/**
 * tool-base.css — Shared Base Styles for All Tool Interfaces
 *
 * Usage in each tool's own CSS:
 *   .t-{slug}-section { --tool-accent: #HEX; --tool-accent-rgb: R, G, B; }
 *
 * All layout, typography, button, input, status patterns live here.
 * Each tool's CSS file ONLY contains unique overrides + accent color.
 *
 * Prefixes used:
 *   .tool-*  — shared base classes (this file)
 */

/* ============================================================
   ACCENT VARIABLE DEFAULTS (overridden per-tool)
   ============================================================ */
:root {
    --tool-accent: var(--primary-color, #6366F1);
    --tool-accent-rgb: 99, 102, 241;

    /* Shared tool surface / border / typography tokens */
    --tool-surface: #F8FAFC;
    --tool-border: rgba(100, 116, 139, 0.14);
    --tool-radius-sm: 8px;
    --tool-radius-md: 12px;
    --tool-radius-lg: 16px;
    --tool-font-mono: 'Fira Code', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
    --tool-text-primary: #0F172A;
    --tool-text-muted: #64748B;
}

/* ============================================================
   SECTION WRAPPER
   ============================================================ */
.tool-section {
    padding: 48px 0 80px;
    background: #FFFFFF;
}

/* ============================================================
   SECTION HEADER
   ============================================================ */
.tool-section-header {
    text-align: center;
    margin-bottom: 36px;
}

.tool-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 18px;
    background: rgba(var(--tool-accent-rgb), 0.08);
    border: 1px solid rgba(var(--tool-accent-rgb), 0.2);
    border-radius: 50px;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--tool-accent);
    margin-bottom: 12px;
}

.tool-badge i {
    font-size: 0.875rem;
}

.tool-section-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.65;
}

/* ============================================================
   MAIN CARD
   ============================================================ */
.tool-card {
    background: #FFFFFF;
    border: 1px solid rgba(100, 116, 139, 0.14);
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

/* ============================================================
   OPTIONS BAR  (above textarea — settings, toggles, selects)
   ============================================================ */
.tool-options-bar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px 20px;
    padding: 12px 16px;
    background: #F8FAFC;
    border-bottom: 1px solid rgba(100, 116, 139, 0.12);
}

.tool-option-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.tool-option-group--toggle {
    gap: 10px;
}

.tool-option-label {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
}

/* Select */
.tool-select {
    padding: 6px 30px 6px 10px;
    font-size: 0.9375rem;
    font-weight: 500;
    font-family: inherit;
    color: var(--text-primary);
    background: #FFFFFF url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2364748b' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat right 10px center;
    border: 1px solid rgba(100, 116, 139, 0.22);
    border-radius: 8px;
    outline: none;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
    transition: border-color 0.15s;
}

.tool-select:focus {
    border-color: var(--tool-accent);
    box-shadow: 0 0 0 3px rgba(var(--tool-accent-rgb), 0.1);
}

/* Text input */
.tool-input {
    padding: 6px 12px;
    font-size: 0.9375rem;
    color: var(--text-primary);
    background: #FFFFFF;
    border: 1px solid rgba(100, 116, 139, 0.22);
    border-radius: 8px;
    outline: none;
    transition: border-color 0.15s;
}

.tool-input:focus {
    border-color: var(--tool-accent);
    box-shadow: 0 0 0 3px rgba(var(--tool-accent-rgb), 0.1);
}

.tool-input::placeholder {
    color: #94a3b8;
}

/* Toggle */
.tool-toggle {
    display: flex;
    align-items: center;
    gap: 7px;
    cursor: pointer;
    user-select: none;
}

.tool-toggle input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.tool-toggle-track {
    position: relative;
    width: 36px;
    height: 20px;
    background: rgba(100, 116, 139, 0.25);
    border-radius: 20px;
    transition: background 0.2s;
    flex-shrink: 0;
}

.tool-toggle-thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    transition: left 0.2s;
}

.tool-toggle input:checked~.tool-toggle-track {
    background: var(--tool-accent);
}

.tool-toggle input:checked~.tool-toggle-track .tool-toggle-thumb {
    left: 18px;
}

.tool-toggle-text {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
}

/* ============================================================
   IO SPLIT LAYOUT  (Input | Output)
   ============================================================ */
.tool-io-wrap {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: stretch;
    min-height: 340px;
}

