:root{--color-paper: #F5F0E8;--color-ink: #2C2C2C;--color-primary-deep: #1a3a4a;--color-primary: #2a5c6b;--color-primary-mid: #4a8a9a;--color-primary-light: #5db8c9;--color-primary-pale: #7ec8d9;--color-brown: #966635;--color-light: #FFFFFF;--color-muted: #8B8B8B;--color-border: #E5DDD3;--color-shadow: rgba(26, 58, 74, .08);--font-display: "Noto Serif SC", "Source Han Serif SC", Georgia, serif;--font-body: "Noto Sans SC", "Source Han Sans SC", -apple-system, sans-serif;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 16px;--transition-slow: .8s cubic-bezier(.22, 1, .36, 1);--transition-medium: .5s cubic-bezier(.22, 1, .36, 1);--transition-fast: .3s ease-out;--z-base: 1;--z-paper: 10;--z-overlay: 100;--safe-top: env(safe-area-inset-top, 0px);--safe-bottom: env(safe-area-inset-bottom, 0px);--safe-left: env(safe-area-inset-left, 0px);--safe-right: env(safe-area-inset-right, 0px)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{width:100%;height:100%;overflow:hidden;background:var(--color-paper);color:var(--color-ink);font-family:var(--font-body);font-weight:300;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;-webkit-text-size-adjust:100%}#app{touch-action:manipulation;width:100%;height:100%;position:relative;overflow:hidden}.paper-bg{position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(ellipse at 20% 50%,rgba(42,92,107,.04) 0%,transparent 60%),radial-gradient(ellipse at 80% 30%,rgba(93,184,201,.04) 0%,transparent 50%),linear-gradient(180deg,#f5f0e8,#f1ebe1);z-index:0}.screen{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:var(--z-base);opacity:0;pointer-events:none;transition:opacity var(--transition-medium);padding-top:var(--safe-top);padding-bottom:var(--safe-bottom)}.screen.active{opacity:1;pointer-events:auto}.paper{overflow:hidden;position:relative;width:min(640px,88vw);min-height:min(480px,70vh);max-height:90vh;background:var(--color-light);border-radius:var(--radius-lg);box-shadow:0 2px 8px var(--color-shadow),0 8px 32px #1a3a4a0f;padding:48px 40px;display:flex;flex-direction:column;align-items:center;justify-content:center;transition:transform var(--transition-slow),box-shadow var(--transition-slow);transform-style:preserve-3d;perspective:1200px;overflow-y:auto;-webkit-overflow-scrolling:touch}.paper.flip-out{transform:rotateY(-15deg) scale(.97);box-shadow:-4px 2px 12px var(--color-shadow),0 8px 32px #1a3a4a0a;opacity:.6}.paper.flip-in{animation:paperFlipIn var(--transition-slow) forwards}@keyframes paperFlipIn{0%{transform:rotateY(15deg) scale(.97);opacity:.6;box-shadow:2px 2px 12px var(--color-shadow)}to{transform:rotateY(0) scale(1);opacity:1;box-shadow:0 2px 8px var(--color-shadow),0 8px 32px #1a3a4a0f}}.reveal-text{opacity:0;transform:translateY(12px);filter:blur(3px);animation:textReveal 1s ease-out forwards}.reveal-text.delay-1{animation-delay:.2s}.reveal-text.delay-2{animation-delay:.5s}.reveal-text.delay-3{animation-delay:.8s}.reveal-text.delay-4{animation-delay:1.1s}@keyframes textReveal{0%{opacity:0;transform:translateY(12px);filter:blur(3px)}to{opacity:1;transform:translateY(0);filter:blur(0)}}.display-title{font-family:var(--font-display);font-weight:700;font-size:clamp(2rem,5vw,3.2rem);line-height:1.3;letter-spacing:.02em;text-align:center}.display-sub{font-family:var(--font-display);font-weight:400;font-size:clamp(1.1rem,2.5vw,1.6rem);line-height:1.5;letter-spacing:.03em;text-align:center;color:var(--color-ink)}.body-text{font-family:var(--font-body);font-weight:300;font-size:clamp(.95rem,2vw,1.1rem);line-height:1.7;text-align:center;color:var(--color-ink)}.muted-text{color:var(--color-muted);font-size:clamp(.8rem,1.5vw,.9rem)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;min-height:44px;border:none;border-radius:var(--radius-sm);font-family:var(--font-body);font-size:clamp(.9rem,1.8vw,1rem);font-weight:400;cursor:pointer;transition:all