/* ═══════════════════════════════════════════════
   TBI Statistics Calculator — style.css
   Design system matches /online app
═══════════════════════════════════════════════ */

:root {
    --primary: #2563EB;
    --primary-dark: #1D4ED8;
    --primary-light: #EFF6FF;
    --gold: #D97706;
    --gold-light: #FEF3C7;
    --green: #059669;
    --green-light: #ECFDF5;
    --purple: #7C3AED;
    --purple-light: #F5F3FF;
    --red: #DC2626;
    --red-light: #FEF2F2;
    --text: #0F172A;
    --text-muted: #64748B;
    --border: rgba(0,0,0,0.07);
    --glass-bg: rgba(255,255,255,0.85);
    --shadow: 0 4px 24px rgba(37,99,235,0.08);
    --shadow-lg: 0 12px 40px rgba(37,99,235,0.14);
}

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

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background: linear-gradient(135deg, #EFF6FF 0%, #F5F3FF 50%, #FFF7ED 100%);
    min-height: 100vh;
    color: var(--text);
    font-size: 0.92rem;
}

/* ── Blobs ── */
.blob-container { position: fixed; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }
.blob { position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.3; animation: blobFloat 12s ease-in-out infinite; }
.blob-1 { width: 500px; height: 500px; background: radial-gradient(circle, rgba(37,99,235,0.35) 0%, transparent 70%); top: -100px; left: -100px; }
.blob-2 { width: 400px; height: 400px; background: radial-gradient(circle, rgba(217,119,6,0.3) 0%, transparent 70%); bottom: -100px; right: -100px; animation-delay: -6s; }
@keyframes blobFloat { 0%,100%{transform:translate(0,0)} 33%{transform:translate(20px,-20px)} 66%{transform:translate(-10px,15px)} }

/* ── Navbar ── */
.tbi-nav {
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 0.8rem 0;
    position: sticky; top: 0; z-index: 1000;
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; }
.nav-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.nav-brand img { height: 36px; }
.nav-brand-name { font-weight: 700; color: var(--text); font-size: 0.93rem; }
.nav-right { display: flex; align-items: center; gap: 8px; font-size: 0.82rem; color: var(--text-muted); }
.nav-right a { color: var(--primary); text-decoration: none; }
.nav-badge { background: var(--primary); color: white; padding: 3px 10px; border-radius: 20px; font-size: 0.73rem; font-weight: 600; }

/* ── Hero ── */
.tool-hero { position: relative; z-index: 1; padding: 36px 0 24px; text-align: center; }
.tool-tag { display: inline-flex; align-items: center; gap: 6px; background: rgba(37,99,235,0.08); color: var(--primary); border: 1px solid rgba(37,99,235,0.2); padding: 4px 14px; border-radius: 20px; font-size: 0.76rem; font-weight: 600; margin-bottom: 14px; }
.tool-title { font-size: 2.1rem; font-weight: 800; line-height: 1.2; margin-bottom: 10px; }
.tool-title .blue { color: var(--primary); }
.tool-title .gold { color: var(--gold); }
.tool-sub { color: var(--text-muted); font-size: 0.95rem; max-width: 620px; margin: 0 auto; line-height: 1.65; }

/* ── Layout ── */
.app-layout { position: relative; z-index: 1; padding-bottom: 60px; }
.input-panel { position: sticky; top: 76px; }

/* ── Glass Card ── */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.9);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 22px;
    margin-bottom: 18px;
}
.glass-card.compact { padding: 16px; }
.card-title { font-size: 0.87rem; font-weight: 700; color: var(--text); margin-bottom: 14px; display: flex; align-items: center; gap: 7px; }
.card-title i { color: var(--primary); font-size: 1rem; }

