:root {
  --bg: #f5f6fa;
  --surface: #ffffff;
  --surface2: #f0f2f8;
  --border: #e0e4ef;
  --text: #1a1d2e;
  --text-muted: #6b7280;
  --primary: #4361ee;
  --primary-dark: #3451d1;
  --radius: 12px;
  --shadow: 0 2px 16px rgba(0,0,0,0.07);
}

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

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg) url('/static/bg.jpg.png') center center / cover fixed;
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
body::before {
  content: '';
  position: fixed; inset: 0; z-index: -1;
  background: rgba(245, 246, 250, 0.82);
}

/* ─── Header ─── */
header {
  background: linear-gradient(135deg, #4361ee 0%, #3a0ca3 100%);
  color: white;
  padding: 20px 32px;
}
.header-inner {
  display: flex; align-items: center; max-width: 1100px; margin: 0 auto;
}
.header-logo-link {
  display: flex; align-items: center; gap: 18px;
  text-decoration: none; color: white;
}
.header-logo-link:hover { opacity: 0.9; }
.header-logo { font-size: 2.2rem; }
header h1 { font-size: 1.5rem; font-weight: 700; }
.subtitle { font-size: 0.82rem; opacity: 0.82; margin-top: 3px; }

/* ─── Navigation ─── */
.main-nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 6px rgba(0,0,0,0.05);
  position: sticky; top: 0; z-index: 100;
}
.nav-inner {
  max-width: 1100px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; gap: 4px; height: 46px;
}
.nav-link {
  padding: 6px 14px; border-radius: 6px;
  font-size: 0.88rem; font-weight: 500;
  color: var(--text-muted); text-decoration: none;
  border: none; background: none; cursor: pointer;
  transition: all .15s; white-space: nowrap;
}
.nav-link:hover, .nav-link.active {
  background: var(--surface2); color: var(--primary);
}
.nav-arrow { font-size: 0.7rem; opacity: 0.7; }

/* Dropdown */
.nav-dropdown { position: relative; }
.dropdown-menu {
  display: none;
  position: absolute; top: calc(100% + 6px); left: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 6px 28px rgba(0,0,0,0.13);
  padding: 6px; min-width: 210px; z-index: 200;
}
.nav-dropdown:hover .dropdown-menu,
.nav-dropdown:focus-within .dropdown-menu { display: block; }
.dropdown-item {
  display: block; padding: 8px 12px; border-radius: 7px;
  font-size: 0.87rem; color: var(--text);
  text-decoration: none; transition: all .1s;
}
.dropdown-item:hover { background: var(--surface2); color: var(--primary); }
.dropdown-hub { font-weight: 600; color: var(--primary); }
.dropdown-divider { height: 1px; background: var(--border); margin: 4px 0; }

/* ─── Main ─── */
main { flex: 1; max-width: 1100px; width: 100%; margin: 0 auto; padding: 28px 24px; }

/* ─── Input section (home page) ─── */
.input-section {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px; margin-bottom: 28px;
}
.input-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.input-header label { font-weight: 600; font-size: 1rem; }
.word-count { font-size: 0.82rem; color: var(--text-muted); background: var(--surface2); padding: 3px 10px; border-radius: 20px; }

textarea {
  width: 100%;
  border: 1.5px solid var(--border);
  border-radius: 8px; padding: 14px;
  font-size: 0.97rem; font-family: inherit;
  resize: vertical; outline: none;
  transition: border-color .2s;
  background: var(--bg); color: var(--text); line-height: 1.65;
}
textarea:focus { border-color: var(--primary); }

.corpus-selector {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  margin-top: 12px; padding: 10px 14px;
  background: var(--surface2); border: 1px solid var(--border); border-radius: 8px;
  font-size: 0.85rem;
}
.corpus-label { font-weight: 600; color: var(--text-muted); white-space: nowrap; }
.corpus-radio { display: flex; align-items: center; gap: 5px; cursor: pointer; color: var(--text); }
.corpus-radio input { accent-color: var(--primary); cursor: pointer; }

