {
  scroll-behavior: smooth;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--b6);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* Animated gradient background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(10, 79, 114, 0.45) 0%, transparent 60%),
    radial-gradient(ellipse 60% 80% at 80% 90%, rgba(3, 52, 80, 0.5) 0%, transparent 55%),
    radial-gradient(ellipse 40% 40% at 50% 50%, rgba(56, 189, 248, 0.04) 0%, transparent 70%),
    linear-gradient(160deg, var(--b6) 0%, #001528 50%, var(--b6) 100%);
  z-index: -2;
  pointer-events: none;
}

/* Subtle noise texture */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.025'/%3E%3C/svg%3E");
  z-index: -1;
  pointer-events: none;
  opacity: 0.4;
}

/* ── Typography ─────────────────────────────────────────────── */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: 'Sora', sans-serif;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

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

/* ── Scrollbar ──────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 5px;
}

::-webkit-scrollbar-track {
  background: var(--b6);
}

::-webkit-scrollbar-thumb {
  background: var(--b1);
  border-radius: 10px;
}

/* ── Glass Utility ──────────────────────────────────────────── */
.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
}

.glass-md {
  background: var(--glass-bg-md);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
}

.glass-strong {
  background: var(--glass-bg-strong);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

/* ── TOP NAVBAR (Desktop) ───────────────────────────────────── */
.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 1000;
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  background: rgba(0, 14, 26, 0.75);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-bottom: 1px solid var(--glass-border);
  transition: background var(--duration) var(--ease);
}

.top-nav.scrolled {
  background: rgba(0, 14, 26, 0.95);
  box-shadow: var(--shadow-md);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: 'Sora', sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.nav-brand img {
  height: 36px;
  width: auto;
}

.nav-brand span {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: auto;
  list-style: none;
}

.nav-links a,
.nav-links button {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  transition: all var(--duration) var(--ease);
  font-family: 'DM Sans', sans-serif;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links button:hover {
  color: var(--text-primary);
  background: var(--glass-bg);
}

.nav-links .btn-nav-primary {
  background: linear-gradient(135deg, var(--b1), var(--b2));
  color: var(--text-primary);
  border: 1px solid rgba(56, 189, 248, 0.3);
  box-shadow: var(--shadow-glow);
}

.nav-links .btn-nav-primary:hover {
  background: linear-gradient(135deg, var(--accent), var(--b1));
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 0 32px rgba(56, 189, 248, 0.35);
}

.nav-links .btn-nav-warn {
  background: rgba(240, 192, 64, 0.15);
  color: var(--gold);
  border: 1px solid rgba(240, 192, 64, 0.3);
}

.nav-links .btn-nav-warn:hover {
  background: rgba(240, 192, 64, 0.25);
  transform: translateY(-1px);
}

/* User pill */
.user-pill {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  cursor: pointer;
  transition: all var(--duration) var(--ease);
  position: relative;
}

.user-pill:hover {
  background: var(--glass-bg-md);
  border-color: var(--glass-border-hover);
}

.user-pill .avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--b1), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff;
}

.user-pill .uname {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Dropdown */
.dropdown-menu-fd {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 200px;
  background: rgba(2, 40, 64, 0.95);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0.5rem;
  opacity: 0;
  transform: translateY(-8px) scale(0.97);
  pointer-events: none;
  transition: all 0.2s var(--ease);
  z-index: 999;
}

.dropdown-menu-fd.open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.dropdown-menu-fd .dd-header {
  padding: 0.5rem 0.75rem 0.75rem;
  border-bottom: 1px solid var(--glass-border);
  margin-bottom: 0.4rem;
}

.dropdown-menu-fd .dd-header small {
  color: var(--text-muted);
  font-size: 0.75rem;
}

.dropdown-menu-fd .dd-header strong {
  display: block;
  color: var(--text-primary);
  font-size: 0.9rem;
  margin-top: 0.1rem;
}

