/* ======================================================
   CUBETONE AI — Stylesheet
   Design: Dark Theme, Desktop-First, Professional
   ====================================================== */

:root {
    --bg-primary: #0d0f14;
    --bg-secondary: #13161e;
    --bg-card: #1a1d27;
    --bg-card-hover: #1f2333;
    --bg-input: #0f1117;
    --border: #2a2d3a;
    --border-light: #353849;
    --text-primary: #e8eaf0;
    --text-secondary: #9097b2;
    --text-muted: #5c6380;
    --accent: #6c63ff;
    --accent-hover: #8075ff;
    --accent-light: rgba(108, 99, 255, 0.15);
    --accent-glow: rgba(108, 99, 255, 0.4);
    --green: #22c55e;
    --green-light: rgba(34, 197, 94, 0.15);
    --orange: #f97316;
    --orange-light: rgba(249, 115, 22, 0.15);
    --red: #ef4444;
    --red-light: rgba(239, 68, 68, 0.15);
    --yellow: #eab308;
    --yellow-light: rgba(234, 179, 8, 0.15);
    --purple: #a855f7;
    --sidebar-w: 260px;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.6);
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ===== LOGIN SCREEN ===== */
.login-screen {
    position: fixed; inset: 0;
    display: flex; align-items: center; justify-content: center;
    background: var(--bg-primary);
    z-index: 1000;
    transition: opacity 0.5s, visibility 0.5s;
}

.login-screen.hidden { opacity: 0; visibility: hidden; pointer-events: none; }

.login-bg {
    position: absolute; inset: 0;
    overflow: hidden;
}

.login-bg-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.25;
    animation: orbFloat 8s ease-in-out infinite;
}
.orb1 { width: 500px; height: 500px; background: var(--accent); top: -100px; left: -100px; animation-delay: 0s; }
.orb2 { width: 400px; height: 400px; background: var(--purple); bottom: -100px; right: -100px; animation-delay: -3s; }
.orb3 { width: 300px; height: 300px; background: var(--green); top: 50%; right: 30%; animation-delay: -5s; }

@keyframes orbFloat {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-30px) scale(1.05); }
}

.login-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 48px;
    max-width: 480px;
    width: 90%;
    box-shadow: var(--shadow-lg), 0 0 80px rgba(108, 99, 255, 0.15);
    animation: slideUp 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(40px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.login-logo { text-align: center; margin-bottom: 32px; }

.logo-icon {
    width: 80px; height: 80px;
    background: linear-gradient(135deg, var(--accent), var(--purple));
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 16px;
    font-size: 32px;
    color: white;
    box-shadow: 0 0 40px var(--accent-glow);
}

.login-logo h1 {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, #fff, var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline;
}

.ai-badge, .ai-badge-sm {
    background: linear-gradient(135deg, var(--accent), var(--purple));
    color: white;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 20px;
    vertical-align: super;
    letter-spacing: 0.5px;
    -webkit-text-fill-color: white;
}
.ai-badge-sm { font-size: 0.5rem; padding: 1px 5px; }

.login-subtitle {
    color: var(--text-secondary);
    margin-top: 8px;
    font-size: 0.9rem;
}

.login-compat-badge {
    display: inline-flex; align-items: center; gap: 6px;
    background: var(--green-light);
    color: var(--green);
    border: 1px solid rgba(34, 197, 94, 0.3);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
    margin-top: 12px;
}

.login-features {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 28px;
}

.feat-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.feat-item i {
    width: 20px;
    color: var(--accent);
    flex-shrink: 0;
}

.login-actions { display: flex; flex-direction: column; gap: 12px; }

.btn-google {
    display: flex; align-items: center; justify-content: center; gap: 12px;
    background: #fff;
    color: #1f1f1f;
    border: none;
    border-radius: var(--radius-sm);
    padding: 14px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
    width: 100%;
}
.btn-google:hover { background: #f0f0f0; transform: translateY(-1px); box-shadow: 0 4px 20px rgba(0,0,0,0.3); }

