/* ===================================================================
   MAKTABAH LIPIA — DESIGN SYSTEM
   Based on design.md specification
   Version: 1.0
   =================================================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;700&display=swap');

/* ===================================================================
   DESIGN TOKENS
   =================================================================== */
:root {
  /* Brand Accent (stripe only — never as background fills) */
  --lipia-blue:  #0033A0;
  --lipia-green: #006C35;
  --lipia-gold:  #C5A95E;

  /* Surfaces */
  --canvas:           #000000;
  --surface-soft:     #0d0d0d;
  --surface-card:     #1a1a1a;
  --surface-elevated: #262626;

  /* Borders */
  --hairline:        #3c3c3c;
  --hairline-strong: #262626;

  /* Text */
  --on-dark:    #ffffff;
  --body:       #bbbbbb;
  --body-strong:#e6e6e6;
  --muted:      #7e7e7e;

  /* Typography */
  --font: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Spacing (base 4px) */
  --sp-xxs:     4px;
  --sp-xs:      8px;
  --sp-sm:      12px;
  --sp-md:      16px;
  --sp-lg:      24px;
  --sp-xl:      40px;
  --sp-xxl:     64px;
  --sp-section: 96px;

  /* Radii */
  --r-none: 0px;
  --r-full: 9999px;

  /* Nav */
  --nav-h: 80px;
}

/* ===================================================================
   RESET & BASE
   =================================================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 16px;
  font-weight: 300;
  line-height: 1.5;
  color: var(--body);
  background: var(--canvas);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img  { display: block; max-width: 100%; height: auto; }
a    { color: inherit; text-decoration: none; }
ul   { list-style: none; }
button { cursor: pointer; font-family: var(--font); }

/* ===================================================================
   LAYOUT
   =================================================================== */
.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--sp-lg);
}

/* Page offset for fixed nav + stripe (80px + 4px) */
.page-body { padding-top: calc(var(--nav-h) + 4px); }

/* ===================================================================
   LIPIA STRIPE DIVIDER
   =================================================================== */
.lipia-stripe {
  display: block;
  width: 100%;
  height: 4px;
  background: linear-gradient(
    to right,
    var(--lipia-blue)  0%   33.33%,
    var(--lipia-green) 33.33% 66.66%,
    var(--lipia-gold)  66.66% 100%
  );
  flex-shrink: 0;
}

/* ===================================================================
   TOP NAVIGATION
   =================================================================== */
.top-nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1000;
  height: var(--nav-h);
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  display: flex;
  align-items: center;
  transition: border-color .2s;
}
.top-nav.scrolled { border-bottom-color: var(--hairline-strong); }

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--sp-lg);
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  flex-shrink: 0;
}
.nav-logo img {
  height: 46px;
  width: auto;
  object-fit: contain;
  filter: brightness(0) invert(1);
}
.nav-logo-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.nav-logo-text span {
  font-size: 10px;
  font-weight: 300;
  color: var(--muted);
  letter-spacing: 2px;
  text-transform: uppercase;
  line-height: 1.2;
}
.nav-logo-text strong {
  font-size: 14px;
  font-weight: 700;
  color: var(--on-dark);
  letter-spacing: 3px;
  text-transform: uppercase;
}

/* Nav links */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-xl);
}
.nav-link {
  font-size: 13px;
  font-weight: 400;
  color: var(--muted);
  letter-spacing: .5px;
  text-transform: uppercase;
  transition: color .2s;
  white-space: nowrap;
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0; right: 0;
  height: 1px;
  background: var(--on-dark);
  transform: scaleX(0);
  transition: transform .2s;
}
.nav-link:hover,
.nav-link.active { color: var(--on-dark); }
.nav-link:hover::after,
.nav-link.active::after { transform: scaleX(1); }