.corpus-badge-wrap { text-align: right; margin: 8px 0 -4px; }
.corpus-badge {
  display: inline-block; font-size: 0.75rem; padding: 2px 10px;
  background: #eef0fb; border: 1px solid #c5ccf7; color: var(--primary-dark);
  border-radius: 20px; font-weight: 500;
}

.input-footer { display: flex; justify-content: space-between; align-items: center; margin-top: 12px; gap: 10px; flex-wrap: wrap; }
.sample-btns { display: flex; gap: 8px; flex-wrap: wrap; }

.btn-sample, .btn-clear {
  padding: 7px 14px; border-radius: 20px;
  border: 1.5px solid var(--border); background: white;
  font-size: 0.82rem; cursor: pointer; transition: all .15s; color: var(--text-muted);
}
.btn-sample:hover { border-color: var(--primary); color: var(--primary); }
.btn-clear:hover { border-color: #e74c3c; color: #e74c3c; }

.btn-analyze {
  padding: 11px 30px;
  background: var(--primary); color: white; border: none;
  border-radius: 25px; font-size: 1rem; font-weight: 600;
  cursor: pointer; transition: background .2s, transform .1s;
  display: flex; align-items: center; gap: 8px;
}
.btn-analyze:hover { background: var(--primary-dark); }
.btn-analyze:active { transform: scale(0.97); }
.btn-analyze:disabled { opacity: .65; cursor: not-allowed; }

.spinner {
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.35);
  border-top-color: white; border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.hidden { display: none !important; }

/* ─── CEFR Banner ─── */
.cefr-banner {
  border-radius: var(--radius); padding: 28px 32px; margin-bottom: 24px;
  text-align: center; color: white; box-shadow: var(--shadow); transition: background .4s;
}
.cefr-label { font-size: 0.85rem; opacity: 0.85; text-transform: uppercase; letter-spacing: .08em; }
.cefr-level { font-size: 3.2rem; font-weight: 800; line-height: 1.1; margin: 6px 0; }
.cefr-desc { font-size: 0.95rem; opacity: 0.9; margin-bottom: 18px; }
.cefr-scale { display: flex; justify-content: center; gap: 6px; flex-wrap: wrap; }
.cs {
  padding: 4px 14px; border-radius: 20px; font-size: 0.82rem; font-weight: 700;
  opacity: 0.45; border: 2px solid rgba(255,255,255,0.4); transition: opacity .3s;
}
.cs.active { opacity: 1; border-color: white; background: rgba(255,255,255,0.2); }

/* ─── Stats Row ─── */
.stats-row { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 28px; }
.stat-card {
  flex: 1; min-width: 130px;
  background: var(--surface); border-radius: var(--radius);
  padding: 16px 20px; box-shadow: var(--shadow); text-align: center;
}
.stat-value { font-size: 1.8rem; font-weight: 700; color: var(--primary); }
.stat-label { font-size: 0.78rem; color: var(--text-muted); margin-top: 4px; }

/* ─── Section titles ─── */
.section-title {
  font-size: 1.05rem; font-weight: 700; color: var(--text);
  margin-bottom: 14px; padding-left: 12px;
  border-left: 4px solid var(--primary);
}

/* ─── Formula cards ─── */
.formula-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin-bottom: 32px; }
.formula-card {
  background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 22px; display: flex; flex-direction: column; gap: 10px;
  border-top: 4px solid var(--primary); transition: transform .15s;
}
.formula-card:hover { transform: translateY(-2px); }
.formula-name { font-size: 0.9rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em; }
.formula-score { font-size: 2.6rem; font-weight: 800; color: var(--text); }
.formula-score.small-score { font-size: 1.5rem; font-family: 'Courier New', monospace; }
.formula-level { font-size: 0.95rem; font-weight: 600; padding: 5px 12px; border-radius: 20px; display: inline-block; width: fit-content; color: white; }
.formula-info { font-size: 0.78rem; color: var(--text-muted); line-height: 1.55; border-top: 1px solid var(--border); padding-top: 10px; }
.formula-gauge-wrap { position: relative; margin: 2px 0 4px; }
.formula-gauge { height: 8px; border-radius: 4px; background: var(--border); overflow: hidden; }
.gauge-fill { height: 100%; border-radius: 4px; background: linear-gradient(90deg, #27ae60, #f39c12, #e74c3c); transition: width .6s cubic-bezier(.4,0,.2,1); }
.gauge-label { font-size: 0.7rem; color: var(--text-muted); position: absolute; bottom: -16px; }
.gauge-label.right { right: 0; }
.sonmez-detail { font-size: 0.8rem; color: var(--text-muted); line-height: 1.6; }