/* Single-panel variant */
.tool-io-wrap--single {
    display: block;
}

.tool-io-panel {
    display: flex;
    flex-direction: column;
    border: 1px solid rgba(100, 116, 139, 0.14);
    border-radius: 12px;
    overflow: hidden;
    background: #FFFFFF;
}

.tool-io-wrap--single .tool-io-panel {
    border-radius: 0;
    border: none;
    border-bottom: 1px solid rgba(100, 116, 139, 0.12);
}

/* Panel header */
.tool-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: #F8FAFC;
    border-bottom: 1px solid rgba(100, 116, 139, 0.12);
    flex-shrink: 0;
}

.tool-panel-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-light);
}

.tool-panel-actions {
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Icon-only small button inside panel header */
.tool-icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 6px;
    border: 1px solid rgba(100, 116, 139, 0.18);
    background: #FFFFFF;
    color: var(--text-light);
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
    font-size: 1rem;
}

.tool-icon-btn:hover {
    background: rgba(var(--tool-accent-rgb), 0.07);
    border-color: rgba(var(--tool-accent-rgb), 0.3);
    color: var(--tool-accent);
}

.tool-icon-btn:active {
    transform: scale(0.92);
}

/* Textarea */
.tool-textarea {
    flex: 1;
    display: block;
    width: 100%;
    min-height: 300px;
    padding: 16px 18px;
    font-family: 'Fira Code', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-primary);
    background: #FFFFFF;
    border: none;
    outline: none;
    resize: vertical;
    box-sizing: border-box;
    tab-size: 2;
}

.tool-textarea::placeholder {
    color: #94a3b8;
    font-family: inherit;
}

.tool-textarea[readonly] {
    background: #FAFAFA;
    color: var(--text-secondary);
    cursor: default;
}

/* Panel footer — char count, hint text */
.tool-panel-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 14px;
    background: #F8FAFC;
    border-top: 1px solid rgba(100, 116, 139, 0.1);
    flex-shrink: 0;
}

.tool-panel-count {
    font-size: 0.8125rem;
    color: var(--text-light);
    font-weight: 500;
}

/* Divider between input and output panels */
.tool-io-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    flex-shrink: 0;
}

.tool-io-divider i {
    font-size: 1.2rem;
    color: #cbd5e1;
}

/* ============================================================
   ACTION BAR  (below IO wrap)
   ============================================================ */
.tool-action-bar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    padding: 16px 20px 20px;
    border-top: 1px solid rgba(100, 116, 139, 0.1);
    margin-top: 0;
}

.tool-action-bar-right {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
    flex-wrap: wrap;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.tool-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 20px;
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: inherit;
    border-radius: 10px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, color 0.15s, opacity 0.15s, transform 0.1s;
    white-space: nowrap;
    line-height: 1;
    text-decoration: none;
    vertical-align: middle;
}

.tool-btn i {
    font-size: 0.9375rem;
    flex-shrink: 0;
}

.tool-btn:disabled {
    opacity: 0.42;
    cursor: not-allowed;
    pointer-events: none;
}

.tool-btn:active:not(:disabled) {
    transform: scale(0.97);
}

/* Primary */
.tool-btn--primary {
    background: var(--tool-accent);
    color: #FFFFFF;
    border-color: var(--tool-accent);
    box-shadow: 0 2px 8px rgba(var(--tool-accent-rgb), 0.3);
}

.tool-btn--primary:hover:not(:disabled) {
    filter: brightness(1.08);
    box-shadow: 0 4px 14px rgba(var(--tool-accent-rgb), 0.4);
}

/* Secondary — outlined */
.tool-btn--secondary {
    background: rgba(var(--tool-accent-rgb), 0.07);
    color: var(--tool-accent);
    border-color: rgba(var(--tool-accent-rgb), 0.28);
}

.tool-btn--secondary:hover:not(:disabled) {
    background: rgba(var(--tool-accent-rgb), 0.13);
    border-color: rgba(var(--tool-accent-rgb), 0.45);
}

/* Ghost — neutral */
.tool-btn--ghost {
    background: #FFFFFF;
    color: var(--text-secondary);
    border-color: rgba(100, 116, 139, 0.25);
}

.tool-btn--ghost:hover:not(:disabled) {
    background: #F8FAFC;
    border-color: rgba(100, 116, 139, 0.4);
    color: var(--text-primary);
}

/* Danger */
.tool-btn--danger {
    background: rgba(239, 68, 68, 0.07);
    color: #dc2626;
    border-color: rgba(239, 68, 68, 0.25);
}