.btn-demo {
    display: flex; align-items: center; justify-content: center; gap: 10px;
    background: var(--accent-light);
    color: var(--accent);
    border: 1px solid rgba(108, 99, 255, 0.3);
    border-radius: var(--radius-sm);
    padding: 14px 24px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
    width: 100%;
}
.btn-demo:hover { background: var(--accent); color: white; transform: translateY(-1px); }

.login-note {
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 20px;
    display: flex; align-items: center; justify-content: center; gap: 6px;
}

/* ===== MAIN APP LAYOUT ===== */
.app {
    display: flex;
    min-height: 100vh;
}
.app.hidden { display: none; }

/* ===== SIDEBAR ===== */
.sidebar {
    width: var(--sidebar-w);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 100;
    transition: transform var(--transition);
}

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

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.sidebar-logo i {
    color: var(--accent);
    font-size: 1.3rem;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
    transition: var(--transition);
    font-size: 1rem;
    display: none;
}
.sidebar-toggle:hover { background: var(--border); color: var(--text-primary); }

.sidebar-nav {
    padding: 16px 12px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 14px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    cursor: pointer;
}
.nav-item:hover { background: var(--bg-card); color: var(--text-primary); }
.nav-item.active {
    background: var(--accent-light);
    color: var(--accent);
    border: 1px solid rgba(108, 99, 255, 0.2);
}
.nav-item i { width: 18px; text-align: center; }
.nav-item span:last-child:not(.nav-badge) { flex: 1; }

.nav-badge {
    background: var(--accent);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 1px 7px;
    border-radius: 10px;
    min-width: 22px;
    text-align: center;
}

.sidebar-compat {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.compat-badge, .compat-device {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    color: var(--text-muted);
}
.compat-badge i { color: var(--accent); }
.compat-device i { color: var(--green); }

.sidebar-user {
    padding: 16px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-avatar {
    width: 36px; height: 36px;
    background: linear-gradient(135deg, var(--accent), var(--purple));
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: white;
    font-size: 0.85rem;
    font-weight: 600;
    flex-shrink: 0;
    overflow: hidden;
}
.user-avatar img { width: 100%; height: 100%; object-fit: cover; }

.user-avatar-sm {
    width: 30px; height: 30px;
    background: linear-gradient(135deg, var(--accent), var(--purple));
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    flex-shrink: 0;
    overflow: hidden;
}
.user-avatar-sm img { width: 100%; height: 100%; object-fit: cover; }

.user-info { flex: 1; min-width: 0; }
.user-name { font-size: 0.85rem; font-weight: 600; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-email { font-size: 0.72rem; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.btn-logout {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
    transition: var(--transition);
    font-size: 0.9rem;
}
.btn-logout:hover { background: var(--red-light); color: var(--red); }

/* ===== MAIN CONTENT ===== */
.main-content {
    margin-left: var(--sidebar-w);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ===== TOPBAR ===== */
.topbar {
    height: 60px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    background: var(--bg-secondary);
    position: sticky; top: 0;
    z-index: 50;
}

.topbar-left { display: flex; align-items: center; gap: 16px; }

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.1rem;
    padding: 6px;
}

.page-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.topbar-right { display: flex; align-items: center; gap: 12px; }

.topbar-user {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ===== SECTIONS ===== */
.section { display: none; flex: 1; }
.section.active { display: block; }

.section-content {
    padding: 24px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.section-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.toolbar-left {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
}

/* ===== CARDS ===== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: var(--transition);
}

.card-header {
    margin-bottom: 20px;
}

.card-header h2 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 4px;
}
.card-header h2 i { color: var(--accent); }
.card-header p { font-size: 0.85rem; color: var(--text-secondary); }

/* ===== QUICK STYLES GRID ===== */
.quick-styles-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
}

.style-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 10px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    text-align: center;
    color: var(--text-primary);
    position: relative;
    overflow: hidden;
}