/* ─── Frequency analysis ─── */
.freq-section {
  background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 24px; margin-bottom: 28px; display: flex; gap: 32px; flex-wrap: wrap;
}
.freq-chart-wrap { flex: 1; min-width: 220px; display: flex; flex-direction: column; gap: 18px; }
.freq-bar-group { display: flex; align-items: center; gap: 10px; }
.freq-bar-label { width: 90px; font-size: 0.82rem; color: var(--text-muted); flex-shrink: 0; }
.freq-bar-outer { flex: 1; height: 14px; background: var(--border); border-radius: 7px; overflow: hidden; }
.freq-bar-inner { height: 100%; border-radius: 7px; transition: width .7s cubic-bezier(.4,0,.2,1); width: 0%; }
.freq-bar-pct { width: 42px; font-size: 0.85rem; font-weight: 600; text-align: right; }
.f1 { background: #27ae60; } .f3 { background: #3498db; } .f5 { background: #9b59b6; } .fnone-bar { background: #e74c3c; }
.freq-legend { display: flex; flex-direction: column; gap: 10px; justify-content: center; font-size: 0.82rem; color: var(--text-muted); }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 5px; }
.dot.f1 { background: #27ae60; } .dot.f3 { background: #3498db; } .dot.f5 { background: #9b59b6; } .dot.fnone { background: #e74c3c; }

/* ─── Syllable distribution (home) ─── */
.syl-section {
  background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 24px; margin-bottom: 28px; display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap;
}
.syl-bar-wrap { display: flex; flex-direction: column; align-items: center; gap: 4px; flex: 1; min-width: 50px; }
.syl-bar-outer { width: 100%; display: flex; flex-direction: column; align-items: center; height: 100px; justify-content: flex-end; }
.syl-bar { width: 60%; min-height: 4px; border-radius: 4px 4px 0 0; background: var(--primary); transition: height .6s; }
.syl-label { font-size: 0.75rem; color: var(--text-muted); }
.syl-count { font-size: 0.82rem; font-weight: 600; }

/* ─── Unknown words ─── */
.unknown-section {
  background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 20px 24px; margin-bottom: 28px; display: flex; flex-wrap: wrap; gap: 8px;
}
.unknown-tag {
  background: #fdecea; color: #c0392b; border: 1px solid #f5c6c2;
  border-radius: 20px; padding: 4px 12px; font-size: 0.85rem;
}

/* ─── Highlighted text ─── */
.highlighted-text {
  background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 24px; margin-bottom: 28px; line-height: 2; font-size: 0.97rem;
}
.highlighted-text .w { display: inline; }
.freq-high { background: rgba(39,174,96,.18); border-bottom: 2px solid #27ae60; border-radius: 2px; }
.freq-mid  { background: rgba(52,152,219,.14); border-bottom: 2px solid #3498db; border-radius: 2px; }
.freq-low  { background: rgba(155,89,182,.12); border-bottom: 2px solid #9b59b6; border-radius: 2px; }
.freq-none { background: rgba(231,76,60,.12);  border-bottom: 2px solid #e74c3c; border-radius: 2px; }
.legend-inline { font-size: 0.78rem; font-weight: 400; color: var(--text-muted); margin-left: 10px; }

/* ─── Footer ─── */
footer {
  text-align: center; padding: 22px 18px; font-size: 0.78rem;
  color: var(--text-muted); border-top: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 4px;
}
.footer-author { font-size: 0.8rem; color: var(--text); }
.footer-copy   { font-size: 0.74rem; opacity: .7; }