.tool-btn--danger:hover:not(:disabled) {
    background: rgba(239, 68, 68, 0.13);
}

/* Small size modifier */
.tool-btn--sm {
    padding: 6px 14px;
    font-size: 0.875rem;
    border-radius: 8px;
}

/* Loading state */
.tool-btn--loading {
    pointer-events: none;
    opacity: 0.8;
}

/* ============================================================
   SPINNER
   ============================================================ */
.tool-spinner {
    display: inline-block;
    width: 15px;
    height: 15px;
    border: 2px solid rgba(var(--tool-accent-rgb), 0.2);
    border-top-color: var(--tool-accent);
    border-radius: 50%;
    animation: tool-spin 0.65s linear infinite;
    flex-shrink: 0;
    vertical-align: middle;
}

.tool-btn--primary .tool-spinner {
    border-color: rgba(255, 255, 255, 0.3);
    border-top-color: #FFFFFF;
}

@keyframes tool-spin {
    to {
        transform: rotate(360deg);
    }
}

/* ============================================================
   STATUS MESSAGE
   ============================================================ */
.tool-status {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.5;
    margin-top: 12px;
    border: 1px solid transparent;
}

.tool-status i {
    font-size: 1rem;
    flex-shrink: 0;
    margin-top: 1px;
}

.tool-status:empty,
.tool-status[hidden] {
    display: none;
}

.tool-status--success {
    background: rgba(16, 185, 129, 0.08);
    border-color: rgba(16, 185, 129, 0.22);
    color: #065f46;
}

.tool-status--success i {
    color: #10b981;
}

.tool-status--error {
    background: rgba(239, 68, 68, 0.07);
    border-color: rgba(239, 68, 68, 0.22);
    color: #991b1b;
}

.tool-status--error i {
    color: #ef4444;
}

.tool-status--info {
    background: rgba(var(--tool-accent-rgb), 0.07);
    border-color: rgba(var(--tool-accent-rgb), 0.22);
    color: var(--text-primary);
}

.tool-status--info i {
    color: var(--tool-accent);
}

.tool-status--warning {
    background: rgba(245, 158, 11, 0.08);
    border-color: rgba(245, 158, 11, 0.25);
    color: #78350f;
}

.tool-status--warning i {
    color: #f59e0b;
}

/* ============================================================
   STATS GRID  (word-counter style stat cards)
   ============================================================ */
.tool-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
    margin-top: 20px;
}

.tool-stat-card {
    background: #F8FAFC;
    border: 1px solid rgba(100, 116, 139, 0.14);
    border-radius: 12px;
    padding: 14px 16px;
    text-align: center;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.tool-stat-card:hover {
    border-color: rgba(var(--tool-accent-rgb), 0.3);
    box-shadow: 0 2px 8px rgba(var(--tool-accent-rgb), 0.08);
}

.tool-stat-value {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--tool-accent);
    line-height: 1;
    margin-bottom: 4px;
}

.tool-stat-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-light);
}

/* ============================================================
   COPY FEEDBACK — transient "Copied!" tooltip on icon button
   ============================================================ */
.tool-icon-btn[data-copied="true"] {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.3);
    color: #10b981;
}

/* ============================================================
   EMPTY STATE
   ============================================================ */
.tool-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 40px 20px;
    color: #94a3b8;
}

.tool-empty-state i {
    font-size: 2rem;
    opacity: 0.5;
}

.tool-empty-state p {
    font-size: 1rem;
    text-align: center;
    max-width: 240px;
    margin: 0;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
    .tool-io-wrap {
        grid-template-columns: 1fr;
    }

    .tool-io-divider {
        width: 100%;
        height: 32px;
        transform: rotate(90deg);
    }

    .tool-textarea {
        min-height: 220px;
    }

    .tool-action-bar {
        gap: 8px;
    }

    .tool-action-bar-right {
        margin-left: 0;
    }

    .tool-btn {
        padding: 8px 16px;
        font-size: 0.9375rem;
    }

    .tool-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .tool-section {
        padding: 32px 0 60px;
    }

    .tool-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .tool-options-bar {
        gap: 10px 14px;
    }
}

/* ============================================================
   ALIASES — alternate class names used across tool EJS files
   ============================================================ */

/* tool-io-pane → same as tool-io-panel */
.tool-io-pane {
    display: flex;
    flex-direction: column;
    border: 1px solid rgba(100, 116, 139, 0.14);
    border-radius: 12px;
    overflow: hidden;
    background: #FFFFFF;
}

