:root {
    --primary: #14B8A6;
    --secondary: #2DD4BF;
    --accent: #99F6E4;
    --bg: #0D1117;
    --bg-surface: rgba(22, 27, 34, 0.7);
    --border: rgba(255, 255, 255, 0.08);
    --text: #E6EDF3;
    --text-muted: #8B949E;
    --font: 'Inter', system-ui, sans-serif;
    --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
}

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

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    height: 100vh;
    overflow: hidden
}

.glass {
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border)
}

.app {
    display: flex;
    height: 100vh
}

/* Sidebar */
.sidebar {
    width: 300px;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border);
    z-index: 10;
    flex-shrink: 0
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 24px;
    color: var(--primary)
}

.logo h1 {
    font-size: 1.3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent
}

.logo i {
    width: 24px;
    height: 24px
}

.search-box {
    margin: 0 16px 12px;
    position: relative
}

.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--text-muted)
}

.search-box input {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 8px;
    padding: 10px 10px 10px 36px;
    font-size: .85rem;
    font-family: inherit;
    transition: all .2s
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(20, 184, 166, .2)
}

.filter-group {
    padding: 0 16px;
    margin-bottom: 12px
}

.filter-group label {
    display: block;
    font-size: .7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 4px
}

.filter-group select {
    width: 100%;
    background: rgba(0, 0, 0, .3);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 8px;
    padding: 8px 10px;
    font-size: .85rem;
    font-family: inherit;
    cursor: pointer
}

.filter-group select:focus {
    outline: none;
    border-color: var(--primary)
}

.pairing-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px
}

.pairing-list::-webkit-scrollbar {
    width: 4px
}

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

.pairing-item {
    padding: 12px;
    border-radius: 10px;
    cursor: pointer;
    transition: all .2s;
    border: 1px solid transparent;
    margin-bottom: 4px
}

.pairing-item:hover {
    background: rgba(255, 255, 255, .04);
    border-color: var(--border)
}

.pairing-item.active {
    background: rgba(20, 184, 166, .08);
    border-color: rgba(20, 184, 166, .3)
}

.pairing-item .pair-heading {
    font-size: .95rem;
    font-weight: 600;
    margin-bottom: 2px
}

.pairing-item .pair-body {
    font-size: .8rem;
    color: var(--text-muted)
}

.pairing-item .pair-tags {
    display: flex;
    gap: 4px;
    margin-top: 6px
}

.pairing-item .pair-tags span {
    font-size: .65rem;
    padding: 2px 6px;
    border-radius: 4px;
    background: rgba(255, 255, 255, .06);
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .5px
}

.sidebar-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center
}

.count {
    font-size: .8rem;
    color: var(--text-muted)
}

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

.toolbar {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap
}

.controls-row {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    flex: 1
}

.control {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 120px
}

.control label {
    font-size: .7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted)
}

.control input[type=range] {
    width: 100%;
    accent-color: var(--primary);
    cursor: pointer
}

.control span {
    font-size: .75rem;
    color: var(--accent);
    font-family: var(--mono)
}

.toolbar-actions {
    display: flex;
    gap: 10px
}

.btn-primary,
.btn-secondary {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 600;
    font-size: .85rem;
    cursor: pointer;
    transition: all .2s;
    font-family: inherit;
    border: none
}

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

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

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, .05)
}

.icon-btn {
    background: rgba(0, 0, 0, .2);
    border: 1px solid var(--border);
    color: var(--text-muted);
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all .2s
}

.icon-btn:hover {
    color: var(--primary);
    border-color: var(--primary)
}

.icon-btn.active {
    color: var(--primary)
}

.icon-btn.active i {
    fill: var(--primary)
}

/* Preview */
.preview-area {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    overflow-y: auto
}

.preview-card {
    max-width: 800px;
    width: 100%;
    padding: 48px;
    border-radius: 20px
}

.preview-heading {
    font-weight: 700;
    margin-bottom: 24px;
    line-height: 1.2;
    transition: all .3s
}

.preview-body {
    color: var(--text-muted);
    transition: all .3s
}

.preview-meta {
    display: flex;
    gap: 16px;
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    font-size: .8rem;
    color: var(--text-muted);
    font-family: var(--mono)
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(13, 17, 23, .85);
    backdrop-filter: blur(4px);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity .3s
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all
}

.modal {
    width: 600px;
    max-width: 90vw;
    border-radius: 16px;
    overflow: hidden;
    transform: translateY(20px);
    transition: transform .3s
}

.modal-overlay.active .modal {
    transform: translateY(0)
}

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

.modal-header h2 {
    font-size: 1.2rem
}

.modal-body {
    padding: 24px
}

.modal-body pre {
    background: rgba(0, 0, 0, .4);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px;
    overflow-x: auto;
    margin-bottom: 16px;
    font-family: var(--mono);
    font-size: .85rem;
    line-height: 1.6;
    color: var(--accent)
}

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text);
    color: var(--bg);
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: 600;
    font-size: .85rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, .3);
    z-index: 200;
    opacity: 0;
    transition: all .3s cubic-bezier(.175, .885, .32, 1.275)
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1
}

@media(max-width:768px) {
    .app {
        flex-direction: column
    }

    .sidebar {
        width: 100%;
        height: auto;
        max-height: 50vh;
        border-right: none;
        border-bottom: 1px solid var(--border)
    }

    .toolbar {
        flex-direction: column;
        align-items: stretch
    }

    .preview-area {
        padding: 16px
    }

    .preview-card {
        padding: 24px
    }
}