:root {
    --primary: #00B4D8;
    --primary-hover: #0096C7;
    --accent: #48CAE4;
    --bg: #0D1117;
    --panel-bg: rgba(22, 27, 34, 0.8);
    --text: #F0F6FC;
    --text-muted: #8B949E;
    --border: #30363D;
    --radius: 12px;
    --error: #FF7B72;
    --success: #3FB950;
}

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

body {
    font-family: 'Inter', system-ui, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    justify-content: center;
}

.app {
    width: 100%;
    max-width: 1200px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    height: 100vh;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.logo svg {
    color: var(--primary);
    filter: drop-shadow(0 0 8px rgba(0, 180, 216, 0.6));
}

h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
}

.header-actions {
    display: flex;
    gap: 1rem;
}

.glass-panel {
    background: var(--panel-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.glass-btn {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-family: inherit;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.glass-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary);
}

.glass-btn.action-primary {
    background: var(--primary);
    color: var(--bg);
    border-color: var(--primary);
    font-weight: 600;
}

.glass-btn.action-primary:hover {
    background: var(--accent);
    box-shadow: 0 0 12px rgba(72, 202, 228, 0.4);
}

.glass-btn.block {
    width: 100%;
    margin-top: 1rem;
}

.glass-btn.small {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

/* Main Content */
.main-content {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 1.5rem;
    flex: 1;
    min-height: 0;
}

.sidebar {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.sidebar h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
}

.text-input,
.file-input {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.6rem;
    border-radius: 6px;
    font-family: inherit;
    transition: border-color 0.2s;
}

.text-input:focus {
    outline: none;
    border-color: var(--primary);
}

.hotkey-input {
    cursor: pointer;
    text-align: center;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.hotkey-input.listening {
    border-color: var(--accent);
    background: rgba(72, 202, 228, 0.1);
    box-shadow: 0 0 8px rgba(72, 202, 228, 0.4);
}

/* Board Area */
.board-area {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    overflow: hidden;
}

.controls-bar {
    padding: 1rem;
    display: flex;
    align-items: center;
}

.category-filters {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
}

.filter-btn:hover {
    color: var(--text);
    border-color: var(--text-muted);
}

.filter-btn.active {
    background: rgba(0, 180, 216, 0.15);
    color: var(--primary);
    border-color: var(--primary);
}

.sound-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1.2rem;
    overflow-y: auto;
    padding-right: 10px;
    align-content: start;
}

.sound-pad {
    background: rgba(22, 27, 34, 0.8);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
    cursor: pointer;
    position: relative;
    user-select: none;
    transition: transform 0.1s, border-color 0.2s, box-shadow 0.2s;
}

.sound-pad:hover {
    border-color: var(--text-muted);
}

.sound-pad:active {
    transform: scale(0.96);
}

.sound-pad.playing {
    border-color: var(--primary);
    box-shadow: 0 0 20px rgba(0, 180, 216, 0.3);
    animation: pulse 1s infinite;
}

.pad-hotkey {
    position: absolute;
    top: -10px;
    left: -10px;
    background: var(--bg);
    border: 2px solid var(--primary);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 700;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    text-transform: uppercase;
}

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

.pad-controls {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 0.5rem;
    margin-top: auto;
}

.volume-control {
    width: 100%;
    accent-color: var(--primary);
    height: 4px;
    cursor: pointer;
}

.pad-toggles {
    display: flex;
    justify-content: space-between;
}

.toggle-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.75rem;
    cursor: pointer;
    transition: color 0.2s;
}

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

.toggle-btn.active {
    color: var(--accent);
    font-weight: 600;
}

.delete-btn {
    position: absolute;
    top: 5px;
    right: 5px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s, color 0.2s;
    font-size: 0.9rem;
}

.sound-pad:hover .delete-btn {
    opacity: 1;
}

.delete-btn:hover {
    color: var(--error);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.02);
    }

    100% {
        transform: scale(1);
    }
}