/* ==========================================================================
   PiTools Regex Tester & Visual Debugger Stylesheet
   ========================================================================== */

:root {
    --regex-card-bg: var(--card-bg, #0f172a);
    --regex-card-border: var(--card-border, #1e293b);
    --regex-editor-bg: #090d16;
    --regex-text-main: var(--text-main, #f8fafc);
    --regex-text-muted: var(--text-muted, #94a3b8);
    --regex-btn-bg: rgba(255, 255, 255, 0.05);
    --regex-btn-border: #1e293b;
    --regex-header-bg: rgba(0, 0, 0, 0.2);
    --regex-match-val-bg: rgba(0, 0, 0, 0.3);
}

[data-theme="light"] {
    --regex-card-bg: #ffffff;
    --regex-card-border: #e2e8f0;
    --regex-editor-bg: #f8fafc;
    --regex-text-main: #0f172a;
    --regex-text-muted: #64748b;
    --regex-btn-bg: #f1f5f9;
    --regex-btn-border: #e2e8f0;
    --regex-header-bg: #f1f5f9;
    --regex-match-val-bg: #e2e8f0;
}

.regex-studio-container {
    max-width: 1680px;
    margin: 0 auto;
    padding: 0.5rem 0.5rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* Hero Header */
.regex-header-hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1.25rem;
    background: var(--regex-card-bg);
    border: 1px solid var(--regex-card-border);
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
    flex-wrap: wrap;
    gap: 0.75rem;
}

.regex-hero-left {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.regex-hero-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: linear-gradient(135deg, #ec4899, #8b5cf6);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 900;
    color: #ffffff;
    font-family: monospace;
    box-shadow: 0 4px 12px rgba(236, 72, 153, 0.35);
    flex-shrink: 0;
}

.regex-hero-title {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--regex-text-main);
    margin: 0 0 0.15rem 0;
    letter-spacing: -0.3px;
}

.regex-hero-sub {
    font-size: 0.82rem;
    color: var(--regex-text-muted);
    margin: 0;
}

.regex-hero-badges {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.regex-badge {
    padding: 0.25rem 0.6rem;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 700;
    background: rgba(236, 72, 153, 0.12);
    color: #ec4899;
    border: 1px solid rgba(236, 72, 153, 0.25);
}

/* Pattern Card */
.regex-pattern-card {
    background: var(--regex-card-bg);
    border: 1px solid var(--regex-card-border);
    border-radius: 12px;
    padding: 0.85rem;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
}

.regex-input-row {
    display: flex;
    align-items: center;
    background: var(--regex-editor-bg);
    border: 1px solid var(--regex-card-border);
    border-radius: 8px;
    padding: 0.35rem 0.65rem;
    gap: 0.4rem;
}

.regex-delimiter {
    font-size: 1.2rem;
    font-weight: 800;
    color: #ec4899;
    font-family: monospace;
    user-select: none;
}

.regex-pattern-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    font-family: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--regex-text-main);
}

.regex-flags-label {
    font-family: monospace;
    font-size: 0.9rem;
    font-weight: 700;
    color: #a855f7;
    user-select: none;
}

/* Options & Flags Row */
.regex-options-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.regex-flags-group {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    flex-wrap: wrap;
}

.regex-flags-title {
    font-size: 0.76rem;
    font-weight: 800;
    color: var(--regex-text-muted);
    text-transform: uppercase;
}

.regex-flag-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
    background: var(--regex-btn-bg);
    border: 1px solid var(--regex-btn-border);
    font-size: 0.74rem;
    color: var(--regex-text-main);
    cursor: pointer;
    user-select: none;
    transition: all 0.12s ease;
}

.regex-flag-pill input {
    accent-color: #ec4899;
    cursor: pointer;
}

.regex-flag-pill:hover {
    border-color: #ec4899;
}

/* Dropdown */
.regex-dropdown-wrapper {
    position: relative;
    display: inline-block;
}

.regex-dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 4px;
    background: var(--regex-card-bg);
    border: 1px solid var(--regex-card-border);
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
    padding: 4px;
    min-width: 210px;
    z-index: 100;
    display: none;
    flex-direction: column;
    gap: 2px;
}

.regex-dropdown-wrapper:hover .regex-dropdown-menu,
.regex-dropdown-menu.show {
    display: flex;
}

.regex-dropdown-item {
    background: transparent;
    border: none;
    text-align: left;
    padding: 6px 10px;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--regex-text-main);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.1s ease;
}

.regex-dropdown-item:hover {
    background: rgba(236, 72, 153, 0.15);
    color: #ec4899;
}

.regex-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.35rem 0.75rem;
    font-size: 0.78rem;
    font-weight: 700;
    border-radius: 6px;
    border: 1px solid var(--regex-btn-border);
    background: var(--regex-btn-bg);
    color: var(--regex-text-main);
    cursor: pointer;
    transition: all 0.15s ease;
}