/* Hamburger */
.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: var(--sp-xs);
  cursor: pointer;
}
.nav-burger span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--on-dark);
  transition: all .3s;
  transform-origin: center;
}
.nav-burger.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-burger.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ===================================================================
   HERO BANDS
   =================================================================== */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--canvas);
}
.hero--home    { min-height: 640px; display: flex; align-items: flex-end; }
.hero--faculty { min-height: 440px; display: flex; align-items: flex-end; }

.hero__photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(0,0,0,.90) 0%,
    rgba(0,0,0,.55) 45%,
    rgba(0,0,0,.20) 100%
  );
}
.hero__content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: var(--sp-xxl) var(--sp-lg);
}
.hero__eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--lipia-gold);
  margin-bottom: var(--sp-sm);
}
.hero__title {
  font-size: 80px;
  font-weight: 700;
  line-height: 1;
  text-transform: uppercase;
  color: var(--on-dark);
  max-width: 820px;
}
.hero__subtitle {
  font-size: 16px;
  font-weight: 300;
  color: var(--body-strong);
  margin-top: var(--sp-lg);
  max-width: 480px;
  line-height: 1.65;
}

/* ===================================================================
   SECTIONS
   =================================================================== */
.section        { padding: var(--sp-section) 0; }
.section--soft  { background: var(--surface-soft); }

.section__header { margin-bottom: var(--sp-xxl); }
.section__eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--sp-sm);
}
.section__title {
  font-size: 56px;
  font-weight: 700;
  line-height: 1.05;
  text-transform: uppercase;
  color: var(--on-dark);
}

/* ===================================================================
   FACULTY CARDS (Home page — 4-up)
   =================================================================== */
.faculty-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-lg);
}

.faculty-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--r-none);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: border-color .25s;
}
.faculty-card:hover { border-color: var(--on-dark); }
.faculty-card:hover .faculty-card__photo img { transform: scale(1.04); }

.faculty-card__photo {
  aspect-ratio: 4/3;
  overflow: hidden;
  position: relative;
}
.faculty-card__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .55s ease;
}
.faculty-card__photo-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.5) 0%, transparent 60%);
}

/* Faculty accent bars */
.faculty-card__accent { height: 3px; }
.accent--syariah  { background: linear-gradient(to right, var(--lipia-blue), var(--lipia-green)); }
.accent--lughoh   { background: linear-gradient(to right, var(--lipia-green), var(--lipia-gold)); }
.accent--idary    { background: linear-gradient(to right, var(--lipia-blue), var(--lipia-gold)); }
.accent--iqtisod  { background: linear-gradient(to right, var(--lipia-gold), var(--lipia-blue)); }
.accent--idad     { background: var(--lipia-gold); }

.faculty-card__body {
  padding: var(--sp-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--sp-xs);
}
.faculty-card__tag {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
}
.faculty-card__name {
  font-size: 22px;
  font-weight: 700;
  color: var(--on-dark);
  line-height: 1.2;
}
.faculty-card__desc {
  font-size: 13px;
  font-weight: 300;
  color: var(--body);
  line-height: 1.55;
  flex: 1;
  margin-top: var(--sp-xxs);
}
.faculty-card__cta {
  display: flex;
  align-items: center;
  gap: var(--sp-xs);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--on-dark);
  margin-top: var(--sp-md);
  transition: gap .2s;
}
.faculty-card:hover .faculty-card__cta { gap: var(--sp-sm); }

/* ===================================================================
   SEMESTER CARDS
   =================================================================== */
.semester-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-lg);
}

.semester-card {
  background: var(--canvas);
  border: 1px solid var(--hairline);
  padding: var(--sp-xl) var(--sp-lg);
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: border-color .2s, background .2s;
}
.semester-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--lipia-blue), var(--lipia-green), var(--lipia-gold));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s ease;
}
.semester-card:hover {
  border-color: var(--hairline-strong);
  background: var(--surface-soft);
}
.semester-card:hover::before { transform: scaleX(1); }

