/* Trigonometry Calculator - Shared Component Styles (all 3 pages) */

:root {
    --trig-tool: #7c3aed;
    --trig-tool-dark: #6d28d9;
    --trig-gradient: linear-gradient(135deg, #7c3aed 0%, #a78bfa 100%);
    --trig-light: #ede9fe;
}
[data-theme="dark"] {
    --trig-light: rgba(124, 58, 237, 0.15);
}

/* ===== Mode Toggle ===== */
.trig-mode-toggle {
    display: flex;
    flex-wrap: wrap;
    border: 1.5px solid var(--border);
    border-radius: 0.5rem;
    overflow: hidden;
    margin-bottom: 1rem;
}
.trig-mode-btn {
    flex: 1 1 auto;
    min-width: 0;
    padding: 0.5rem 0.25rem;
    font-weight: 600;
    font-size: 0.6875rem;
    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;
}
.trig-mode-btn.active {
    background: var(--trig-gradient);
    color: #fff;
}
.trig-mode-btn:hover:not(.active) {
    background: var(--bg-tertiary);
}
[data-theme="dark"] .trig-mode-btn { background: var(--bg-tertiary); }
[data-theme="dark"] .trig-mode-btn.active { background: var(--trig-gradient); color: #fff; }

/* ===== Unit Toggle ===== */
.trig-unit-toggle {
    display: inline-flex;
    border: 1.5px solid var(--border);
    border-radius: 0.375rem;
    overflow: hidden;
}
.trig-unit-btn {
    padding: 0.375rem 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);
}
.trig-unit-btn.active {
    background: var(--trig-tool);
    color: #fff;
}
.trig-unit-btn:hover:not(.active) {
    background: var(--bg-tertiary);
}
[data-theme="dark"] .trig-unit-btn { background: var(--bg-tertiary); }
[data-theme="dark"] .trig-unit-btn.active { background: var(--trig-tool); color: #fff; }

/* ===== Identity Select ===== */
.trig-identity-select {
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    font-family: var(--font-sans);
    border: 1.5px solid var(--border);
    border-radius: 0.375rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color 0.15s;
}
.trig-identity-select:focus {
    outline: none;
    border-color: var(--trig-tool);
    box-shadow: 0 0 0 2px rgba(124, 58, 237, 0.1);
}

/* ===== LHS / RHS Input Groups (prove mode) ===== */
.trig-lhs-group,
.trig-rhs-group {
    margin-bottom: 0.75rem;
}
.trig-equals-divider {
    text-align: center;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--trig-tool);
    margin: 0.25rem 0;
}

/* ===== Input Styles ===== */
.trig-input-group {
    margin-bottom: 0.75rem;
}
.trig-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;
}
.trig-input-text {
    width: 100%;
    padding: 0.625rem 0.75rem;
    font-size: 0.9375rem;
    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;
    letter-spacing: -0.02em;
}
.trig-input-text:focus {
    outline: none;
    border-color: var(--trig-tool);
    box-shadow: 0 0 0 2px rgba(124, 58, 237, 0.1);
}
.trig-input-small {
    width: 100%;
    padding: 0.5rem 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;
}
.trig-input-small:focus {
    outline: none;
    border-color: var(--trig-tool);
    box-shadow: 0 0 0 2px rgba(124, 58, 237, 0.1);
}

/* ===== Live Preview ===== */
.trig-preview {
    min-height: 2.5rem;
    padding: 0.5rem 0.75rem;
    border: 1.5px dashed var(--border);
    border-radius: 0.375rem;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    overflow-x: auto;
}
.trig-preview .katex { font-size: 1.05rem; }
.trig-preview .katex-display { margin: 0; }

/* ===== Output Tabs ===== */
.trig-output-tabs {
    display: flex;
    border-bottom: 2px solid var(--border);
    margin-bottom: 1rem;
    gap: 0;
}
.trig-output-tab {
    padding: 0.625rem 1rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    cursor: pointer;
    font-family: var(--font-sans);
    transition: all 0.15s;
    white-space: nowrap;
}
.trig-output-tab:hover {
    color: var(--trig-tool);
}
.trig-output-tab.active {
    color: var(--trig-tool);
    border-bottom-color: var(--trig-tool);
}

/* ===== Panels ===== */
.trig-panel {
    display: none;
    min-height: 350px;
}
.trig-panel.active {
    display: block;
}

