:root {
    --bg-base: #090a0f;
    --bg-surface: #13151f;
    --bg-surface-glass: rgba(19, 21, 31, 0.75);
    --border-color: #242a3e;
    --border-glow: rgba(0, 240, 255, 0.3);
    --text-primary: #f0f4f8;
    --text-secondary: #94a3b8;
    --accent-cyan: #00f0ff;
    --accent-green: #10b981;
    --accent-amber: #f59e0b;
    --accent-red: #ef4444;
    --accent-purple: #8b5cf6;
    --font-mono: 'JetBrains Mono', monospace;
    --font-sans: 'Plus Jakarta Sans', sans-serif;
    --radius: 10px;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    overflow-x: hidden;
}

#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 0;
    opacity: 0.4;
}

.app-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    min-height: 100vh;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-surface-glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid var(--accent-cyan);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.2);
}

.logo-title {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    color: var(--text-primary);
}

.logo-subtitle {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

.header-badges {
    display: flex;
    gap: 12px;
}

.badge {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 6px 12px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.03);
    display: flex;
    align-items: center;
    gap: 8px;
}

.badge.security {
    border-color: rgba(16, 185, 129, 0.4);
    color: var(--accent-green);
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background-color: var(--accent-green);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--accent-green);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); opacity: 0.8; }
    50% { transform: scale(1.2); opacity: 1; box-shadow: 0 0 12px var(--accent-green); }
    100% { transform: scale(0.95); opacity: 0.8; }
}

/* Nav Tabs */
.tool-nav {
    display: flex;
    gap: 8px;
    background: var(--bg-surface-glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    padding: 8px;
    border-radius: var(--radius);
    overflow-x: auto;
}

.nav-tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 12px 16px;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.nav-tab:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
}

.nav-tab.active {
    background: rgba(0, 240, 255, 0.08);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.15);
}

/* Workbench Main */
.workbench-main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.tool-section {
    display: none;
    flex-direction: column;
    gap: 16px;
    background: var(--bg-surface-glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.tool-section.active {
    display: flex;
    animation: fadeIn 0.3s ease-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.tool-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
    flex-wrap: wrap;
    gap: 12px;
}

.tool-header h2 {
    font-size: 1.2rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--text-primary);
}

.tool-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

/* Buttons & Inputs */
.btn {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
}

.btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--text-secondary);
}

.btn.primary {
    background: var(--accent-cyan);
    color: var(--bg-base);
    border-color: var(--accent-cyan);
}

.btn.primary:hover {
    background: #33f3ff;
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.75rem;
}

label {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: block;
    margin-bottom: 8px;
}

textarea, input[type="text"], select {
    width: 100%;
    background: var(--bg-base);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    padding: 12px;
    resize: vertical;
    transition: var(--transition);
}

textarea:focus, input[type="text"]:focus, select:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

textarea {
    min-height: 220px;
}

.tool-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 900px) {
    .tool-grid {
        grid-template-columns: 1fr;
    }
}

.pane {
    display: flex;
    flex-direction: column;
}

.pane.full-width {
    grid-column: 1 / -1;
}

.pane-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.status-badge {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 4px;
}

.status-badge.valid {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-green);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-badge.invalid {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-red);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.stats-bar {
    display: flex;
    gap: 24px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    padding: 12px 16px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.stats-bar strong {
    color: var(--text-primary);
}

/* JWT Specific */
.jwt-split-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 900px) {
    .jwt-split-grid {
        grid-template-columns: 1fr;
    }
}

.jwt-claims-card {
    display: flex;
    gap: 24px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    padding: 16px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    flex-wrap: wrap;
}

.claim-item span {
    color: var(--text-secondary);
}

.status-ok { color: var(--accent-green); }
.status-err { color: var(--accent-red); }

/* Regex Specific */
.regex-flags {
    display: flex;
    gap: 16px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    align-items: center;
}

.regex-flags label {
    display: flex;
    gap: 6px;
    align-items: center;
    cursor: pointer;
    margin-bottom: 0;
}

.input-prefix-wrapper {
    display: flex;
    align-items: center;
    background: var(--bg-base);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0 12px;
}

.input-prefix-wrapper input {
    border: none;
    background: transparent;
    padding: 12px 4px;
}

.input-prefix-wrapper input:focus {
    box-shadow: none;
}

.prefix {
    font-family: var(--font-mono);
    color: var(--accent-cyan);
    font-weight: 700;
}

.rich-output-box {
    background: var(--bg-base);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px;
    min-height: 220px;
    max-height: 350px;
    overflow-y: auto;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
}

.match-item {
    background: rgba(0, 240, 255, 0.08);
    border-left: 3px solid var(--accent-cyan);
    padding: 6px 10px;
    margin-bottom: 8px;
    border-radius: 0 4px 4px 0;
}

.match-group {
    color: var(--text-secondary);
    font-size: 0.75rem;
    margin-top: 2px;
}

/* Crypto Specific */
.crypto-outputs-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 900px) {
    .crypto-outputs-grid {
        grid-template-columns: 1fr;
    }
}

.copy-row {
    display: flex;
    gap: 8px;
}

.copy-row input {
    flex: 1;
}

/* Algorithm Visualizer */
.visualizer-container {
    background: var(--bg-base);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    height: 320px;
    display: flex;
    align-items: flex-end;
    padding: 16px;
    position: relative;
    overflow: hidden;
}

.bars-wrapper {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: flex-end;
    gap: 4px;
}

.bar {
    flex: 1;
    background: var(--accent-cyan);
    border-radius: 2px 2px 0 0;
    transition: height 0.05s ease;
}

.bar.comparing {
    background: var(--accent-amber);
    box-shadow: 0 0 10px var(--accent-amber);
}

.bar.swapping {
    background: var(--accent-red);
    box-shadow: 0 0 10px var(--accent-red);
}

.bar.sorted {
    background: var(--accent-green);
}

.dropdown-select {
    width: auto;
    padding: 8px 12px;
}

/* Footer */
.app-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-surface-glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 16px 24px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    flex-wrap: wrap;
    gap: 12px;
}

.footer-links {
    display: flex;
    gap: 16px;
}

.footer-links a {
    color: var(--accent-cyan);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    text-decoration: underline;
}