/* ═══════════════════════════════════════════════════════════
  Unhas Read Only — Main Stylesheet
   ═══════════════════════════════════════════════════════════ */

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

:root {
  --blue-dark:    #1b3a6b;
  --blue-mid:     #2a52a0;
  --blue-light:   #e8eef8;
  --red:          #c53030;
  --green:        #276749;
  --gray-50:      #f7f8fa;
  --gray-100:     #edf0f5;
  --gray-200:     #dee3ec;
  --gray-400:     #9aa3b2;
  --gray-600:     #4a5568;
  --gray-800:     #1a202c;
  --white:        #ffffff;
  --shadow-sm:    0 1px 4px rgba(0,0,0,.08);
  --shadow-md:    0 4px 16px rgba(0,0,0,.10);
  --shadow-lg:    0 8px 32px rgba(0,0,0,.14);
  --radius:       10px;
  --font:         -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  background: var(--gray-50);
  color: var(--gray-800);
  min-height: 100vh;
  line-height: 1.6;
}

a { color: var(--blue-mid); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── SIDORA Logo Styling ── */
.hero-logo-img {
  height: 120px;
  width: auto;
  margin-bottom: 20px;
  object-fit: contain;
}

.header-logo-img {
  height: 40px;
  width: auto;
  margin-right: 12px;
  object-fit: contain;
}

.logo-text {
  font-weight: 600;
  font-size: 1.2rem;
  letter-spacing: 0.5px;
}

.logo-text strong {
  font-weight: 700;
  margin-left: 4px;
}

/* ── Site Header ──────────────────────────────────────────── */
.site-header {
  background: var(--blue-dark);
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 62px;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: .5rem;
  color: var(--white);
  font-size: 1.25rem;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}
.site-logo:hover { text-decoration: none; opacity: .9; }
.site-logo strong { font-weight: 800; }
.logo-icon { font-size: 1.4rem; }

/* ── Search Input ─────────────────────────────────────────── */
.search-input-wrap {
  display: flex;
  align-items: stretch;
  border-radius: 50px;
  overflow: hidden;
  border: 2px solid transparent;
  transition: border-color .2s, box-shadow .2s;
}
.search-input-wrap:focus-within {
  border-color: var(--blue-mid);
  box-shadow: 0 0 0 3px rgba(42,82,160,.18);
}
.search-input-wrap.compact {
  flex: 1;
  max-width: 560px;
  background: var(--white);
}
.search-input-wrap.hero {
  background: var(--white);
  box-shadow: var(--shadow-lg);
}

.search-input {
  flex: 1;
  border: none;
  outline: none;
  padding: .65rem 1.2rem;
  font-size: 1rem;
  font-family: var(--font);
  background: transparent;
  color: var(--gray-800);
}
.search-input-wrap.hero .search-input { font-size: 1.1rem; padding: .85rem 1.4rem; }

.year-select {
  border: none;
  border-right: 1px solid var(--gray-200);
  outline: none;
  background: var(--white);
  color: var(--gray-600);
  font-size: .9rem;
  font-family: var(--font);
  padding: 0 .8rem;
  cursor: pointer;
}
.search-input-wrap.hero .year-select {
  font-size: .95rem;
  padding: 0 1rem;
}

.search-btn {
  background: var(--blue-dark);
  border: none;
  cursor: pointer;
  padding: 0 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .15s;
}
.search-btn:hover { background: var(--blue-mid); }
.search-btn svg { width: 20px; height: 20px; stroke: var(--white); }

/* ── Hero Section ─────────────────────────────────────────── */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(160deg, var(--blue-dark) 0%, #0f2342 50%, #1b3a6b 100%);
  padding: 2rem;
}

.hero-inner {
  text-align: center;
  width: 100%;
  max-width: 620px;
}

.hero-brand {
  margin-bottom: 2.5rem;
}
.hero-icon { font-size: 3rem; display: block; margin-bottom: .5rem; }

.hero-title {
  font-size: 2.6rem;
  font-weight: 500;
  color: var(--white);
  letter-spacing: -.5px;
}
.hero-title strong { font-weight: 900; }

.hero-subtitle {
  color: rgba(255,255,255,.7);
  font-size: 1.05rem;
  margin-top: .4rem;
}

.hero-form { margin-bottom: 1.2rem; }

.search-error {
  color: #fed7d7;
  margin-top: .7rem;
  font-size: .92rem;
}

.hero-hint {
  color: rgba(255,255,255,.55);
  font-size: .9rem;
}
.hero-hint a {
  color: rgba(255,255,255,.8);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.hero-hint a:hover { color: var(--white); }