.dropdown-menu-fd a,
.dropdown-menu-fd button {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  transition: all 0.15s;
  font-family: 'DM Sans', sans-serif;
  text-align: left;
}

.dropdown-menu-fd a:hover,
.dropdown-menu-fd button:hover {
  background: var(--glass-bg-md);
  color: var(--text-primary);
}

.dropdown-menu-fd .dd-divider {
  height: 1px;
  background: var(--glass-border);
  margin: 0.4rem 0;
}

/* Mobile hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
  background: none;
  border: none;
  margin-left: auto;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all 0.3s var(--ease);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile side drawer */
.side-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  bottom: 0;
  width: min(300px, 85vw);
  background: rgba(1, 28, 48, 0.97);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-left: 1px solid var(--glass-border);
  z-index: 1100;
  padding: 1.5rem 1rem;
  transition: right 0.35s var(--ease);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  overflow-y: auto;
}

.side-drawer.open {
  right: 0;
}

.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 1099;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.drawer-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--glass-border);
  margin-bottom: 0.5rem;
}

.drawer-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1rem;
  transition: all 0.2s;
}

.drawer-close:hover {
  background: var(--glass-bg-md);
  color: var(--text-primary);
}

.drawer-user {
  padding: 0.75rem;
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  margin-bottom: 0.75rem;
}

.drawer-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.7rem 0.85rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.2s;
  cursor: pointer;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  font-family: 'DM Sans', sans-serif;
}

.drawer-link:hover,
.drawer-link.active {
  background: var(--glass-bg-md);
  color: var(--text-primary);
}

.drawer-link i {
  width: 18px;
  text-align: center;
  color: var(--accent);
}

.drawer-divider {
  height: 1px;
  background: var(--glass-border);
  margin: 0.4rem 0;
}

/* ── BOTTOM NAV (Mobile only) ───────────────────────────────── */
.bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--bottom-nav-h);
  z-index: 1000;
  background: rgba(1, 22, 40, 0.9);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-top: 1px solid var(--glass-border);
  padding: 0 0.5rem;
  align-items: center;
  justify-content: space-around;
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.65rem;
  font-weight: 500;
  cursor: pointer;
  background: none;
  border: none;
  transition: all 0.2s var(--ease);
  text-decoration: none;
  font-family: 'DM Sans', sans-serif;
  flex: 1;
}

.bottom-nav-item i {
  font-size: 1.15rem;
}

.bottom-nav-item.active,
.bottom-nav-item:hover {
  color: var(--accent);
}

/* Center FAB button */
.bottom-nav-fab {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  flex: 1;
}

.fab-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--b1));
  border: 3px solid var(--b6);
  color: #fff;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(56, 189, 248, 0.4), 0 0 0 0 rgba(56, 189, 248, 0.3);
  transform: translateY(-10px);
  transition: all 0.3s var(--ease);
  animation: fab-pulse 2.5s ease-in-out infinite;
}

.fab-btn:hover {
  transform: translateY(-12px) scale(1.08);
  box-shadow: 0 8px 28px rgba(56, 189, 248, 0.5);
}

.fab-label {
  font-size: 0.62rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-top: -2px;
}

@keyframes fab-pulse {

  0%,
  100% {
    box-shadow: 0 4px 20px rgba(56, 189, 248, 0.4), 0 0 0 0 rgba(56, 189, 248, 0.3);
  }

  50% {
    box-shadow: 0 4px 20px rgba(56, 189, 248, 0.4), 0 0 0 8px rgba(56, 189, 248, 0);
  }
}

/* ── MAIN CONTENT ───────────────────────────────────────────── */
main {
  padding-top: var(--nav-h);
  min-height: 100vh;
}

