:root{--bg: #0b0f14;--surface: #10161d;--surface-2: #0f141b;--text: #e6eef8;--muted: #93a4b5;--accent: #f97316;--green: #22c55e;--red: #ef4444;--blue: #3b82f6;--pink: #ec4899}*{box-sizing:border-box}html,body,#root{height:calc(var(--vh, 1vh) * 100);overflow:hidden}body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji";color:var(--text);background:radial-gradient(1200px 600px at 100% 0%,#111827 0%,var(--bg) 40%);position:relative}.app-container{height:calc(var(--vh, 1vh) * 100);display:grid;grid-template-rows:auto 1fr auto;overflow:hidden;padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom)}.app-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;min-height:60px;padding-top:calc(12px + env(safe-area-inset-top))}@media (max-width: 768px){.app-header{padding:8px 12px;min-height:50px;padding-top:calc(8px + env(safe-area-inset-top))}.brand-logo{width:28px;height:28px;font-size:14px}.brand-name{font-size:16px}.header-right{gap:8px}.score-text{padding:4px 8px;font-size:12px}.google-login-btn{padding:6px 12px;font-size:12px}.google-icon{width:16px;height:16px}.user-profile{padding:6px 8px}.user-avatar{width:24px;height:24px}.user-name{font-size:12px}.user-email{font-size:10px}.logout-btn{padding:3px 6px;font-size:10px}}.brand{display:inline-flex;align-items:center;gap:8px}.brand-logo{width:36px;height:36px;display:inline-grid;place-items:center;background:var(--accent);color:#fff;border-radius:10px;font-weight:800}.brand-name{font-weight:800;letter-spacing:.6px}.header-right{display:flex;align-items:center;gap:16px}.score{display:flex;align-items:center}.score-text{background:var(--surface);padding:6px 12px;border-radius:20px;font-size:14px;font-weight:600;color:var(--muted)}.google-login-btn{display:none!important}.google-login-btn{display:inline-flex;align-items:center;gap:8px;background:#fff;color:#333;border:1px solid #ddd;border-radius:8px;padding:8px 16px;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s ease;box-shadow:0 2px 4px #0000001a}.google-login-btn:hover{background:#f8f9fa;box-shadow:0 4px 8px #00000026}.google-icon{width:18px;height:18px}.user-profile{display:flex;align-items:center;gap:12px;background:var(--surface);padding:8px 12px;border-radius:12px;box-shadow:0 2px 8px #0003}.user-info{display:flex;align-items:center;gap:8px}.user-avatar{width:32px;height:32px;border-radius:50%;object-fit:cover}.user-details{display:flex;flex-direction:column;gap:2px}.user-name{font-size:14px;font-weight:600;color:var(--text);line-height:1}.user-email{font-size:12px;color:var(--muted);line-height:1}.logout-btn{background:var(--surface-2);color:var(--muted);border:1px solid var(--surface-2);border-radius:6px;padding:4px 8px;font-size:12px;cursor:pointer;transition:all .2s ease}.logout-btn:hover{background:var(--red);color:#fff;border-color:var(--red)}.app-main{display:grid;place-items:center;padding:8px 12px 16px;gap:16px;overflow:hidden;min-height:0}@media (max-width: 768px){.app-main{padding:4px 8px 12px;gap:12px}.instructions{max-width:100%;padding:0 8px}.instructions h2{font-size:20px;margin-bottom:6px}.instructions p{font-size:14px;margin-bottom:12px}.direction-hints{gap:12px;margin-bottom:8px}.hint{padding:6px 12px;font-size:12px}.keyboard-hints p{font-size:11px}}@media (max-width: 768px){.instructions{margin:0;padding:0 8px}.instructions h2,.keyboard-hints{display:none}.direction-hints{justify-content:flex-start;gap:8px;margin:0 0 4px;padding:6px 8px;border-radius:9999px;background:var(--surface);border:1px solid var(--surface-2);overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch}.direction-hints::-webkit-scrollbar{display:none}.direction-hints{scrollbar-width:none}.hint{background:transparent;border:1px solid rgba(255,255,255,.12);padding:6px 10px;font-size:12px;border-radius:9999px}}.instructions{text-align:center;max-width:500px}.instructions h2{margin:0 0 8px;font-size:24px;font-weight:700}.instructions p{margin:0 0 16px;color:var(--muted)}.direction-hints{display:flex;gap:20px;justify-content:center;flex-wrap:wrap;margin-bottom:12px}.hint{background:var(--surface);padding:8px 16px;border-radius:20px;font-weight:600;font-size:14px;color:var(--text);border:2px solid transparent}.der-hint{border-color:var(--blue);color:var(--blue)}.die-hint{border-color:var(--pink);color:var(--pink)}.das-hint{border-color:var(--green);color:var(--green)}.keyboard-hints{margin-top:8px}.keyboard-hints p{margin:0;font-size:12px;color:var(--muted);opacity:.8}.app-footer{color:var(--muted);text-align:center;padding:8px 12px 16px;padding-bottom:calc(12px + env(safe-area-inset-bottom))}@media (max-width: 768px){.app-footer{padding:6px 8px 12px;padding-bottom:calc(8px + env(safe-area-inset-bottom));font-size:12px}}.loading{display:grid;place-items:center;gap:20px;height:calc(var(--vh, 1vh) * 100);overflow:hidden}.loading-spinner{width:40px;height:40px;border:3px