.semester-card__label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
}
.semester-card__num {
  font-size: 56px;
  font-weight: 700;
  line-height: 1;
  color: var(--on-dark);
}
.semester-card__link {
  display: flex;
  align-items: center;
  gap: var(--sp-xs);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--on-dark);
  margin-top: auto;
  padding-top: var(--sp-lg);
  transition: gap .2s;
}
.semester-card:hover .semester-card__link { gap: var(--sp-sm); }

/* ===================================================================
   BRANCH SPLIT (Idary → Idary Lanjut + Iqtisod)
   =================================================================== */
.branch-split {
  border-top: 1px solid var(--hairline);
  padding-top: var(--sp-section);
  margin-top: var(--sp-section);
}
.branch-split__header { margin-bottom: var(--sp-xxl); }
.branch-split__eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--sp-sm);
}
.branch-split__title {
  font-size: 40px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--on-dark);
}
.branch-split__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-lg);
}

.branch-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  padding: var(--sp-xl);
  display: flex;
  flex-direction: column;
  gap: var(--sp-md);
  cursor: pointer;
  transition: border-color .2s;
}
.branch-card:hover { border-color: var(--on-dark); }
.branch-card:hover .branch-card__cta { gap: var(--sp-sm); }

.branch-card__accent { height: 3px; width: 48px; margin-bottom: var(--sp-xs); }
.branch-card__title {
  font-size: 32px;
  font-weight: 700;
  color: var(--on-dark);
  line-height: 1.1;
}
.branch-card__sub {
  font-size: 13px;
  font-weight: 300;
  color: var(--muted);
  letter-spacing: .5px;
  text-transform: uppercase;
}
.branch-card__desc {
  font-size: 14px;
  font-weight: 300;
  color: var(--body);
  line-height: 1.6;
}
.branch-card__sem-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-xs);
}
.branch-card__sem-link {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--hairline);
  padding: 4px 10px;
  transition: all .2s;
}
.branch-card__sem-link:hover {
  color: var(--on-dark);
  border-color: var(--on-dark);
}
.branch-card__cta {
  display: flex;
  align-items: center;
  gap: var(--sp-xs);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--on-dark);
  margin-top: auto;
  padding-top: var(--sp-lg);
  transition: gap .2s;
}

/* ===================================================================
   CTA DOWNLOAD ALL BAND
   =================================================================== */
.cta-band {
  background: var(--surface-soft);
  border-bottom: 1px solid var(--hairline);
  padding: var(--sp-xxl) 0;
}
.cta-band__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-xl);
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--sp-lg);
}
.cta-band__eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--sp-sm);
}
.cta-band__title {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.1;
  text-transform: uppercase;
  color: var(--on-dark);
  max-width: 620px;
}
.cta-band__sub {
  font-size: 15px;
  font-weight: 300;
  color: var(--body);
  margin-top: var(--sp-md);
}

/* ===================================================================
   BUTTONS
   =================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-xs);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  border-radius: var(--r-none);
  padding: var(--sp-md) var(--sp-xl);
  cursor: pointer;
  transition: all .2s;
  border: 1px solid;
  white-space: nowrap;
  line-height: 1;
}
.btn-primary {
  background: var(--canvas);
  color: var(--on-dark);
  border-color: var(--on-dark);
}
.btn-primary:hover {
  background: var(--on-dark);
  color: var(--canvas);
}
.btn-dl-all {
  background: var(--on-dark);
  color: var(--canvas);
  border-color: var(--on-dark);
  font-size: 14px;
  padding: var(--sp-md) var(--sp-xxl);
}
.btn-dl-all:hover {
  background: var(--body-strong);
  border-color: var(--body-strong);
}
.btn-danger {
  background: transparent;
  color: #e05555;
  border-color: #e05555;
  padding: 6px 12px;
  font-size: 11px;
}
.btn-danger:hover {
  background: #e05555;
  color: var(--on-dark);
}
.btn-sm {
  padding: var(--sp-xs) var(--sp-lg);
  font-size: 11px;
}

/* ===================================================================
   BOOK CARDS (4-up grid)
   =================================================================== */
.books-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-lg);
}