/* ── HERO ───────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: clamp(480px, 70vh, 680px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: 2rem 1.5rem;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 120% 80% at 50% 0%, rgba(10, 79, 114, 0.6) 0%, transparent 65%),
    linear-gradient(180deg, rgba(0, 14, 26, 0.3) 0%, var(--b6) 100%);
  z-index: 0;
}

/* Floating orbs */
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.2;
  pointer-events: none;
  animation: orb-float 8s ease-in-out infinite;
}

.hero-orb-1 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--b1), transparent);
  top: -100px;
  left: -100px;
  animation-delay: 0s;
}

.hero-orb-2 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--accent), transparent);
  bottom: -50px;
  right: -50px;
  animation-delay: -4s;
  opacity: 0.1;
}

@keyframes orb-float {

  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }

  33% {
    transform: translate(30px, -20px) scale(1.05);
  }

  66% {
    transform: translate(-20px, 30px) scale(0.95);
  }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 1.25rem;
  letter-spacing: 0.02em;
}

.hero-title {
  font-size: clamp(1.8rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #fff 30%, var(--accent2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(0.95rem, 2.5vw, 1.15rem);
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-weight: 300;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-muted);
  font-size: 0.75rem;
  animation: bounce-scroll 2s ease-in-out infinite;
  z-index: 1;
}

.scroll-indicator i {
  font-size: 1.1rem;
}

@keyframes bounce-scroll {

  0%,
  100% {
    transform: translateX(-50%) translateY(0);
  }

  50% {
    transform: translateX(-50%) translateY(6px);
  }
}

/* ── BUTTONS ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.65rem 1.35rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  font-family: 'DM Sans', sans-serif;
  cursor: pointer;
  border: none;
  transition: all var(--duration) var(--ease);
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--b1) 0%, var(--accent) 100%);
  color: #fff;
  box-shadow: 0 4px 16px rgba(56, 189, 248, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(56, 189, 248, 0.4);
  color: #fff;
}

.btn-glass {
  background: var(--glass-bg);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--blur-sm);
}

.btn-glass:hover {
  background: var(--glass-bg-md);
  border-color: var(--glass-border-hover);
  transform: translateY(-2px);
  color: var(--text-primary);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.25);
  transform: translateY(-1px);
}

.btn-success {
  background: rgba(34, 197, 94, 0.15);
  color: var(--success);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.btn-success:hover {
  background: rgba(34, 197, 94, 0.25);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
}

.btn-lg {
  padding: 0.85rem 1.75rem;
  font-size: 1rem;
}

/* ── SEARCH & FILTER SECTION ────────────────────────────────── */
.search-section {
  padding: 1.5rem;
  background: rgba(0, 14, 26, 0.5);
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: var(--nav-h);
  z-index: 100;
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
}

.search-bar {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  max-width: 860px;
  margin: 0 auto;
  flex-wrap: wrap;
}

.search-input-wrap {
  flex: 1;
  min-width: 200px;
  position: relative;
}

.search-input-wrap i {
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.85rem;
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 0.65rem 0.9rem 0.65rem 2.25rem;
  border-radius: var(--radius-sm);
  background: var(--glass-bg-md);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: 'DM Sans', sans-serif;
  transition: all var(--duration);
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-input:focus {
  outline: none;
  border-color: rgba(56, 189, 248, 0.5);
  background: var(--glass-bg-strong);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.1);
}

.search-select {
  padding: 0.65rem 2rem 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  background: var(--glass-bg-md);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-family: 'DM Sans', sans-serif;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='rgba(240,246,255,0.5)' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.7rem center;
  transition: all var(--duration);
  min-width: 130px;
}

.search-select:focus {
  outline: none;
  border-color: rgba(56, 189, 248, 0.5);
}

.search-select option {
  background: var(--b4);
  color: var(--text-primary);
}

/* Stats bar */
.stats-bar {
  max-width: 860px;
  margin: 0.6rem auto 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.stats-bar strong {
  color: var(--accent);
}

