:root {
    --lens-bg: #1e293b;
    --lens-panel: rgba(30, 41, 59, 0.95);
    --lens-highlight: #3b82f6;
    --lens-highlight-soft: rgba(59, 130, 246, 0.25);
    --lens-text: #ffffff;
    --lens-muted: rgba(226, 232, 240, 0.9);
    --lens-danger: #ef4444;
}

.lens-help {
    margin-top: 0;
    padding: 0.3rem;
    background: rgba(15, 23, 42, 0.8);
    border-radius: 4px;
    border: 1px solid rgba(148, 163, 184, 0.3);
    font-size: 0.8rem;
}

.lens-help summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--lens-highlight);
}

.lens-help ul {
    margin: 0.5rem 0 0;
    padding-left: 1.5rem;
    color: var(--lens-text);
    line-height: 1.6;
}

.lens-presets {
    margin-top: 0.5rem;
}

.lens-presets h3 {
    margin: 0 0 0.3rem;
    font-size: 0.85rem;
    color: var(--lens-text);
}

.lens-presets button {
    margin-right: 0.3rem;
    margin-bottom: 0.3rem;
    padding: 0.3rem 0.8rem;
    font-size: 0.8rem;
}

body.lens-page {
    margin: 0;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 50%, #020617 100%);
    color: #f1f5f9;
    display: flex;
    flex-direction: column;
}

.lens-header {
    padding: 4px 8px;
    text-align: center;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--lens-panel);
    border-bottom: 1px solid rgba(148, 163, 184, 0.2);
    position: sticky;
    top: 0;
    z-index: 10;
}

.lens-header h1 {
    margin: 0;
    font-size: 1.2rem;
    letter-spacing: 0.04em;
}

.lens-header p {
    margin: 0.1rem 0 0;
    max-width: none;
    line-height: 1.2;
    color: var(--lens-muted);
    font-size: 0.8rem;
}

.lens-header .lens-nav-left {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.lens-header .lens-nav-center {
    flex: 1;
    text-align: center;
}

.lens-header .lens-nav-right {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.lens-header .lens-actions {
    margin-top: 1.4rem;
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.lens-btn {
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.85), rgba(14, 165, 233, 0.9));
    border: none;
    color: #0f172a;
    font-weight: 600;
    padding: 0.6rem 1.6rem;
    border-radius: 999px;
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.18s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    box-shadow: 0 12px 32px rgba(14, 165, 233, 0.35);
}

.lens-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 36px rgba(14, 165, 233, 0.4);
}

.lens-btn, .lens-secondary {
    font-size: 0.8rem;
    padding: 0.3rem 0.6rem;
}

.lens-layout {
    display: grid;
    gap: 8px;
    grid-template-columns: minmax(0, 1fr) minmax(220px, 280px);
    padding: 0 12px 12px;
    align-items: start;
}

.lens-canvas-panel {
    background: var(--lens-panel);
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 8px;
    padding: 8px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.4);
    position: relative;
    overflow: hidden;
}

.lens-canvas-panel header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    gap: 0.75rem;
}

.lens-canvas-panel header h2 {
    margin: 0;
    font-size: 1.25rem;
    letter-spacing: 0.02em;
}

.lens-canvas-panel header span {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.9rem;
    color: var(--lens-muted);
}

#lensCanvas {
    width: 100%;
    max-width: 100%;
    aspect-ratio: 3 / 1;
    background: radial-gradient(circle at center, rgba(15, 23, 42, 0.9), rgba(2, 6, 23, 0.9));
    border: 1px solid rgba(148, 163, 184, 0.25);
    border-radius: 6px;
}

.lens-controls {
    background: rgba(2, 6, 23, 0.82);
    border: 1px solid rgba(148, 163, 184, 0.18);
    border-radius: 8px;
    padding: 6px;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.4);
}

.lens-control-group {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.lens-control-group label {
    font-weight: 600;
    letter-spacing: 0.02em;
    font-size: 0.85rem;
}

.lens-control-group input[type="range"] {
    width: 100%;
}

.lens-control-group input,
.lens-control-group select {
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    border: 1px solid rgba(148, 163, 184, 0.35);
    background: rgba(15, 23, 42, 0.65);
    color: var(--lens-text);
    font-size: 0.8rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.lens-control-group input:focus,
.lens-control-group select:focus {
    outline: none;
    border-color: var(--lens-highlight);
    box-shadow: 0 0 0 3px var(--lens-highlight-soft);
}

.lens-control-group .lens-value {
    font-size: 0.75rem;
    color: var(--lens-muted);
}

.lens-results {
    margin-top: 0.5rem;
    padding: 0.5rem;
    background: rgba(2, 6, 23, 0.7);
    border-radius: 6px;
    border: 1px solid rgba(148, 163, 184, 0.15);
    display: grid;
    gap: 0.3rem;
}

.lens-results h2 {
    margin: 0 0 0.3rem;
    font-size: 0.9rem;
}

.lens-results .lens-grid {
    display: grid;
    gap: 0.3rem;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
}

.lens-result-card {
    background: rgba(8, 12, 27, 0.8);
    border-radius: 4px;
    padding: 0.3rem 0.4rem;
    border: 1px solid rgba(148, 163, 184, 0.18);
}

.lens-result-card h3 {
    margin: 0 0 0.4rem;
    font-size: 0.95rem;
    letter-spacing: 0.02em;
}

.lens-result-card p {
    margin: 0;
    font-size: 0.88rem;
    color: var(--lens-muted);
}

.lens-alert {
    margin-top: 0.35rem;
    padding: 0.65rem 0.75rem;
    border-left: 4px solid var(--lens-danger);
    background: rgba(248, 113, 113, 0.12);
    color: #fee2e2;
    border-radius: 10px;
    display: none;
}

.lens-alert[aria-hidden="false"] {
    display: block;
}

.lens-secondary {
    background: transparent;
    border: 1px solid rgba(148, 163, 184, 0.35);
    color: var(--lens-text);
    padding: 0.55rem 1.4rem;
    border-radius: 999px;
    cursor: pointer;
    transition: border-color 0.18s ease, transform 0.18s ease;
}

.lens-secondary:hover {
    border-color: var(--lens-highlight);
    transform: translateY(-1px);
}

.lens-helper {
    font-size: 0.8rem;
    color: var(--lens-muted);
    line-height: 1.4;
    margin-top: 0.3rem;
}

@media (max-width: 1024px) {
    .lens-layout {
        grid-template-columns: 1fr;
    }

    .lens-controls {
        order: -1;
        position: sticky;
        top: 4px;
        z-index: 5;
    }
}

@media (max-width: 720px) {
    .lens-layout {
        padding-left: 8px;
        padding-right: 8px;
    }

    .lens-canvas-panel,
    .lens-controls,
    .lens-results {
        padding: 6px;
    }

    .lens-header {
        padding-left: 8px;
        padding-right: 8px;
    }

    #lensCanvas {
        aspect-ratio: 3 / 1;
    }
}