/* ── Data Input ── */
#dataInput {
    width: 100%; min-height: 130px;
    border: 1.5px solid var(--border); border-radius: 12px;
    padding: 11px 13px;
    font-family: 'Plus Jakarta Sans', monospace; font-size: 0.84rem;
    background: rgba(255,255,255,0.7); color: var(--text);
    resize: vertical; transition: border-color 0.2s;
}
#dataInput:focus { outline: none; border-color: var(--primary); background: white; }
#dataInput::placeholder { color: #94A3B8; }

.input-actions { display: flex; gap: 7px; margin-top: 10px; flex-wrap: wrap; }

/* ── Buttons ── */
.btn-primary-sm {
    background: var(--primary); color: white; border: none;
    padding: 8px 16px; border-radius: 10px; font-size: 0.81rem; font-weight: 600;
    cursor: pointer; font-family: inherit;
    display: inline-flex; align-items: center; gap: 5px;
    transition: background 0.2s;
}
.btn-primary-sm:hover { background: var(--primary-dark); }
.btn-outline-sm {
    background: transparent; color: var(--primary);
    border: 1.5px solid rgba(37,99,235,0.3);
    padding: 7px 13px; border-radius: 10px; font-size: 0.81rem; font-weight: 600;
    cursor: pointer; font-family: inherit;
    display: inline-flex; align-items: center; gap: 5px;
    transition: all 0.2s;
}
.btn-outline-sm:hover { background: var(--primary-light); border-color: var(--primary); }
.btn-icon { padding: 7px 9px; }

/* ── Data chips ── */
.data-chips { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 10px; max-height: 75px; overflow-y: auto; }
.chip { padding: 2px 9px; border-radius: 20px; font-size: 0.74rem; font-weight: 600; }
.chip.normal { background: var(--primary-light); color: var(--primary); }
.chip.outlier { background: var(--red-light); color: var(--red); }

/* ── Summary pills ── */
.data-summary { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; margin-top: 12px; }
.summary-pill { background: rgba(255,255,255,0.7); border: 1px solid var(--border); border-radius: 10px; padding: 8px 10px; text-align: center; }
.summary-pill .val { font-weight: 800; font-size: 1.05rem; color: var(--primary); display: block; }
.summary-pill .lbl { font-size: 0.69rem; color: var(--text-muted); font-weight: 500; }

/* ── Toggle group ── */
.toggle-group { display: flex; gap: 4px; }
.toggle-opt {
    padding: 5px 12px; border-radius: 8px; font-size: 0.77rem; font-weight: 600;
    cursor: pointer; border: 1.5px solid var(--border); background: white;
    color: var(--text-muted); transition: all 0.15s; font-family: inherit;
}
.toggle-opt.active { background: var(--primary); color: white; border-color: var(--primary); }

/* ── Edu mode toggle ── */
.toggle-switch { position: relative; width: 34px; height: 19px; display: inline-block; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider { position: absolute; inset: 0; background: #CBD5E1; border-radius: 20px; cursor: pointer; transition: 0.2s; }
.toggle-slider:before { position: absolute; content: ""; height: 13px; width: 13px; left: 3px; bottom: 3px; background: white; border-radius: 50%; transition: 0.2s; }
.toggle-switch input:checked + .toggle-slider { background: var(--primary); }
.toggle-switch input:checked + .toggle-slider:before { transform: translateX(15px); }

/* ── Tabs ── */
.analysis-tabs {
    display: flex; gap: 3px; flex-wrap: wrap;
    background: rgba(255,255,255,0.6); backdrop-filter: blur(10px);
    border: 1px solid var(--border); border-radius: 14px;
    padding: 5px; margin-bottom: 18px;
}
.tab-btn {
    background: transparent; border: none;
    padding: 8px 15px; border-radius: 10px;
    font-size: 0.81rem; font-weight: 600; color: var(--text-muted);
    cursor: pointer; font-family: inherit;
    display: inline-flex; align-items: center; gap: 5px;
    transition: all 0.2s; white-space: nowrap;
}
.tab-btn:hover { background: var(--primary-light); color: var(--primary); }
.tab-btn.active { background: var(--primary); color: white; }
.tab-panel { display: none; animation: fadeIn 0.25s ease; }
.tab-panel.active { display: block; }
@keyframes fadeIn { from{opacity:0;transform:translateY(6px)} to{opacity:1;transform:translateY(0)} }