/* ── BOOKS SECTION ──────────────────────────────────────────── */
.books-section {
  padding: 2.5rem 1.5rem;
  max-width: 1400px;
  margin: 0 auto;
}

.section-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.section-title {
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  font-weight: 700;
  background: linear-gradient(135deg, var(--text-primary), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--glass-border), transparent);
}

/* Grid */
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem;
}

/* ── BOOK CARD ──────────────────────────────────────────────── */
.book-card {
  background: var(--glass-bg);
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.35s var(--ease);
  position: relative;
  animation: card-in 0.5s var(--ease) both;
}

.book-card:hover {
  transform: translateY(-6px);
  border-color: var(--glass-border-hover);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  background: var(--glass-bg-md);
}

@keyframes card-in {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.book-cover {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  display: block;
  transition: transform 0.4s var(--ease);
}

.book-card:hover .book-cover {
  transform: scale(1.04);
}

.book-cover-wrap {
  position: relative;
  overflow: hidden;
}

/* Like button on card */
.card-like-btn {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(0, 14, 26, 0.7);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s var(--ease);
  z-index: 2;
}

.card-like-btn:hover,
.card-like-btn.liked {
  color: #ef4444;
  background: rgba(239, 68, 68, 0.2);
  border-color: rgba(239, 68, 68, 0.4);
  transform: scale(1.1);
}

.card-like-btn.liked {
  color: #ef4444;
}

.book-info {
  padding: 0.9rem;
}

.book-title-card {
  font-family: 'Sora', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 0.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.book-author-card {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.book-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.book-genre-tag {
  display: inline-block;
  padding: 0.18rem 0.55rem;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.2);
  font-size: 0.68rem;
  color: var(--accent);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 110px;
}

.book-likes-count {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.book-likes-count i {
  font-size: 0.7rem;
  color: #ef4444;
}

/* Empty state */
.empty-state {
  grid-column: 1/-1;
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-muted);
}

.empty-state i {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.4;
}

.empty-state h3 {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.empty-state p {
  font-size: 0.9rem;
}

/* ── MODALS ─────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(6px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease);
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background: rgba(2, 40, 64, 0.95);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 640px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(20px) scale(0.97);
  transition: transform 0.3s var(--ease);
  scrollbar-width: thin;
  scrollbar-color: var(--b1) transparent;
}

.modal-overlay.open .modal {
  transform: translateY(0) scale(1);
}

.modal-lg {
  max-width: 820px;
}

.modal-sm {
  max-width: 440px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 1.5rem 0;
  margin-bottom: 0;
}

.modal-title-fd {
  font-family: 'Sora', sans-serif;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1rem;
  transition: all 0.2s;
  flex-shrink: 0;
}

.modal-close:hover {
  background: var(--glass-bg-md);
  color: var(--text-primary);
}

.modal-body {
  padding: 1.5rem;
}

.modal-footer-fd {
  padding: 1rem 1.5rem 1.5rem;
  display: flex;
  gap: 0.6rem;
  justify-content: flex-end;
  flex-wrap: wrap;
  border-top: 1px solid var(--glass-border);
  margin-top: 1rem;
}

/* Book detail modal layout */
.modal-book-layout {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 1.5rem;
}

.modal-book-cover {
  width: 100%;
  border-radius: var(--radius-md);
  aspect-ratio: 2/3;
  object-fit: cover;
  border: 1px solid var(--glass-border);
}

.modal-book-info h2 {
  font-size: clamp(1rem, 3vw, 1.4rem);
  margin-bottom: 0.35rem;
  color: var(--text-primary);
}

.modal-book-meta {
  list-style: none;
  margin-bottom: 0.75rem;
}

.modal-book-meta li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.2rem;
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
}

.modal-book-meta strong {
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.modal-book-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
  border-top: 1px solid var(--glass-border);
  padding-top: 0.75rem;
  margin-top: 0.75rem;
}

