/* =====================================================================
   Jurnal Research Assistant - style.css
   Mobile-first, ringan, tanpa library & tanpa font eksternal.
   ===================================================================== */

:root {
  --bg: #f5f6fa;
  --card: #ffffff;
  --text: #14161f;
  --muted: #5c6172;
  --faint: #8b90a3;
  --border: #e4e6ef;
  --accent: #4f46e5;
  --accent-2: #7c3aed;
  --accent-soft: #eef0ff;
  --green: #16a34a;
  --green-soft: #e7f7ee;
  --yellow: #d97706;
  --yellow-soft: #fdf3e3;
  --red: #dc2626;
  --red-soft: #fdeaea;
  --header-bg: rgba(255, 255, 255, 0.82);
  --shadow: 0 1px 2px rgba(16, 18, 40, 0.05), 0 4px 16px rgba(16, 18, 40, 0.06);
  --radius: 16px;
  --radius-sm: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1117;
    --card: #171a23;
    --text: #e7e9f0;
    --muted: #9aa0b1;
    --faint: #6b7183;
    --border: #262b38;
    --accent: #818cf8;
    --accent-2: #a78bfa;
    --accent-soft: rgba(129, 140, 248, 0.12);
    --green: #4ade80;
    --green-soft: rgba(74, 222, 128, 0.12);
    --yellow: #fbbf24;
    --yellow-soft: rgba(251, 191, 36, 0.12);
    --red: #f87171;
    --red-soft: rgba(248, 113, 113, 0.12);
    --header-bg: rgba(15, 17, 23, 0.82);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 4px 16px rgba(0, 0, 0, 0.35);
  }
}

/* override manual (setting aplikasi, bukan preferensi OS) */
html[data-theme="dark"] {
  --bg: #0f1117;
  --card: #171a23;
  --text: #e7e9f0;
  --muted: #9aa0b1;
  --faint: #6b7183;
  --border: #262b38;
  --accent: #818cf8;
  --accent-2: #a78bfa;
  --accent-soft: rgba(129, 140, 248, 0.12);
  --green: #4ade80;
  --green-soft: rgba(74, 222, 128, 0.12);
  --yellow: #fbbf24;
  --yellow-soft: rgba(251, 191, 36, 0.12);
  --red: #f87171;
  --red-soft: rgba(248, 113, 113, 0.12);
  --header-bg: rgba(15, 17, 23, 0.82);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 4px 16px rgba(0, 0, 0, 0.35);
}
html[data-theme="light"] {
  --bg: #f5f6fa;
  --card: #ffffff;
  --text: #14161f;
  --muted: #5c6172;
  --faint: #8b90a3;
  --border: #e4e6ef;
  --accent: #4f46e5;
  --accent-2: #7c3aed;
  --accent-soft: #eef0ff;
  --green: #16a34a;
  --green-soft: #e7f7ee;
  --yellow: #d97706;
  --yellow-soft: #fdf3e3;
  --red: #dc2626;
  --red-soft: #fdeaea;
  --header-bg: rgba(255, 255, 255, 0.82);
  --shadow: 0 1px 2px rgba(16, 18, 40, 0.05), 0 4px 16px rgba(16, 18, 40, 0.06);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
  transition: background 0.2s ease, color 0.2s ease;
}

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

.container { max-width: 720px; margin: 0 auto; padding: 0 16px 64px; }

/* ---------------- Header ---------------- */
header {
  position: sticky; top: 0; z-index: 40;
  background: var(--header-bg);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-in {
  max-width: 720px; margin: 0 auto; padding: 10px 16px;
  display: flex; align-items: center; gap: 10px;
}
.brand { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 16px; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand svg { flex: none; }
.header-actions { margin-left: auto; display: flex; align-items: center; gap: 6px; }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 12px;
  background: var(--card); border: 1px solid var(--border);
  color: var(--muted); cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}
.icon-btn:hover { color: var(--accent); border-color: var(--accent); }
.icon-btn.danger:hover { color: var(--red); border-color: var(--red); }