.regex-btn:hover {
    border-color: #ec4899;
    color: #ec4899;
}

.regex-btn.btn-primary {
    background: linear-gradient(135deg, #ec4899, #8b5cf6);
    color: #ffffff;
    border-color: transparent;
}

.regex-btn.btn-small {
    padding: 0.2rem 0.5rem;
    font-size: 0.72rem;
}

/* Error Banner */
.regex-error-banner {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0.85rem;
    border-radius: 8px;
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.35);
    color: #ef4444;
}

.regex-error-icon {
    font-size: 1.25rem;
}

.regex-error-body {
    flex: 1;
}

.regex-error-title {
    font-size: 0.82rem;
    font-weight: 800;
}

.regex-error-msg {
    font-size: 0.76rem;
    font-family: monospace;
    color: #ef4444;
}

/* Workspace Grid */
.regex-workspace-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    min-height: 480px;
}

.regex-card {
    background: var(--regex-card-bg);
    border: 1px solid var(--regex-card-border);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
}

.regex-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.4rem 0.65rem;
    background: var(--regex-header-bg);
    border-bottom: 1px solid var(--regex-card-border);
    gap: 0.5rem;
}

.regex-card-title {
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--regex-text-main);
}

.regex-card-actions {
    display: flex;
    gap: 0.3rem;
}

.regex-card-btn {
    padding: 0.2rem 0.55rem;
    font-size: 0.72rem;
    font-weight: 700;
    border-radius: 4px;
    border: 1px solid var(--regex-btn-border);
    background: var(--regex-btn-bg);
    color: var(--regex-text-main);
    cursor: pointer;
}

.regex-card-btn:hover {
    border-color: #ec4899;
    color: #ec4899;
}

/* Dual Layer Live Highlighter Editor */
.regex-editor-container {
    position: relative;
    flex: 1;
    min-height: 320px;
    max-height: 520px;
    overflow: hidden;
    background: var(--regex-editor-bg);
}

.regex-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    pointer-events: none;
    z-index: 1;
}

.regex-highlights {
    padding: 0.75rem;
    font-family: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    font-size: 0.85rem;
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-word;
    color: transparent;
}

.regex-test-textarea {
    position: relative;
    z-index: 2;
    width: 100%;
    height: 100%;
    min-height: 320px;
    background: transparent;
    border: none;
    outline: none;
    resize: none;
    padding: 0.75rem;
    font-family: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--regex-text-main);
    caret-color: #ec4899;
}

/* Match & Capture Highlights */
mark.regex-match-mark {
    background: rgba(236, 72, 153, 0.35);
    border-radius: 3px;
    box-shadow: 0 0 0 1px rgba(236, 72, 153, 0.6);
    color: transparent;
}

mark.regex-group-mark-1 {
    background: rgba(59, 130, 246, 0.45);
    box-shadow: 0 0 0 1px rgba(59, 130, 246, 0.8);
}

mark.regex-group-mark-2 {
    background: rgba(16, 185, 129, 0.45);
    box-shadow: 0 0 0 1px rgba(16, 185, 129, 0.8);
}

mark.regex-group-mark-3 {
    background: rgba(245, 158, 11, 0.45);
    box-shadow: 0 0 0 1px rgba(245, 158, 11, 0.8);
}

/* Replace Box */
.regex-replace-box {
    padding: 0.5rem 0.65rem;
    background: var(--regex-header-bg);
    border-top: 1px solid var(--regex-card-border);
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.regex-replace-header {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-wrap: wrap;
    color: var(--regex-text-main);
}

.regex-replace-input {
    flex: 1;
    min-width: 180px;
    padding: 0.25rem 0.5rem;
    font-size: 0.78rem;
    border-radius: 4px;
    border: 1px solid var(--regex-btn-border);
    background: var(--regex-card-bg);
    color: var(--regex-text-main);
    outline: none;
    font-family: monospace;
}

.regex-replace-result {
    padding: 0.4rem 0.6rem;
    background: var(--regex-editor-bg);
    border-radius: 4px;
    border: 1px dashed var(--regex-card-border);
    font-family: monospace;
    font-size: 0.8rem;
    color: #10b981;
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 120px;
    overflow-y: auto;
}

/* Tabs Header */
.regex-tabs {
    display: flex;
    gap: 3px;
}

.regex-tab-btn {
    background: transparent;
    border: none;
    outline: none;
    font-size: 0.74rem;
    font-weight: 700;
    color: var(--regex-text-muted);
    padding: 3px 8px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.12s ease;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.regex-tab-btn.active {
    background: #ec4899;
    color: #ffffff;
}

.regex-count-badge {
    padding: 1px 5px;
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.15);
    font-size: 0.65rem;
}