/* ── Header Search Form ───────────────────────────────────── */
.header-search-form { flex: 1; }

/* ── Results Page ─────────────────────────────────────────── */
.results-main {
  padding: 2rem 1.5rem 4rem;
}

.results-container {
  max-width: 860px;
  margin: 0 auto;
}

.results-meta {
  font-size: .92rem;
  color: var(--gray-600);
  margin-bottom: 1.25rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--gray-200);
}

/* ── Result List ──────────────────────────────────────────── */
.results-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: .6rem;
}

.result-item {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.1rem 1.4rem;
  transition: box-shadow .15s, border-color .15s, transform .1s;
  counter-increment: result-counter;
}
.result-item:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--blue-mid);
  transform: translateY(-1px);
}

.result-link { display: block; }
.result-link:hover { text-decoration: none; }

.result-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--blue-dark);
  line-height: 1.45;
  margin-bottom: .45rem;
  transition: color .15s;
}
.result-item:hover .result-title { color: var(--blue-mid); }

.result-abstract {
  margin: 0 0 .6rem;
  color: var(--gray-700);
  line-height: 1.55;
  font-size: .92rem;
}

.result-abstract-empty {
  font-style: italic;
  color: var(--gray-500);
}

.result-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem .9rem;
  font-size: .82rem;
  color: var(--gray-600);
}

.meta-author { font-style: italic; }
.meta-year {
  background: var(--blue-light);
  color: var(--blue-dark);
  border-radius: 4px;
  padding: .1rem .4rem;
  font-size: .8rem;
  font-style: normal;
  font-weight: 600;
}
.meta-type {
  background: var(--gray-100);
  border-radius: 4px;
  padding: .1rem .4rem;
  font-size: .8rem;
}

.meta-pdf {
  border-radius: 999px;
  padding: .12rem .55rem;
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .01em;
}
.pdf-available {
  background: #e6fffa;
  color: #216749;
}
.pdf-restricted {
  background: #fff5f5;
  color: #c53030;
}
.pdf-unavailable {
  background: #f7fafc;
  color: #4a5568;
}
.pdf-unknown {
  background: #fffbea;
  color: #744210;
}

/* ── Pagination ───────────────────────────────────────────── */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: .4rem;
  margin-top: 2.5rem;
}

.page-numbers {
  display: flex;
  align-items: center;
  gap: .3rem;
}

.page-btn {
  display: inline-flex;
  align-items: center;
  padding: .45rem .85rem;
  border-radius: 8px;
  border: 1px solid var(--gray-200);
  background: var(--white);
  color: var(--gray-600);
  font-size: .88rem;
  font-weight: 500;
  transition: all .15s;
  cursor: pointer;
  text-decoration: none;
}
.page-btn:hover:not(.disabled):not(.active) {
  background: var(--blue-light);
  border-color: var(--blue-mid);
  color: var(--blue-dark);
  text-decoration: none;
}
.page-btn.active {
  background: var(--blue-dark);
  border-color: var(--blue-dark);
  color: var(--white);
  cursor: default;
}
.page-btn.disabled {
  opacity: .35;
  cursor: not-allowed;
}
.page-ellipsis {
  padding: .45rem .4rem;
  color: var(--gray-400);
  font-size: .9rem;
}

/* ── Detail Page ──────────────────────────────────────────── */
.detail-main {
  padding: 2rem 1.5rem 4rem;
}

.detail-container {
  max-width: 820px;
  margin: 0 auto;
}

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  color: var(--blue-mid);
  font-size: .9rem;
  margin-bottom: 1.5rem;
  padding: .3rem 0;
  text-decoration: none;
}
.btn-back:hover { color: var(--blue-dark); text-decoration: underline; }

.eprint-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.8rem 2rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.eprint-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--blue-dark);
  line-height: 1.4;
  margin-bottom: 1rem;
}

.eprint-meta { margin-bottom: 1rem; }
.meta-row {
  display: flex;
  gap: .8rem;
  font-size: .9rem;
  color: var(--gray-600);
  margin-bottom: .3rem;
}
.meta-label {
  font-weight: 600;
  min-width: 70px;
  color: var(--gray-800);
}

.eprint-abstract h3 {
  font-size: .95rem;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: .5rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  font-size: .82rem;
}
.eprint-abstract p {
  font-size: .92rem;
  color: var(--gray-600);
  line-height: 1.65;
}

/* ── Docs Grid ────────────────────────────────────────────── */
.docs-section { margin-top: .5rem; }