/* ---------------- Hero / Homepage ---------------- */
.hero { padding: 40px 0 12px; text-align: center; }
.logo-mark {
  width: 56px; height: 56px; margin: 0 auto 14px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: var(--shadow);
}
.hero h1 { font-size: 26px; letter-spacing: -0.02em; }
.hero p { color: var(--muted); margin-top: 6px; font-size: 15px; }

/* ---------------- Search box ---------------- */
.search-box { margin: 24px 0 10px; }
.search-form { display: flex; gap: 8px; }
.search-input-wrap {
  flex: 1; position: relative; display: flex; align-items: center;
}
.search-input {
  width: 100%; padding: 13px 14px 13px 42px;
  font-size: 16px; border-radius: var(--radius);
  border: 1.5px solid var(--border);
  background: var(--card); color: var(--text);
  outline: none; transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.search-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.search-icon {
  position: absolute; left: 13px; color: var(--faint);
  pointer-events: none; display: flex;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: none; cursor: pointer; font-size: 15px; font-weight: 600;
  border-radius: var(--radius); color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  padding: 13px 20px; transition: opacity 0.15s ease, transform 0.1s ease;
}
.btn:hover { opacity: 0.92; }
.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-ghost {
  background: var(--card); color: var(--text);
  border: 1.5px solid var(--border); font-weight: 500;
}
.btn-block { width: 100%; }
.btn-sm { padding: 8px 14px; font-size: 14px; border-radius: 12px; }

/* ---------------- Suggestion chips ---------------- */
.suggestions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.chip {
  padding: 7px 14px; font-size: 13px; border-radius: 999px;
  background: var(--card); border: 1px solid var(--border);
  color: var(--muted); cursor: pointer; transition: all 0.15s ease;
}
.chip:hover { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }

/* ---------------- Sections ---------------- */
.section { margin-top: 28px; }
.section h2 {
  font-size: 14px; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--faint); margin-bottom: 12px; font-weight: 700;
}
.empty-hint { color: var(--faint); font-size: 14px; text-align: center; padding: 14px 0; }

/* ---------------- Result cards ---------------- */
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px;
  box-shadow: var(--shadow); margin-bottom: 12px;
}
.card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.card-title { font-size: 16px; font-weight: 650; line-height: 1.4; margin-bottom: 6px; }
.card-title a { color: var(--text); }
.card-title a:hover { color: var(--accent); text-decoration: none; }
.card-meta { font-size: 13px; color: var(--muted); margin-bottom: 8px; }
.card-meta .dot { color: var(--faint); margin: 0 5px; }
.card-journal { font-style: italic; }
.card-foot { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.relevance {
  font-size: 12px; font-weight: 700; color: var(--green);
  background: var(--green-soft); padding: 3px 10px; border-radius: 999px;
}
.relevance.low { color: var(--yellow); background: var(--yellow-soft); }
.oa-chip {
  font-size: 12px; font-weight: 600; color: var(--green);
  border: 1px solid var(--green); padding: 2px 9px; border-radius: 999px;
}
.oa-chip.closed { color: var(--muted); border-color: var(--border); }
.source-chip {
  font-size: 12px; color: var(--muted);
  background: var(--bg); border: 1px solid var(--border);
  padding: 2px 9px; border-radius: 999px;
}

/* ---------------- Filters ---------------- */
.filters {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  margin: 14px 0 16px;
}
.field { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); }
.field input[type="number"] {
  width: 86px; padding: 7px 9px; font-size: 14px;
  border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  background: var(--card); color: var(--text); outline: none;
}
.field input[type="number"]:focus { border-color: var(--accent); }
.check {
  display: inline-flex; align-items: center; gap: 7px; cursor: pointer;
  font-size: 13px; color: var(--muted); background: var(--card);
  border: 1.5px solid var(--border); padding: 7px 12px; border-radius: var(--radius-sm);
  user-select: none;
}
.check input { accent-color: var(--accent); width: 15px; height: 15px; }
.check.on { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

