/* Statistics Calculator - Shared Component Styles (Rose Theme) */

:root {
    --stat-tool: #e11d48;
    --stat-tool-dark: #be123c;
    --stat-gradient: linear-gradient(135deg, #e11d48 0%, #f43f5e 100%);
    --stat-light: #fff1f2;
}
[data-theme="dark"] {
    --stat-light: rgba(225, 29, 72, 0.15);
}

/* ===== Mode Toggle (sample/population) ===== */
.stat-mode-toggle {
    display: flex;
    border: 1.5px solid var(--border);
    border-radius: 0.5rem;
    overflow: hidden;
    margin-bottom: 1rem;
}
.stat-mode-btn {
    flex: 1;
    padding: 0.5rem 0.75rem;
    font-weight: 600;
    font-size: 0.75rem;
    border: none;
    cursor: pointer;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    transition: all 0.15s;
    font-family: var(--font-sans);
    text-align: center;
    white-space: nowrap;
}
.stat-mode-btn.active {
    background: var(--stat-gradient);
    color: #fff;
}
.stat-mode-btn:hover:not(.active) {
    background: var(--bg-tertiary);
}
[data-theme="dark"] .stat-mode-btn { background: var(--bg-tertiary); }
[data-theme="dark"] .stat-mode-btn.active { background: var(--stat-gradient); color: #fff; }

/* ===== Input Groups ===== */
.stat-input-group {
    margin-bottom: 0.75rem;
}
.stat-input-label {
    display: block;
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}
.stat-input-text {
    width: 100%;
    padding: 0.625rem 0.75rem;
    font-size: 0.875rem;
    font-family: var(--font-mono);
    border: 1.5px solid var(--border);
    border-radius: 0.375rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color 0.15s;
    line-height: 1.5;
}
textarea.stat-input-text {
    resize: vertical;
    min-height: 120px;
}
input.stat-input-text {
    padding: 0.5rem 0.75rem;
    font-family: var(--font-sans);
}
.stat-input-text:focus {
    outline: none;
    border-color: var(--stat-tool);
    box-shadow: 0 0 0 2px rgba(225, 29, 72, 0.1);
}

/* ===== Live Preview ===== */
.stat-preview {
    min-height: 2rem;
    padding: 0.5rem 0.75rem;
    border: 1.5px dashed var(--border);
    border-radius: 0.5rem;
    background: var(--bg-secondary);
    font-size: 0.8125rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}
.stat-preview-count {
    font-weight: 700;
    color: var(--stat-tool);
    font-family: var(--font-mono);
}
[data-theme="dark"] .stat-preview { background: var(--bg-tertiary); }

/* ===== Output Tabs ===== */
.stat-output-tabs {
    display: flex;
    border: 1.5px solid var(--border);
    border-radius: 0.5rem;
    overflow: hidden;
}
.stat-output-tab {
    flex: 1;
    padding: 0.5rem;
    font-weight: 600;
    font-size: 0.8125rem;
    border: none;
    cursor: pointer;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    transition: all 0.15s;
    font-family: var(--font-sans);
    text-align: center;
}
.stat-output-tab.active {
    background: var(--stat-gradient);
    color: #fff;
}
.stat-output-tab:hover:not(.active) {
    background: var(--bg-tertiary);
}
[data-theme="dark"] .stat-output-tab { background: var(--bg-tertiary); }
[data-theme="dark"] .stat-output-tab.active { background: var(--stat-gradient); color: #fff; }

/* ===== Panels ===== */
.stat-panel { display: none; flex: 1; min-height: 0; }
.stat-panel.active { display: flex; flex-direction: column; }

/* ===== Step Display ===== */
.stat-step {
    display: flex;
    gap: 0.75rem;
    padding: 0.75rem;
    margin: 0.5rem 0;
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    border-left: 3px solid var(--stat-tool);
    transition: background 0.15s;
}
.stat-step:hover { background: var(--bg-tertiary); }
.stat-step-number {
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    background: var(--stat-gradient);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.6875rem;
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 0.125rem;
}
.stat-step-content { flex: 1; min-width: 0; max-width: 100%; overflow: hidden; }
.stat-step-desc {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.375rem;
}
.stat-step-math {
    overflow-x: auto;
    overflow-y: hidden;
    padding: 0.25rem 0;
    max-width: 100%;
}
.stat-step-math .katex-display { margin: 0; overflow-x: auto; overflow-y: hidden; max-width: 100%; }
.stat-step-math .katex { font-size: 0.9em; max-width: 100%; }
[data-theme="dark"] .stat-step { background: var(--bg-tertiary); }

/* ===== Result Badge ===== */
.stat-result-badge {
    display: inline-block;
    background: var(--stat-gradient);
    color: #fff;
    padding: 0.2rem 0.625rem;
    border-radius: 0.75rem;
    font-size: 0.6875rem;
    font-weight: 600;
    margin-right: 0.375rem;
    margin-bottom: 0.375rem;
}