.book-card {
  background: var(--surface-soft);
  border: 1px solid var(--hairline);
  border-radius: var(--r-none);
  display: flex;
  flex-direction: column;
  transition: border-color .2s, transform .2s;
}
.book-card:hover {
  border-color: var(--hairline-strong);
  transform: translateY(-2px);
}

.book-card__cover {
  aspect-ratio: 3 / 4;
  background: var(--surface-card);
  overflow: hidden;
  position: relative;
}
.book-card__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.book-card__cover-ph {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-sm);
  background: linear-gradient(135deg, var(--surface-card), var(--surface-elevated));
  position: relative;
}
.book-card__cover-ph::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(to right, var(--lipia-blue), var(--lipia-green), var(--lipia-gold));
}
.book-card__cover-icon { font-size: 36px; opacity: .35; }
.book-card__cover-fmt {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--muted);
  text-transform: uppercase;
}

.book-card__body {
  padding: var(--sp-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--sp-xs);
}
.book-card__title {
  font-size: 15px;
  font-weight: 700;
  color: var(--on-dark);
  line-height: 1.45;
}
.book-card__author {
  font-size: 13px;
  font-weight: 300;
  color: var(--body);
  line-height: 1.4;
}
.book-card__meta {
  display: flex;
  gap: var(--sp-xs);
  flex-wrap: wrap;
  margin-top: auto;
  padding-top: var(--sp-sm);
}
.book-card__meta span {
  font-size: 12px;
  font-weight: 300;
  color: var(--muted);
}
.book-card__meta span + span::before {
  content: '·';
  margin-right: var(--sp-xs);
}
.book-card__actions {
  padding: 0 var(--sp-lg) var(--sp-lg);
}
.book-card__actions .btn { width: 100%; justify-content: center; }

/* ===================================================================
   EMPTY & LOADING STATES
   =================================================================== */
.state-empty,
.state-loading {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-md);
  padding: var(--sp-section) var(--sp-lg);
  text-align: center;
}
.state-empty {
  border: 1px dashed var(--hairline);
}
.state-empty__icon  { font-size: 48px; opacity: .25; }
.state-empty__title {
  font-size: 22px;
  font-weight: 700;
  color: var(--on-dark);
  text-transform: uppercase;
}
.state-empty__desc  {
  font-size: 14px;
  font-weight: 300;
  color: var(--muted);
  max-width: 380px;
  line-height: 1.65;
}

.state-loading {
  flex-direction: row;
  gap: var(--sp-xs);
}
.dot {
  width: 6px; height: 6px;
  border-radius: var(--r-full);
  background: var(--muted);
  animation: dotPulse 1.4s ease-in-out infinite both;
}
.dot:nth-child(2) { animation-delay: .16s; }
.dot:nth-child(3) { animation-delay: .32s; }
@keyframes dotPulse {
  0%, 80%, 100% { transform: scale(.6); opacity: .4; }
  40%           { transform: scale(1);  opacity: 1;  }
}

/* ===================================================================
   BREADCRUMB
   =================================================================== */
.breadcrumb {
  padding: var(--sp-md) 0;
  border-bottom: 1px solid var(--hairline);
}
.breadcrumb__inner {
  display: flex;
  align-items: center;
  gap: var(--sp-xs);
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--sp-lg);
}
.breadcrumb__item {
  font-size: 12px;
  font-weight: 400;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .5px;
}
.breadcrumb__item a { color: var(--muted); transition: color .2s; }
.breadcrumb__item a:hover { color: var(--on-dark); }
.breadcrumb__sep { color: var(--hairline); font-size: 12px; }
.breadcrumb__current { color: var(--on-dark); }

/* ===================================================================
   TOAST
   =================================================================== */
.toast {
  position: fixed;
  bottom: var(--sp-xl);
  right: var(--sp-xl);
  z-index: 9999;
  background: var(--on-dark);
  color: var(--canvas);
  padding: var(--sp-md) var(--sp-xl);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .5px;
  text-transform: uppercase;
  max-width: 360px;
  transform: translateY(80px);
  opacity: 0;
  transition: all .3s ease;
  border-radius: var(--r-none);
  pointer-events: none;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast--error {
  background: #100000;
  color: #ff7070;
  border: 1px solid #a00;
}

