:root,[data-theme=light]{--safe-top: env(safe-area-inset-top, 0px);--safe-right: env(safe-area-inset-right, 0px);--safe-bottom: env(safe-area-inset-bottom, 0px);--safe-left: env(safe-area-inset-left, 0px);--bg: #f2f4f6;--surface: #ffffff;--surface-alt: #eef1f5;--surface-elevated: #ffffff;--text: #1c1e22;--text-muted: #5c6370;--accent: #0071e3;--accent-hover: #0077ed;--accent-pressed: #006edb;--accent-soft: rgba(0, 113, 227, .12);--success: #34c759;--success-soft: rgba(52, 199, 89, .12);--error: #ff3b30;--error-soft: rgba(255, 59, 48, .12);--border: #d2d5da;--border-subtle: #e8eaed;--card-bg: #faf8f5;--card-border: #2d3748;--card-shadow: 0 1px 3px rgba(0,0,0,.06), 0 4px 12px rgba(0,0,0,.04);--elevation-1: 0 1px 2px rgba(0,0,0,.04), 0 2px 6px rgba(0,0,0,.04);--elevation-2: 0 2px 4px rgba(0,0,0,.06), 0 8px 24px rgba(0,0,0,.06);--elevation-3: 0 4px 8px rgba(0,0,0,.08), 0 16px 48px rgba(0,0,0,.08);--touch-min: 44px;--radius: 10px;--radius-lg: 14px;--radius-xl: 20px;--radius-full: 9999px;--ease-out-expo: cubic-bezier(.16, 1, .3, 1);--ease-out-quart: cubic-bezier(.25, .46, .45, .94);--ease-spring: cubic-bezier(.34, 1.56, .64, 1);--transition: .25s var(--ease-out-quart);--transition-fast: .2s var(--ease-out-quart);--transition-spring: .4s var(--ease-spring);--anim-slide-in: slideInFade .35s var(--ease-out-quart);--anim-fade-in: fadeIn .4s var(--ease-out-quart);--anim-fade-in-up: fadeInUp .5s var(--ease-out-quart);--text-page-title: clamp(1.5rem, 4vw + 1rem, 2rem);--text-display-title: clamp(1.65rem, 4.5vw + 1.1rem, 2.35rem);--text-card-title: clamp(1.05rem, 2vw + .9rem, 1.25rem);--text-body: clamp(.9375rem, 1vw + .85rem, 1rem);--text-small: clamp(.8125rem, .5vw + .75rem, .875rem);--text-tiny: clamp(.7rem, .3vw + .65rem, .75rem);--space-page: clamp(1rem, 4vw, 1.75rem);--space-section: clamp(.75rem, 2vw, 1.25rem);--space-touch: max(.75rem, 3vw);font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,SF Pro Display,Segoe 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#0071e3}.flashcard-back-callout-title{display:block;font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:#2b6cb0;margin-bottom:.35rem}.flashcard-back-callout-text{margin:0;font-size:.875rem;line-height:1.5;color:#1a202c}.flashcards-below-card{margin-top:1rem;display:flex;flex-direction:column;gap:1rem}.flashcards-nav{display:flex;align-items:center;justify-content:center;gap:.75rem 1.25rem;flex-wrap:nowrap}.flashcards-nav .btn{min-width:5rem;padding:.6rem 1rem;font-weight:600;flex-shrink:0}.flashcards-counter{font-weight:600;font-size:.9375rem;min-width:4.5rem;text-align:center;color:var(--text)}.flashcard-fullscreen-overlay{position:fixed;top:0;right:0;bottom:0;left:0;padding:var(--safe-top) var(--safe-right) var(--safe-bottom) var(--safe-left);background:#000000eb;z-index:9999;display:flex;align-items:stretch;justify-content:center;overflow:hidden;-webkit-overflow-scrolling:touch;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}.flashcard-fullscreen-close-icon{position:absolute;top:max(.5rem,var(--safe-top));right:max(.5rem,var(--safe-right));z-index:10000;width:2.75rem;height:2.75rem;padding:0;border:none;border-radius:50%;background:#fff3;color:#fff;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);transition:background .2s,transform .2s}.flashcard-fullscreen-close-icon:hover{background:#ffffff59}.flashcard-fullscreen-close-icon:active{transform:scale(.94)}.flashcard-fullscreen-content{padding:.5rem .75rem .75rem;width:100%;max-width:100%;flex:1;min-height:0;display:flex;flex-direction:column;align-items:stretch;gap:.75rem;background:transparent;touch-action:pan-y;overflow:visible}.flashcard-fullscreen-card-swipe{width:100%;flex:1;min-height:0;display:flex;justify-content:center;align-items:stretch;transition:transform .25s var(--ease-out-expo);touch-action:pan-y;-webkit-user-select:none;user-select:none;overflow:visible}@media (min-width: 768px){.flashcard-fullscreen-overlay{padding:1.5rem;align-items:center}.flashcard-fullscreen-content{padding:clamp(1rem,4vw,2rem);width:min(92vw,64rem);max-width:64rem;flex:none;min-height:min(88vh,88dvh);max-height:calc(100dvh - 2rem);background:#1c1c20a6;-webkit-backdrop-filter:saturate(180%) blur(24px);backdrop-filter:saturate(180%) blur(24px);border-radius:24px;border:1px solid rgba(255,255,255,.14);box-shadow:0 30px 80px #00000080;gap:1.5rem}.flashcard-fullscreen-card-swipe{flex:1 1 auto}}.flashcard-wrapper--fullscreen{width:100%;min-width:0;flex:1;min-height:0;display:flex;flex-direction:column;align-items:stretch;overflow:visible}.flashcard-wrapper--fullscreen .flashcard{width:100%;max-width:56rem;margin:0 auto;height:100%;min-height:0;max-height:none;aspect-ratio:auto;flex:1}.flashcard-wrapper--fullscreen .flashcard-fullscreen-icon{display:none}.flashcard--fullscreen .flashcard-inner{position:relative;width:100%;height:100%;min-height:0}.flashcard--fullscreen .flashcard-face{padding:2rem 2.5rem;min-height:0;height:100%}.flashcard--fullscreen .flashcard-face .flashcard-close-fullscreen-on-card{top:1.25rem;right:1.25rem}.flashcard--fullscreen .flashcard-face--back{padding:2rem 2.5rem}.flashcard--fullscreen .flashcard-front-label{font-size:clamp(1.75rem,4vw,2.5rem);font-weight:700}.flashcard--fullscreen .flashcard-back-header{margin-bottom:1.25rem;padding-bottom:1rem}.flashcard--fullscreen .flashcard-back-title{font-size:clamp(1.25rem,2.5vw,1.75rem)}.flashcard--fullscreen .flashcard-back-grid{gap:1rem 1.5rem}.flashcard--fullscreen .flashcard-back-item{padding:.75rem 1rem}.flashcard--fullscreen .flashcard-back-label{font-size:.75rem}.flashcard--fullscreen .flashcard-back-value{font-size:clamp(.95rem,1.5vw,1.15rem);line-height:1.4}.flashcard--fullscreen .flashcard-back-callout{margin-top:1.25rem;padding:1rem 1.25rem}.flashcard--fullscreen .flashcard-back-callout-title{font-size:.75rem;margin-bottom:.4rem}.flashcard--fullscreen .flashcard-back-callout-text{font-size:clamp(.95rem,1.3vw,1.1rem);line-height:1.55}.flashcard-close-fullscreen{align-self:center;min-width:10rem;padding:.75rem 1.5rem;font-size:1rem;flex-shrink:0}.nav-drawer-kofi{margin-top:.75rem;padding-top:.75rem;border-top:1px solid var(--border-subtle);min-height:2.5rem;display:flex;align-items:center}.nav-drawer-kofi .btn-container{width:100%}.nav-drawer-kofi .kofi-button{display:flex!important;align-items:center;justify-content:center;width:100%;box-sizing:border-box}.nav-kofi-wrap{display:inline-flex;align-items:center;margin-left:.25rem}.nav-kofi-wrap .kofi-button{font-size:.875rem!important;padding:.4rem .75rem!important;min-width:120px!important}.disclaimer{margin-bottom:3.5rem}