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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --bg-color: #0f172a;
    --bg-card: #1e293b;
    --bg-hover: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --border-color: #334155;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 18px 60px rgba(0,0,0,.55);
    --ring: 0 0 0 3px rgba(37, 99, 235, 0.18);
    --radius: 14px;
    --radius-sm: 10px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 18px;
    line-height: 1.6;
}

.sr-only {
    position: absolute !important;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.muted { color: var(--text-secondary); }
.small { font-size: .9rem; }
kbd {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: .85em;
    padding: 2px 8px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.6);
    color: var(--text-primary);
}

.app {
    max-width: 1280px;
    margin: 0 auto;
}

.app-header {
    display: grid;
    grid-template-columns: 1.1fr 1.5fr 1fr;
    gap: 16px;
    align-items: start;
    padding: 22px;
    border: 1px solid var(--border-color);
    background: rgba(30, 41, 59, 0.65);
    backdrop-filter: blur(10px);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 16px;
}

.brand-title {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-mark {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.7);
}

.brand h1 {
    font-size: 1.65rem;
    line-height: 1.2;
    background: linear-gradient(135deg, #93c5fd 0%, #3b82f6 60%, #60a5fa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.header-search input[type="text"] {
    width: 100%;
}

.quick-chips {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.chip {
    border: 1px solid var(--border-color);
    background: rgba(51, 65, 85, 0.55);
    color: var(--text-primary);
    padding: 6px 10px;
    border-radius: 999px;
    cursor: pointer;
    transition: all .15s;
    font-weight: 600;
    font-size: .9rem;
}
.chip:hover { border-color: #60a5fa; background: rgba(37, 99, 235, 0.18); }

.header-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    flex-wrap: wrap;
}

.toggle {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.5);
    user-select: none;
}
.toggle input { accent-color: var(--primary-color); }

.app-body {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 16px;
    align-items: start;
}

.sidebar { position: sticky; top: 16px; }
.panel {
    background: rgba(30, 41, 59, 0.72);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 18px;
    box-shadow: var(--shadow);
}
.panel-title {
    font-size: 1.05rem;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--text-secondary);
    letter-spacing: .06em;
    text-transform: uppercase;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

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

.form-group label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input,
.form-group select {
    padding: 12px 16px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.2s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--ring);
}

.form-group input::placeholder {
    color: var(--text-secondary);
}

.btn-primary,
.btn-secondary {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

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

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

.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: rgba(51, 65, 85, 0.55);
    color: var(--text-primary);
    cursor: pointer;
    transition: all .15s;
    display: grid;
    place-items: center;
    font-size: 1.1rem;
}
.icon-btn:hover { border-color: #60a5fa; background: rgba(37, 99, 235, 0.18); }

.content {
    min-width: 0;
}

.toolbar {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    padding: 16px 18px;
    border: 1px solid var(--border-color);
    background: rgba(30, 41, 59, 0.72);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 12px;
}
.results-count {
    font-size: 1.05rem;
    font-weight: 800;
}
.active-filters {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 8px;
}
.filter-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.45);
    color: var(--text-primary);
    font-weight: 600;
    font-size: .9rem;
}
.pill-x {
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    padding: 0 4px;
}
.pill-x:hover { color: var(--text-primary); }

.segmented {
    display: inline-flex;
    border: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.5);
    border-radius: 999px;
    overflow: hidden;
}
.segmented-btn {
    padding: 10px 12px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-weight: 800;
    letter-spacing: .02em;
}
.segmented-btn.is-active {
    color: white;
    background: rgba(37, 99, 235, 0.25);
}

.loading {
    text-align: center;
    padding: 40px;
}

.spinner {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger-color);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 20px;
    color: var(--danger-color);
}

.results {
    margin-top: 30px;
}

.products-list {
    display: grid;
    gap: 20px;
}

.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    transition: all 0.2s;
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    border-color: var(--primary-color);
}

.product-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 10px;
}

.product-symbol {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
}

.product-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.badge-long {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.badge-short {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
}

