/* ============================================
   REGEX TESTER - Tool-Specific Styles
   ============================================ */

/* Visually Hidden (for screen readers) */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Calculator Layout */
.calculator-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 24px;
    min-height: calc(100vh - 300px);
}

.calculator-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
}

.panel-header {
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-header h2 {
    font-size: 1.5rem;
    margin-bottom: 4px;
}

.panel-header p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* Engine Switcher */
.engine-switch {
    display: flex;
    background: var(--bg-secondary);
    border-radius: 6px;
    padding: 2px;
    border: 1px solid var(--border-color);
}

.engine-btn {
    padding: 6px 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
}

.engine-btn.active {
    background: var(--accent-engineering);
    color: var(--bg-primary);
    font-weight: 600;
}

.engine-btn.loading {
    cursor: wait;
    opacity: 0.7;
}

.engine-btn:focus {
    outline: 2px solid var(--accent-engineering);
    outline-offset: 2px;
}

/* Regex Input Bar */
.regex-input-group {
    display: flex;
    gap: 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 20px;
    align-items: center;
    flex-wrap: wrap;
}

.regex-slash {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.25rem;
    color: var(--text-muted);
    font-weight: 600;
}

.regex-pattern {
    flex: 1;
    background: transparent;
    border: none;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.125rem;
    color: var(--accent-engineering);
    outline: none;
    min-width: 200px;
}

.regex-pattern::placeholder {
    color: var(--text-muted);
    opacity: 0.5;
}

.flags-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.flags-input {
    width: 60px;
    background: transparent;
    border: none;
    border-bottom: 1px solid transparent;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    color: var(--text-secondary);
    outline: none;
    transition: all 0.2s;
}

.flags-input:focus {
    border-bottom-color: var(--accent-engineering);
    color: var(--text-primary);
}

/* Copy Icon Button (for regex pattern) */
.copy-icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
    flex-shrink: 0;
}

.copy-icon-btn svg {
    width: 16px;
    height: 16px;
}

.copy-icon-btn:hover {
    color: var(--text-primary);
    background: var(--bg-card);
}

.copy-icon-btn:focus {
    outline: 2px solid var(--accent-engineering);
    outline-offset: 2px;
}

.copy-icon-btn.copied {
    color: var(--accent-success);
}

.copy-icon-btn.copied svg {
    animation: checkmark 0.3s ease-in-out;
}

/* Copy Dropdown */
.copy-dropdown {
    position: relative;
}

.copy-icon-btn .dropdown-arrow {
    width: 10px;
    height: 10px;
    margin-left: 2px;
    transition: transform 0.2s;
}

.copy-icon-btn[aria-expanded="true"] .dropdown-arrow {
    transform: rotate(180deg);
}

.copy-dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    min-width: 180px;
    z-index: 100;
    display: none;
    overflow: hidden;
}

.copy-dropdown-menu.active {
    display: block;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 10px 14px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.8125rem;
    text-align: left;
    cursor: pointer;
    transition: background 0.15s;
}

.dropdown-item:hover,
.dropdown-item:focus {
    background: var(--bg-secondary);
    outline: none;
}

.dropdown-item:first-child {
    border-bottom: 1px solid var(--border-color);
}

/* Test Area */
.test-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.input-label {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
}

/* Copy Link Button (for matches) */
.copy-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 4px;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.75rem;
    font-weight: 500;
    transition: all 0.2s;
}

.copy-link-btn svg {
    width: 14px;
    height: 14px;
}

.copy-link-btn:hover {
    color: var(--accent-engineering);
    background: var(--bg-secondary);
}

.copy-link-btn:focus {
    outline: 2px solid var(--accent-engineering);
    outline-offset: 2px;
}

.copy-link-btn.copied {
    color: var(--accent-success);
}

.editor-box {
    width: 100%;
    height: 200px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    color: var(--text-primary);
    resize: vertical;
    outline: none;
    line-height: 1.6;
}

.editor-box:focus {
    border-color: var(--accent-engineering);
}

/* Highlight Output */
.highlight-output {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    line-height: 1.6;
    min-height: 150px;
    white-space: pre-wrap;
    word-break: break-all;
    color: var(--text-muted);
}

/* Capture Groups Output */
.groups-output {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8125rem;
    line-height: 1.5;
    min-height: 100px;
    max-height: 300px;
    overflow-y: auto;
}

.groups-empty {
    color: var(--text-muted);
    font-style: italic;
}

.groups-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.groups-entry {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px;
}