var(--transition-fast);background:transparent;color:var(--color-ink);position:relative;text-decoration:none;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}.btn:hover{background:#2a5c6b0f}.btn:active{transform:scale(.97)}.btn:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.btn-outline{background:transparent;color:var(--color-primary);border:1px solid var(--color-primary-mid);border-radius:var(--radius-sm)}.btn-outline:hover{background:#2a5c6b0a;border-color:var(--color-primary)}.btn-outline:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:linear-gradient(135deg,var(--color-primary-deep),var(--color-primary-mid));color:var(--color-light);padding:14px 36px;min-height:48px;font-weight:500;letter-spacing:.04em;border-radius:var(--radius-md);box-shadow:0 2px 8px #1a3a4a33}.btn-primary:hover{background:linear-gradient(135deg,#15303e,#3d7a8a);box-shadow:0 4px 16px #1a3a4a4d;transform:translateY(-1px)}.btn-primary:active{background:linear-gradient(135deg,#0f2530,#2a5c6b)}.btn-secondary{background:transparent;color:var(--color-primary);border:1px solid var(--color-primary-pale);padding:12px 28px;min-height:44px;font-weight:400;border-radius:var(--radius-md)}.btn-secondary:hover{background:#5db8c90f;border-color:var(--color-primary-light)}.btn-ghost{color:var(--color-muted);font-size:clamp(.8rem,1.5vw,.85rem);padding:8px 16px;min-height:44px}.btn-ghost:hover{color:var(--color-ink);background:#2c2c2c0a}.progress-dots{display:flex;gap:8px;align-items:center;margin-bottom:24px;flex-shrink:0}.progress-dot{width:8px;height:8px;border-radius:50%;background:var(--color-border);transition:all var(--transition-medium)}.progress-dot.active{background:var(--color-primary-light);width:24px;border-radius:4px;box-shadow:0 0 8px #5db8c94d}.progress-dot.done{background:var(--color-primary-mid);opacity:.4}.writing-area{width:100%;max-width:480px;margin-top:24px;position:relative;flex-shrink:0}.writing-area textarea{width:100%;padding:16px 0;border:none;border-bottom:1px solid var(--color-border);background:transparent;font-family:var(--font-body);font-size:clamp(.95rem,2vw,1.05rem);font-size:max(16px,clamp(.95rem,2vw,1.05rem));font-weight:300;line-height:1.8;color:var(--color-ink);resize:none;outline:none;transition:border-color var(--transition-fast);min-height:48px;-webkit-appearance:none;-moz-appearance:none;appearance:none;border-radius:0}.writing-area textarea:focus{border-bottom-color:var(--color-primary-light)}.writing-area textarea::placeholder{color:var(--color-muted);opacity:.6;font-weight:300}.writing-area .char-count{text-align:right;color:var(--color-muted);font-size:.75rem;margin-top:4px;opacity:0;transition:opacity var(--transition-fast)}.writing-area textarea:focus~.char-count,.writing-area textarea:not(:placeholder-shown)~.char-count{opacity:1}.mode-toggle{display:flex;gap:4px;background:#2c2c2c0a;border-radius:20px;padding:3px;margin-top:12px;flex-shrink:0}.mode-toggle .btn{padding:6px 18px;min-height:36px;border-radius:18px;font-size:.8rem;font-weight:400}.mode-toggle .btn.active{background:var(--color-light);box-shadow:0 1px 4px var(--color-shadow);color:var(--color-ink)}.image-toggle{display:inline-flex;align-items:center;gap:6px;margin-top:12px;padding:6px 16px;min-height:44px;border-radius:20px;border:1px solid var(--color-border);background:transparent;font-family:var(--font-body);font-size:.8rem;color:var(--color-muted);cursor:pointer;transition:all