.modal-like-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.like-btn-large {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
  font-family: 'DM Sans', sans-serif;
}

.like-btn-large:hover,
.like-btn-large.liked {
  color: #ef4444;
  border-color: rgba(239, 68, 68, 0.4);
  background: rgba(239, 68, 68, 0.1);
}

.like-btn-large i {
  font-size: 0.9rem;
}

/* ── FORMS ──────────────────────────────────────────────────── */
.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
  letter-spacing: 0.02em;
}

.form-control {
  width: 100%;
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-sm);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: 'DM Sans', sans-serif;
  transition: all var(--duration);
}

.form-control::placeholder {
  color: var(--text-muted);
}

.form-control:focus {
  outline: none;
  border-color: rgba(56, 189, 248, 0.5);
  background: var(--glass-bg-md);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.1);
}

.form-control-file {
  width: 100%;
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-sm);
  background: var(--glass-bg);
  border: 1px dashed rgba(56, 189, 248, 0.3);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-family: 'DM Sans', sans-serif;
  cursor: pointer;
  transition: all var(--duration);
}

.form-control-file:hover {
  border-color: rgba(56, 189, 248, 0.6);
  background: var(--glass-bg-md);
}

textarea.form-control {
  resize: vertical;
  min-height: 80px;
}

select.form-control {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='rgba(240,246,255,0.4)' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2rem;
}

select.form-control option {
  background: var(--b4);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
}

/* ── MANAGE PULLS ───────────────────────────────────────────── */
.admin-section {
  max-width: 1100px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

.admin-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--glass-border);
}

.admin-header h1 {
  font-size: 1.5rem;
  background: linear-gradient(135deg, #fff, var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.pulls-grid {
  display: grid;
  gap: 1rem;
}

.pull-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  backdrop-filter: var(--blur-sm);
  overflow: hidden;
  transition: all var(--duration);
}

.pull-card:hover {
  border-color: var(--glass-border-hover);
  box-shadow: var(--shadow-sm);
}

.pull-card-inner {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem;
}

.pull-cover {
  width: 80px;
  aspect-ratio: 2/3;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
}

.pull-info h3 {
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.pull-info p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.pull-actions {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  align-items: flex-end;
}

/* ── AUTH PAGES ─────────────────────────────────────────────── */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}

.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--glass-bg-md);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-lg);
}

.auth-logo {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-logo img {
  height: 48px;
  margin-bottom: 0.75rem;
}

.auth-logo h1 {
  font-size: 1.4rem;
  background: linear-gradient(135deg, #fff, var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.auth-logo p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* ── TOAST NOTIFICATIONS ────────────────────────────────────── */
.toast-container {
  position: fixed;
  top: calc(var(--nav-h) + 1rem);
  right: 1rem;
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  background: rgba(2, 40, 64, 0.95);
  backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
  min-width: 260px;
  max-width: 340px;
  pointer-events: auto;
  animation: toast-in 0.35s var(--ease) both;
  font-size: 0.875rem;
  color: var(--text-primary);
}

.toast.toast-success {
  border-color: rgba(34, 197, 94, 0.4);
}

.toast.toast-error {
  border-color: rgba(239, 68, 68, 0.4);
}

.toast.toast-warning {
  border-color: rgba(240, 192, 64, 0.4);
}

.toast i {
  font-size: 1rem;
}

.toast.toast-success i {
  color: var(--success);
}

.toast.toast-error i {
  color: var(--danger);
}

.toast.toast-warning i {
  color: var(--gold);
}

.toast-out {
  animation: toast-out 0.3s var(--ease) forwards;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateX(20px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes toast-out {
  to {
    opacity: 0;
    transform: translateX(20px);
    max-height: 0;
    padding: 0;
    margin: 0;
  }
}

