:root{--paper: #F6F1E7;--paper-deep: #EDE4D3;--ink: #40372C;--ink-soft: #7A6E5D;--seal: #A4403A;--gold: #B08D57;--mist: #D9CFBD}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--paper);color:var(--ink);font-family:Hiragino Mincho ProN,Hiragino Mincho Pro,Yu Mincho,serif;font-size:17px;line-height:1.9;-webkit-font-smoothing:antialiased}button,input,textarea{font:inherit;color:var(--ink)}input,textarea{padding:10px 12px;border:1px solid var(--mist);border-radius:8px;background:#fff;width:100%}.app{display:flex;flex-direction:column;height:100%}.demo-banner{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:6px 12px;padding-top:calc(6px + env(safe-area-inset-top));font-size:13px;background:var(--ink);color:var(--paper)}.demo-banner button{font-size:13px;padding:4px 10px;border:1px solid var(--paper);border-radius:6px;background:none;color:var(--paper);width:auto}.screen{padding:20px 20px calc(24px + env(safe-area-inset-bottom))}.screen--center{min-height:100%;display:flex;align-items:center;justify-content:center}.screen__title{font-size:20px;font-weight:600;margin:0 0 8px}.screen__subtitle{font-size:15px;font-weight:600;color:var(--ink-soft);margin:20px 0 8px}.screen__note{color:var(--ink-soft)}.screen__note--small{font-size:13px;margin-top:-4px}.anniversary{text-align:center;font-size:14px;color:var(--gold);margin-bottom:12px}.anniversary p{margin:0}.anniversary--today{font-size:16px;font-weight:600}.login{display:flex;flex-direction:column;gap:16px;width:min(320px,80vw);text-align:center}.login__logo{font-size:24px;font-weight:600;letter-spacing:.12em;margin:0 0 8px}.login__label{color:var(--ink-soft);font-size:15px}.login input{text-align:center;padding:12px}.login button{font-size:16px;padding:12px;border:none;border-radius:8px;background:var(--seal);color:#fff}.login button:disabled{opacity:.5}.login__error{color:var(--seal);font-size:15px;margin:0}.btn{display:inline-block;padding:12px 16px;border:none;border-radius:8px;width:auto}.btn--seal{background:var(--seal);color:#fff}.btn--ghost{background:none;color:var(--ink-soft);text-decoration:underline;text-underline-offset:4px}.btn--small{padding:8px 12px;font-size:14px}.btn:disabled{opacity:.5}.envelope-card{display:flex;align-items:center;gap:12px;width:100%;text-align:left;padding:16px;margin-bottom:10px;border:1px solid var(--mist);border-radius:12px;background:var(--paper-deep)}.envelope-card--opened{background:#fff}.envelope-card__icon{font-size:24px}.envelope-card__text{flex:1;display:flex;flex-direction:column}.envelope-card__title{font-weight:600}.envelope-card__meta{font-size:13px;color:var(--ink-soft)}.envelope-card__seal{color:var(--seal);font-size:18px}.presence{margin-top:20px;font-size:14px;color:var(--ink-soft);text-align:center}.modal{position:fixed;inset:0;z-index:10;background:var(--paper);overflow-y:auto;display:flex;flex-direction:column}.modal__envelope{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;padding:24px}.modal__body{display:flex;flex-direction:column;gap:16px;padding:32px 20px calc(32px + env(safe-area-inset-bottom));max-width:480px;width:100%;margin:0 auto}.modal__from{color:var(--ink-soft);font-size:14px;margin:0;text-align:center}.modal__kind{color:var(--ink-soft);font-size:14px;margin:0}.modal__hint{color:var(--ink-soft);font-size:14px;text-align:center;margin:0}.modal__close{align-self:center}.envelope-art{font-size:72px;line-height:1}.letter-paper{background:#fff;border:1px solid var(--mist);border-radius:8px;padding:24px 20px;font-size:19px;line-height:1.9}.letter-paper p{margin:0}.letter-photo{display:block;width:100%;margin-top:14px;border-radius:6px;border:1px solid var(--mist)}.photo-field{display:flex;flex-direction:column;gap:8px;align-items:flex-start}.photo-field__img{max-width:100%;max-height:220px;border-radius:8px;border:1px solid var(--mist)}.result{border-radius:8px;padding:16px;text-align:center}.result--success{background:#fff;border:1px solid var(--gold)}.result--fail{background:#fff;border:1px solid var(--mist)}.result__title{font-weight:600;margin:0 0 8px}.result p{margin:0}.reply{display:flex;flex-direction:column;gap:10px}.gimmick-card{background:#fff;border:1px solid var(--mist);border-radius:12px;padding:14px 16px;margin-bottom:10px}.gimmick-card__head{display:flex;justify-content:space-between;align-items:center}.gimmick-card__type{font-size:13px;color:var(--ink-soft)}.gimmick-card__title{font-weight:600;margin:4px 0 0}.gimmick-card__memo{font-size:13px;color:var(--ink-soft);margin:2px 0 0}.gimmick-card__meta{font-size:13px;color:var(--ink-soft);margin:4px 0 0}.gimmick-card__reply{font-size:14px;color:var(--ink);background:var(--paper);border-radius:8px;padding:8px 12px;margin:8px 0 0}.gimmick-card__actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}.badge{font-size:12px;padding:2px 10px;border-radius:999px;border:1px solid var(--mist);color:var(--ink-soft)}.badge--released,.badge--opened,.badge--replied{border-color:var(--seal);color:var(--seal)}.badge--scheduled{border-color:var(--gold);color:var(--gold)}.fab{width:100%;margin-top:16px}.form{display:flex;flex-direction:column;gap:8px}.form__label{font-size:13px;color:var(--ink-soft);margin-top:10px}.form__hint{font-size:13px;color:var(--ink-soft);margin:4px 0 0}.form__error{color:var(--seal);font-size:14px;margin:8px 0 0}.form__actions{display:flex;flex-direction:column;gap:8px;margin-top:16px}.type-picker{display:flex;gap:6px;flex-wrap:wrap}.type-picker__item{padding:8px 12px;font-size:14px;border:1px solid var(--mist);border-radius:999px;background:none;color:var(--ink-soft);width:auto}.type-picker__item--active{border-color:var(--seal);color:var(--seal);font-weight:600}.shell{display:flex;flex-direction:column;flex:1;min-height:0}.shell__main{flex:1;overflow-y:auto}.tabbar{display:flex;border-top:1px solid var(--mist);background:var(--paper-deep);padding-bottom:env(safe-area-inset-bottom)}.tabbar__item{flex:1;font-size:13px;padding:12px 0;border:none;background:none;color:var(--ink-soft);width:auto}.tabbar__item--active{color:var(--seal);font-weight:600}