/* ─── Citation bar ─── */
.citation-bar {
  background: var(--surface2); border-top: 1px solid var(--border);
  padding: 18px 24px; margin-top: 40px;
}
.citation-bar-inner { max-width: 1100px; margin: 0 auto; }
.citation-bar-title {
  display: block; font-size: .72rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .06em; color: var(--text-muted); margin-bottom: 10px;
}
.citation-entries {
  display: flex; flex-wrap: wrap; gap: 8px 20px;
}
.cite {
  font-size: .76rem; color: var(--text-muted); line-height: 1.5;
  padding-left: 10px; border-left: 2px solid var(--border);
}
.cite em { font-style: italic; }

/* ─── Contact page ─── */
.contact-hero {
  background: linear-gradient(135deg, #4361ee 0%, #3a0ca3 100%);
  color: white; padding: 48px 24px; text-align: center;
}
.contact-hero-title { font-size: 2rem; font-weight: 700; margin-bottom: 10px; }
.contact-hero-desc  { font-size: 1rem; opacity: .85; }

.contact-wrap {
  max-width: 1000px; margin: 40px auto; padding: 0 24px;
  display: grid; grid-template-columns: 280px 1fr; gap: 32px;
}
@media(max-width:720px) { .contact-wrap { grid-template-columns: 1fr; } }

.contact-info-col { display: flex; flex-direction: column; gap: 16px; }
.contact-info-card {
  background: var(--surface); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 20px; text-align: center;
}
.contact-info-icon  { font-size: 1.6rem; margin-bottom: 8px; }
.contact-info-label { font-size: .78rem; color: var(--text-muted); margin-bottom: 4px; }
.contact-info-value { font-size: .9rem; font-weight: 600; word-break: break-all; }
.contact-info-value[href] { color: var(--primary); text-decoration: none; }
.contact-info-value[href]:hover { text-decoration: underline; }

.contact-form-col {
  background: var(--surface); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 32px;
}
.contact-form { display: flex; flex-direction: column; gap: 18px; }
.contact-field { display: flex; flex-direction: column; gap: 6px; }
.contact-field label { font-size: .85rem; font-weight: 600; }
.contact-field input, .contact-field textarea {
  padding: 10px 14px; border: 1.5px solid var(--border); border-radius: 8px;
  font-size: .9rem; font-family: inherit; background: var(--bg); color: var(--text);
  transition: border-color .15s;
}
.contact-field input:focus, .contact-field textarea:focus {
  outline: none; border-color: var(--primary);
}
.contact-field textarea { resize: vertical; min-height: 120px; }
.req { color: #e74c3c; }

.contact-success {
  background: #e8f8f0; border: 1.5px solid #27ae60; color: #1a7a42;
  border-radius: 8px; padding: 16px 20px; margin-bottom: 20px; font-weight: 500;
}
.contact-error {
  background: #fdecea; border: 1.5px solid #e74c3c; color: #c0392b;
  border-radius: 8px; padding: 16px 20px; margin-bottom: 20px; font-weight: 500;
}

/* ════════════════════════════════════════
   TOOL PAGES
   ════════════════════════════════════════ */

/* Tool hero */
.tool-hero {
  background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 24px 28px; margin-bottom: 20px;
  display: flex; align-items: center; gap: 18px;
}
.tool-hero-icon {
  font-size: 1.9rem; width: 58px; height: 58px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary), #3a0ca3);
  border-radius: 14px; flex-shrink: 0;
}
.tool-hero-title { font-size: 1.35rem; font-weight: 700; margin-bottom: 4px; }
.tool-hero-desc { font-size: 0.86rem; color: var(--text-muted); line-height: 1.5; }

/* Tool input */
.tool-input-section {
  background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 24px; margin-bottom: 20px;
}
.tool-controls {
  display: flex; gap: 16px; flex-wrap: wrap; align-items: center; margin: 12px 0 4px;
}
.tool-control-group {
  display: flex; align-items: center; gap: 8px; font-size: 0.88rem;
}
.tool-control-group label { color: var(--text-muted); font-size: 0.85rem; cursor: pointer; }

select, input[type="number"] {
  padding: 6px 10px; border: 1.5px solid var(--border); border-radius: 8px;
  font-size: 0.88rem; background: var(--bg); color: var(--text);
  outline: none; cursor: pointer; font-family: inherit;
}
select:focus, input[type="number"]:focus { border-color: var(--primary); }