.docs-heading {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-800);
  text-transform: uppercase;
  letter-spacing: .05em;
  font-size: .82rem;
  margin-bottom: 1rem;
}

.docs-grid {
  display: flex;
  flex-direction: column;
  gap: .7rem;
}

.doc-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  cursor: pointer;
  transition: all .15s;
  box-shadow: var(--shadow-sm);
  user-select: none;
}
.doc-card:hover:not(.doc-restricted) {
  border-color: var(--blue-mid);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.doc-card.doc-restricted {
  opacity: .7;
  cursor: default;
  background: var(--gray-50);
}
.doc-card:focus {
  outline: 2px solid var(--blue-mid);
  outline-offset: 2px;
}

.doc-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--blue-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.doc-card.doc-restricted .doc-icon {
  background: var(--gray-100);
}
.doc-icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--blue-dark);
}
.doc-card.doc-restricted .doc-icon svg { stroke: var(--gray-400); }

.doc-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: .2rem;
}
.doc-label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-800);
}
.doc-status {
  font-size: .8rem;
  font-weight: 500;
}
.doc-status.available { color: var(--green); }
.doc-status.restricted { color: var(--red); }

.doc-arrow svg {
  width: 18px;
  height: 18px;
  stroke: var(--gray-400);
}
.doc-card:hover:not(.doc-restricted) .doc-arrow svg { stroke: var(--blue-mid); }

/* ── Modal ────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s;
}
.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal-box {
  background: var(--white);
  border-radius: 16px;
  padding: 2.5rem 2rem;
  max-width: 400px;
  width: 100%;
  text-align: center;
  box-shadow: var(--shadow-lg);
  transform: translateY(8px);
  transition: transform .2s;
}
.modal-overlay.active .modal-box { transform: translateY(0); }

.modal-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.modal-title { font-size: 1.15rem; font-weight: 700; color: var(--gray-800); margin-bottom: .7rem; }
.modal-message { font-size: .95rem; color: var(--gray-600); line-height: 1.6; margin-bottom: 1.5rem; }

.modal-close-btn {
  background: var(--blue-dark);
  color: var(--white);
  border: none;
  border-radius: 8px;
  padding: .65rem 2rem;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s;
}
.modal-close-btn:hover { background: var(--blue-mid); }
.modal-close-btn:focus { outline: 2px solid var(--blue-mid); outline-offset: 2px; }

/* ── Empty State ──────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--gray-600);
}
.empty-icon { font-size: 3rem; margin-bottom: 1rem; }
.empty-state h3 { font-size: 1.15rem; color: var(--gray-800); margin-bottom: .5rem; }
.empty-state p { font-size: .95rem; margin-bottom: 1.5rem; }
.empty-state .btn-back {
  display: inline-block;
  background: var(--blue-dark);
  color: var(--white);
  border-radius: 8px;
  padding: .6rem 1.5rem;
  font-size: .95rem;
  text-decoration: none;
  transition: background .15s;
}
.empty-state .btn-back:hover { background: var(--blue-mid); }

/* ── Alert ────────────────────────────────────────────────── */
.alert {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .9rem 1.2rem;
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
  font-size: .93rem;
}
.alert svg { width: 20px; height: 20px; flex-shrink: 0; }
.alert-error {
  background: #fff5f5;
  border: 1px solid #fed7d7;
  color: #c53030;
}

/* ═══════════════════════════════════════════════════════════
   VIEWER PAGE
   ═══════════════════════════════════════════════════════════ */
.viewer-body {
  background: #111827;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* ── Viewer Topbar ────────────────────────────────────────── */
.viewer-topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: #1f2937;
  border-bottom: 1px solid #374151;
  padding: 0 1.25rem;
  height: 52px;
  flex-shrink: 0;
  z-index: 10;
}

.viewer-back {
  color: #9ca3af;
  font-size: .88rem;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  padding: .4rem .6rem;
  border-radius: 6px;
  transition: color .15s, background .15s;
}
.viewer-back:hover { color: var(--white); background: rgba(255,255,255,.07); text-decoration: none; }

.viewer-title-wrap {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: .1rem;
}
.viewer-doc-title {
  font-size: .9rem;
  font-weight: 600;
  color: #e5e7eb;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.viewer-doc-type {
  font-size: .75rem;
  color: #6b7280;
}

.viewer-page-info {
  font-size: .82rem;
  color: #9ca3af;
  white-space: nowrap;
  flex-shrink: 0;
}