/* ---------------- Toolbar / result info ---------------- */
.toolbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 10px; margin-bottom: 12px; flex-wrap: wrap;
}
.result-count { font-size: 13px; color: var(--muted); }
.result-count b { color: var(--text); }

/* ---------------- Pagination ---------------- */
.pagination { display: flex; align-items: center; justify-content: center; gap: 12px; margin-top: 18px; }
.page-info { font-size: 13px; color: var(--muted); }

/* ---------------- States (loading / empty / error) ---------------- */
.state {
  text-align: center; padding: 40px 16px; color: var(--muted);
  border: 1.5px dashed var(--border); border-radius: var(--radius);
  margin-top: 6px;
}
.state .state-title { font-weight: 650; color: var(--text); font-size: 16px; margin-bottom: 6px; }
.state p { font-size: 14px; }
.spinner {
  width: 30px; height: 30px; margin: 0 auto 12px;
  border: 3px solid var(--border); border-top-color: var(--accent);
  border-radius: 50%; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.skeleton { text-align: left; }
.skeleton .card { pointer-events: none; }
.skeleton .sk {
  background: linear-gradient(90deg, var(--border) 25%, var(--bg) 50%, var(--border) 75%);
  background-size: 400% 100%; animation: shimmer 1.1s linear infinite;
  border-radius: 8px; height: 14px; margin-bottom: 10px;
}
@keyframes shimmer { 0% { background-position: 100% 0; } 100% { background-position: -100% 0; } }

/* ---------------- Detail page ---------------- */
.detail-title { font-size: 21px; font-weight: 700; letter-spacing: -0.015em; line-height: 1.35; margin-bottom: 10px; }
.detail-meta { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 14px; color: var(--muted); margin-bottom: 8px; }
.detail-meta b { color: var(--text); font-weight: 600; }

.verif-badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 650; padding: 8px 14px; border-radius: 999px;
  margin: 12px 0;
}
.verif-badge .vdot { width: 9px; height: 9px; border-radius: 50%; background: currentColor; }
.verif-badge.green { color: var(--green); background: var(--green-soft); }
.verif-badge.yellow { color: var(--yellow); background: var(--yellow-soft); }
.verif-badge.red { color: var(--red); background: var(--red-soft); }

.verif-checks { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.vcheck {
  font-size: 12px; border-radius: 999px; padding: 3px 10px; font-weight: 600;
}
.vcheck.yes { color: var(--green); background: var(--green-soft); }
.vcheck.no { color: var(--muted); background: var(--bg); border: 1px solid var(--border); }

.section-block { margin-top: 22px; }
.section-block h3 {
  font-size: 13px; text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--faint); margin-bottom: 8px; font-weight: 700;
}
.abstract {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 14px 16px; font-size: 14.5px;
  color: var(--text); white-space: pre-line;
}

.link-out { display: block; margin-top: 8px; word-break: break-all; font-size: 13.5px; }

/* ---------------- AI Summary ---------------- */
.summary-shell { margin-top: 26px; }
.summary-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.summary-head h3 { font-size: 16px; font-weight: 700; display: flex; align-items: center; gap: 8px; color: var(--text); }
.summary-head .spark { color: var(--accent-2); }
.summary-note { font-size: 12px; color: var(--faint); }

.summary-block {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 13px 15px; margin-bottom: 10px;
}
.summary-block .sb-label {
  display: block; font-size: 12px; font-weight: 700; color: var(--accent);
  text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 4px;
}
.summary-block p { font-size: 14.5px; }

/* ---------------- Citation ---------------- */
.citation {
  background: var(--card); border: 1px dashed var(--border);
  border-radius: var(--radius-sm); padding: 13px 15px; font-size: 13.5px;
  color: var(--muted); font-family: ui-monospace, "Cascadia Code", Menlo, monospace;
  word-break: break-word; margin-bottom: 10px;
}
.citation-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 6px; }