/* ── Stats Table ── */
.stats-table { width: 100%; border-collapse: collapse; }
.stats-table th { background: var(--primary-light); color: var(--primary); font-size: 0.76rem; font-weight: 700; padding: 9px 13px; text-align: left; border-bottom: 2px solid rgba(37,99,235,0.15); }
.stats-table td { padding: 8px 13px; border-bottom: 1px solid var(--border); font-size: 0.84rem; vertical-align: middle; }
.stats-table tr:hover td { background: rgba(37,99,235,0.025); }
.stats-value { font-weight: 700; color: var(--text); }
.stats-label { color: var(--text-muted); }
.formula-badge { background: rgba(37,99,235,0.08); color: var(--primary); padding: 1px 7px; border-radius: 5px; font-size: 0.69rem; font-family: monospace; }
.section-header td { background: var(--primary-light) !important; color: var(--primary); font-size: 0.71rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; padding: 5px 13px !important; }

/* ── Step by step ── */
.step-box { background: rgba(37,99,235,0.04); border: 1px solid rgba(37,99,235,0.12); border-radius: 12px; padding: 13px; margin-top: 12px; font-size: 0.81rem; line-height: 1.7; }
.step-box h6 { color: var(--primary); font-weight: 700; margin-bottom: 6px; font-size: 0.81rem; }
.step-box code { background: rgba(37,99,235,0.08); padding: 1px 6px; border-radius: 4px; color: var(--primary); font-size: 0.77rem; }

/* ── Outliers ── */
.outlier-box { background: var(--red-light); border: 1px solid #FECACA; border-radius: 12px; padding: 13px; margin-top: 12px; }
.outlier-box h6 { color: var(--red); font-weight: 700; font-size: 0.81rem; margin-bottom: 7px; }
.outlier-list { display: flex; flex-wrap: wrap; gap: 5px; }
.outlier-val { background: #FECACA; color: var(--red); padding: 2px 9px; border-radius: 20px; font-size: 0.77rem; font-weight: 700; }

/* ── Frequency Table ── */
.freq-table { width: 100%; border-collapse: collapse; }
.freq-table th { background: var(--gold-light); color: #92400E; font-size: 0.76rem; font-weight: 700; padding: 9px 13px; border-bottom: 2px solid rgba(217,119,6,0.2); text-align: left; }
.freq-table td { padding: 8px 13px; border-bottom: 1px solid var(--border); font-size: 0.83rem; }
.freq-bar-cell { width: 120px; }
.freq-bar { height: 7px; background: var(--gold); border-radius: 4px; display: inline-block; min-width: 3px; }

/* ── Charts ── */
.chart-header { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.chart-header .card-title { margin: 0; flex: 1; }
.chart-wrap { position: relative; height: 280px; }
.chart-control { display: flex; align-items: center; gap: 5px; font-size: 0.77rem; color: var(--text-muted); font-weight: 600; }
.chart-control input[type=number] { width: 52px; border: 1.5px solid var(--border); border-radius: 7px; padding: 4px 8px; font-size: 0.78rem; background: white; font-family: inherit; }
.chart-control label { display: flex; align-items: center; gap: 4px; cursor: pointer; }

/* ── Probability ── */
.prob-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 11px; margin-bottom: 14px; }
.prob-field label { font-size: 0.76rem; font-weight: 600; color: var(--text-muted); display: block; margin-bottom: 4px; }
.prob-field input, .prob-field select {
    width: 100%; border: 1.5px solid var(--border); border-radius: 10px;
    padding: 8px 11px; font-size: 0.84rem; font-family: inherit;
    background: rgba(255,255,255,0.8); color: var(--text); transition: border-color 0.2s;
}
.prob-field input:focus, .prob-field select:focus { outline: none; border-color: var(--primary); }
.prob-result {
    background: linear-gradient(135deg, var(--primary) 0%, #7C3AED 100%);
    color: white; border-radius: 14px; padding: 18px; text-align: center; margin-top: 4px;
}
.prob-result .big { font-size: 2rem; font-weight: 800; display: block; margin-bottom: 3px; }
.prob-result .desc { font-size: 0.81rem; opacity: 0.85; }

