.plunge-calculator-page .hero{background:var(--bg-hero);padding:var(--space-3xl) var(--space-md) var(--space-2xl);text-align:center;position:relative;overflow:hidden;width:100vw;margin-left:calc(-50vw + 50%)}.plunge-calculator-page .hero:after{content:"";position:absolute;bottom:0;left:0;right:0;height:80px;background:linear-gradient(to top,var(--bg-primary),transparent);pointer-events:none}.plunge-calculator-page .hero-content-wrap{position:relative;z-index:1;max-width:720px;margin:0 auto}.plunge-calculator-page .hero h1{font-size:clamp(1.8rem,4vw,2.8rem);font-weight:800;color:#fff;margin-bottom:var(--space-sm);letter-spacing:-.03em}.plunge-calculator-page .hero p{font-size:clamp(1rem,2vw,1.15rem);color:#ffffffdb;max-width:640px;margin:0 auto}.plunge-calculator-page .hero-tip{display:inline-flex;align-items:flex-start;gap:var(--space-sm);margin-top:var(--space-lg);padding:var(--space-sm) var(--space-md);background:#ffffff1f;backdrop-filter:blur(8px);border-radius:var(--radius-full);color:#ffffffeb;font-size:.85rem;border:1px solid rgba(255,255,255,.15);text-align:left}.plunge-calculator-page .plunge-shape-toggle{display:flex;gap:0;background:var(--bg-secondary, #f1f5f9);border-radius:var(--radius-full, 9999px);padding:3px;margin:var(--space-sm) auto;max-width:380px}.plunge-calculator-page .plunge-shape-toggle button{flex:1;padding:8px 14px;border:none;border-radius:var(--radius-full, 9999px);background:transparent;font-size:.82rem;font-weight:600;color:var(--text-muted, #64748b);cursor:pointer;transition:all .2s ease;white-space:nowrap}.plunge-calculator-page .plunge-shape-toggle button.active{background:var(--color-primary, #0ea5e9);color:#fff;box-shadow:0 1px 3px #0000001f}[data-theme=dark] .plunge-calculator-page .plunge-shape-toggle{background:var(--bg-secondary, #1e293b)}.plunge-calculator-page .plunge-diagram{min-height:240px;padding:var(--space-md) var(--space-lg) var(--space-sm);display:flex;justify-content:center;align-items:center}.plunge-calculator-page .plunge-diagram svg{width:100%;max-width:clamp(300px,84vw,500px);height:auto}.plunge-calculator-page .plunge-diagram .pool-shape-fill{fill:#e8f4fd;stroke:#2563eb;stroke-width:2}[data-theme=dark] .plunge-calculator-page .plunge-diagram .pool-shape-fill{fill:#1f262e;stroke:#2e8ab8}.plunge-calculator-page .tooltip-trigger{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;padding:0;border:none;background:none;color:#2563eb;font-size:14px;cursor:pointer;border-radius:50%;vertical-align:middle;margin-left:4px;transition:color .15s ease;line-height:1}.plunge-calculator-page .tooltip-trigger:hover,.plunge-calculator-page .tooltip-trigger:focus{color:#1d4ed8;outline:2px solid #2563EB;outline-offset:1px}.plunge-calculator-page .tooltip-card{position:absolute;z-index:100;max-width:240px;padding:10px 14px;background:#fff;color:#334155;font-size:13px;line-height:1.45;border-radius:8px;box-shadow:0 4px 12px #00000026;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .15s ease,visibility .15s ease}.plunge-calculator-page .tooltip-card.visible{opacity:1;visibility:visible;pointer-events:auto}.plunge-calculator-page .tooltip-card .tooltip-arrow{position:absolute;bottom:-6px;left:20px;width:12px;height:12px;background:#fff;transform:rotate(45deg);box-shadow:2px 2px 4px #0000000f}.plunge-calculator-page .tooltip-card.below .tooltip-arrow{top:-6px;bottom:auto;box-shadow:-2px -2px 4px #0000000f}[data-theme=dark] .plunge-calculator-page .tooltip-card{background:#252b37;color:#c2ccd6;box-shadow:0 4px 12px #0006}[data-theme=dark] .plunge-calculator-page .tooltip-card .tooltip-arrow{background:#252b37}[data-theme=dark] .plunge-calculator-page .tooltip-trigger{color:#3c8cdd}.plunge-calculator-page .plunge-surface-area-chip{display:flex;align-items:center;justify-content:center;padding:8px 14px;margin:8px 0;background:var(--color-input-disabled-bg, #f0f4f8);border:1px solid var(--border-color);border-radius:var(--radius-sm);font-size:.82rem;font-weight:600;color:var(--color-input-disabled-text, #64748b)}[data-theme=dark] .plunge-calculator-page .plunge-surface-area-chip{background:#252e37;color:#98a6b3}.plunge-calculator-page .validation-area{display:flex;flex-direction:column;gap:6px;padding:0 var(--space-lg);margin-bottom:var(--space-sm)}.plunge-calculator-page .validation-msg{display:flex;align-items:flex-start;gap:6px;padding:8px 12px;border-radius:var(--radius-sm);font-size:.78rem;font-weight:500;line-height:1.45}.plunge-calculator-page .validation-error{background:#fceeee;border:1px solid hsl(0,50%,82%);color:#862d2d}.plunge-calculator-page .validation-warning{background:#fcf7e8;border:1px solid hsl(45,60%,82%);color:#7d5f36}.plunge-calculator-page .validation-info,.plunge-calculator-page .validation-note{background:#f0f5fa;border:1px solid hsl(210,40%,88%);color:#4b6b8b}[data-theme=dark] .plunge-calculator-page .validation-error{background:#2e1919;border-color:#462a2a;color:#c98282}[data-theme=dark] .plunge-calculator-page .validation-warning{background:#2e2919;border-color:#463f2a;color:#bcb18f}[data-theme=dark] .plunge-calculator-page .validation-info,[data-theme=dark] .plunge-calculator-page .validation-note{background:#19242e;border-color:#2a3846;color:#8fa6bc}.plunge-calculator-page .hidden{display:none!important}.plunge-calculator-page .plunge-single-group{grid-template-columns:1fr}.plunge-calculator-page .left-column-stack{display:flex;flex-direction:column;gap:var(--space-md);min-width:0}.plunge-calculator-page .field{position:relative}.plunge-calculator-page .advanced-section{padding:0}.plunge-calculator-page .advanced-section .input-panel{width:100%}.plunge-calculator-page .advanced-input-fields{padding-top:var(--space-md)}.plunge-calculator-page .results-meta{margin-top:var(--space-md);padding-top:var(--space-sm);border-top:1px solid rgba(255,255,255,.15);display:flex;flex-direction:column;gap:4px;text-align:left}.plunge-calculator-page .results-meta-line{font-size:.72rem;font-weight:600;color:#fffc;letter-spacing:.02em;line-height:1.4}@media(max-width:640px){.plunge-calculator-page .plunge-diagram{min-height:200px;padding:var(--space-sm) var(--space-md)}.plunge-calculator-page .plunge-diagram svg{max-width:360px}.plunge-calculator-page .plunge-shape-toggle{max-width:100%}.plunge-calculator-page .plunge-shape-toggle button{font-size:.75rem;padding:7px 10px}}@media(max-width:480px){.plunge-calculator-page .input-group{grid-template-columns:1fr}}