diff --git a/frontend/src/style.css b/frontend/src/style.css
index 4f69721..2544697 100644
--- a/frontend/src/style.css
+++ b/frontend/src/style.css
@@ -38,3 +38,17 @@ main{min-width:0;padding:27px 34px 50px;overflow:auto;background:linear-gradient
 .countdown-compose-enter-active,.countdown-compose-leave-active{transition:background .24s ease}.countdown-compose-enter-active .countdown-modal,.countdown-compose-leave-active .countdown-modal{transition:transform .34s cubic-bezier(.18,.9,.28,1.16),opacity .22s ease,filter .22s ease;transform-origin:var(--fab-origin-x,calc(100% - 43px)) var(--fab-origin-y,calc(100% - 104px))}.countdown-compose-enter-from,.countdown-compose-leave-to{background:rgba(45,38,31,0)}.countdown-compose-enter-from .countdown-modal,.countdown-compose-leave-to .countdown-modal{transform:translate(20px,28px) scale(.18) rotate(8deg);opacity:0;filter:blur(5px)}@media(max-width:930px){.unified-fab{bottom:calc(82px + env(safe-area-inset-bottom))}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}
 .overdue-section{margin-top:18px}.overdue-heading{color:var(--danger);margin-bottom:6px}.overdue-heading span{min-width:22px;height:22px;padding:0 7px;display:inline-grid;place-items:center;border-radius:999px;background:#fde2dc;color:var(--danger);font-size:11px}.overdue-list{margin-bottom:18px}.overdue-task{background:#fff8f6}.overdue-task .meta,.overdue-badge{color:var(--danger)}.overdue-badge{font-size:11px;font-weight:700;background:#fde2dc;border-radius:999px;padding:4px 8px}.pager{display:flex;align-items:center;justify-content:flex-end;gap:10px;margin:0 0 14px}.pager button:disabled{opacity:.4;cursor:not-allowed}.pager span{color:var(--muted);font-size:13px}.section-heading{display:flex;align-items:center;gap:7px;margin:16px 0 10px;font-size:16px;line-height:1.35;color:#514a40}.section-heading svg{width:17px;height:17px;color:var(--accent)}.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}.more-settings{border:1px solid var(--line);border-radius:10px;background:#fff}.more-settings summary{cursor:pointer;padding:11px 13px;color:#756d61;font-size:12px;font-weight:700}.more-settings-body{display:grid;gap:12px;padding:0 13px 13px}.more-settings-body>label{display:grid;grid-template-columns:80px 1fr;align-items:center;gap:7px;color:#756d61;font-size:12px;font-weight:650}.modal-mask{position:fixed;inset:0;z-index:80;background:rgba(45,38,31,.4);display:grid;place-items:center;padding:24px}.modal-box{width:min(360px,92vw);background:#fffdf8;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:22px;display:grid;gap:14px}.modal-box h3{margin:0;font-size:17px}.modal-box label{display:grid;gap:7px;font-size:12px;font-weight:650;color:#756d61}.modal-input{width:100%;border:1px solid var(--line);background:#fff;padding:11px;border-radius:9px;outline:none;font-size:16px}.modal-actions{display:flex;justify-content:flex-end;gap:8px}.countdown-view{display:grid;gap:16px;padding-bottom:36px}.countdown-content{display:grid;gap:16px}.countdown-hero{display:flex;align-items:end;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:10px}.countdown-hero small{display:block;color:var(--muted);font-size:12px}.countdown-layout{display:grid;gap:22px;align-items:start}.countdown-timeline{display:grid;gap:20px;max-width:820px;width:100%;margin:0 auto}.countdown-group{display:grid;gap:2px}.countdown-group>h3{margin:0 0 7px;padding-left:12px;color:#8a8175;font-size:11px;font-weight:750;letter-spacing:.08em}.countdown-row{--countdown-tone:#d9a17c;position:relative;width:100%;min-height:66px;display:grid;grid-template-columns:minmax(0,1fr) 86px;align-items:center;gap:14px;border:0;border-bottom:1px solid var(--line);border-radius:0;background:transparent;padding:9px 10px 9px 17px;text-align:left;color:inherit;transition:background .15s ease,transform .15s ease}.countdown-row:before{content:'';position:absolute;left:3px;top:50%;width:4px;height:4px;border-radius:50%;background:var(--countdown-tone);transform:translateY(-50%)}.countdown-row:first-of-type{border-top:1px solid var(--line)}.countdown-row:hover{background:#fffaf3}.countdown-row:active{transform:scale(.995)}.countdown-row.kind-anniversary{--countdown-tone:#b69b7d}.countdown-row.kind-birthday{--countdown-tone:#9cab8d}.countdown-row.today{--countdown-tone:#71856b}.countdown-row.past{--countdown-tone:#aaa094;opacity:.66}.countdown-row .pinned-icon{position:absolute;right:4px;top:5px}.countdown-icon{width:38px;height:38px;border-radius:12px;background:#fff2e8;display:grid;place-items:center;font-size:19px}.countdown-main{min-width:0;display:grid;gap:4px}.countdown-main>b{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:15px;color:#3f3932}.countdown-main>small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted);font-size:11px}.countdown-badges{display:flex;gap:5px}.countdown-badges em{font-style:normal;color:#8a7f72;font-size:10px}.countdown-badges em+em:before{content:'·';margin-right:5px;color:#c1b7aa}.countdown-state{display:grid;justify-items:end;gap:3px}.countdown-state strong{font-variant-numeric:tabular-nums;font-size:26px;line-height:1;color:#62594e}.countdown-state small{color:var(--muted);font-size:10px}.countdown-row.today .countdown-state strong,.countdown-row.today .countdown-state small{color:#71856b}.countdown-row.past .countdown-state strong{color:#887d70}.countdown-focus{--countdown-tone:#d9a17c;width:min(720px,100%);min-height:255px;margin:0 auto;display:grid;place-content:center;justify-items:center;gap:7px;border:1px solid color-mix(in srgb,var(--countdown-tone) 34%,var(--line));border-radius:16px;background:color-mix(in srgb,var(--countdown-tone) 7%,#fffdf8);padding:28px 24px;text-align:center;color:inherit;box-shadow:none;transition:border-color .15s ease,background .15s ease}.countdown-focus:hover{border-color:color-mix(in srgb,var(--countdown-tone) 54%,var(--line));background:color-mix(in srgb,var(--countdown-tone) 10%,#fffdf8)}.countdown-focus.kind-anniversary{--countdown-tone:#b69b7d}.countdown-focus.kind-birthday{--countdown-tone:#9cab8d}.countdown-focus>small{color:#8b8276;font-size:10px;font-weight:750;letter-spacing:.1em}.countdown-focus h3{margin:7px 0 0;font-size:20px;font-weight:680}.countdown-focus p{margin:1px 0 0;color:var(--muted);font-size:11px}.countdown-number{display:flex;align-items:end;gap:6px;margin:4px 0 3px}.countdown-number strong{font-variant-numeric:tabular-nums;font-size:76px;line-height:.9;font-weight:720;letter-spacing:-.05em;color:#3f3932}.countdown-number span{font-size:13px;color:#7a7165;padding-bottom:6px}.countdown-copy{font-size:12px;color:#71685e;font-weight:650}.countdown-empty{min-height:260px;background:#fffdf8;border:1px dashed var(--line);border-radius:16px;padding:26px;color:#766d60;text-align:center;display:grid;gap:9px;place-content:center;justify-items:center}.countdown-empty svg{color:var(--accent);width:30px;height:30px}.countdown-empty span{font-size:12px}.countdown-empty button{margin-top:5px}.archived-toggle,.archived-countdowns button{display:inline-flex;align-items:center;gap:5px;border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px 11px;font-size:12px}.archived-toggle{justify-self:start}.archived-countdowns{display:grid;gap:10px}.archived-countdowns article{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 14px}.archived-countdowns article b{flex:1}.archived-countdowns article small{color:var(--muted)}.countdown-detail-mask,.countdown-modal-mask{position:fixed;inset:0;background:rgba(45,38,31,.36);display:grid;padding:20px}.countdown-detail-mask{z-index:85;place-items:end