/* ─── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg-deep: #0a0a14;
    --bg-panel: rgba(18, 18, 32, 0.75);
    --bg-card: rgba(28, 28, 48, 0.6);
    --bg-card-hover: rgba(38, 38, 64, 0.7);
    --glass-border: rgba(255, 255, 255, 0.06);
    --glass-highlight: rgba(255, 255, 255, 0.04);
    --text-primary: #e8e8f0;
    --text-secondary: #8888aa;
    --text-dim: #555570;
    --accent: #6c5ce7;
    --accent-bright: #a29bfe;
    --accent-glow: rgba(108, 92, 231, 0.3);
    --success: #00cec9;
    --danger: #ff6b6b;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-xs: 6px;
    --transition: 0.2s ease;
}

html { font-size: 14px; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background: var(--bg-deep);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Subtle grid pattern */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(108, 92, 231, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(0, 206, 201, 0.04) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

a { color: var(--accent-bright); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ─── Top Bar ──────────────────────────────────────────────── */
.top-bar {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    background: rgba(10, 10, 20, 0.85);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--glass-border);
}

.logo {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* ─── Layout ───────────────────────────────────────────────── */
.app-layout {
    position: relative;
    z-index: 1;
    display: flex;
    gap: 0;
    min-height: calc(100vh - 48px);
}

.panel {
    padding: 20px;
}

.settings-panel {
    width: 380px;
    min-width: 340px;
    max-height: calc(100vh - 48px);
    overflow-y: auto;
    background: var(--bg-panel);
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.preview-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding-top: 24px;
}

/* ─── Cards (glassmorphism) ────────────────────────────────── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 16px;
    transition: background var(--transition);
}
.card:hover {
    background: var(--bg-card-hover);
}
.card h3 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ─── Drop Zone ────────────────────────────────────────────── */
.drop-zone {
    border: 2px dashed rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    padding: 24px 16px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
}
.drop-zone:hover, .drop-zone.dragover {
    border-color: var(--accent);
    background: var(--accent-glow);
}
.drop-icon { font-size: 2rem; display: block; margin-bottom: 8px; }
.drop-zone p { color: var(--text-secondary); font-size: 0.85rem; }
.drop-zone small { color: var(--text-dim); font-size: 0.75rem; }

/* Uploaded file pills */
.uploaded-files {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 8px;
}
.file-pill {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(108, 92, 231, 0.15);
    border: 1px solid rgba(108, 92, 231, 0.25);
    border-radius: 20px;
    padding: 4px 10px 4px 6px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition);
}
.file-pill.active {
    background: rgba(108, 92, 231, 0.35);
    border-color: var(--accent);
}
.file-pill:hover { background: rgba(108, 92, 231, 0.25); }
.file-pill .thumb {
    width: 24px;
    height: 24px;
    border-radius: 4px;
    object-fit: cover;
}
.file-pill .remove {
    margin-left: 4px;
    opacity: 0.5;
    cursor: pointer;
}
.file-pill .remove:hover { opacity: 1; color: var(--danger); }

/* ─── Chips (device/lang selection) ────────────────────────── */
.chip-group {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.chip {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    cursor: pointer;
    transition: all var(--transition);
    user-select: none;
}
.chip:hover { background: rgba(255, 255, 255, 0.1); }
.chip.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
    box-shadow: 0 0 12px var(--accent-glow);
}
.chip.multi-active {
    background: rgba(108, 92, 231, 0.25);
    border-color: var(--accent);
    color: var(--accent-bright);
}

/* ─── Layout Grid ──────────────────────────────────────────── */
.layout-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}
.layout-card {
    position: relative;
    background: rgba(255, 255, 255, 0.03);
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 10px 6px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
}
.layout-card:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.12);
}
.layout-card.active {
    border-color: var(--accent);
    background: rgba(108, 92, 231, 0.12);
    box-shadow: 0 0 12px var(--accent-glow);
}
.layout-card .layout-icon { font-size: 1.4rem; display: block; margin-bottom: 4px; }
.layout-card .layout-name { font-size: 0.65rem; color: var(--text-secondary); line-height: 1.2; }

/* ─── Form Elements ────────────────────────────────────────── */
.form-group {
    margin-bottom: 10px;
}
.form-group label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

input[type="text"], select {
    width: 100%;
    padding: 8px 12px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xs);
    color: var(--text-primary);
    font-size: 0.85rem;
    outline: none;
    transition: border var(--transition);
}
input[type="text"]:focus, select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

input[type="range"] {
    width: 100%;
    accent-color: var(--accent);
}

input[type="color"] {
    width: 36px;
    height: 28px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    background: none;
    padding: 0;
}