.style-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--accent-light);
    opacity: 0;
    transition: var(--transition);
}

.style-btn:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 4px 20px var(--accent-glow); }
.style-btn:hover::before { opacity: 1; }
.style-btn.active { border-color: var(--accent); background: var(--accent-light); box-shadow: 0 0 20px var(--accent-glow); }

.style-icon { font-size: 1.6rem; line-height: 1; }
.style-name { font-size: 0.85rem; font-weight: 700; }
.style-desc { font-size: 0.68rem; color: var(--text-secondary); line-height: 1.2; }

/* ===== GENERATOR FORM ===== */
.generator-form { display: flex; flex-direction: column; gap: 16px; }

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group { display: flex; flex-direction: column; gap: 8px; }

.form-group label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.form-group label i { color: var(--accent); }

.form-group input,
.form-group textarea,
.form-group select {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 11px 14px;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    transition: var(--transition);
    width: 100%;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group select option { background: var(--bg-card); }

.char-count {
    text-align: right;
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.style-select-row { display: flex; gap: 10px; }
.style-select-row select { flex: 1; }

.btn-generate {
    display: flex; align-items: center; justify-content: center; gap: 10px;
    background: linear-gradient(135deg, var(--accent), var(--purple));
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    padding: 15px 28px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
    align-self: flex-start;
    box-shadow: 0 4px 20px var(--accent-glow);
    letter-spacing: 0.3px;
}
.btn-generate:hover { transform: translateY(-2px); box-shadow: 0 8px 30px var(--accent-glow); }
.btn-generate:active { transform: translateY(0); }
.btn-generate.loading { opacity: 0.7; cursor: not-allowed; }
.btn-generate i { font-size: 1rem; }

/* ===== RESULT CARD ===== */
.result-info {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: flex-start;
    gap: 12px;
    flex-wrap: wrap;
}

.result-name {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text-primary);
    flex: 1;
}

.result-style-tag {
    background: var(--accent-light);
    color: var(--accent);
    border: 1px solid rgba(108, 99, 255, 0.3);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 700;
    flex-shrink: 0;
    white-space: nowrap;
}

.result-desc {
    width: 100%;
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.result-actions-top {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ===== PARAMS DISPLAY ===== */
.params-display {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.param-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.param-card::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--purple));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.param-card.animate::after { transform: scaleX(1); }

.param-label {
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 8px;
}

.param-value {
    font-size: 1.8rem;
    font-weight: 900;
    font-family: 'JetBrains Mono', monospace;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 4px;
}

.param-max {
    font-size: 0.68rem;
    color: var(--text-muted);
}

.param-bar {
    height: 3px;
    background: var(--bg-primary);
    border-radius: 2px;
    margin-top: 8px;
    overflow: hidden;
}
.param-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--purple));
    border-radius: 2px;
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== RESULT ACTIONS ===== */
.result-actions, .editor-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* ===== BUTTONS ===== */
.btn-primary {
    display: flex; align-items: center; gap: 8px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    padding: 11px 20px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 4px 16px var(--accent-glow); }

.btn-secondary {
    display: flex; align-items: center; gap: 8px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 11px 20px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-light); }

.btn-icon {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    width: 36px; height: 36px;
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.85rem;
}
.btn-icon:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-light); }

.btn-danger {
    display: flex; align-items: center; gap: 8px;
    background: var(--red-light);
    color: var(--red);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius-sm);
    padding: 9px 16px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
}
.btn-danger:hover { background: var(--red); color: white; }

/* ===== SEARCH & FILTER ===== */
.search-box {
    position: relative;
    flex: 1;
    max-width: 300px;
}
.search-box i {
    position: absolute; left: 12px; top: 50%; transform: translateY(-50%);
    color: var(--text-muted); font-size: 0.875rem;
}
.search-box input {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 14px 10px 36px;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 0.875rem;
    width: 100%;
    transition: var(--transition);
}
.search-box input:focus { outline: none; border-color: var(--accent); }
.search-box input::placeholder { color: var(--text-muted); }