center}.countdown-detail-sheet{width:min(500px,100%);background:#fffdf8;border:1px solid var(--line);border-radius:20px;box-shadow:0 12px 36px rgba(56,40,24,.18);padding:18px;display:grid;gap:16px}.countdown-detail-sheet header{display:grid;grid-template-columns:42px 1fr 44px;align-items:center;gap:10px}.countdown-detail-sheet header small{color:var(--muted);font-size:11px}.countdown-detail-sheet header h3{margin:2px 0 0;font-size:19px}.countdown-detail-sheet header button{min-width:44px;min-height:44px;border:0;background:transparent;color:#766d60;border-radius:8px;width:44px;height:44px;display:grid;place-items:center}.countdown-modal header button{min-width:44px;min-height:44px;border:0;background:transparent;color:#766d60;border-radius:8px;width:44px;height:44px;display:grid;place-items:center}.countdown-detail-days{display:flex;align-items:baseline;gap:6px;padding:8px 0}.countdown-detail-days strong{font-variant-numeric:tabular-nums;font-size:46px;line-height:1}.countdown-detail-days span{color:var(--muted)}.countdown-detail-days b{margin-left:auto;color:var(--accent);font-size:13px}.countdown-detail-sheet dl{margin:0;display:grid;gap:1px;background:var(--line)}.countdown-detail-sheet dl div{display:grid;grid-template-columns:62px 1fr;gap:10px;background:#fffdf8;padding:10px 0}.countdown-detail-sheet dt{color:var(--muted);font-size:12px}.countdown-detail-sheet dd{margin:0;font-size:13px}.countdown-detail-sheet footer{display:flex;justify-content:flex-end;gap:8px}.countdown-detail-sheet footer button{min-height:44px;display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px 13px}.countdown-modal-mask{z-index:90;place-items:center}.countdown-modal{width:min(420px,96vw);background:#fffdf8;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:18px;display:grid;gap:12px}.countdown-modal header{display:flex;justify-content:space-between;align-items:start}.countdown-modal header small{color:var(--muted)}.countdown-modal header h3{margin:2px 0 0}.countdown-modal label{display:grid;gap:6px;color:#675f54;font-size:12px;font-weight:650}.countdown-modal input,.countdown-modal select{border:1px solid var(--line);background:#fff;border-radius:10px;padding:11px 12px;outline:none}.countdown-modal input:focus,.countdown-modal select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(241,90,41,.1)}.countdown-title-fields{display:grid;grid-template-columns:72px 1fr;gap:8px}.countdown-modal footer{display:flex;justify-content:flex-end;gap:8px;padding-top:6px}.countdown-advanced{border:1px solid var(--line);border-radius:11px;background:#fffaf4}.countdown-advanced summary{min-height:44px;display:flex;align-items:center;justify-content:space-between;padding:0 12px;cursor:pointer;color:#756d61;font-size:12px;font-weight:700;list-style:none}.countdown-advanced summary::-webkit-details-marker{display:none}.countdown-advanced summary svg{width:16px;height:16px;transition:transform .16s ease}.countdown-advanced[open] summary svg{transform:rotate(180deg)}.countdown-advanced>label,.countdown-advanced>.countdown-title-fields{margin:0 12px 12px}.countdown-detail-enter-active,.countdown-detail-leave-active{transition:background .2s ease}.countdown-detail-enter-active .countdown-detail-sheet,.countdown-detail-leave-active .countdown-detail-sheet{transition:transform .24s ease,opacity .2s ease}.countdown-detail-enter-from .countdown-detail-sheet,.countdown-detail-leave-to .countdown-detail-sheet{transform:translateY(100%);opacity:.6}@media(max-width:930px){.countdown-layout{grid-template-columns:1fr;gap:16px}.countdown-focus{display:grid;min-height:205px;padding:22px 16px}.countdown-number strong{font-size:64px}.countdown-timeline{gap:16px}}@media(max-width:800px){.countdown-hero{align-items:center}.countdown-hero h2{font-size:19px}.countdown-row{grid-template-columns:minmax(0,1fr) 72px;padding:9px 4px;gap:9px}.countdown-state strong{font-size:25px}.countdown-detail-mask,.countdown-modal-mask{place-items:end;padding:0}.countdown-detail-sheet,.countdown-modal{width:100%;border-radius:22px 22px 0 0;padding:18px 16px calc(18px + env(safe-area-inset-bottom));max-height:min(88dvh,760px);overflow:auto}.countdown-view{position:relative}}
