:root{--bg-primary: #0a0a0f;--bg-surface: #14141f;--bg-elevated: #1e1e2e;--bg-glass: rgba(20, 20, 31, .65);--bg-glass-hover: rgba(30, 30, 46, .75);--color-primary: #7c6ce6;--color-primary-soft: rgba(124, 108, 230, .15);--color-primary-glow: rgba(124, 108, 230, .35);--color-accent: #22d3a8;--color-accent-soft: rgba(34, 211, 168, .15);--color-gold: #d4a853;--color-gold-soft: rgba(212, 168, 83, .15);--color-warning: #f59e0b;--color-danger: #ef4444;--color-success: #10b981;--text-primary: #e8e8f0;--text-secondary: #8888a0;--text-muted: #55556a;--text-on-primary: #ffffff;--border: rgba(255, 255, 255, .08);--border-hover: rgba(255, 255, 255, .15);--border-active: rgba(124, 108, 230, .4);--font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;--font-display: "Playfair Display", Georgia, "Times New Roman", serif;--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--space-3xl: 64px;--radius-sm: 6px;--radius-md: 12px;--radius-lg: 20px;--radius-xl: 28px;--radius-full: 9999px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .5);--shadow-glow-primary: 0 0 20px rgba(124, 108, 230, .25);--shadow-glow-accent: 0 0 20px rgba(34, 211, 168, .25);--shadow-glow-gold: 0 0 20px rgba(212, 168, 83, .25);--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-base: .25s cubic-bezier(.4, 0, .2, 1);--transition-slow: .4s cubic-bezier(.4, 0, .2, 1);--transition-spring: .5s cubic-bezier(.34, 1.56, .64, 1);--sidebar-left-width: 280px;--sidebar-right-width: 320px;--header-height: 60px;--action-bar-height: 64px}[data-theme=light]{--bg-primary: #f5f3f0;--bg-surface: #ffffff;--bg-elevated: #fafaf8;--bg-glass: rgba(255, 255, 255, .75);--bg-glass-hover: rgba(255, 255, 255, .85);--text-primary: #1a1a2e;--text-secondary: #666680;--text-muted: #999aaa;--border: rgba(0, 0, 0, .08);--border-hover: rgba(0, 0, 0, .15);--shadow-sm: 0 1px 3px rgba(0, 0, 0, .08);--shadow-md: 0 4px 12px rgba(0, 0, 0, .1);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .12)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}body{font-family:var(--font-sans);background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh;overflow-x:hidden}#root{min-height:100vh}h1,h2,h3,h4,h5,h6{font-family:var(--font-sans);font-weight:600;line-height:1.3;color:var(--text-primary)}.display-font{font-family:var(--font-display)}.text-primary{color:var(--text-primary)}.text-secondary{color:var(--text-secondary)}.text-muted{color:var(--text-muted)}.text-brand{color:var(--color-primary)}.text-accent{color:var(--color-accent)}.text-gold{color:var(--color-gold)}a{color:var(--color-primary);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--color-accent)}.gcl-app{display:flex;flex-direction:column;min-height:100vh;background:var(--bg-primary);position:relative}.gcl-app:before{content:"";position:fixed;inset:0;background:radial-gradient(circle at 15% 25%,rgba(124,108,230,.04) 0%,transparent 50%),radial-gradient(circle at 85% 75%,rgba(34,211,168,.03) 0%,transparent 50%),radial-gradient(circle at 50% 50%,rgba(212,168,83,.02) 0%,transparent 50%);pointer-events:none;z-index:0}.gcl-header{height:var(--header-height);display:flex;align-items:center;justify-content:space-between;padding:0 var(--space-lg);background:var(--bg-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}.gcl-header__logo{display:flex;align-items:center;gap:var(--space-sm)}.gcl-header__logo-icon{width:32px;height:32px;background:linear-gradient(135deg,var(--color-primary),var(--color-accent));border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:18px}.gcl-header__title{font-family:var(--font-display);font-size:1.25rem;font-weight:600;background:linear-gradient(135deg,var(--text-primary),var(--color-primary));background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent}.gcl-header__actions{display:flex;align-items:center;gap:var(--space-sm)}.btn--header{padding:6px 16px;font-size:.78rem;border-radius:var(--radius-full)}.btn--header.btn--primary{background:linear-gradient(135deg,var(--color-primary),#6558d3);color:var(--text-on-primary);box-shadow:0 0 8px #7c6ce626}.btn--header.btn--primary:hover{box-shadow:0 0 16px #7c6ce659;transform:translateY(-1px)}.btn--header.btn--ghost{background:transparent;color:var(--text-secondary);border:1px solid var(--border)}.btn--header.btn--ghost:hover{border-color:var(--border-hover);color:var(--text-primary);background:var(--bg-glass-hover)}.theme-toggle{width:44px;height:24px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-full);position:relative;cursor:pointer;transition:background