#filter-style {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
}
#filter-style:focus { outline: none; border-color: var(--accent); }

/* ===== PRESETS GRID ===== */
.presets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.preset-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}
.preset-card:hover { border-color: var(--border-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.3); }

.preset-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 10px;
}

.preset-card-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    flex: 1;
    line-height: 1.3;
}

.preset-card-favorite {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    padding: 2px;
    transition: var(--transition);
    flex-shrink: 0;
}
.preset-card-favorite.active { color: var(--yellow); }
.preset-card-favorite:hover { color: var(--yellow); }

.preset-card-style {
    font-size: 0.72rem;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 20px;
    margin-bottom: 10px;
    display: inline-block;
}

.preset-card-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.preset-card-params {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 4px;
    margin-bottom: 14px;
}

.param-mini {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 4px 2px;
    text-align: center;
}
.param-mini-label { font-size: 0.55rem; color: var(--text-muted); text-transform: uppercase; line-height: 1; }
.param-mini-value { font-size: 0.8rem; font-weight: 700; font-family: 'JetBrains Mono', monospace; color: var(--text-primary); }

.preset-card-actions {
    display: flex;
    gap: 8px;
}

.btn-sm {
    display: flex; align-items: center; gap: 5px;
    padding: 7px 12px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
}
.btn-sm:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-light); }
.btn-sm.danger:hover { border-color: var(--red); color: var(--red); background: var(--red-light); }

/* ===== EDITOR PARAMS ===== */
.params-editor {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin: 24px 0;
}

.param-row {
    display: grid;
    grid-template-columns: 130px 1fr 90px;
    align-items: center;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
}
.param-row:last-child { border-bottom: none; }

.param-row-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.param-row-name { color: var(--text-primary); font-size: 0.9rem; }
.param-row-range { font-size: 0.72rem; color: var(--text-muted); }

.param-slider-wrap { display: flex; align-items: center; gap: 12px; }

.param-slider {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: var(--bg-primary);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
    transition: var(--transition);
}

.param-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px; height: 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--purple));
    cursor: pointer;
    border: 2px solid var(--bg-card);
    box-shadow: 0 0 10px var(--accent-glow);
    transition: var(--transition);
}
.param-slider::-webkit-slider-thumb:hover { transform: scale(1.2); }
.param-slider::-moz-range-thumb {
    width: 18px; height: 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--purple));
    cursor: pointer;
    border: 2px solid var(--bg-card);
    box-shadow: 0 0 10px var(--accent-glow);
}

.param-slider-track {
    flex: 1;
    position: relative;
    height: 6px;
}

.param-input-num {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 8px 10px;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    font-weight: 700;
    text-align: center;
    width: 70px;
    transition: var(--transition);
}
.param-input-num:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-light); }

.editor-meta { margin-bottom: 8px; }

/* ===== MODAL ===== */
.modal-overlay {
    position: fixed; inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex; align-items: center; justify-content: center;
    z-index: 200;
    opacity: 0; visibility: hidden;
    transition: var(--transition);
}
.modal-overlay.open { opacity: 1; visibility: visible; }

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 600px;
    max-height: 85vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 1rem; font-weight: 700; color: var(--text-primary); }

.modal-close {
    background: none; border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
    font-size: 1rem;
    transition: var(--transition);
}
.modal-close:hover { background: var(--border); color: var(--text-primary); }

.modal-body { padding: 24px; overflow-y: auto; flex: 1; }
.modal-footer { padding: 16px 24px; border-top: 1px solid var(--border); display: flex; gap: 10px; justify-content: flex-end; }

/* ===== LOADING STATE ===== */
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: var(--text-muted);
    gap: 12px;
    font-size: 0.9rem;
}
.loading-state i { font-size: 2rem; color: var(--accent); }

