:root {
    --bg-primary: #f8f9fa;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f0f4f8;
    --text-primary: #1a1a2e;
    --text-secondary: #6c757d;
    --text-card: #1a1a2e;
    --accent: #0cf574;
    --accent-hover: #0bd666;
    --border: #e0e0e0;
    --shadow: rgba(0, 0, 0, 0.08);
    --shadow-hover: rgba(0, 0, 0, 0.15);
    --radius: 12px;
    --transition: 0.2s ease;
}

[data-theme="dark"] {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-card: #161b22;
    --bg-card-hover: #1f2937;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-card: #e6edf3;
    --accent: #0cf574;
    --accent-hover: #0bd666;
    --border: #30363d;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-hover: rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    transition: background-color var(--transition), color var(--transition);
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    transition: background-color var(--transition), border-color var(--transition);
}

.logo {
    font-size: 1.75rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), #00b4d8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.theme-toggle {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.25rem;
    transition: all var(--transition);
}

.theme-toggle:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent);
    transform: scale(1.05);
}

.main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.section-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.tools-section {
    margin-bottom: 2.5rem;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.tool-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text-card);
    transition: all var(--transition);
}

.tool-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-hover);
}

.tool-icon {
    font-size: 2rem;
}

.tool-name {
    font-weight: 600;
    font-size: 1rem;
}

.tool-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.panels-section {
    margin-bottom: 2rem;
}

.panels-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
}

.panel-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text-card);
    transition: all var(--transition);
}

.panel-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-hover);
}

.panel-icon {
    font-size: 2.5rem;
}

.panel-name {
    font-weight: 600;
    font-size: 0.95rem;
    text-align: center;
    word-break: break-word;
}

.loading,
.empty-state,
.error-state {
    grid-column: 1 / -1;
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.error-state {
    color: #f54242;
}

.empty-state a {
    color: var(--accent);
    text-decoration: none;
}

.empty-state a:hover {
    text-decoration: underline;
}

.host-section {
    margin-bottom: 2.5rem;
}

.host-controls {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    box-shadow: 0 2px 8px var(--shadow);
    transition: border-color var(--transition);
    margin-bottom: 1rem;
}

.host-controls:hover {
    border-color: var(--border-hover);
}

.control-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.control-row label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    white-space: nowrap;
}

#url-display {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.35rem 0.75rem;
    min-width: 180px;
    display: inline-block;
    transition: border-color var(--transition);
}

.btn-primary,
.btn-secondary,
.btn-dashed {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: all var(--transition);
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    -webkit-touch-callout: none;
    -webkit-tap-highlight-color: transparent;
}

.btn-primary,
.btn-secondary,
.btn-dashed:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
}

.btn-primary:active,
.btn-secondary:active,
.btn-dashed:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--accent);
    color: #0d1117;
    border-color: var(--accent);
    font-weight: 600;
}

.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: 0 0 12px var(--accent-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--text-secondary);
}

.btn-secondary:hover {
    color: var(--text-primary);
}

.btn-dashed {
    background: transparent;
    color: var(--text-secondary);
    border-style: dashed;
}

.btn-dashed:hover {
    color: var(--accent);
    border-color: var(--accent);
}

#log-container {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow-y: auto;
    padding: 0.75rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.6;
    box-shadow: inset 0 2px 4px var(--shadow);
    scroll-behavior: smooth;
    max-height: 300px;
}

.log-entry {
    padding: 0.25rem 0;
    border-bottom: 1px solid rgba(48, 54, 61, 0.5);
    color: var(--text-primary);
    display: flex;
    gap: 0.5rem;
    align-items: baseline;
}

.log-entry:last-child {
    border-bottom: none;
}

.log-timestamp {
    color: var(--text-muted);
    font-size: 0.75rem;
    min-width: 80px;
    flex-shrink: 0;
}

.log-type {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    min-width: 60px;
    flex-shrink: 0;
}

.log-type.error {
    color: #f54242;
}

.log-type.warning {
    color: #f0b429;
}

.log-type.info {
    color: #00b4d8;
}

:root {
    --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
    --radius-sm: 6px;
    --bg-input: var(--bg-primary);
    --text-muted: #6e7681;
    --accent-glow: rgba(12, 245, 116, 0.15);
    --border-hover: #484f58;
}

[data-theme="dark"] {
    --bg-input: #0d1117;
    --text-muted: #6e7681;
}

@media (max-width: 600px) {
    .header {
        padding: 1rem;
    }

    .main {
        padding: 1rem;
    }

    .tools-grid,
    .panels-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }

    .host-controls {
        padding: 0.75rem;
    }

    .control-row {
        width: 100%;
    }

    #url-display {
        width: 100%;
        min-width: unset;
    }

    .btn-primary,
    .btn-secondary,
    .btn-dashed {
        flex: 1;
        text-align: center;
    }
}