/* ── Viewer Canvas ────────────────────────────────────────── */
.viewer-canvas {
  flex: 1;
  overflow-y: auto;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 1.5rem 1rem;
  background: #111827;
  position: relative;
}

.viewer-loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: #9ca3af;
}
.viewer-loading p { margin-top: .75rem; font-size: .9rem; }

.spinner {
  width: 44px;
  height: 44px;
  border: 4px solid #374151;
  border-top-color: #60a5fa;
  border-radius: 50%;
  animation: spin .8s linear infinite;
  margin: 0 auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

.viewer-error-msg {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: #f87171;
  display: flex;
  flex-direction: column;
  gap: .75rem;
  align-items: center;
}
.viewer-error-msg button {
  background: #374151;
  color: #e5e7eb;
  border: none;
  border-radius: 6px;
  padding: .4rem .9rem;
  cursor: pointer;
  font-size: .88rem;
}
.viewer-error-msg button:hover { background: #4b5563; }

.pdf-page-img {
  max-width: min(100%, 900px);
  width: 100%;
  border-radius: 4px;
  box-shadow: 0 4px 32px rgba(0,0,0,.5);
  display: block;
  /* Prevent right-click save-as visual clue */
  -webkit-user-select: none;
  user-select: none;
  pointer-events: none;
}

/* ── Viewer Navbar ────────────────────────────────────────── */
.viewer-navbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  background: #1f2937;
  border-top: 1px solid #374151;
  padding: .6rem 1.5rem;
  flex-shrink: 0;
}

.nav-btn {
  background: #374151;
  color: #d1d5db;
  border: none;
  border-radius: 8px;
  padding: .45rem .9rem;
  font-size: .95rem;
  cursor: pointer;
  transition: background .15s, color .15s;
  font-family: var(--font);
}
.nav-btn:hover:not(:disabled) { background: #4b5563; color: var(--white); }
.nav-btn:disabled { opacity: .35; cursor: not-allowed; }

.nav-page-input {
  display: flex;
  align-items: center;
  gap: .5rem;
  background: #111827;
  border: 1px solid #374151;
  border-radius: 8px;
  padding: .35rem .75rem;
}
.nav-page-input input {
  width: 52px;
  background: transparent;
  border: none;
  outline: none;
  color: #e5e7eb;
  font-size: .9rem;
  text-align: center;
  font-family: var(--font);
  -moz-appearance: textfield;
}
.nav-page-input input::-webkit-outer-spin-button,
.nav-page-input input::-webkit-inner-spin-button { -webkit-appearance: none; }
.nav-page-sep { color: #6b7280; font-size: .9rem; white-space: nowrap; }
#totalPageDisplay { color: #9ca3af; }

/* ── Viewer Center State (restricted / error) ─────────────── */
.viewer-center-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 3rem;
  color: #9ca3af;
}
.state-icon { font-size: 3rem; margin-bottom: 1rem; }
.viewer-center-state h3 { font-size: 1.2rem; color: #e5e7eb; margin-bottom: .6rem; }
.viewer-center-state p { font-size: .95rem; max-width: 380px; line-height: 1.6; }

.btn-back-white {
  display: inline-block;
  margin-top: 1.5rem;
  color: #60a5fa;
  font-size: .9rem;
  text-decoration: none;
}
.btn-back-white:hover { color: #93c5fd; text-decoration: underline; }

/* ── Watermark Notice ─────────────────────────────────────── */
.watermark-notice {
  text-align: center;
  font-size: .72rem;
  color: #4b5563;
  padding: .35rem;
  background: #111827;
  flex-shrink: 0;
}

/* ── Print Protection (viewer) ───────────────────────────── */
@media print {
  .viewer-body * {
    display: none !important;
  }

  .viewer-body {
    background: #fff !important;
  }

  .viewer-body::before {
    content: "Print dinonaktifkan untuk dokumen ini.";
    display: block !important;
    color: #000;
    font-size: 14pt;
    padding: 2cm;
  }
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 640px) {
  .header-inner { gap: .75rem; }
  .hero-title { font-size: 2rem; }
  .result-item { padding: .85rem 1rem; }
  .eprint-card { padding: 1.2rem 1.2rem; }
  .eprint-title { font-size: 1.1rem; }
  .pagination { gap: .25rem; }
  .page-btn { padding: .4rem .65rem; font-size: .82rem; }
  .viewer-topbar { padding: 0 .75rem; }
  .viewer-doc-title { font-size: .82rem; }
  .nav-btn { padding: .4rem .65rem; font-size: .88rem; }
}