/* Tool results */
.tool-results {
  background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 24px; margin-bottom: 24px;
}

/* Stats grid */
.stats-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; margin-bottom: 24px;
}
.stat-box {
  background: var(--surface2); border-radius: 10px; padding: 14px 16px;
  border-left: 4px solid var(--primary);
}
.stat-box-value { font-size: 1.8rem; font-weight: 700; color: var(--primary); }
.stat-box-label { font-size: 0.77rem; color: var(--text-muted); margin-top: 2px; }

/* Result table */
.table-wrap { overflow-x: auto; border-radius: 8px; border: 1px solid var(--border); }
.result-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.result-table th {
  text-align: left; padding: 9px 14px;
  background: var(--surface2); font-weight: 600; font-size: 0.8rem;
  color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em;
}
.result-table td { padding: 8px 14px; border-bottom: 1px solid var(--border); }
.result-table tr:last-child td { border-bottom: none; }
.result-table tr:hover td { background: var(--surface2); }

/* Badges */
.badge { padding: 2px 9px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; }
.badge-green { background: #d5f5e3; color: #1e8449; }
.badge-blue  { background: #d6eaf8; color: #1a5276; }
.badge-orange{ background: #fdebd0; color: #a04000; }
.badge-red   { background: #fdecea; color: #c0392b; }

/* Mono text */
.mono-text { font-family: 'Courier New', monospace; font-size: 0.92rem; }

/* Token list */
.token-list { display: flex; flex-wrap: wrap; gap: 6px; }
.token-chip {
  padding: 3px 10px; background: var(--surface2);
  border: 1px solid var(--border); border-radius: 6px;
  font-size: 0.85rem; font-family: 'Courier New', monospace;
}
.token-chip.token-number {
  background: #fff3e0; border-color: #f0a500; color: #7a4f00;
}
.token-chip.sentence-chip {
  display: flex; align-items: baseline; gap: 8px;
  padding: 10px 14px; border-radius: 8px; font-family: inherit;
  font-size: 0.88rem; background: var(--bg); border-left: 3px solid var(--primary);
  width: 100%; margin-bottom: 4px;
}
.token-num {
  color: var(--text-muted); font-size: .78rem; font-weight: 700;
  min-width: 22px; flex-shrink: 0;
}

/* Bar chart (generic) */
.bar-chart { display: flex; flex-direction: column; gap: 8px; }
.bar-row { display: flex; align-items: center; gap: 10px; }
.bar-label {
  width: 150px; font-size: 0.82rem; color: var(--text);
  text-align: right; flex-shrink: 0;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.bar-outer { flex: 1; height: 24px; background: var(--border); border-radius: 4px; overflow: hidden; }
.bar-inner { height: 100%; border-radius: 4px; background: var(--primary); transition: width .5s ease; display: flex; align-items: center; }
.bar-value { width: 60px; font-size: 0.82rem; font-weight: 600; color: var(--text-muted); flex-shrink: 0; }

/* Syllable tool cards */
.syl-dist-bars { display: flex; flex-direction: column; gap: 10px; max-width: 500px; }
.syl-dist-bar-wrap { display: flex; align-items: center; gap: 10px; }
.syl-dist-outer { flex: 1; height: 20px; background: var(--border); border-radius: 4px; overflow: hidden; }
.syl-dist-inner { height: 100%; border-radius: 4px; transition: width .5s; }
.syl-dist-label { width: 60px; font-size: 0.82rem; color: var(--text-muted); flex-shrink: 0; }
.syl-dist-count { width: 70px; font-size: 0.82rem; font-weight: 600; text-align: right; flex-shrink: 0; }

.syl-word-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px;
}
.syl-word-card {
  background: var(--surface2); border-radius: 10px; padding: 12px 14px;
  border: 1px solid var(--border);
}
.syl-word-original { font-size: 0.82rem; color: var(--text-muted); margin-bottom: 4px; }
.syl-word-chips { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 6px; }
.syl-chip {
  background: var(--primary); color: white;
  padding: 2px 8px; border-radius: 4px; font-size: 0.82rem; font-weight: 600;
}
.syl-sep { font-weight: 700; color: var(--text-muted); font-size: 0.9rem; align-self: center; }
.syl-word-count { font-size: 0.75rem; color: var(--text-muted); }

