:root{--color-primary: #2563eb;--color-primary-dark: #1d4ed8;--color-primary-light: #3b82f6;--color-surface: #ffffff;--color-surface-elevated: #f8fafc;--color-surface-overlay: rgba(255, 255, 255, .95);--color-border: #e2e8f0;--color-border-light: #f1f5f9;--color-text: #1e293b;--color-text-secondary: #64748b;--color-text-muted: #94a3b8;--color-success: #22c55e;--color-warning: #f59e0b;--color-error: #ef4444;--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--touch-target-min: 44px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04);--shadow-sheet: 0 -4px 20px rgba(0, 0, 0, .1);--safe-area-top: env(safe-area-inset-top, 0px);--safe-area-bottom: env(safe-area-inset-bottom, 0px);--safe-area-left: env(safe-area-inset-left, 0px);--safe-area-right: env(safe-area-inset-right, 0px);--z-canvas: 1;--z-ui: 10;--z-toolbar: 20;--z-panel: 25;--z-modal: 30;--z-overlay: 40;--z-toast: 50;--transition-fast: .15s ease;--transition-normal: .2s ease;--transition-slow: .3s ease-out;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-weight-normal: 400;--font-weight-medium: 500;--font-weight-semibold: 600;--font-weight-bold: 700}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{width:100%;height:100%;overflow:hidden;font-family:var(--font-family);font-size:var(--font-size-base);color:var(--color-text);background-color:var(--color-surface);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{overscroll-behavior:none;touch-action:none;-webkit-touch-callout:none;-webkit-user-select:none;user-select:none}*{-webkit-tap-highlight-color:transparent}input,textarea{-webkit-user-select:text;user-select:text}button{font-family:inherit;font-size:inherit;cursor:pointer;border:none;background:none;color:inherit}button:disabled{cursor:not-allowed;opacity:.5}:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.touch-btn{display:flex;align-items:center;justify-content:center;min-width:var(--touch-target-min);min-height:var(--touch-target-min);padding:var(--space-sm) var(--space-md);border-radius:var(--radius-md);transition:background-color var(--transition-fast),transform var(--transition-fast)}.touch-btn:active{transform:scale(.95)}.btn-primary{background-color:var(--color-primary);color:#fff}.btn-primary:hover,.btn-primary:active{background-color:var(--color-primary-dark)}.btn-secondary{background-color:var(--color-surface-elevated);border:1px solid var(--color-border)}.btn-secondary:hover{background-color:var(--color-border-light)}.btn-icon{width:var(--touch-target-min);height:var(--touch-target-min);padding:var(--space-sm);border-radius:var(--radius-md);color:var(--color-text-secondary)}.btn-icon:hover{background-color:var(--color-surface-elevated);color:var(--color-text)}.btn-icon svg{width:24px;height:24px}.input{width:100%;padding:var(--space-sm) var(--space-md);font-size:var(--font-size-base);border:1px solid var(--color-border);border-radius:var(--radius-md);background-color:var(--color-surface);color:var(--color-text);transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #2563eb1a}.range-slider{width:100%;height:6px;background:var(--color-border);border-radius:var(--radius-full);outline:none;-webkit-appearance:none;appearance:none}.range-slider::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;background:var(--color-primary);border-radius:50%;cursor:pointer;transition:transform var(--transition-fast)}.range-slider::-webkit-slider-thumb:active{transform:scale(1.2)}.range-slider::-moz-range-thumb{width:20px;height:20px;background:var(--color-primary);border:none;border-radius:50%;cursor:pointer}.panel{background:var(--color-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:var(--space-md)}.spinner{width:24px;height:24px;border:2px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.sheet-handle{width:32px;height:4px;background:var(--color-border);border-radius:var(--radius-full);margin:var(--space-sm) auto}@media(min-width:768px){:root{--space-md: 1.25rem;--space-lg: 2rem}}@media(min-width:1024px){:root{--space-md: 1.5rem;--space-lg: 2.5rem}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}