/* ===== Step Cards ===== */
.trig-step {
    display: flex;
    gap: 0.75rem;
    padding: 0.875rem 0;
    border-bottom: 1px solid var(--border-light, #f1f5f9);
}
.trig-step:last-child {
    border-bottom: none;
}
.trig-step-number {
    width: 28px;
    height: 28px;
    min-width: 28px;
    border-radius: 50%;
    background: var(--trig-gradient);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}
.trig-step-content {
    flex: 1;
    min-width: 0;
}
.trig-step-desc {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-bottom: 0.375rem;
    line-height: 1.5;
}
.trig-step-math {
    overflow-x: auto;
    padding: 0.25rem 0;
}
.trig-step-math .katex { font-size: 1.05rem; }
.trig-step-math .katex-display { margin: 0.25rem 0; }

/* ===== Result Badge ===== */
.trig-result-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.3rem 0.75rem;
    background: var(--trig-light);
    color: var(--trig-tool);
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 9999px;
    margin-bottom: 0.75rem;
}

/* ===== Identity Grid & Cards ===== */
.trig-identity-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
    margin-top: 0.75rem;
}
.trig-identity-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-left: 3px solid var(--trig-tool);
    border-radius: 0 0.5rem 0.5rem 0;
    padding: 0.875rem 1rem;
}
.trig-identity-card-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.375rem;
}
.trig-identity-card-math {
    overflow-x: auto;
}
.trig-identity-card-math .katex { font-size: 1.05rem; }
.trig-identity-card-math .katex-display { margin: 0.25rem 0; }

/* ===== Sign Table (quadrant mode) ===== */
.trig-sign-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
    margin: 0.75rem 0;
}
.trig-sign-table th,
.trig-sign-table td {
    padding: 0.5rem 0.75rem;
    text-align: center;
    border: 1px solid var(--border);
}
.trig-sign-table th {
    background: var(--trig-light);
    color: var(--trig-tool);
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}
.trig-sign-table td {
    color: var(--text-primary);
    font-family: var(--font-mono);
}
.trig-sign-positive {
    color: #16a34a;
    font-weight: 700;
}
.trig-sign-negative {
    color: #dc2626;
    font-weight: 700;
}

/* ===== Angle Values Grid ===== */
.trig-angle-values {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.5rem;
    margin: 0.75rem 0;
}
.trig-angle-value-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    padding: 0.5rem 0.75rem;
    text-align: center;
}
.trig-angle-value-label {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: 0.25rem;
}
.trig-angle-value-math {
    overflow-x: auto;
}
.trig-angle-value-math .katex { font-size: 0.95rem; }

/* ===== Quick Examples ===== */
.trig-examples {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}
.trig-example-chip {
    padding: 0.3rem 0.625rem;
    font-size: 0.6875rem;
    font-weight: 600;
    border: 1.5px solid var(--border);
    border-radius: 9999px;
    background: var(--bg-primary);
    color: var(--text-secondary);
    cursor: pointer;
    font-family: var(--font-sans);
    transition: all 0.15s;
    white-space: nowrap;
}
.trig-example-chip:hover {
    border-color: var(--trig-tool);
    color: var(--trig-tool);
    background: var(--trig-light);
}

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

/* ===== Spinner (AI loading) ===== */
.trig-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem;
    gap: 1rem;
}
.trig-spinner-ring {
    width: 36px;
    height: 36px;
    border: 3px solid var(--border);
    border-top-color: var(--trig-tool);
    border-radius: 50%;
    animation: trig-spin 0.8s linear infinite;
}
@keyframes trig-spin {
    to { transform: rotate(360deg); }
}
.trig-spinner-text {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* ===== Error ===== */
.trig-error {
    padding: 1rem;
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.25);
    border-radius: 0.5rem;
    color: var(--error, #ef4444);
    font-size: 0.875rem;
}

/* ===== Related Tools ===== */
.trig-related {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 0.75rem;
}
.trig-related-link {
    padding: 0.3rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    text-decoration: none;
    color: var(--text-secondary);
    transition: all 0.15s;
}
.trig-related-link:hover {
    border-color: var(--trig-tool);
    color: var(--trig-tool);
}

/* ===== Coterminal List ===== */
.trig-coterminal-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin: 0.75rem 0;
}
.trig-coterminal-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    padding: 0.5rem 0.75rem;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-primary);
}
.trig-coterminal-positive { border-left: 3px solid #16a34a; }
.trig-coterminal-negative { border-left: 3px solid #dc2626; }

