/* Reset and base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --border: #30363d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --accent: #ffd100;
    --accent-dark: #0f4065;
    --accent-hover: #ffda33;
    --danger: #f85149;
    --success: #3fb950;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Topbar */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    z-index: 10;
}

.topbar h1 {
    font-family: 'Anton', sans-serif;
    font-size: 1.4rem;
    color: var(--accent);
    letter-spacing: 0.5px;
}

/* Buttons */
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--accent);
    color: #000;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--border);
}

.btn-full {
    width: 100%;
}

.btn-danger {
    background: transparent;
    color: var(--danger);
    border: 1px solid var(--danger);
    padding: 4px 8px;
    font-size: 0.75rem;
}

.btn-danger:hover {
    background: var(--danger);
    color: white;
}
.btn-accent {
    background: var(--accent-dark);
    color: var(--accent);
    border: 1px solid var(--accent);
}
.btn-accent:hover {
    background: var(--accent);
    color: #000;
}
.btn-small {
    padding: 5px 10px;
    font-size: 0.75rem;
    white-space: nowrap;
}
.link-input-row {
    display: flex;
    gap: 6px;
    align-items: center;
}
.link-input {
    flex: 1;
    min-width: 0;
}
.loading-indicator {
    color: var(--accent);
    font-size: 0.75rem;
    padding: 4px 0;
}

/* Main layout */
.main-layout {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 340px;
    min-width: 340px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: 8px;
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

/* Sections */
.section {
    margin-bottom: 4px;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    background: var(--bg-tertiary);
    cursor: pointer;
    user-select: none;
    font-weight: 600;
    font-size: 0.85rem;
    transition: background 0.2s;
}

.section-header:hover {
    background: var(--border);
}

.section-header .arrow {
    font-size: 0.7rem;
    transition: transform 0.2s;
}

.section-body {
    padding: 12px;
    transition: max-height 0.3s ease, padding 0.3s ease;
    overflow: hidden;
}

.section-body.collapsed {
    max-height: 0;
    padding: 0 12px;
}

/* Controls */
.control-group {
    margin-bottom: 10px;
}

.control-group:last-child {
    margin-bottom: 0;
}

.control-group label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.control-group label:has(input[type="checkbox"]) {
    cursor: pointer;
}

.control-row {
    display: flex;
    gap: 10px;
}

.control-row .control-group {
    flex: 1;
}

/* Inputs */
input[type="range"] {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-primary);
    border-radius: 3px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: 2px solid var(--bg-primary);
}

input[type="number"],
input[type="text"],
select,
textarea {
    width: 100%;
    padding: 6px 10px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
    outline: none;
    transition: border-color 0.2s;
}

input[type="number"]:focus,
input[type="text"]:focus,
select:focus,
textarea:focus {
    border-color: var(--accent);
}

input[type="color"] {
    width: 100%;
    height: 32px;
    padding: 2px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
}

input[type="checkbox"] {
    accent-color: var(--accent);
}

textarea {
    resize: vertical;
    min-height: 50px;
}

/* Upload zone */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: 8px;
    padding: 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 10px;
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--accent);
    background: rgba(255, 209, 0, 0.05);
}

.upload-placeholder {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.upload-preview {
    max-width: 100%;
    max-height: 100px;
    border-radius: 4px;
    object-fit: contain;
}

/* Canvas area */
.canvas-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    padding: 20px;
    overflow: hidden;
}

#canvas {
    border: 1px solid var(--border);
    border-radius: 4px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    max-width: 100%;
    max-height: 100%;
}

/* Speaker cards */
.speaker-card {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px;
    margin-top: 10px;
}

.speaker-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.speaker-card-header span {
    font-weight: 600;
    font-size: 0.8rem;
    color: var(--accent);
}

.speaker-card-actions {
    display: flex;
    gap: 4px;
}

.speaker-card-actions button {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    width: 24px;
    height: 24px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.7rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.speaker-card-actions button:hover {
    background: var(--border);
    color: var(--text-primary);
}

.speaker-card-actions button.remove:hover {
    background: var(--danger);
    color: white;
    border-color: var(--danger);
}

.speaker-upload {
    border: 1px dashed var(--border);
    border-radius: 6px;
    padding: 8px;
    text-align: center;
    cursor: pointer;
    margin-bottom: 8px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.speaker-upload:hover {
    border-color: var(--accent);
}

.speaker-upload img {
    max-width: 100%;
    max-height: 60px;
    border-radius: 4px;
}

/* Responsive */
@media (max-width: 900px) {
    .main-layout {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        min-width: unset;
        max-height: 40vh;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
}