.groups-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

.groups-match-title {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    color: var(--accent-engineering);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.groups-match-text {
    color: var(--text-primary);
    font-size: 0.75rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 150px;
}

.groups-items {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.group-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    background: var(--bg-card);
    border-radius: 4px;
    border-left: 2px solid var(--accent-engineering);
}

.group-number {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    color: var(--accent-engineering);
    font-size: 0.75rem;
    min-width: 24px;
}

.group-value {
    font-family: 'JetBrains Mono', monospace;
    color: var(--text-primary);
    font-size: 0.8125rem;
    word-break: break-all;
    flex: 1;
}

/* Matches */
.match-mark {
    background: rgba(59, 130, 246, 0.2);
    color: var(--text-primary);
    border-bottom: 2px solid var(--accent-engineering);
    border-radius: 2px;
    padding: 2px 0;
    cursor: default;
}

.match-mark:hover {
    background: rgba(59, 130, 246, 0.4);
}

/* Error & Warning Banners */
.status-banner {
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8125rem;
    display: none;
    align-items: center;
    gap: 10px;
}

.banner-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

.banner-info {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: #3b82f6;
}

.banner-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #f59e0b;
}

/* Sidebar */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.sidebar-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
}

.sidebar-card h3 {
    font-size: 0.875rem;
    color: var(--text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Quick Patterns */
.pattern-btn {
    display: block;
    width: 100%;
    text-align: left;
    padding: 8px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.pattern-btn:hover {
    border-color: var(--accent-engineering);
    background: var(--bg-card);
}

.pattern-btn:focus {
    outline: 2px solid var(--accent-engineering);
    outline-offset: 2px;
}

/* Cheat Sheet */
.cheat-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.cheat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    font-size: 0.8125rem;
    padding: 6px 8px;
    border-radius: 4px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-family: inherit;
    text-align: left;
    transition: background 0.2s;
}

.cheat-item:hover {
    background: var(--bg-secondary);
}

.cheat-item:focus {
    outline: 2px solid var(--accent-engineering);
    outline-offset: 2px;
}

.cheat-item:active {
    background: var(--bg-card);
}

.cheat-token {
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-engineering);
    font-weight: 600;
    background: rgba(59, 130, 246, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
}

.cheat-desc {
    color: var(--text-secondary);
}

/* Disclaimer Card */
.disclaimer-card {
    background: var(--bg-card);
    border: 1px solid rgba(239, 68, 68, 0.4);
    border-left: 4px solid rgba(239, 68, 68, 0.8);
    border-radius: 8px;
    padding: 20px;
    margin-top: 24px;
}

.disclaimer-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    color: #ef4444;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}

.disclaimer-content {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.disclaimer-list {
    margin: 12px 0;
    padding-left: 20px;
}

.disclaimer-list li {
    margin-bottom: 6px;
}

.disclaimer-footer {
    margin-top: 16px;
    font-size: 0.75rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
    font-family: 'JetBrains Mono', monospace;
}

/* License Button */
.license-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 10px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.license-btn svg {
    width: 16px;
    height: 16px;
}

.license-btn:hover {
    border-color: var(--text-muted);
    color: var(--text-primary);
    background: var(--bg-card);
}

.license-btn:focus {
    outline: 2px solid var(--accent-engineering);
    outline-offset: 2px;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-card);
    border-radius: 12px;
    max-width: 600px;
    width: 100%;
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.modal-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
}

.modal-close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.modal-close svg {
    width: 18px;
    height: 18px;
}

.modal-content {
    padding: 24px;
    overflow-y: auto;
}

.modal-content h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 16px 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.library-entry {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.library-entry:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.library-entry h4 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 6px 0;
}

.library-entry p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0 0 12px 0;
}

.library-meta {
    display: flex;
    gap: 16px;
    margin-bottom: 12px;
}

.library-meta span {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--accent-it);
    background: rgba(6, 182, 212, 0.1);
    padding: 4px 8px;
    border-radius: 4px;
}

.library-license a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--accent-it);
    text-decoration: none;
    font-size: 0.8125rem;
    font-weight: 500;
    transition: color 0.2s;
}

.library-license a:hover {
    color: var(--accent-engineering);
}

.library-license a svg {
    flex-shrink: 0;
}

/* Spinner Animation */
@keyframes spin {
    100% {
        transform: rotate(360deg);
    }
}

/* Responsive */
@media (max-width: 1024px) {
    .calculator-layout {
        grid-template-columns: 1fr;
    }
}