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: var(--text-muted);
    gap: 16px;
    text-align: center;
    grid-column: 1 / -1;
}
.empty-state i { font-size: 3rem; color: var(--text-muted); }
.empty-state h3 { font-size: 1.1rem; font-weight: 600; color: var(--text-secondary); }
.empty-state p { font-size: 0.85rem; max-width: 300px; }

/* ===== TOAST ===== */
.toast {
    position: fixed;
    bottom: 24px; right: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    padding: 14px 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 300;
    transform: translateY(80px);
    opacity: 0;
    transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.success { border-color: rgba(34, 197, 94, 0.4); }
.toast.success i { color: var(--green); }
.toast.error { border-color: rgba(239, 68, 68, 0.4); }
.toast.error i { color: var(--red); }
.toast.info { border-color: rgba(108, 99, 255, 0.4); }
.toast.info i { color: var(--accent); }

/* ===== LOADING OVERLAY ===== */
.loading-overlay {
    position: fixed; inset: 0;
    background: rgba(13, 15, 20, 0.9);
    backdrop-filter: blur(8px);
    display: flex; align-items: center; justify-content: center;
    z-index: 400;
    opacity: 0; visibility: hidden;
    transition: var(--transition);
}
.loading-overlay.show { opacity: 1; visibility: visible; }

.loading-content { text-align: center; }

.loading-guitar {
    font-size: 4rem;
    color: var(--accent);
    margin-bottom: 20px;
    animation: guitarPulse 1s ease-in-out infinite;
}
@keyframes guitarPulse {
    0%, 100% { transform: scale(1) rotate(-5deg); filter: drop-shadow(0 0 20px var(--accent-glow)); }
    50% { transform: scale(1.1) rotate(5deg); filter: drop-shadow(0 0 40px var(--accent-glow)); }
}

.loading-bars {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: 5px;
    height: 40px;
    margin-bottom: 16px;
}
.loading-bars span {
    width: 6px;
    background: linear-gradient(to top, var(--accent), var(--purple));
    border-radius: 3px;
    animation: bar 0.8s ease-in-out infinite;
}
.loading-bars span:nth-child(1) { animation-delay: 0s; }
.loading-bars span:nth-child(2) { animation-delay: 0.1s; }
.loading-bars span:nth-child(3) { animation-delay: 0.2s; }
.loading-bars span:nth-child(4) { animation-delay: 0.3s; }
.loading-bars span:nth-child(5) { animation-delay: 0.4s; }

@keyframes bar {
    0%, 100% { height: 8px; }
    50% { height: 36px; }
}

.loading-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===== STYLE COLOR TAGS ===== */
.style-tag-Clean { background: rgba(34, 197, 94, 0.15); color: #22c55e; border: 1px solid rgba(34, 197, 94, 0.25); }
.style-tag-Blues { background: rgba(59, 130, 246, 0.15); color: #60a5fa; border: 1px solid rgba(59, 130, 246, 0.25); }
.style-tag-Overdrive { background: rgba(249, 115, 22, 0.15); color: #fb923c; border: 1px solid rgba(249, 115, 22, 0.25); }
.style-tag-Metal { background: rgba(239, 68, 68, 0.15); color: #f87171; border: 1px solid rgba(239, 68, 68, 0.25); }
.style-tag-Jazz { background: rgba(234, 179, 8, 0.15); color: #fbbf24; border: 1px solid rgba(234, 179, 8, 0.25); }
.style-tag-Rock { background: rgba(168, 85, 247, 0.15); color: #c084fc; border: 1px solid rgba(168, 85, 247, 0.25); }
.style-tag-Country { background: rgba(245, 158, 11, 0.15); color: #f59e0b; border: 1px solid rgba(245, 158, 11, 0.25); }
.style-tag-Ambient { background: rgba(6, 182, 212, 0.15); color: #22d3ee; border: 1px solid rgba(6, 182, 212, 0.25); }
.style-tag-Worship { background: rgba(244, 114, 182, 0.15); color: #f472b6; border: 1px solid rgba(244, 114, 182, 0.25); }
.style-tag-Chorus { background: rgba(99, 102, 241, 0.15); color: #818cf8; border: 1px solid rgba(99, 102, 241, 0.25); }
.style-tag-Custom { background: rgba(148, 163, 184, 0.15); color: #94a3b8; border: 1px solid rgba(148, 163, 184, 0.25); }