/* ===== Stat Sections (grouped rows) ===== */
.stat-section {
    margin-bottom: 1rem;
}
.stat-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--stat-tool);
    margin-bottom: 0.5rem;
    padding-bottom: 0.375rem;
    border-bottom: 2px solid var(--stat-light);
    display: flex;
    align-items: center;
    gap: 0.375rem;
}
.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 0.375rem 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.8125rem;
}
.stat-row:last-child { border-bottom: none; }
.stat-label {
    font-weight: 500;
    color: var(--text-primary);
}
.stat-value {
    font-weight: 600;
    color: var(--stat-tool);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
}

/* ===== Frequency Table ===== */
.stat-freq-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.75rem;
    margin-top: 0.5rem;
}
.stat-freq-table th, .stat-freq-table td {
    padding: 0.375rem 0.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
.stat-freq-table th {
    font-weight: 600;
    color: #fff;
    background: var(--stat-gradient);
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}
.stat-freq-table td {
    color: var(--text-secondary);
    font-family: var(--font-mono);
}
.stat-freq-table tr:hover td { background: var(--bg-secondary); }
[data-theme="dark"] .stat-freq-table th { background: var(--stat-gradient); }

/* ===== Interpretation Boxes ===== */
.stat-interpretation {
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    margin: 0.75rem 0;
    font-size: 0.8125rem;
    line-height: 1.6;
}
.stat-interpretation-normal {
    background: linear-gradient(135deg, #d1fae5, var(--bg-primary));
    border-left: 4px solid #10b981;
    color: #065f46;
}
.stat-interpretation-warning {
    background: linear-gradient(135deg, #fef3c7, var(--bg-primary));
    border-left: 4px solid #f59e0b;
    color: #92400e;
}
[data-theme="dark"] .stat-interpretation-normal {
    background: rgba(16, 185, 129, 0.15);
    color: #6ee7b7;
}
[data-theme="dark"] .stat-interpretation-warning {
    background: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
}

/* ===== Example Chips ===== */
.stat-examples {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}
.stat-example-chip {
    padding: 0.3rem 0.625rem;
    font-size: 0.6875rem;
    font-weight: 500;
    border-radius: 2rem;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
    font-family: var(--font-sans);
}
.stat-example-chip:hover {
    background: var(--stat-light);
    color: var(--stat-tool);
    border-color: var(--stat-tool);
}
[data-theme="dark"] .stat-example-chip { background: var(--bg-tertiary); border-color: var(--border); color: var(--text-secondary); }
[data-theme="dark"] .stat-example-chip:hover { background: var(--stat-light); color: var(--stat-tool); }

/* ===== Educational Content ===== */
.stat-edu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0.75rem;
    margin: 1rem 0;
}
.stat-edu-card {
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    border-left: 3px solid var(--stat-tool);
}
.stat-edu-card h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.375rem;
}
.stat-edu-card p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
}
[data-theme="dark"] .stat-edu-card { background: var(--bg-tertiary); }

/* ===== Feature Cards ===== */
.stat-feature-card {
    padding: 1.25rem;
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    transition: transform 0.2s, box-shadow 0.2s;
}
.stat-feature-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(225, 29, 72, 0.15);
}
.stat-feature-card h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0.5rem 0 0.375rem;
}
.stat-feature-card p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
}
[data-theme="dark"] .stat-feature-card { background: var(--bg-tertiary); border-color: var(--border); }

/* ===== Formula Box ===== */
.stat-formula-box {
    background: var(--bg-secondary);
    border-left: 3px solid var(--stat-tool);
    padding: 0.75rem 1rem;
    border-radius: 0 0.375rem 0.375rem 0;
    margin: 0.75rem 0;
    font-family: var(--font-mono);
    font-size: 0.9375rem;
    color: var(--text-primary);
    overflow-x: auto;
}
.stat-formula-box .katex { font-size: 1em; }
[data-theme="dark"] .stat-formula-box { background: var(--bg-tertiary); }

/* ===== Worked Example ===== */
.stat-worked-example {
    background: var(--bg-secondary);
    padding: 1rem 1.25rem;
    border-radius: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 2;
    overflow-x: auto;
    color: var(--text-primary);
    margin: 0.75rem 0;
}
[data-theme="dark"] .stat-worked-example { background: var(--bg-tertiary); }

/* ===== Ops Table ===== */
.stat-ops-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
    margin-top: 0.75rem;
}
.stat-ops-table th, .stat-ops-table td {
    padding: 0.5rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
.stat-ops-table th {
    font-weight: 600;
    color: var(--text-primary);
    background: var(--bg-secondary);
}
.stat-ops-table td {
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.75rem;
}
[data-theme="dark"] .stat-ops-table th { background: var(--bg-tertiary); }

/* ===== Checkbox Options ===== */
.stat-checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}
.stat-checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    color: var(--text-primary);
    cursor: pointer;
}
.stat-checkbox input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    accent-color: var(--stat-tool);
    cursor: pointer;
}