/* ===================================================================
   SCROLL TO TOP
   =================================================================== */
.scroll-top {
  position: fixed;
  bottom: var(--sp-xl);
  right: var(--sp-xl);
  width: 46px; height: 46px;
  border-radius: var(--r-full);
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  color: var(--on-dark);
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transform: translateY(16px);
  transition: all .3s;
  z-index: 100;
}
.scroll-top.visible { opacity: 1; transform: translateY(0); }
.scroll-top:hover   { background: var(--surface-elevated); border-color: var(--on-dark); }

/* ===================================================================
   FOOTER
   =================================================================== */
.site-footer {
  background: var(--surface-soft);
  border-top: 1px solid var(--hairline);
  padding: var(--sp-xxl) 0;
  margin-top: var(--sp-section);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--sp-xxl);
  align-items: start;
}
.footer-brand { display: flex; flex-direction: column; gap: var(--sp-md); }
.footer-brand img {
  height: 40px; width: auto;
  filter: brightness(0) invert(1);
  opacity: .65;
}
.footer-tagline {
  font-size: 13px;
  font-weight: 300;
  color: var(--muted);
  line-height: 1.7;
}
.footer-nav { display: flex; flex-direction: column; gap: var(--sp-sm); }
.footer-link {
  font-size: 12px;
  font-weight: 400;
  color: var(--muted);
  letter-spacing: .5px;
  text-transform: uppercase;
  transition: color .2s;
}
.footer-link:hover { color: var(--on-dark); }
.footer-copy { display: flex; flex-direction: column; align-items: flex-end; }
.footer-meta {
  font-size: 12px;
  font-weight: 300;
  color: var(--muted);
  line-height: 1.7;
  text-align: right;
}

/* ===================================================================
   ADMIN — LOGIN
   =================================================================== */
.admin-page {
  background: var(--canvas);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--sp-lg);
}
.admin-login-stripe { width: 440px; max-width: 100%; }
.admin-login-card {
  width: 440px;
  max-width: 100%;
  background: var(--surface-soft);
  border: 1px solid var(--hairline);
  padding: var(--sp-xxl);
}
.admin-login-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-md);
  margin-bottom: var(--sp-xxl);
  text-align: center;
}
.admin-login-top img {
  height: 52px;
  filter: brightness(0) invert(1);
}
.admin-login-title {
  font-size: 22px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--on-dark);
  letter-spacing: 2px;
}
.admin-login-sub {
  font-size: 12px;
  font-weight: 300;
  color: var(--muted);
  letter-spacing: .5px;
  text-transform: uppercase;
}

/* Form elements */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--sp-xs);
  margin-bottom: var(--sp-lg);
}
.form-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
}
.form-input {
  background: var(--canvas);
  border: 1px solid var(--hairline);
  color: var(--on-dark);
  font-family: var(--font);
  font-size: 15px;
  font-weight: 300;
  padding: var(--sp-md);
  outline: none;
  transition: border-color .2s;
  width: 100%;
  border-radius: var(--r-none);
}
.form-input:focus { border-color: var(--on-dark); }
.form-input::placeholder { color: var(--muted); font-weight: 300; }

.form-error {
  font-size: 12px;
  font-weight: 300;
  color: #ff7070;
  border-left: 2px solid #a00;
  padding-left: var(--sp-sm);
  margin-top: var(--sp-xs);
  display: none;
}
.form-error.show { display: block; }

/* ===================================================================
   ADMIN — DASHBOARD
   =================================================================== */
.admin-layout {
  display: grid;
  grid-template-columns: 270px 1fr;
  min-height: 100vh;
  background: var(--canvas);
}