/* Frequency tool layout */
.freq-tool-layout { display: flex; gap: 28px; flex-wrap: wrap; }
.freq-tool-chart { flex: 1.5; min-width: 280px; }
.freq-tool-table { flex: 1; min-width: 220px; }

/* Statistics tool metrics */
.metrics-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; margin-bottom: 24px;
}
.metric-card {
  background: var(--surface2); border-radius: 10px; padding: 14px 16px;
  border-left: 4px solid var(--primary);
}
.metric-value { font-size: 1.6rem; font-weight: 800; margin-bottom: 2px; }
.metric-label { font-size: 0.82rem; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.metric-desc { font-size: 0.75rem; color: var(--text-muted); line-height: 1.45; }

/* Lookup tool */
.lookup-input-row {
  display: flex; gap: 10px; margin-bottom: 12px;
}
.lookup-input-row input[type="text"] {
  flex: 1; padding: 12px 16px; border: 1.5px solid var(--border); border-radius: 10px;
  font-size: 1rem; font-family: inherit; background: var(--bg); color: var(--text);
  outline: none; transition: border-color .2s;
}
.lookup-input-row input[type="text"]:focus { border-color: var(--primary); }
.lookup-examples { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 6px; }

.lookup-word-display { text-align: center; padding: 24px 0 16px; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.lookup-main-word { font-size: 2.4rem; font-weight: 800; color: var(--text); margin-bottom: 10px; }
.lookup-syl-row { display: flex; justify-content: center; align-items: center; gap: 4px; flex-wrap: wrap; }
.lookup-syl-chip { background: var(--primary); color: white; padding: 4px 14px; border-radius: 6px; font-size: 1rem; font-weight: 600; }
.lookup-syl-sep { font-size: 1.2rem; color: var(--text-muted); font-weight: 300; }

.lookup-result-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.lookup-card {
  background: var(--surface2); border-radius: 12px; padding: 16px;
  text-align: center;
}
.lookup-card-icon { font-size: 1.5rem; margin-bottom: 6px; }
.lookup-card-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-muted); margin-bottom: 4px; }
.lookup-card-value { font-size: 1.05rem; font-weight: 700; color: var(--text); margin-bottom: 4px; word-break: break-word; }
.lookup-card-sub { font-size: 0.75rem; color: var(--text-muted); }

.freq-tier-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.freq-tier-item {
  padding: 8px 18px; border-radius: 25px; font-size: 0.88rem; font-weight: 600;
  border: 2px solid var(--border); color: var(--text-muted); opacity: 0.5;
  transition: all .2s;
}
.freq-tier-item.active { opacity: 1; }

/* Tools hub grid */
.tools-hub-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.hub-card {
  background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 20px; display: flex; align-items: center; gap: 14px;
  text-decoration: none; color: var(--text);
  border: 1.5px solid var(--border); transition: all .2s;
}
.hub-card:hover {
  border-color: var(--primary); transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(67,97,238,.12);
}
.hub-card-icon { font-size: 1.6rem; flex-shrink: 0; width: 46px; text-align: center; }
.hub-card-body { flex: 1; }
.hub-card-title { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.hub-card-desc { font-size: 0.82rem; color: var(--text-muted); line-height: 1.4; }
.hub-card-arrow { font-size: 1.2rem; color: var(--border); transition: color .2s; }
.hub-card:hover .hub-card-arrow { color: var(--primary); }

/* ─── Responsive ─── */
@media (max-width: 700px) {
  header { padding: 14px 16px; }
  main { padding: 16px 12px; }
  .formula-grid { grid-template-columns: 1fr; }
  .freq-section { flex-direction: column; }
  .cefr-level { font-size: 2.4rem; }
  .tool-hero { flex-direction: column; text-align: center; padding: 20px; }
  .bar-label { width: 100px; }
  .freq-tool-layout { flex-direction: column; }
  .nav-inner { padding: 0 12px; }
  .lookup-input-row { flex-direction: column; }
}