 @media(max-width:930px){.countdown-row,.countdown-row:first-of-type{min-height:62px;grid-template-columns:minmax(0,1fr) 72px;gap:8px;padding:8px 9px 8px 17px;background:transparent;border:0;border-bottom:1px solid var(--line);border-radius:0;box-shadow:none}.countdown-row:first-of-type{border-top:1px solid var(--line)}.countdown-row.pinned,.countdown-row.today{background:transparent}.countdown-state strong{font-size:24px}}
+
+/* Warm Liquid Glass: restrained depth for chrome and overlays, not list rows. */
+:root{--radius-control:12px;--radius-card:20px;--radius-panel:28px;--glass-surface:rgba(255,253,248,.74);--glass-surface-strong:rgba(255,253,248,.84);--glass-border:rgba(255,255,255,.72);--glass-shadow:0 18px 48px rgba(67,48,30,.12),inset 0 1px 0 rgba(255,255,255,.78);--sheet-radius:28px}
+body{background:radial-gradient(ellipse 70% 48% at 12% 4%,rgba(241,90,41,.09),transparent 62%),radial-gradient(ellipse 54% 48% at 88% 88%,rgba(113,133,107,.07),transparent 66%),#f8f3e8}
+.auth-card,.today-board,.tool-card,.empty-panel{border-radius:var(--radius-card)}
+.auth-card{background:var(--glass-surface-strong);border-color:var(--glass-border);box-shadow:var(--glass-shadow);backdrop-filter:blur(24px) saturate(1.35) brightness(1.03);-webkit-backdrop-filter:blur(24px) saturate(1.35) brightness(1.03)}
+.primary,.soft-button,.primary-small,.danger-button,.file-button,.auth-card input,.detail-form input,.detail-form select,.markdown textarea,.password-form input,.modal-input{border-radius:var(--radius-control)}
+.sidebar,.detail,.bottom,.app-sheet,.modal-box{background:var(--glass-surface-strong);border-color:var(--glass-border);box-shadow:var(--glass-shadow);backdrop-filter:blur(26px) saturate(1.45) brightness(1.04);-webkit-backdrop-filter:blur(26px) saturate(1.45) brightness(1.04)}
+.detail-head,.app-sheet__header,.app-sheet__footer{background:rgba(255,253,248,.68);backdrop-filter:blur(18px) saturate(1.35);-webkit-backdrop-filter:blur(18px) saturate(1.35)}
+.paper,.habit-detail-sheet,.countdown-detail-sheet,.task-compose-sheet,.more-sheet,.modal-box{border-radius:var(--radius-panel)}
+.paper{border-color:rgba(255,255,255,.78);box-shadow:0 10px 30px rgba(76,57,34,.08)}
+.habit-detail-sheet,.countdown-detail-sheet,.task-compose-sheet,.more-sheet,.modal-box{background:var(--glass-surface-strong);border-color:var(--glass-border);box-shadow:var(--glass-shadow);backdrop-filter:blur(28px) saturate(1.5) brightness(1.04);-webkit-backdrop-filter:blur(28px) saturate(1.5) brightness(1.04)}
+.modal-mask,.task-compose-mask,.habit-detail-mask,.countdown-detail-mask,.countdown-modal-mask,.app-sheet-mask.app-sheet-mask,.scrim,.more-mask{background:rgba(45,38,31,.3)}
+@media(max-width:930px){.sidebar{border-radius:0 var(--radius-panel) var(--radius-panel) 0}.detail,.app-sheet,.task-compose-sheet,.habit-detail-sheet,.countdown-detail-sheet,.more-sheet{border-radius:var(--sheet-radius) var(--sheet-radius) 0 0!important}.bottom{left:12px;right:12px;bottom:max(10px,env(safe-area-inset-bottom));border:1px solid var(--glass-border);border-radius:24px;padding:7px 5px;box-shadow:0 12px 34px rgba(67,48,30,.14),inset 0 1px 0 rgba(255,255,255,.78)}.bottom button{border-radius:16px}.bottom button.active{background:rgba(241,90,41,.1)}.unified-fab{bottom:calc(88px + env(safe-area-inset-bottom))}}