/* ===== MODAL PARAMS GRID ===== */
.modal-params-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
    margin: 16px 0;
}

.modal-param-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 8px;
    text-align: center;
}
.modal-param-label { font-size: 0.65rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 6px; }
.modal-param-value { font-size: 1.5rem; font-weight: 800; font-family: 'JetBrains Mono', monospace; color: var(--text-primary); }
.modal-param-max { font-size: 0.65rem; color: var(--text-muted); }

/* ===== EXTRA POLISH ===== */
.param-card:hover {
    border-color: var(--border-light);
    background: var(--bg-card-hover);
}

.param-value {
    background: linear-gradient(135deg, var(--text-primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.preset-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--purple));
    border-radius: var(--radius) var(--radius) 0 0;
    opacity: 0;
    transition: var(--transition);
}
.preset-card:hover::after { opacity: 1; }

/* Glow on active style buttons */
.style-btn[data-style="Metal"].active { border-color: #f87171; box-shadow: 0 0 20px rgba(248,113,113,0.3); }
.style-btn[data-style="Blues"].active { border-color: #60a5fa; box-shadow: 0 0 20px rgba(96,165,250,0.3); }
.style-btn[data-style="Clean"].active { border-color: #22c55e; box-shadow: 0 0 20px rgba(34,197,94,0.3); }
.style-btn[data-style="Jazz"].active  { border-color: #fbbf24; box-shadow: 0 0 20px rgba(251,191,36,0.3); }
.style-btn[data-style="Rock"].active  { border-color: #c084fc; box-shadow: 0 0 20px rgba(192,132,252,0.3); }
.style-btn[data-style="Ambient"].active  { border-color: #22d3ee; box-shadow: 0 0 20px rgba(34,211,238,0.3); }
.style-btn[data-style="Worship"].active  { border-color: #f472b6; box-shadow: 0 0 20px rgba(244,114,182,0.3); }
.style-btn[data-style="Chorus"].active   { border-color: #818cf8; box-shadow: 0 0 20px rgba(129,140,248,0.3); }

/* Kbd shortcut hint */
.btn-generate::after {
    content: 'Ctrl+Enter';
    font-size: 0.65rem;
    opacity: 0.6;
    background: rgba(255,255,255,0.15);
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 4px;
    font-weight: 400;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1100px) {
    .quick-styles-grid { grid-template-columns: repeat(5, 1fr); }
    .params-display { grid-template-columns: repeat(5, 1fr); }
}

@media (max-width: 900px) {
    .quick-styles-grid { grid-template-columns: repeat(5, 1fr); }
    .params-display { grid-template-columns: repeat(5, 1fr); }
    .param-row { grid-template-columns: 100px 1fr 70px; }
}

@media (max-width: 768px) {
    .sidebar { transform: translateX(calc(-1 * var(--sidebar-w))); }
    .sidebar.open { transform: translateX(0); box-shadow: var(--shadow-lg); }
    .sidebar-toggle { display: block; }
    .mobile-menu-btn { display: block; }
    .main-content { margin-left: 0; }
    .quick-styles-grid { grid-template-columns: repeat(5, 1fr); }
    .params-display { grid-template-columns: repeat(5, 1fr); }
    .form-row { grid-template-columns: 1fr; }
    .section-content { padding: 16px; }
    .section-toolbar { flex-direction: column; align-items: stretch; }
    .toolbar-left { flex-wrap: wrap; }
}

@media (max-width: 480px) {
    .quick-styles-grid { grid-template-columns: repeat(2, 1fr); }
    .params-display { grid-template-columns: repeat(2, 1fr); }
    .modal-params-grid { grid-template-columns: repeat(2, 1fr); }
}