/* Inspector Body */
.regex-inspector-body {
    flex: 1;
    min-height: 380px;
    max-height: 520px;
    overflow-y: auto;
    padding: 0.65rem;
    background: var(--regex-editor-bg);
}

.regex-matches-list,
.regex-explain-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.regex-match-item {
    background: var(--regex-card-bg);
    border: 1px solid var(--regex-card-border);
    border-radius: 6px;
    padding: 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.regex-match-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.74rem;
    font-weight: 800;
}

.regex-match-idx {
    color: #ec4899;
}

.regex-match-pos {
    color: var(--regex-text-muted);
    font-family: monospace;
    font-size: 0.7rem;
}

.regex-match-val {
    font-family: 'JetBrains Mono', Consolas, monospace;
    font-size: 0.82rem;
    color: var(--regex-text-main);
    background: var(--regex-match-val-bg);
    padding: 3px 6px;
    border-radius: 4px;
    word-break: break-all;
}

.regex-groups-grid {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-top: 2px;
    padding-left: 0.5rem;
    border-left: 2px solid rgba(236, 72, 153, 0.4);
}

.regex-group-row {
    font-size: 0.72rem;
    font-family: monospace;
    color: var(--regex-text-muted);
    display: flex;
    gap: 0.4rem;
}

.regex-group-label {
    font-weight: 700;
    color: #0284c7;
}

/* Explanation Items */
.regex-token-item {
    background: var(--regex-card-bg);
    border-left: 3px solid #8b5cf6;
    border-top: 1px solid var(--regex-card-border);
    border-right: 1px solid var(--regex-card-border);
    border-bottom: 1px solid var(--regex-card-border);
    padding: 0.45rem 0.65rem;
    border-radius: 0 6px 6px 0;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.regex-token-name {
    font-size: 0.78rem;
    font-weight: 800;
    color: var(--regex-text-main);
    display: flex;
    align-items: center;
    gap: 6px;
}

.regex-token-code {
    font-family: monospace;
    background: var(--regex-match-val-bg);
    padding: 1px 4px;
    border-radius: 3px;
    color: #ec4899;
}

.regex-token-desc {
    font-size: 0.74rem;
    color: var(--regex-text-muted);
    line-height: 1.4;
}

/* Cheatsheet Grid */
.regex-cheatsheet-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.4rem;
}

.regex-cheat-item {
    background: var(--regex-card-bg);
    border: 1px solid var(--regex-card-border);
    border-radius: 6px;
    padding: 0.35rem 0.55rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.74rem;
}

.regex-cheat-item code {
    font-family: monospace;
    color: #ec4899;
    font-weight: 800;
    background: var(--regex-match-val-bg);
    padding: 1px 5px;
    border-radius: 3px;
    min-width: 32px;
    text-align: center;
}

.regex-cheat-item span {
    color: var(--regex-text-muted);
}

.regex-empty-msg {
    color: var(--regex-text-muted);
    font-style: italic;
    text-align: center;
    padding: 2rem;
    font-size: 0.8rem;
}

/* Statusbar */
.regex-statusbar {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.35rem 0.85rem;
    background: var(--regex-card-bg);
    border: 1px solid var(--regex-card-border);
    border-radius: 6px;
    font-size: 0.74rem;
    color: var(--regex-text-muted);
    flex-wrap: wrap;
}

.regex-status-item {
    display: flex;
    gap: 0.25rem;
}

.regex-status-label {
    font-weight: 700;
}

.regex-status-right {
    margin-left: auto;
    font-weight: 700;
    color: #ec4899;
}

/* SEO Info Section */
.regex-info-section {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1rem;
}

.regex-info-card {
    background: var(--regex-card-bg);
    border: 1px solid var(--regex-card-border);
    border-radius: 10px;
    padding: 1rem 1.25rem;
}

.regex-info-card h2,
.regex-info-card h3 {
    color: var(--regex-text-main);
    margin: 0 0 0.45rem 0;
    font-size: 1rem;
}

.regex-info-card p,
.regex-info-card ul {
    color: var(--regex-text-muted);
    font-size: 0.82rem;
    line-height: 1.6;
    margin: 0;
}

.regex-info-card ul {
    padding-left: 1.25rem;
}

.regex-info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.regex-guide-link {
    color: #ec4899;
    font-weight: 700;
    text-decoration: none;
    font-size: 0.82rem;
}

.regex-guide-link:hover {
    text-decoration: underline;
}

/* Responsive Mobile Rules */
@media (max-width: 900px) {
    .regex-workspace-grid {
        grid-template-columns: 1fr;
    }

    .regex-info-grid {
        grid-template-columns: 1fr;
    }

    .regex-cheatsheet-grid {
        grid-template-columns: 1fr;
    }

    .regex-editor-container,
    .regex-inspector-body {
        min-height: 280px;
        max-height: 380px;
    }

    .regex-test-textarea {
        min-height: 280px;
    }
}