var(--transition-base)}.theme-toggle:after{content:"";position:absolute;top:2px;left:2px;width:18px;height:18px;border-radius:50%;background:var(--color-primary);transition:transform var(--transition-base)}[data-theme=light] .theme-toggle:after{transform:translate(20px);background:var(--color-gold)}.gcl-main{display:grid;grid-template-columns:var(--sidebar-left-width) 1fr;gap:var(--space-md);padding:var(--space-md);flex:1;position:relative;z-index:1;max-width:1400px;margin:0 auto;width:100%}.gcl-panel details>summary{list-style:none;display:flex;align-items:center;justify-content:space-between}.gcl-panel details>summary::-webkit-details-marker{display:none}.gcl-panel details>summary:after{content:"▼";font-size:.8rem;color:var(--text-muted);transition:transform .2s ease}.gcl-panel details[open]>summary:after{transform:rotate(180deg)}.gcl-panel{background:var(--bg-glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--space-lg);transition:border-color var(--transition-base),box-shadow var(--transition-base)}.gcl-panel:hover{border-color:var(--border-hover)}.gcl-panel__header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-lg)}.gcl-panel__title{font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--text-secondary)}.gcl-left-panel{display:flex;flex-direction:column;gap:var(--space-md);overflow-y:auto;max-height:calc(100vh - 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30px;color:var(--text-primary);font-family:var(--font-sans);font-size:.85rem;outline:none;transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.gem-search::placeholder{color:var(--text-muted)}.gem-search:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-soft)}.gem-category{margin-bottom:var(--space-md)}.gem-category__label{font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);margin-bottom:var(--space-sm);padding-left:var(--space-xs)}.gem-category__label--collapsible{cursor:pointer;display:flex;align-items:center;justify-content:space-between;padding-right:var(--space-xs);border-radius:var(--radius-sm);transition:color .2s ease;-webkit-user-select:none;user-select:none}.gem-category__label--collapsible:hover{color:var(--text-primary)}.gem-category__chevron{font-size:.65rem;transition:transform .25s 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rgba(255,255,255,.2)}.gem-chip--active .gem-chip__dot{box-shadow:0 0 6px currentColor}.quick-type-row{display:flex;flex-wrap:wrap;gap:6px}.param-group{margin-bottom:var(--space-md)}.param-group:last-child{margin-bottom:0}.param-label{display:flex;align-items:center;justify-content:space-between;font-size:.78rem;font-weight:500;color:var(--text-secondary);margin-bottom:var(--space-sm)}.param-value{font-weight:600;color:var(--text-primary);font-variant-numeric:tabular-nums}.param-tier{font-size:.7rem;font-weight:600;padding:2px 8px;border-radius:var(--radius-full);text-transform:uppercase;letter-spacing:.04em}.param-tier--poor{background:#ef444426;color:#f87171}.param-tier--fair{background:#f59e0b26;color:#fbbf24}.param-tier--good{background:#10b98126;color:#34d399}.param-tier--very-good{background:#22d3a826;color:#22d3a8}.param-tier--excellent{background:#7c6ce626;color:#a78bfa}.param-tier--exceptional{background:#d4a85326;color:#d4a853}.gcl-slider{-webkit-appearance:none;appearance:none;width:100%;height:6px;border-radius:var(--radius-full);background:var(--bg-elevated);outline:none;cursor:pointer;transition:background var(--transition-fast)}.gcl-slider::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:18px;height:18px;border-radius:50%;background:var(--color-primary);border:2px solid var(--bg-primary);box-shadow:0 0 8px #7c6ce666;cursor:pointer;transition:transform var(--transition-fast),box-shadow var(--transition-fast)}.gcl-slider::-webkit-slider-thumb:hover{transform:scale(1.2);box-shadow:0 0 14px #7c6ce699}.gcl-slider::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:var(--color-primary);border:2px solid var(--bg-primary);box-shadow:0 0 8px #7c6ce666;cursor:pointer;transition:transform var(--transition-fast),box-shadow var(--transition-fast)}.gcl-slider::-moz-range-thumb:hover{transform:scale(1.2)}.gcl-slider--carat{background:linear-gradient(to right,#555,var(--color-gold))}.gcl-slider--saturation{background:linear-gradient(to