/* ===== Educational Content Tables ===== */
.trig-ops-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
    margin: 0.75rem 0;
}
.trig-ops-table th,
.trig-ops-table td {
    padding: 0.5rem 0.75rem;
    text-align: left;
    border: 1px solid var(--border);
    color: var(--text-primary);
}
.trig-ops-table th {
    background: var(--bg-secondary);
    font-weight: 600;
    font-size: 0.75rem;
}
.trig-ops-table td {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
}

/* ===== Educational Cards ===== */
.trig-edu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.75rem;
    margin: 0.75rem 0;
}
.trig-edu-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 1rem;
}
.trig-edu-card h4 {
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--trig-tool);
    margin: 0 0 0.375rem;
}
.trig-edu-card p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* ===== Animated Unit Circle (educational) ===== */
.trig-unit-circle-animated {
    max-width: 280px;
    margin: 1rem auto;
}
.trig-unit-circle-animated .uc-ray {
    transform-origin: 140px 140px;
    animation: trig-rotate-ray 8s linear infinite;
}
@keyframes trig-rotate-ray {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}
.trig-unit-circle-animated .uc-dot {
    animation: trig-pulse-dot 2s ease-in-out infinite;
}
@keyframes trig-pulse-dot {
    0%, 100% { r: 5; opacity: 1; }
    50%      { r: 7; opacity: 0.7; }
}

/* ===== Animated Sine Wave (educational) ===== */
.trig-wave-animated {
    max-width: 100%;
    margin: 1rem 0;
}
.trig-wave-animated .wave-path {
    stroke-dasharray: 600;
    stroke-dashoffset: 600;
    animation: trig-draw-wave 2.5s ease forwards;
}
@keyframes trig-draw-wave {
    to { stroke-dashoffset: 0; }
}

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

@media (prefers-reduced-motion: reduce) {
    .trig-anim { opacity: 1; transform: none; transition: none; }
    .trig-unit-circle-animated .uc-ray { animation: none; }
    .trig-unit-circle-animated .uc-dot { animation: none; }
    .trig-wave-animated .wave-path { animation: none; stroke-dashoffset: 0; }
}

/* ===== Feature Highlight Cards ===== */
.trig-feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.75rem;
    margin: 1rem 0;
}
.trig-feature-card {
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    border-left: 3px solid var(--trig-tool);
    transition: transform 0.2s, box-shadow 0.2s;
}
.trig-feature-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.12);
}
.trig-feature-card h4 {
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--trig-tool);
    margin: 0 0 0.375rem;
}
.trig-feature-card p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}
[data-theme="dark"] .trig-feature-card {
    background: var(--bg-tertiary);
}

/* ===== Formula Highlight Box ===== */
.trig-formula-box {
    background: var(--bg-secondary);
    border-left: 3px solid var(--trig-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;
}
[data-theme="dark"] .trig-formula-box {
    background: var(--bg-tertiary);
}

/* ===== Worked Example Block ===== */
.trig-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: 2.2;
    overflow-x: auto;
    color: var(--text-primary);
}
[data-theme="dark"] .trig-worked-example {
    background: var(--bg-tertiary);
}

/* ===== Responsive ===== */
@media (max-width: 767px) {
    .trig-mode-btn { font-size: 0.5625rem; padding: 0.4rem 0.125rem; }
    .trig-output-tab { padding: 0.5rem 0.625rem; font-size: 0.75rem; }
    .trig-angle-values { grid-template-columns: repeat(2, 1fr); }
    .trig-coterminal-list { grid-template-columns: 1fr; }
    .trig-identity-grid { grid-template-columns: 1fr; }
}

/* ===== Dark mode overrides ===== */
[data-theme="dark"] .trig-identity-card {
    background: var(--bg-tertiary);
    border-color: var(--border);
}
[data-theme="dark"] .trig-sign-table th {
    background: rgba(124, 58, 237, 0.15);
}
[data-theme="dark"] .trig-angle-value-item {
    background: var(--bg-tertiary);
}
[data-theme="dark"] .trig-coterminal-item {
    background: var(--bg-tertiary);
}
[data-theme="dark"] .trig-example-chip {
    background: var(--bg-tertiary);
}
[data-theme="dark"] .trig-edu-card {
    background: var(--bg-tertiary);
}
[data-theme="dark"] .trig-ops-table th {
    background: var(--bg-tertiary);
}

/* ===== KaTeX overflow handling ===== */
.trig-step-math .katex-html,
.trig-identity-card-math .katex-html,
.trig-angle-value-math .katex-html,
.trig-preview .katex-html {
    overflow-x: auto;
    overflow-y: hidden;
    max-width: 100%;
}