.badge-knockout {
    background: rgba(37, 99, 235, 0.2);
    color: #60a5fa;
    border: 1px solid #60a5fa;
}

.badge-certificate {
    background: rgba(139, 92, 246, 0.2);
    color: #a78bfa;
    border: 1px solid #a78bfa;
}

.product-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.detail-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.detail-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.detail-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.price-value {
    color: var(--success-color);
}

.leverage-value {
    color: #60a5fa;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.pagination button {
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s;
}

.pagination button:hover:not(:disabled) {
    background: var(--bg-hover);
    border-color: var(--primary-color);
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination .page-info {
    padding: 8px 16px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
}

.multiselect {
    border: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.55);
    border-radius: 12px;
    padding: 10px;
}
.multiselect input[type="text"] {
    width: 100%;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.85);
    color: var(--text-primary);
}
.multiselect-selected {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 10px;
}
.tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid rgba(96, 165, 250, 0.55);
    background: rgba(37, 99, 235, 0.15);
    color: #bfdbfe;
    font-weight: 700;
    font-size: .9rem;
}
.tag button {
    border: none;
    background: transparent;
    color: #93c5fd;
    cursor: pointer;
    font-size: 1.05rem;
    line-height: 1;
}
.tag button:hover { color: white; }

.multiselect-list {
    margin-top: 10px;
    max-height: 220px;
    overflow: auto;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.4);
}
.option {
    padding: 10px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    border-bottom: 1px solid rgba(51, 65, 85, 0.6);
}
.option:last-child { border-bottom: none; }
.option:hover { background: rgba(51, 65, 85, 0.5); }
.option.is-selected {
    background: rgba(37, 99, 235, 0.18);
    border-bottom-color: rgba(37, 99, 235, 0.25);
}
.option small { color: var(--text-secondary); }

.checklist {
    display: grid;
    gap: 8px;
    padding: 10px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.55);
    max-height: 220px;
    overflow: auto;
}
.check {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border-radius: 10px;
    border: 1px solid rgba(51, 65, 85, 0.6);
    background: rgba(15, 23, 42, 0.35);
}
.check:hover { border-color: #60a5fa; }
.check input { accent-color: var(--primary-color); }
.check span { font-weight: 700; }

.modal {
    position: fixed;
    inset: 0;
    display: grid;
    place-items: center;
    z-index: 50;
}
.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(2, 6, 23, 0.65);
    backdrop-filter: blur(6px);
}
.modal-card {
    position: relative;
    width: min(920px, calc(100vw - 24px));
    max-height: min(86vh, 820px);
    overflow: hidden;
    border-radius: 18px;
    border: 1px solid var(--border-color);
    background: rgba(30, 41, 59, 0.92);
    box-shadow: var(--shadow-lg);
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    padding: 16px 16px 12px;
    border-bottom: 1px solid rgba(51, 65, 85, 0.7);
}
.modal-title { font-size: 1.15rem; font-weight: 900; }
.modal-subtitle { margin-top: 4px; }
.modal-body {
    padding: 16px;
    overflow: auto;
    max-height: calc(86vh - 72px);
}

.details-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}
.details-item {
    border: 1px solid rgba(51, 65, 85, 0.7);
    background: rgba(15, 23, 42, 0.35);
    border-radius: 14px;
    padding: 12px;
}
.details-item .k { color: var(--text-secondary); font-size: .85rem; text-transform: uppercase; letter-spacing: .06em; }
.details-item .v { margin-top: 6px; font-weight: 800; overflow-wrap: anywhere; }

.actions-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 14px;
}

.hidden {
    display: none;
}

@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }

    .product-header {
        flex-direction: column;
    }

    .product-details {
        grid-template-columns: 1fr;
    }

    .app-header {
        grid-template-columns: 1fr;
    }

    .app-body {
        grid-template-columns: 1fr;
    }

    .sidebar { position: static; }

    .details-grid {
        grid-template-columns: 1fr;
    }
}