right,#666,var(--color-primary))}.gcl-slider--clarity{background:linear-gradient(to right,#ffffff1a,#ffffffb3)}.gcl-slider--cut{background:linear-gradient(to right,#555,var(--color-accent))}.gcl-slider--cci{background:linear-gradient(to right,#6B3C36 0%,#BC4E66 25%,#B82E46 50%,#9B1C31 75%,var(--color-gold) 100%)}.gcl-slider--luster{background:linear-gradient(to right,#2a2a3a,#4a5a7a,#7a9ad4 50%,#b8d4ff 80%,#fff)}.gcl-slider--crystal{background:linear-gradient(to right,#555,#8e7cc3,#81d4fa,#a5d6a7,#fff59d,#ef9a9a)}.gcl-select{width:100%;padding:8px 28px 8px 12px;background:var(--bg-elevated);border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:var(--text-primary);font-size:.85rem;font-family:inherit;cursor:pointer;transition:border-color .2s ease,box-shadow .2s ease;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23888'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;background-size:10px 6px}.gcl-select:hover{border-color:var(--color-primary)}.gcl-select:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 2px rgba(var(--color-primary-rgb, 99, 102, 241),.25)}.gcl-select option{background:var(--bg-base);color:var(--text-primary)}.toggle-switch{position:relative;display:inline-block;width:40px;height:22px;flex-shrink:0}.toggle-switch input{opacity:0;width:0;height:0}.toggle-switch__slider{position:absolute;cursor:pointer;inset:0;background:var(--bg-elevated);border:1px solid var(--border-subtle);border-radius:22px;transition:all .3s ease}.toggle-switch__slider:before{content:"";position:absolute;height:16px;width:16px;left:2px;bottom:2px;background:var(--text-muted);border-radius:50%;transition:all .3s ease}.toggle-switch input:checked+.toggle-switch__slider{background:var(--color-primary);border-color:var(--color-primary)}.toggle-switch input:checked+.toggle-switch__slider:before{transform:translate(18px);background:#fff}.asterism-section{border-top:1px solid var(--border-subtle);padding-top:var(--space-sm);margin-top:var(--space-sm)}.spectrum-bar{width:100%;height:40px;border-radius:var(--radius-md);border:1px solid var(--border);position:relative;overflow:hidden;cursor:pointer;transition:border-color var(--transition-fast)}.spectrum-bar:hover{border-color:var(--border-hover)}.spectrum-bar__indicator{position:absolute;top:0;width:3px;height:100%;background:#fff;box-shadow:0 0 6px #fffc;pointer-events:none;transition:left var(--transition-fast)}.spectrum-bar__label{position:absolute;bottom:-22px;left:50%;transform:translate(-50%);font-size:.7rem;color:var(--text-secondary);white-space:nowrap}.dual-spectrum{display:grid;grid-template-columns:1fr 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var(--transition-spring)}.valuation-card__price:hover{transform:scale(1.02)}.valuation-card__per-carat{font-size:.85rem;color:var(--text-secondary);margin-top:var(--space-xs)}.price-breakdown{margin-top:var(--space-lg);border-top:1px solid var(--border);padding-top:var(--space-md)}.price-breakdown__row{display:flex;justify-content:space-between;align-items:center;padding:var(--space-xs) 0;font-size:.8rem}.price-breakdown__label{color:var(--text-secondary)}.price-breakdown__value{color:var(--text-primary);font-weight:600;font-variant-numeric:tabular-nums}.price-breakdown__multiplier{font-size:.7rem;color:var(--text-muted);padding:1px 6px;background:var(--bg-elevated);border-radius:var(--radius-sm);margin-left:var(--space-xs)}.confidence-gauge{display:flex;align-items:center;gap:var(--space-sm);margin-top:var(--space-md);padding:var(--space-sm) var(--space-md);background:var(--bg-elevated);border-radius:var(--radius-md)}.confidence-gauge__bar{flex:1;height:4px;background:var(--bg-primary);border-radius:var(--radius-full);overflow:hidden}.confidence-gauge__fill{height:100%;border-radius:var(--radius-full);background:linear-gradient(to right,var(--color-danger),var(--color-warning),var(--color-success));transition:width var(--transition-slow)}.confidence-gauge__label{font-size:.7rem;font-weight:600;color:var(--text-secondary);min-width:32px;text-align:right}.gcl-action-bar{display:flex;align-items:center;justify-content:center;gap:var(--space-md);padding:var(--space-md) var(--space-lg);background:var(--bg-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-top:1px solid var(--border);position:sticky;bottom:0;z-index:100}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:10px 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