var(--transition-fast)}.image-toggle:hover{border-color:var(--color-primary-light);color:var(--color-primary);background:#5db8c90a}.btn-image-action{display:inline-flex;align-items:center;gap:4px;padding:8px 18px;min-height:44px;border-radius:20px;border:1px solid var(--color-border);background:var(--color-light);font-family:var(--font-body);font-size:.8rem;color:var(--color-ink);cursor:pointer;transition:all .2s ease;-webkit-tap-highlight-color:transparent}.btn-image-action:active{transform:scale(.96)}.feedback-container{width:100%;max-width:560px;display:flex;flex-direction:column;align-items:center;gap:32px;padding:20px 0}.mirror{text-align:center;padding:32px 24px;position:relative}.mirror:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;border-radius:50%/60% 60% 40% 40%;background:radial-gradient(ellipse at center,rgba(245,240,232,.6) 0%,transparent 70%);box-shadow:0 0 40px #2a5c6b0f;pointer-events:none}.mirror-name{font-family:var(--font-display);font-size:clamp(1.6rem,4vw,2.4rem);font-weight:700;background:linear-gradient(135deg,var(--color-primary-deep),var(--color-primary-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:8px}.mirror-line{font-family:var(--font-serif);font-size:clamp(1rem,2.2vw,1.2rem);font-weight:400;line-height:1.6;color:var(--color-ink)}.journey-map{width:100%;padding:20px 0;display:flex;flex-direction:column;align-items:center;gap:12px;overflow:hidden}.map-title{font-family:var(--font-display);font-size:clamp(.9rem,1.8vw,1rem);font-weight:600;color:var(--color-brown);letter-spacing:.04em}.map-path{display:flex;align-items:center;justify-content:center;gap:0;width:100%;max-width:320px;margin:0 auto;overflow:hidden;flex-shrink:0}.map-node{display:flex;flex-direction:column;align-items:center;gap:4px;position:relative;flex-shrink:0;min-width:44px;min-height:44px;justify-content:center}.map-node-dot{width:10px;height:10px;border-radius:50%;background:var(--color-primary-mid);opacity:.3;transition:all var(--transition-medium);flex-shrink:0}.map-node-dot.filled{opacity:1;width:14px;height:14px;background:var(--color-primary-light);box-shadow:0 0 8px #5db8c94d}.map-node-label{font-size:.6rem;color:var(--color-muted);text-align:center;white-space:nowrap}.map-line{width:40px;flex-shrink:1;height:2px;background:var(--color-border);align-self:center}.map-line.filled{background:var(--color-primary-light);opacity:.5}.letter{width:100%;padding:32px 28px;background:#f5f0e866;border-radius:var(--radius-md);position:relative}.letter:before{content:"✉";position:absolute;top:-12px;left:50%;transform:translate(-50%);font-size:1.4rem;opacity:.3}.letter-content{font-family:var(--font-body);font-size:clamp(.85rem,1.8vw,.95rem);font-weight:300;line-height:1.9;color:var(--color-ink);white-space:pre-wrap}@media (orientation: landscape) and (max-height: 500px){.paper{width:94vw;min-height:auto;max-height:85vh;padding:20px 28px;border-radius:var(--radius-md);flex-direction:row;flex-wrap:wrap;justify-content:center;align-items:flex-start;gap:8px}.paper>.progress-dots{width:100%;margin-bottom:8px}.paper>.image-card{margin-top:4px!important;min-height:40px!important}.paper>.writing-area{margin-top:8px;max-width:100%}.paper>.writing-area textarea{min-height:32px;padding:8px 0;font-size:14px}.paper>.mode-toggle{margin-top:4px}.paper>div:last-child{padding-top:8px!important}.feedback-container{gap:16px;padding:8px 0}.mirror{padding:16px 12px}.letter{padding:16px}}@media (orientation: landscape) and (min-height: 500px) and (max-height: 700px){.paper{padding:28px 32px;min-height:auto;max-height:88vh}}@media (max-width: 640px){.paper{width:92vw;min-height:auto;max-height:88vh;padding:32px 24px;border-radius:var(--radius-md)}.mirror{padding:24px 