/* ════════════════════════════════════════
   ADMIN PANEL
   ════════════════════════════════════════ */

/* Login page */
.admin-login-body {
  background: linear-gradient(135deg, #1a1d2e 0%, #2c2f4a 100%);
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh;
}
.admin-login-wrap { width: 100%; max-width: 400px; padding: 20px; }
.admin-login-card {
  background: white; border-radius: 16px; padding: 40px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3); text-align: center;
}
.admin-login-logo { font-size: 2.8rem; margin-bottom: 10px; }
.admin-login-title { font-size: 1.4rem; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.admin-login-sub { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 28px; }
.admin-login-error {
  background: #fdecea; color: #c0392b; border: 1px solid #f5c6c2;
  border-radius: 8px; padding: 10px 14px; font-size: .87rem; margin-bottom: 16px; text-align: left;
}
.admin-login-form { text-align: left; }
.admin-form-group { margin-bottom: 16px; }
.admin-form-group label { display: block; font-size: .85rem; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.admin-form-group input {
  width: 100%; padding: 10px 14px; border: 1.5px solid var(--border);
  border-radius: 8px; font-size: .95rem; font-family: inherit;
  background: var(--bg); outline: none; transition: border-color .2s;
}
.admin-form-group input:focus { border-color: var(--primary); }
.admin-login-btn {
  width: 100%; padding: 12px; background: var(--primary); color: white;
  border: none; border-radius: 25px; font-size: 1rem; font-weight: 600;
  cursor: pointer; margin-top: 8px; transition: background .2s;
}
.admin-login-btn:hover { background: var(--primary-dark); }
.admin-login-back {
  display: block; margin-top: 20px; font-size: .82rem;
  color: var(--text-muted); text-decoration: none;
}
.admin-login-back:hover { color: var(--primary); }

/* Admin layout */
.admin-body { background: #f0f2f8; flex-direction: row; }
.admin-layout { display: flex; min-height: 100vh; width: 100%; }

/* Sidebar */
.admin-sidebar {
  width: 230px; flex-shrink: 0;
  background: #1a1d2e; color: white;
  display: flex; flex-direction: column;
  position: fixed; top: 0; left: 0; bottom: 0; z-index: 50;
  overflow-y: auto;
}
.admin-brand {
  display: flex; align-items: center; gap: 12px;
  padding: 20px 18px; text-decoration: none; color: white;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.admin-brand:hover { opacity: .9; }
.admin-brand-icon { font-size: 1.6rem; }
.admin-brand-title { font-size: .97rem; font-weight: 700; }
.admin-brand-sub { font-size: .72rem; opacity: .6; margin-top: 1px; }

.admin-nav { flex: 1; padding: 14px 10px; }
.admin-nav-section {
  font-size: .68rem; text-transform: uppercase; letter-spacing: .1em;
  opacity: .45; padding: 10px 10px 6px; font-weight: 600;
}
.admin-nav-link {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; border-radius: 8px;
  font-size: .87rem; color: rgba(255,255,255,0.65);
  text-decoration: none; transition: all .15s; margin-bottom: 2px;
}
.admin-nav-link:hover { background: rgba(255,255,255,0.08); color: white; }
.admin-nav-link.active { background: var(--primary); color: white; }
.admin-nav-link span { font-size: 1rem; }

.admin-sidebar-footer {
  padding: 14px 10px; border-top: 1px solid rgba(255,255,255,0.08);
}
.admin-logout-btn {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; border-radius: 8px;
  font-size: .87rem; color: rgba(255,255,255,0.5);
  text-decoration: none; transition: all .15s;
}
.admin-logout-btn:hover { background: rgba(231,76,60,.15); color: #e74c3c; }

/* Main area */
.admin-main {
  margin-left: 230px; flex: 1; display: flex; flex-direction: column;
  min-height: 100vh;
}
.admin-topbar {
  background: white; border-bottom: 1px solid var(--border);
  padding: 0 28px; height: 58px;
  display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 40;
  box-shadow: 0 1px 4px rgba(0,0,0,.04);
}
.admin-page-title { font-size: 1.1rem; font-weight: 700; color: var(--text); }
.admin-topbar-right { display: flex; align-items: center; gap: 12px; }
.admin-badge-user {
  background: var(--surface2); color: var(--text-muted);
  padding: 5px 12px; border-radius: 20px; font-size: .82rem;
}

