/* Exponent Calculator - Component Styles */

:root {
    --ec-tool: #d97706;
    --ec-tool-dark: #b45309;
    --ec-gradient: linear-gradient(135deg, #d97706 0%, #f59e0b 100%);
    --ec-light: #fef3c7;
}
[data-theme="dark"] {
    --ec-light: rgba(217, 119, 6, 0.15);
}

/* ===== Mode Toggle ===== */
.ec-mode-toggle {
    display: flex;
    border: 1.5px solid var(--border);
    border-radius: 0.5rem;
    overflow: hidden;
    margin-bottom: 1rem;
}
.ec-mode-btn {
    flex: 1;
    padding: 0.5rem 0.25rem;
    font-weight: 600;
    font-size: 0.65rem;
    border: none;
    cursor: pointer;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    transition: all 0.15s;
    font-family: var(--font-sans);
    text-align: center;
}
.ec-mode-btn.active {
    background: var(--ec-gradient);
    color: #fff;
}
.ec-mode-btn:hover:not(.active) {
    background: var(--bg-tertiary);
}
[data-theme="dark"] .ec-mode-btn { background: var(--bg-tertiary); }
[data-theme="dark"] .ec-mode-btn.active { background: var(--ec-gradient); color: #fff; }

/* ===== Input Groups ===== */
.ec-input-row {
    display: flex;
    gap: 0.5rem;
    align-items: flex-end;
    margin-bottom: 0.5rem;
}
.ec-input-group {
    flex: 1;
    min-width: 0;
}
.ec-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;
}
.ec-input {
    width: 100%;
    padding: 0.5rem;
    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);
    text-align: center;
    transition: border-color 0.15s;
}
.ec-input:focus {
    outline: none;
    border-color: var(--ec-tool);
    box-shadow: 0 0 0 2px rgba(217, 119, 6, 0.1);
}

/* ===== Rule Selector ===== */
.ec-rule-select {
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-size: 0.8125rem;
    border: 1.5px solid var(--border);
    border-radius: 0.375rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    cursor: pointer;
}
.ec-rule-select:focus {
    outline: none;
    border-color: var(--ec-tool);
}

/* ===== Live Preview ===== */
.ec-preview {
    min-height: 2.5rem;
    padding: 0.5rem 0.75rem;
    border: 1.5px dashed var(--border);
    border-radius: 0.5rem;
    background: var(--bg-secondary);
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-x: auto;
}
.ec-preview .katex { font-size: 1em; }

/* ===== Output Tabs ===== */
.ec-output-tabs {
    display: flex;
    border-bottom: 1.5px solid var(--border);
    background: var(--bg-secondary);
    border-radius: 0.75rem 0.75rem 0 0;
    overflow: hidden;
}
.ec-output-tab {
    flex: 1;
    padding: 0.625rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    background: transparent;
    color: var(--text-secondary);
    transition: all 0.15s;
    font-family: var(--font-sans);
    text-align: center;
    position: relative;
}
.ec-output-tab.active {
    color: var(--ec-tool);
    background: var(--bg-primary);
}
.ec-output-tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--ec-tool);
}
.ec-output-tab:hover:not(.active) {
    background: var(--bg-tertiary);
}

/* ===== Panels ===== */
.ec-panel { display: none; }
.ec-panel.active { display: block; }

/* ===== Mode Forms ===== */
.ec-mode-form { display: none; }
.ec-mode-form.active { display: block; }

/* ===== Step-by-Step ===== */
.ec-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(--ec-tool);
    transition: background 0.15s;
}
.ec-step:hover { background: var(--bg-tertiary); }
.ec-step-number {
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    background: var(--ec-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;
}
.ec-step-content { flex: 1; min-width: 0; }
.ec-step-desc {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.375rem;
}
.ec-step-math {
    overflow-x: auto;
    padding: 0.25rem 0;
}
.ec-step-math .katex { font-size: 0.9em; }
.ec-step-math .katex-display { margin: 0; overflow-x: auto; overflow-y: hidden; }

/* ===== Rule Badge ===== */
.ec-rule-badge {
    display: inline-block;
    background: var(--ec-gradient);
    color: #fff;
    padding: 0.2rem 0.625rem;
    border-radius: 0.75rem;
    font-size: 0.6875rem;
    font-weight: 600;
}

/* ===== Law Card (All Laws mode) ===== */
.ec-law-card {
    padding: 0.75rem;
    margin: 0.5rem 0;
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    border-left: 3px solid var(--ec-tool);
}
.ec-law-card h4 {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.375rem;
}
.ec-law-formula {
    padding: 0.375rem 0.5rem;
    background: var(--ec-light);
    border-radius: 0.375rem;
    margin-bottom: 0.375rem;
    overflow-x: auto;
}
.ec-law-formula .katex { font-size: 0.85em; }
.ec-law-example {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* ===== Quick Examples ===== */
.ec-examples {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}
.ec-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-mono);
}
.ec-example-chip:hover {
    background: var(--ec-light);
    color: var(--ec-tool);
    border-color: var(--ec-tool);
}

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

.ec-callout {
    display: flex;
    gap: 0.75rem;
    padding: 1rem;
    border-radius: 0.5rem;
    margin: 1rem 0;
}
.ec-callout-icon { font-size: 1.25rem; flex-shrink: 0; }
.ec-callout-text { font-size: 0.8125rem; line-height: 1.6; color: var(--text-secondary); }
.ec-callout-insight { background: #fffbeb; border-left: 3px solid #d97706; }
.ec-callout-tip { background: #ecfdf5; border-left: 3px solid #10b981; }
[data-theme="dark"] .ec-callout-insight { background: rgba(217, 119, 6, 0.1); }
[data-theme="dark"] .ec-callout-tip { background: rgba(16, 185, 129, 0.1); }

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

@media (prefers-reduced-motion: reduce) {
    .ec-anim { opacity: 1; transform: none; transition: none; }
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
    .ec-input-row { flex-direction: column; gap: 0.375rem; }
    .ec-laws-grid { grid-template-columns: 1fr; }
}