/* ===== Error ===== */
.stat-error {
    background: #fef3c7;
    border: 1px solid #fbbf24;
    border-radius: 0.5rem;
    padding: 1.25rem;
    color: #92400e;
}
.stat-error h4 { margin: 0 0 0.5rem; font-size: 0.9375rem; font-weight: 700; }
.stat-error p { margin: 0; font-size: 0.8125rem; line-height: 1.6; }
[data-theme="dark"] .stat-error { background: rgba(251, 191, 36, 0.15); border-color: rgba(251, 191, 36, 0.3); color: #fbbf24; }

/* ===== Separator ===== */
.stat-sep {
    border: none;
    border-top: 1px solid var(--border);
    margin: 0.75rem 0;
}

/* ===== Spinner ===== */
@keyframes stat-spin { to { transform: rotate(360deg); } }
.stat-spinner {
    width: 14px;
    height: 14px;
    border: 2px solid var(--border);
    border-top-color: var(--stat-tool);
    border-radius: 50%;
    animation: stat-spin 0.6s linear infinite;
    display: inline-block;
}

/* ===== Overflow Prevention ===== */
.tool-output-column { min-width: 0; }
#stat-result-content { min-width: 0; overflow-x: auto; overflow-y: auto; }

/* ===== Graph Container ===== */
#stat-graph-container { width: 100%; min-height: 440px; border-radius: 0.5rem; }

/* ===== Scroll Reveal Animations ===== */
.stat-anim {
    opacity: 0;
    transform: translateY(1rem);
    transition: opacity 0.5s ease, transform 0.5s ease;
}
.stat-anim.stat-visible { opacity: 1; transform: translateY(0); }
.stat-anim-d1 { transition-delay: 0.1s; }
.stat-anim-d2 { transition-delay: 0.2s; }
.stat-anim-d3 { transition-delay: 0.3s; }
.stat-anim-d4 { transition-delay: 0.4s; }

/* ===== Animated Bell Curve SVG ===== */
.stat-bell-animated .bell-path {
    stroke-dasharray: 500;
    stroke-dashoffset: 500;
    animation: stat-draw-bell 2s ease forwards;
}
@keyframes stat-draw-bell { to { stroke-dashoffset: 0; } }

/* ===== Animated Data Flow SVG ===== */
.stat-data-flow .data-dot {
    animation: stat-flow 1.5s ease infinite;
}
@keyframes stat-flow {
    0% { opacity: 0; transform: translateY(-10px); }
    50% { opacity: 1; }
    100% { opacity: 0; transform: translateY(10px); }
}

/* ===== FAQ Toggle ===== */
.stat-faq-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0.875rem 0;
    background: none;
    border: none;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    text-align: left;
    font-family: var(--font-sans);
    gap: 0.75rem;
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
    .stat-anim { opacity: 1; transform: none; transition: none; }
    .stat-bell-animated .bell-path { animation: none; stroke-dashoffset: 0; }
    .stat-data-flow .data-dot { animation: none; opacity: 1; }
    .stat-feature-card { transition: none; }
}

/* ===== ANOVA Group Inputs ===== */
.av-group-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 0.75rem;
    margin-bottom: 0.5rem;
}
[data-theme="dark"] .av-group-box { background: var(--bg-tertiary); border-color: var(--border); }
.av-group-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.375rem;
}
.av-group-header h5 {
    margin: 0;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-primary);
}
.av-remove-group-btn {
    background: none;
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s;
    line-height: 1;
}
.av-remove-group-btn:hover {
    background: #fef2f2;
    border-color: #ef4444;
    color: #ef4444;
}
[data-theme="dark"] .av-remove-group-btn:hover { background: rgba(239, 68, 68, 0.15); }

/* ===== Compact Textarea (for ANOVA groups, etc.) ===== */
.stat-textarea {
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
    font-family: var(--font-mono);
    border: 1.5px solid var(--border);
    border-radius: 0.375rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color 0.15s;
    line-height: 1.5;
    resize: vertical;
    min-height: 50px;
}
.stat-textarea:focus {
    outline: none;
    border-color: var(--stat-tool);
    box-shadow: 0 0 0 2px rgba(225, 29, 72, 0.1);
}
[data-theme="dark"] .stat-textarea { background: var(--bg-secondary); border-color: var(--border); }

/* ===== Responsive ===== */
@media (max-width: 900px) {
    .stat-row { font-size: 0.75rem; }
    .stat-freq-table { font-size: 0.6875rem; }
}

@media (max-width: 640px) {
    .stat-mode-toggle { flex-wrap: wrap; }
    .stat-mode-btn { flex: 1 1 50%; font-size: 0.6875rem; }
    .stat-edu-grid { grid-template-columns: 1fr; }
    .stat-step-math .katex { font-size: 0.8em; }
    .stat-section-title { font-size: 0.6875rem; }
}