16px}.letter{padding:24px 20px}.map-path{max-width:300px}.writing-area{margin-top:16px}.writing-area textarea{padding:12px 0}}@media (max-width: 480px){.paper{padding:24px 16px;width:96vw;border-radius:var(--radius-sm)}.writing-area textarea{font-size:14px}.writing-area textarea::placeholder{font-size:14px}.map-path{max-width:280px}.map-line{min-width:16px;max-width:36px}.map-node-dot{width:8px;height:8px}.map-node-dot.filled{width:11px;height:11px}.map-node-label{font-size:.5rem}.btn-primary{padding:12px 24px;font-size:.9rem;width:100%}.btn-ghost{font-size:.75rem;padding:6px 12px}.feedback-container{gap:20px;padding:8px 0}}@media (max-width: 380px){.paper{padding:20px 12px}.display-title{font-size:1.4rem}.display-sub{font-size:.95rem}}@media (hover: none) and (pointer: coarse){.btn:hover,.btn-image-action:hover,.btn-outline:hover{background:transparent;transform:none}.btn-primary:hover{background:linear-gradient(135deg,var(--color-primary-deep),var(--color-primary-mid));transform:none;box-shadow:0 2px 8px #1a3a4a33}.btn:active,.btn-image-action:active{transform:scale(.96)}}@supports (padding: max(0px)){.screen{padding-left:max(16px,var(--safe-left));padding-right:max(16px,var(--safe-right));padding-top:max(16px,var(--safe-top));padding-bottom:max(16px,var(--safe-bottom))}}.fade-in{animation:fadeIn var(--transition-slow) forwards}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.slide-up{animation:slideUp var(--transition-slow) forwards}@keyframes slideUp{0%{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}.hide-scrollbar{-ms-overflow-style:none;scrollbar-width:none}.hide-scrollbar::-webkit-scrollbar{display:none}.paper-edge{position:absolute;top:0;right:0;bottom:0;left:0;border-radius:inherit;box-shadow:inset 0 0 0 1px #fffc;pointer-events:none}@keyframes shake{0%,to{transform:translate(0)}10%,50%,90%{transform:translate(-4px)}30%,70%{transform:translate(4px)}}.textarea-shake{animation:shake .4s ease-out}.hint-visible{color:var(--color-primary)!important;font-weight:400!important}.btn-deep{background:linear-gradient(135deg,var(--color-primary-deep),var(--color-primary-mid));color:var(--color-light);padding:10px 24px;min-height:44px;font-size:clamp(.85rem,1.6vw,.95rem);border-radius:var(--radius-md);border:none;cursor:pointer;font-family:var(--font-body);font-weight:400;letter-spacing:.03em;box-shadow:0 2px 6px #1a3a4a26;transition:all var(--transition-fast)}.btn-deep:hover{box-shadow:0 4px 12px #1a3a4a40;transform:translateY(-1px)}.btn-deep:active{transform:scale(.97)}.btn-export{background:transparent;color:var(--color-primary);border:1px solid var(--color-primary-pale);padding:8px 20px;min-height:44px;font-size:clamp(.8rem,1.5vw,.9rem);border-radius:20px;cursor:pointer;font-family:var(--font-body);transition:all var(--transition-fast)}.btn-export:hover{background:#5db8c90f;border-color:var(--color-primary-light)}.signature-input{width:100%;max-width:280px;padding:10px 12px;min-height:44px;border:none;border-bottom:1px solid var(--color-border);background:transparent;font-family:var(--font-body);font-size:clamp(.85rem,1.6vw,.95rem);font-size:max(16px,clamp(.85rem,1.6vw,.95rem));color:var(--color-ink);text-align:center;outline:none;transition:border-color var(--transition-fast)}.signature-input:focus{border-bottom-color:var(--color-primary-light)}.signature-input::placeholder{color:var(--color-muted);opacity:.5}.ambient-glow{position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;z-index:0;background:radial-gradient(ellipse at 60% 40%,rgba(93,184,201,.03) 0%,transparent 50%),radial-gradient(ellipse at 30% 70%,rgba(42,92,107,.02) 0%,transparent 40%);transition:opacity var(--transition-slow)}