solid var(--surface);border-top:3px solid var(--accent);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.stack-container{width:min(720px,100%);display:grid;gap:16px}.stack{position:relative;width:100%;height:min(65svh,600px);max-height:600px}@media (max-width: 768px){.stack{height:min(70svh,500px);max-height:500px}.stack-container{gap:12px}}.stack-card{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;border-radius:18px;overflow:hidden;touch-action:none;will-change:transform;-webkit-user-select:none;user-select:none;box-shadow:0 10px 30px #0006,0 2px 10px #0003}@media (max-width: 768px){.stack-card{border-radius:16px}.card-meta{left:12px;right:12px;bottom:12px}.card-title{font-size:clamp(18px,5vw,24px)}.card-subtitle{font-size:13px;margin-top:4px}.card-attribution{bottom:6px;right:6px}.attribution-link{font-size:9px;padding:3px 6px}}.stack-card.top{cursor:grab}.stack-card.top:active{cursor:grabbing}.card-content{position:relative;width:100%;height:100%;background:var(--surface-2);overflow:hidden}.card-image{width:100%;height:100%;object-fit:cover;display:block}.card-gradient{position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(180deg,transparent 0%,transparent 40%,rgba(0,0,0,.3) 60%,rgba(0,0,0,.8) 100%);pointer-events:none}.card-meta{position:absolute;left:16px;right:16px;bottom:16px;z-index:10}.card-title{margin:0;font-size:clamp(20px,4.6vw,28px);color:#fff;text-shadow:0 2px 4px rgba(0,0,0,.8);line-height:1.2}.card-subtitle{margin:6px 0 0;color:#e6eef8;text-shadow:0 1px 2px rgba(0,0,0,.8);font-size:14px}.card-attribution{position:absolute;bottom:8px;right:8px;z-index:15}.attribution-link{color:#ffffffb3;text-decoration:none;font-size:10px;padding:4px 8px;background:#00000080;border-radius:4px;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);transition:all .2s ease}.attribution-link:hover{background:#000000b3;color:#ffffffe6}.labels{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}.label{position:absolute;top:16px;padding:6px 10px;border-radius:8px;font-weight:800;letter-spacing:1px;border:3px solid currentColor;opacity:0;transform:rotate(-8deg)}.label.der{left:16px;color:var(--blue)}.label.die{right:16px;color:var(--pink);transform:rotate(8deg)}.label.das{left:50%;transform:translate(-50%);color:var(--green)}.actions{display:grid;grid-auto-flow:column;gap:16px;justify-content:center}.btn{width:68px;height:68px;border-radius:999px;border:none;color:#fff;font-size:14px;font-weight:700;display:inline-grid;place-items:center;background:var(--surface);box-shadow:0 8px 24px #00000059;transition:transform .12s ease,background .2s ease}.btn:active{transform:scale(.96)}.btn-der{background:linear-gradient(180deg,#1f2937,#0b0f14);color:var(--blue)}.btn-die{background:linear-gradient(180deg,#1f2937,#0b0f14);color:var(--pink)}.btn-das{background:linear-gradient(180deg,#1f2937,#0b0f14);color:var(--green)}.feedback-overlay{position:fixed;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;background:#000c;z-index:1000;animation:fadeIn .3s ease}.feedback-content{background:var(--surface);padding:32px;border-radius:16px;text-align:center;box-shadow:0 20px 40px #00000080;animation:slideUp .3s ease}.feedback-content.correct{border:3px solid var(--green)}.feedback-content.incorrect{border:3px solid var(--red)}.feedback-icon{font-size:48px;margin-bottom:16px}.feedback-message{font-size:20px;font-weight:700;margin-bottom:8px}.full-answer-container{margin:16px 0}.full-answer{font-size:24px;font-weight:700;display:flex;gap:8px;justify-content:center;align-items:center}.artikel{font-weight:800}.noun{color:var(--text)}.correct-answer{color:var(--muted);font-size:14px;margin-top:8px}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 768px){.app-container{height:calc(var(--vh, 1vh) * 100)}.btn{min-height:44px;min-width:44px}.actions{gap:12px;padding:16px}.stack-card{touch-action:pan-x pan-y}.card-title{text-shadow:0 2px 8px rgba(0,0,0,.9)}.card-subtitle{text-shadow:0 1px 4px rgba(0,0,0,.9)}}@supports (-webkit-touch-callout: none){.app-container{height:calc(var(--vh, 1vh) * 100)}.stack{height:min(70svh,500px);max-height:-webkit-fill-available}}@media (max-width: 375px){.app-header{padding:6px 8px;min-height:44px}.brand-logo{width:24px;height:24px;font-size:12px}.brand-name{font-size:14px}.header-right{gap:6px}.score-text{padding:3px 6px;font-size:11px}.google-login-btn{padding:4px 8px;font-size:11px}.user-profile{padding:4px 6px}.user-avatar{width:20px;height:20px}.user-name{font-size:11px}.user-email{font-size:9px}.app-main{padding:2px 6px 8px;gap:8px}.instructions h2{font-size:18px}.instructions p{font-size:13px}.direction-hints{gap:8px}.hint{padding:4px 8px;font-size:11px}.stack{height:min(75svh,450px)}.card-meta{left:8px;right:8px;bottom:8px}.card-title{font-size:clamp(16px,4.5vw,20px)}.card-subtitle{font-size:12px}}