/* ---------------- Data-saver banner ---------------- */
.save-banner {
  display: none; align-items: center; gap: 8px;
  font-size: 12.5px; color: var(--yellow);
  background: var(--yellow-soft);
  border: 1px solid rgba(217, 119, 6, 0.25);
  border-radius: 12px; padding: 8px 12px; margin-bottom: 12px;
}
.save-banner.visible { display: flex; }

/* ---------------- Bottom sheet (settings) ---------------- */
.sheet-overlay {
  position: fixed; inset: 0; background: rgba(0, 0, 0, 0.45);
  z-index: 90; opacity: 0; pointer-events: none; transition: opacity 0.2s ease;
}
.sheet-overlay.open { opacity: 1; pointer-events: auto; }
.sheet {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 100;
  background: var(--card); border-radius: 20px 20px 0 0;
  padding: 10px 18px calc(18px + env(safe-area-inset-bottom));
  transform: translateY(100%); transition: transform 0.25s ease;
  box-shadow: 0 -8px 30px rgba(0, 0, 0, 0.2);
}
.sheet.open { transform: translateY(0); }
.sheet-grab { width: 40px; height: 4px; border-radius: 999px; background: var(--border); margin: 4px auto 12px; }
.sheet h3 { font-size: 16px; margin-bottom: 14px; }
.setting-row {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 2px; border-top: 1px solid var(--border);
  font-size: 14.5px;
}
.setting-row:first-of-type { border-top: none; }
.setting-row small { display: block; color: var(--faint); font-size: 12px; }

/* toggle */
.toggle { position: relative; width: 46px; height: 26px; flex: none; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle .slider {
  position: absolute; inset: 0; border-radius: 999px;
  background: var(--border); transition: background 0.2s ease; cursor: pointer;
}
.toggle .slider::before {
  content: ""; position: absolute; width: 20px; height: 20px;
  left: 3px; top: 3px; border-radius: 50%; background: #fff;
  transition: transform 0.2s ease;
}
.toggle input:checked + .slider { background: var(--accent); }
.toggle input:checked + .slider::before { transform: translateX(20px); }

.seg { display: flex; background: var(--bg); border: 1px solid var(--border); border-radius: 12px; padding: 3px; gap: 3px; }
.seg button {
  border: none; background: transparent; color: var(--muted);
  padding: 7px 14px; font-size: 13.5px; border-radius: 9px; cursor: pointer; font-weight: 600;
}
.seg button.on { background: var(--card); color: var(--accent); box-shadow: var(--shadow); }

/* ---------------- Toast ---------------- */
.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%) translateY(20px);
  background: var(--text); color: var(--bg);
  font-size: 14px; padding: 11px 18px; border-radius: 14px;
  opacity: 0; pointer-events: none; transition: all 0.25s ease;
  z-index: 200; max-width: calc(100vw - 40px); text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------------- Footer ---------------- */
footer {
  text-align: center; color: var(--faint); font-size: 12.5px;
  padding: 28px 16px 10px;
}
footer hr { border: none; border-top: 1px solid var(--border); margin-bottom: 14px; }
.footer-brand { margin-top: 5px; font-size: 11.5px; opacity: 0.85; }

/* ---------------- Misc ---------------- */
.subtle { color: var(--faint); }
.mt12 { margin-top: 12px; }
.flex { display: flex; align-items: center; gap: 8px; }
.flex-wrap { flex-wrap: wrap; }
.tag {
  display: inline-block; font-size: 12px; font-weight: 600;
  background: var(--accent-soft); color: var(--accent);
  border-radius: 999px; padding: 2px 10px; margin-right: 6px;
}

@media (min-width: 640px) {
  .hero h1 { font-size: 32px; }
  .detail-title { font-size: 24px; }
}
@media (max-width: 420px) {
  .btn { padding: 13px 15px; }
}