/* Sidebar */
.admin-sidebar {
  background: var(--surface-soft);
  border-right: 1px solid var(--hairline);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}
.admin-sidebar__head {
  padding: var(--sp-xl);
  border-bottom: 1px solid var(--hairline);
  display: flex;
  align-items: center;
  gap: var(--sp-md);
}
.admin-sidebar__head img {
  height: 34px;
  filter: brightness(0) invert(1);
}
.admin-sidebar__head-text {}
.admin-sidebar__head-title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--on-dark);
  line-height: 1.2;
}
.admin-sidebar__head-sub {
  font-size: 10px;
  font-weight: 300;
  color: var(--muted);
  letter-spacing: .5px;
  text-transform: uppercase;
}

.admin-sidebar__section {
  padding: var(--sp-lg) var(--sp-xl) var(--sp-sm);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
}
.admin-nav-item {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  padding: var(--sp-sm) var(--sp-xl);
  font-size: 12px;
  font-weight: 400;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .5px;
  cursor: pointer;
  border-left: 2px solid transparent;
  transition: all .2s;
  background: none;
  border-top: none;
  border-right: none;
  border-bottom: none;
  font-family: var(--font);
  width: 100%;
  text-align: left;
}
.admin-nav-item:hover  { color: var(--on-dark); background: var(--surface-card); }
.admin-nav-item.active { color: var(--on-dark); background: var(--surface-card); border-left-color: var(--on-dark); }

.admin-sidebar__spacer { flex: 1; }
.admin-sidebar__foot {
  padding: var(--sp-xl);
  border-top: 1px solid var(--hairline);
}
.admin-email {
  font-size: 12px;
  font-weight: 300;
  color: var(--muted);
  margin-bottom: var(--sp-md);
  text-overflow: ellipsis;
  overflow: hidden;
}

/* Main area */
.admin-main {
  padding: var(--sp-xxl);
  overflow-y: auto;
  max-height: 100vh;
}
.admin-main__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--sp-xxl);
  padding-bottom: var(--sp-xl);
  border-bottom: 1px solid var(--hairline);
  gap: var(--sp-lg);
}
.admin-main__title {
  font-size: 32px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--on-dark);
  line-height: 1;
}
.admin-main__sub {
  font-size: 13px;
  font-weight: 300;
  color: var(--muted);
  margin-top: var(--sp-xs);
}

/* Semester tabs */
.sem-tabs {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--hairline);
  margin-bottom: var(--sp-xxl);
}
.sem-tab {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--muted);
  padding: var(--sp-sm) var(--sp-lg);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all .2s;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  font-family: var(--font);
}
.sem-tab:hover  { color: var(--on-dark); }
.sem-tab.active { color: var(--on-dark); border-bottom-color: var(--on-dark); }

/* Upload zone */
.upload-zone {
  border: 1px dashed var(--hairline);
  padding: var(--sp-xxl);
  text-align: center;
  cursor: pointer;
  transition: all .2s;
  margin-bottom: var(--sp-xxl);
  position: relative;
}
.upload-zone:hover,
.upload-zone.dragover { border-color: var(--on-dark); background: var(--surface-soft); }
.upload-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}
.upload-zone__icon { font-size: 36px; margin-bottom: var(--sp-md); opacity: .4; }
.upload-zone__title {
  font-size: 18px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--on-dark);
  margin-bottom: var(--sp-xs);
}
.upload-zone__desc {
  font-size: 13px;
  font-weight: 300;
  color: var(--muted);
  line-height: 1.65;
}

/* Upload form */
.upload-form {
  display: none;
  background: var(--surface-soft);
  border: 1px solid var(--hairline);
  padding: var(--sp-xl);
  margin-bottom: var(--sp-xxl);
}
.upload-form.show { display: block; }
.upload-form__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-xl);
  padding-bottom: var(--sp-md);
  border-bottom: 1px solid var(--hairline);
}
.upload-form__title {
  font-size: 16px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--on-dark);
}
.upload-form__file {
  font-size: 12px;
  font-weight: 300;
  color: var(--lipia-gold);
  margin-top: 2px;
}
.upload-form__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-lg);
}
.upload-form__grid .full { grid-column: 1 / -1; }
.upload-form__actions {
  display: flex;
  gap: var(--sp-md);
  margin-top: var(--sp-xl);
}