/* tool-io-header → same as tool-panel-header */
.tool-io-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: #F8FAFC;
    border-bottom: 1px solid rgba(100, 116, 139, 0.12);
    flex-shrink: 0;
}

/* tool-io-label → same as tool-panel-label */
.tool-io-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-light);
}

/* tool-io-actions → same as tool-panel-actions */
.tool-io-actions {
    display: flex;
    align-items: center;
    gap: 6px;
}

/* tool-action-btn → ghost-style small button */
.tool-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 8px;
    border: 1px solid rgba(100, 116, 139, 0.25);
    background: #FFFFFF;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
    white-space: nowrap;
    line-height: 1;
}

.tool-action-btn:hover {
    background: #F8FAFC;
    border-color: rgba(100, 116, 139, 0.4);
    color: var(--text-primary);
}

.tool-action-btn:active {
    transform: scale(0.96);
}

/* tool-primary-btn → accent-filled button */
.tool-primary-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 22px;
    font-size: 0.9375rem;
    font-weight: 700;
    border-radius: 10px;
    border: 1px solid transparent;
    background: var(--tool-accent);
    color: #FFFFFF;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(var(--tool-accent-rgb), 0.3);
    transition: filter 0.15s, box-shadow 0.15s, transform 0.1s;
    white-space: nowrap;
    line-height: 1;
}

.tool-primary-btn:hover {
    filter: brightness(1.08);
    box-shadow: 0 4px 14px rgba(var(--tool-accent-rgb), 0.4);
}

.tool-primary-btn:active {
    transform: scale(0.97);
}

.tool-primary-btn i {
    font-size: 0.9375rem;
}

/* Button-based toggle switch (role="switch", data-on="true/false") */
button.tool-toggle {
    position: relative;
    width: 44px;
    height: 24px;
    border-radius: 24px;
    border: 1px solid rgba(100, 116, 139, 0.25);
    background: rgba(100, 116, 139, 0.2);
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
    flex-shrink: 0;
    padding: 0;
}

button.tool-toggle[data-on="true"],
button.tool-toggle[aria-checked="true"] {
    background: var(--tool-accent);
    border-color: var(--tool-accent);
}

button.tool-toggle .tool-toggle-thumb {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    transition: left 0.2s;
}

button.tool-toggle[data-on="true"] .tool-toggle-thumb,
button.tool-toggle[aria-checked="true"] .tool-toggle-thumb {
    left: calc(100% - 19px);
}

/* BEM variant: tool-toggle__track / tool-toggle__thumb */
.tool-toggle__track {
    position: relative;
    display: inline-block;
    width: 36px;
    height: 20px;
    background: rgba(100, 116, 139, 0.25);
    border-radius: 20px;
    transition: background 0.2s;
    flex-shrink: 0;
}

.tool-toggle__thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    transition: left 0.2s;
}

.tool-toggle input:checked~.tool-toggle__track {
    background: var(--tool-accent);
}

.tool-toggle input:checked~.tool-toggle__track .tool-toggle__thumb {
    left: 18px;
}

/* Range input */
.tool-range {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    background: rgba(var(--tool-accent-rgb), 0.2);
    border-radius: 4px;
    outline: none;
    cursor: pointer;
    transition: background 0.15s;
}

.tool-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--tool-accent);
    border: 2px solid #fff;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    transition: transform 0.15s;
}

.tool-range::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--tool-accent);
    border: 2px solid #fff;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
    cursor: pointer;
}

.tool-range::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

/* Outline button variant */
.tool-btn--outline {
    background: transparent;
    color: var(--tool-accent);
    border-color: rgba(var(--tool-accent-rgb), 0.45);
}

.tool-btn--outline:hover:not(:disabled) {
    background: rgba(var(--tool-accent-rgb), 0.07);
    border-color: var(--tool-accent);
}

/* Form field label */
.tool-label {
    display: block;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

/* Output-only textarea */
.tool-output-ta {
    flex: 1;
    display: block;
    width: 100%;
    min-height: 200px;
    padding: 16px 18px;
    font-family: 'Fira Code', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-secondary);
    background: #FAFAFA;
    border: 1px solid rgba(100, 116, 139, 0.14);
    border-radius: 12px;
    outline: none;
    resize: vertical;
    box-sizing: border-box;
    cursor: default;
}