/* ── FOOTER ─────────────────────────────────────────────────── */
footer {
  background: rgba(0, 8, 16, 0.8);
  border-top: 1px solid var(--glass-border);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.82rem;
}

footer a {
  color: var(--accent);
}

/* ── SUMMARY GUIDE MODAL ────────────────────────────────────── */
.step-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.step-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  text-align: center;
}

.step-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--b1), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 0.75rem;
  font-size: 1.2rem;
  color: #fff;
}

.step-card h6 {
  font-family: 'Sora', sans-serif;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.step-card p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.prompt-box {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  font-size: 0.78rem;
  color: var(--accent2);
  line-height: 1.55;
  margin: 0.75rem 0;
  text-align: left;
  font-family: monospace;
}

/* ── LOADING SKELETON ───────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg, var(--glass-bg) 25%, var(--glass-bg-md) 50%, var(--glass-bg) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer {
  to {
    background-position: -200% 0;
  }
}

.skeleton-card {
  height: 320px;
  border-radius: var(--radius-md);
}

/* ── BADGE ──────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
}

.badge-admin {
  background: rgba(240, 192, 64, 0.15);
  color: var(--gold);
  border: 1px solid rgba(240, 192, 64, 0.3);
}

/* ── UTILITY ────────────────────────────────────────────────── */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.text-center {
  text-align: center;
}

.text-accent {
  color: var(--accent);
}

.mt-auto {
  margin-top: auto;
}

.d-flex {
  display: flex;
}

.align-center {
  align-items: center;
}

.gap-sm {
  gap: 0.5rem;
}

.w-100 {
  width: 100%;
}

/* ── RESPONSIVE ─────────────────────────────────────────────── */
@media (max-width: 768px) {
  :root {
    --nav-h: 56px;
  }

  /* Show bottom nav + hide desktop links */
  .bottom-nav {
    display: flex;
  }

  .nav-links {
    display: none !important;
  }

  .hamburger {
    display: flex;
  }

  /* Push content above bottom nav */
  main {
    padding-bottom: var(--bottom-nav-h);
  }

  footer {
    padding-bottom: calc(var(--bottom-nav-h) + 1rem);
  }

  /* Search bar stacked */
  .search-section {
    padding: 0.85rem;
    top: var(--nav-h);
  }

  .search-bar {
    gap: 0.5rem;
  }

  .search-select {
    min-width: 0;
    flex: 1;
  }

  /* Books grid: 2 cols */
  .books-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }

  .books-section {
    padding: 1.25rem 0.85rem;
  }

  /* Book detail modal: stack */
  .modal-book-layout {
    grid-template-columns: 1fr;
  }

  .modal-book-cover {
    max-width: 140px;
    margin: 0 auto;
  }

  /* Form row: single col */
  .form-row {
    grid-template-columns: 1fr;
  }

  /* Modal full-screen on mobile */
  .modal-overlay {
    padding: 0;
    align-items: flex-end;
  }

  .modal {
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    max-height: 90vh;
    max-width: 100%;
  }

  /* Pull card */
  .pull-card-inner {
    grid-template-columns: 60px 1fr;
  }

  .pull-actions {
    grid-column: 1/-1;
    flex-direction: row;
    justify-content: flex-end;
    flex-wrap: wrap;
  }

  /* Step cards: 1 col */
  .step-cards {
    grid-template-columns: 1fr;
  }

  .auth-card {
    padding: 2rem 1.5rem;
  }

  .modal-footer-fd {
    justify-content: stretch;
  }

  .modal-footer-fd .btn {
    flex: 1;
    justify-content: center;
  }
}

@media (max-width: 400px) {
  .books-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0.6rem;
  }

  .book-info {
    padding: 0.65rem;
  }

  .book-title-card {
    font-size: 0.8rem;
  }

  .book-author-card {
    font-size: 0.72rem;
  }
}

@media (min-width: 769px) {
  .hamburger {
    display: none;
  }

  .bottom-nav {
    display: none;
  }
}

@media (min-width: 1200px) {
  .books-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  }
}