/* Progress bar */
.progress { display: none; margin-top: var(--sp-md); }
.progress.show { display: block; }
.progress__bar { width: 100%; height: 2px; background: var(--hairline); overflow: hidden; }
.progress__fill {
  height: 100%;
  background: linear-gradient(to right, var(--lipia-blue), var(--lipia-green), var(--lipia-gold));
  transition: width .3s;
  width: 0%;
}
.progress__text {
  font-size: 11px;
  font-weight: 300;
  color: var(--muted);
  margin-top: var(--sp-xs);
  text-align: center;
  letter-spacing: .5px;
  text-transform: uppercase;
}

/* Books table */
.books-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--sp-lg);
}
.books-table th {
  text-align: left;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
  padding: var(--sp-sm) var(--sp-md);
  border-bottom: 1px solid var(--hairline);
}
.books-table td {
  padding: var(--sp-md);
  border-bottom: 1px solid var(--hairline-strong);
  font-size: 13px;
  font-weight: 300;
  color: var(--body);
  vertical-align: middle;
}
.books-table tr:hover td { background: var(--surface-soft); }
.books-table .td-title { font-weight: 700; color: var(--on-dark); max-width: 260px; }
.books-table .td-actions {
  display: flex;
  gap: var(--sp-xs);
  justify-content: flex-end;
}
.table-empty {
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  padding: var(--sp-xl) !important;
  font-weight: 300;
  letter-spacing: .5px;
  text-transform: uppercase;
}

/* ===================================================================
   RESPONSIVE
   =================================================================== */
@media (max-width: 767px) {
  /* Nav mobile */
  .nav-links {
    position: fixed;
    top: calc(var(--nav-h) + 4px);
    left: 0; right: 0;
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    flex-direction: column;
    padding: var(--sp-lg);
    gap: var(--sp-md);
    align-items: flex-start;
    transform: translateY(-110%);
    opacity: 0;
    transition: all .3s;
    pointer-events: none;
    z-index: 999;
  }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: all; }
  .nav-burger     { display: flex; }

  /* Hero */
  .hero__title    { font-size: 44px; }
  .section__title { font-size: 32px; }
  .cta-band__title{ font-size: 28px; }

  /* Grids */
  .faculty-grid   { grid-template-columns: 1fr; }
  .semester-grid  { grid-template-columns: repeat(2, 1fr); }
  .books-grid     { grid-template-columns: 1fr; }
  .branch-split__grid { grid-template-columns: 1fr; }

  /* CTA band */
  .cta-band__inner { flex-direction: column; align-items: flex-start; }

  /* Footer */
  .footer-inner  { grid-template-columns: 1fr; gap: var(--sp-xl); }
  .footer-copy   { align-items: flex-start; }
  .footer-meta   { text-align: left; }

  /* Admin */
  .admin-layout  { grid-template-columns: 1fr; }
  .admin-sidebar { display: none; }
  .admin-main    { padding: var(--sp-lg); max-height: none; }
  .upload-form__grid { grid-template-columns: 1fr; }
  .upload-form__grid .full { grid-column: 1; }

  /* Toast & scroll-top */
  .scroll-top { bottom: var(--sp-lg); right: var(--sp-lg); }
  .toast      { bottom: var(--sp-lg); right: var(--sp-lg); left: var(--sp-lg); max-width: none; }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .hero__title    { font-size: 56px; }
  .faculty-grid   { grid-template-columns: repeat(2, 1fr); }
  .semester-grid  { grid-template-columns: repeat(2, 1fr); }
  .books-grid     { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) and (max-width: 1279px) {
  .faculty-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1280px) {
  .faculty-grid { grid-template-columns: repeat(4, 1fr); }
}