/* ── Cite section ── */
.cite-format { background: rgba(255,255,255,0.7); border: 1px solid var(--border); border-radius: 12px; padding: 14px; margin-bottom: 10px; }
.cite-label { display: flex; justify-content: space-between; align-items: center; font-size: 0.69rem; font-weight: 700; color: var(--primary); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 7px; }
.cite-text { font-size: 0.81rem; color: var(--text); line-height: 1.65; font-family: Georgia, serif; }
.cite-code { font-size: 0.77rem; color: var(--text); line-height: 1.65; background: #F8FAFC; padding: 10px; border-radius: 8px; font-family: monospace; white-space: pre-wrap; }
.copy-btn {
    background: transparent; border: 1px solid rgba(37,99,235,0.3); color: var(--primary);
    padding: 2px 9px; border-radius: 6px; font-size: 0.69rem; font-weight: 600;
    cursor: pointer; font-family: inherit; display: inline-flex; align-items: center; gap: 3px; transition: all 0.15s;
}
.copy-btn:hover { background: var(--primary); color: white; }

/* ── Empty state ── */
.empty-state { text-align: center; padding: 44px 20px; }
.empty-state i { font-size: 2.8rem; color: rgba(37,99,235,0.2); display: block; margin-bottom: 10px; }
.empty-state p { color: var(--text-muted); font-size: 0.88rem; }

/* ── Footer ── */
.tbi-footer { background: #0F172A; color: white; padding: 22px 0; position: relative; z-index: 1; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.footer-brand { display: flex; align-items: center; gap: 9px; }
.footer-brand img { height: 26px; filter: brightness(0) invert(1) opacity(0.7); }
.footer-copy { font-size: 0.76rem; color: rgba(255,255,255,0.4); }
.footer-links a { color: rgba(255,255,255,0.55); text-decoration: none; font-size: 0.8rem; margin-left: 14px; }
.footer-links a:hover { color: white; }

/* ── Version info box ── */
.version-box { background: rgba(37,99,235,0.05); border: 1px solid rgba(37,99,235,0.12); border-radius: 12px; padding: 14px; margin-top: 16px; font-size: 0.82rem; line-height: 1.85; color: var(--text-muted); }
.version-box strong { color: var(--text); }

/* ── Responsive ── */
@media (max-width: 991px) { .input-panel { position: static; } .tool-title { font-size: 1.65rem; } }
@media (max-width: 576px) { .prob-grid { grid-template-columns: 1fr; } .tab-btn { padding: 7px 10px; font-size: 0.75rem; } .data-summary { grid-template-columns: 1fr 1fr; } }

/* ═══════════════════════════════════════════════
   INTERPRETATION & LATEX BOXES
═══════════════════════════════════════════════ */

/* ── Interpretation card wrapping formula + text ── */
.interp-box {
    background: linear-gradient(135deg, rgba(37,99,235,0.04) 0%, rgba(124,58,237,0.04) 100%);
    border: 1.5px solid rgba(37,99,235,0.14);
    border-radius: 14px;
    padding: 16px 18px;
    margin-top: 16px;
}
.interp-box + .interp-box { margin-top: 10px; }
.interp-title {
    font-size: 0.72rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.7px; color: var(--primary);
    margin-bottom: 10px; display: flex; align-items: center; gap: 6px;
}
.interp-title i { font-size: 0.95rem; }