.color-row { margin-bottom: 10px; }
.color-row label { font-size: 0.75rem; color: var(--text-secondary); margin-bottom: 4px; display: block; }
.color-inputs { display: flex; gap: 8px; }

.toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 0;
}
.toggle-row label { font-size: 0.8rem; color: var(--text-secondary); }

input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
    cursor: pointer;
}

/* ─── Presets ──────────────────────────────────────────────── */
.preset-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 8px;
}
.preset-btn {
    background: none;
    border: 2px solid var(--glass-border);
    border-radius: 8px;
    padding: 2px;
    cursor: pointer;
    transition: all var(--transition);
}
.preset-btn:hover { border-color: var(--accent); transform: scale(1.1); }
.preset-swatch {
    display: block;
    width: 28px;
    height: 28px;
    border-radius: 6px;
}

/* ─── Buttons ──────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}
.btn:active { transform: scale(0.97); }

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 2px 12px var(--accent-glow);
}
.btn-primary:hover { background: #7c6cf7; }

.btn-accent {
    background: rgba(0, 206, 201, 0.15);
    color: var(--success);
    border: 1px solid rgba(0, 206, 201, 0.3);
}
.btn-accent:hover { background: rgba(0, 206, 201, 0.25); }

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--glass-border);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.05); color: var(--text-primary); }

.btn-sm { padding: 5px 10px; font-size: 0.75rem; }
.btn-lg { padding: 12px 20px; font-size: 0.9rem; }
.btn-block { width: 100%; }

.generate-section { display: flex; flex-direction: column; gap: 8px; }

/* ─── Progress ─────────────────────────────────────────────── */
.progress-container {
    margin-top: 8px;
}
.progress-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
    overflow: hidden;
}
.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent), var(--success));
    border-radius: 3px;
    transition: width 0.3s ease;
}
.progress-text {
    display: block;
    text-align: center;
    font-size: 0.7rem;
    color: var(--text-dim);
    margin-top: 4px;
}

/* ─── Preview Panel ────────────────────────────────────────── */
.preview-header {
    text-align: center;
}
.preview-header h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}
.preview-device-info {
    font-size: 0.75rem;
    color: var(--text-dim);
}

.preview-frame {
    position: relative;
    max-width: 420px;
    width: 100%;
    aspect-ratio: 1290 / 2796;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-placeholder {
    text-align: center;
    color: var(--text-dim);
    padding: 40px 20px;
}
.placeholder-icon { font-size: 3rem; display: block; margin-bottom: 12px; }
.preview-placeholder p { font-size: 0.8rem; line-height: 1.5; }

.preview-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* Loading spinner on preview */
.preview-frame.loading::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(10, 10, 20, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
}
.preview-frame.loading::before {
    content: '';
    position: absolute;
    z-index: 2;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 32px;
    height: 32px;
    border: 3px solid var(--glass-border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: translate(-50%, -50%) rotate(360deg); } }

/* ─── Scrollbar ────────────────────────────────────────────── */
.settings-panel::-webkit-scrollbar { width: 6px; }
.settings-panel::-webkit-scrollbar-track { background: transparent; }
.settings-panel::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
}
.settings-panel::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.15); }

/* ─── Responsive ───────────────────────────────────────────── */
@media (max-width: 900px) {
    .app-layout {
        flex-direction: column;
    }
    .settings-panel {
        width: 100%;
        max-width: none;
        min-width: auto;
        max-height: none;
        border-right: none;
        border-bottom: 1px solid var(--glass-border);
    }
    .preview-panel {
        padding: 20px;
    }
    .preview-frame {
        max-width: 300px;
    }
    .layout-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

@media (max-width: 600px) {
    .settings-panel { padding: 12px; }
    .card { padding: 12px; }
    .layout-grid { grid-template-columns: repeat(3, 1fr); }
    .preview-frame { max-width: 250px; }
    .top-bar { padding: 10px 16px; }
    .logo { font-size: 1rem; }
}

/* ─── Toast Notifications ──────────────────────────────────── */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.toast {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-sm);
    padding: 10px 16px;
    font-size: 0.8rem;
    color: var(--text-primary);
    animation: slideIn 0.3s ease;
    max-width: 300px;
}
.toast.success { border-color: rgba(0, 206, 201, 0.4); }
.toast.error { border-color: rgba(255, 107, 107, 0.4); }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}