.admin-content { padding: 24px 28px; flex: 1; }

/* Stats cards */
.admin-stats-row {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px; margin-bottom: 20px;
}
.admin-stat-card {
  background: white; border-radius: 12px; padding: 18px 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,.05);
  display: flex; align-items: center; gap: 14px;
}
.admin-stat-icon {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; flex-shrink: 0;
}
.admin-stat-value { font-size: 1.8rem; font-weight: 800; color: var(--text); line-height: 1; }
.admin-stat-label { font-size: .78rem; color: var(--text-muted); margin-top: 3px; }

/* Charts row */
.admin-charts-row { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }

/* Admin card */
.admin-card {
  background: white; border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,.05);
  overflow: hidden;
}
.admin-card-header {
  padding: 14px 20px; font-size: .9rem; font-weight: 700;
  border-bottom: 1px solid var(--border); color: var(--text);
}
.admin-card-body { padding: 18px 20px; }
.admin-empty { color: var(--text-muted); font-size: .88rem; text-align: center; }

/* Admin bar chart */
.admin-bar-chart { display: flex; flex-direction: column; gap: 8px; }
.admin-bar-row { display: flex; align-items: center; gap: 8px; }
.admin-bar-label {
  width: 155px; font-size: .8rem; color: var(--text); flex-shrink: 0;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.admin-bar-outer { flex: 1; height: 18px; background: #f0f2f8; border-radius: 3px; overflow: hidden; }
.admin-bar-inner { height: 100%; background: var(--primary); border-radius: 3px; transition: width .5s; min-width: 4px; }
.admin-bar-val { width: 36px; font-size: .82rem; font-weight: 600; color: var(--text-muted); text-align: right; }

/* Daily chart */
.admin-daily-chart {
  display: flex; align-items: flex-end; gap: 8px;
  height: 120px; padding-top: 24px;
}
.admin-daily-col { display: flex; flex-direction: column; align-items: center; gap: 4px; flex: 1; }
.admin-daily-count { font-size: .72rem; font-weight: 600; color: var(--text-muted); }
.admin-daily-bar-outer { flex: 1; width: 100%; display: flex; align-items: flex-end; }
.admin-daily-bar {
  width: 100%; background: var(--primary); border-radius: 3px 3px 0 0;
  min-height: 3px; transition: height .5s;
}
.admin-daily-label { font-size: .72rem; color: var(--text-muted); white-space: nowrap; }

/* Admin table */
.admin-table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.admin-table th {
  text-align: left; padding: 10px 16px;
  background: #f7f8fc; font-weight: 600; font-size: .78rem;
  color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em;
  border-bottom: 1px solid var(--border);
}
.admin-table td { padding: 10px 16px; border-bottom: 1px solid #f0f2f8; }
.admin-table tr:last-child td { border-bottom: none; }
.admin-table tr:hover td { background: #fafbff; }

/* Tool badge */
.admin-tool-badge {
  display: inline-block; padding: 3px 10px; border-radius: 20px;
  font-size: .78rem; font-weight: 600;
  background: #e8f0fe; color: #3451d1;
}

/* Pagination */
.admin-pagination {
  display: flex; gap: 6px; justify-content: center;
  flex-wrap: wrap; margin-top: 20px;
}
.admin-page-btn {
  padding: 7px 14px; border-radius: 8px; font-size: .85rem; font-weight: 500;
  background: white; color: var(--text); text-decoration: none;
  border: 1px solid var(--border); transition: all .15s;
}
.admin-page-btn:hover { border-color: var(--primary); color: var(--primary); }
.admin-page-btn.active { background: var(--primary); color: white; border-color: var(--primary); }
.admin-page-ellipsis { padding: 7px 6px; color: var(--text-muted); font-size: .85rem; }

/* Responsive admin */
@media (max-width: 768px) {
  .admin-sidebar { width: 200px; }
  .admin-main { margin-left: 200px; }
  .admin-content { padding: 16px; }
  .admin-charts-row { flex-direction: column; }
}
@media (max-width: 560px) {
  .admin-sidebar { display: none; }
  .admin-main { margin-left: 0; }
}