/* ── LaTeX formula display area ── */
.formula-block {
    background: rgba(255,255,255,0.85);
    border: 1px solid rgba(37,99,235,0.12);
    border-radius: 10px;
    padding: 10px 14px;
    margin-bottom: 10px;
    text-align: center;
    font-size: 0.95rem;
    line-height: 2;
    overflow-x: auto;
}
.formula-block mjx-container { display: inline-block !important; }

/* ── Plain-English insight bullets ── */
.interp-list {
    list-style: none; padding: 0; margin: 0; font-size: 0.82rem;
    color: var(--text); line-height: 1.75;
}
.interp-list li { display: flex; gap: 8px; align-items: flex-start; margin-bottom: 4px; }
.interp-list li::before {
    content: '▸'; color: var(--primary); font-size: 0.7rem;
    margin-top: 3px; flex-shrink: 0;
}
.interp-list .hi { font-weight: 700; color: var(--primary); }
.interp-list .warn { font-weight: 700; color: var(--gold); }
.interp-list .good { font-weight: 700; color: var(--green); }
.interp-list .bad  { font-weight: 700; color: var(--red); }

/* ── Key insight pill ── */
.key-insight {
    display: inline-flex; align-items: center; gap: 6px;
    background: var(--primary-light); color: var(--primary);
    border: 1px solid rgba(37,99,235,0.22);
    border-radius: 20px; padding: 4px 12px;
    font-size: 0.76rem; font-weight: 700; margin: 4px 2px;
}
.key-insight.gold  { background: var(--gold-light); color: #92400E; border-color: rgba(217,119,6,0.2); }
.key-insight.green { background: var(--green-light); color: #065F46; border-color: rgba(5,150,105,0.2); }
.key-insight.red   { background: var(--red-light);   color: var(--red); border-color: rgba(220,38,38,0.2); }

/* ── Assumption checklist ── */
.assumption-row {
    display: flex; gap: 8px; align-items: center;
    font-size: 0.80rem; color: var(--text-muted);
    padding: 5px 0; border-bottom: 1px solid var(--border);
}
.assumption-row:last-child { border-bottom: none; }
.assumption-row .tag {
    font-size: 0.69rem; font-weight: 700; padding: 2px 8px;
    border-radius: 5px; white-space: nowrap;
}
.tag-ok  { background: var(--green-light); color: #065F46; }
.tag-chk { background: var(--gold-light);  color: #92400E; }

/* ═══════════════════════════════════════════════
   RESEARCH PAPER REPORT OUTPUT
═══════════════════════════════════════════════ */
.report-out { font-family: 'Georgia', serif; font-size: 0.88rem; line-height: 1.85; color: var(--text); }
.apa-para {
    background: rgba(255,255,255,0.7);
    border-left: 4px solid var(--primary);
    border-radius: 0 10px 10px 0;
    padding: 12px 16px; margin: 10px 0;
    font-family: 'Georgia', serif; font-size: 0.87rem;
    line-height: 1.85; white-space: pre-wrap;
}
.rpt-section { margin-bottom: 20px; }
.rpt-section-title {
    font-size: 0.79rem; font-weight: 700; color: var(--primary);
    text-transform: uppercase; letter-spacing: 0.6px;
    margin-bottom: 8px; padding-bottom: 4px;
    border-bottom: 2px solid var(--primary);
}
.report-table {
    width: 100%; border-collapse: collapse;
    font-family: 'Georgia', serif; font-size: 0.84rem; margin-bottom: 8px;
}
.report-table caption { font-style: italic; font-size: 0.82rem; color: var(--text-muted); text-align: left; margin-bottom: 6px; caption-side: top; }
.report-table th { border-top: 2px solid var(--text); border-bottom: 1px solid var(--text); padding: 5px 12px; text-align: left; font-weight: 700; font-size: 0.82rem; background: transparent; }
.report-table td { padding: 5px 12px; border: none; }
.report-table tr:last-child td { border-bottom: 2px solid var(--text); }
.rpt-note { font-style: italic; font-size: 0.78rem; color: var(--text-muted); margin-top: 4px; line-height: 1.6; }