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var(--border);border-radius:var(--radius-card);box-shadow:0 12px 30px #0e17301a}.study-button{border:1px solid var(--border-strong);border-radius:var(--radius-control);background:var(--surface);min-height:48px;color:var(--ink);justify-content:center;align-items:center;gap:8px;padding:0 14px;font-size:.92rem;font-weight:700;line-height:1.1;text-decoration:none;transition:background .16s,border-color .16s,color .16s,transform .16s;display:inline-flex}.study-button:hover{background:var(--surface-muted);border-color:var(--ink-muted)}.study-button:active{transform:translateY(1px)}.study-button-primary{border-color:var(--brand);background:var(--brand);color:#fff}.study-button-primary:hover{background:var(--brand-strong);border-color:var(--brand-strong)}.study-input,.study-select{border:1px solid var(--border-strong);border-radius:var(--radius-control);background:var(--surface-raised);width:100%;min-height:52px;color:var(--ink);padding:0 13px;font-size:16px;font-weight:650}.study-input:focus-visible,.study-select:focus-visible{border-color:var(--brand);outline:3px solid var(--focus)}.fc-page{width:min(100%,760px);padding:12px max(12px, env(safe-area-inset-right)) max(16px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));flex-direction:column;gap:12px;margin:0 auto;display:flex}.fc-toolbar{align-items:stretch;gap:8px;display:flex}.fc-tabs{border:1px solid var(--border);background:var(--surface-muted);border-radius:10px;flex:1;grid-template-columns:1fr 1fr;gap:4px;padding:4px;display:grid}.fc-tab{min-height:44px;color:var(--ink-muted);touch-action:manipulation;background:0 0;border:0;border-radius:7px;font-size:.95rem;font-weight:800}.fc-tab[aria-pressed=true]{background:var(--brand);color:#fff;box-shadow:0 1px 3px #0b15334d}.fc-filter-toggle{border:1px solid var(--border-strong);background:var(--surface);min-height:52px;color:var(--ink);touch-action:manipulation;border-radius:10px;align-items:center;gap:8px;padding:0 16px;font-size:.95rem;font-weight:800;display:inline-flex}.fc-filter-toggle.is-active,.fc-filter-toggle[aria-expanded=true]{border-color:var(--brand);color:var(--brand-strong)}.fc-filter-count{background:var(--brand);color:#fff;border-radius:999px;justify-content:center;align-items:center;min-width:22px;height:22px;font-size:.75rem;display:inline-flex}.fc-filters{border:1px solid var(--border);background:var(--surface);border-radius:10px;gap:10px;padding:12px;display:grid}.fc-filters-row{grid-template-columns:1fr;gap:10px;display:grid}.fc-filter-label{color:var(--ink-muted);margin-bottom:4px;font-size:.78rem;font-weight:700;display:block}.fc-filters-actions{gap:8px;display:flex}.fc-chips{scrollbar-width:none;gap:6px;display:flex;overflow-x:auto}.fc-chip{max-width:80vw;color:var(--brand-strong);white-space:nowrap;text-overflow:ellipsis;background:#14224a14;border:1px solid #14224a3d;border-radius:999px;flex-shrink:0;align-items:center;gap:2px;padding:0 0 0 12px;font-size:.82rem;font-weight:700;display:inline-flex;overflow:hidden}.fc-chip button{min-width:44px;min-height:44px;color:inherit;background:0 0;border:0;font-size:1.2rem;font-weight:800}.fc-queue{color:var(--ink-muted);flex-wrap:wrap;gap:4px 14px;font-size:.85rem;font-weight:600;display:flex}.fc-queue strong{color:var(--ink);font-weight:850}.fc-review{flex-direction:column;gap:10px;display:flex}.fc-card{border:1px solid var(--border);background:var(--surface);border-radius:14px;flex-direction:column;min-height:max(320px,100dvh - 330px);display:flex;overflow:hidden;box-shadow:0 8px 24px #0e173014}.fc-card-meta{justify-content:space-between;align-items:center;gap:8px;padding:12px 14px 0;display:flex}.fc-meta-pill{background:var(--surface-muted);color:var(--ink-muted);white-space:nowrap;border-radius:999px;padding:3px 10px;font-size:.78rem;font-weight:700}.fc-meta-category{text-overflow:ellipsis;color:var(--brand-strong);background:#14224a14;overflow:hidden}.fc-front{text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:18px;padding:20px 18px;display:flex}.fc-card.is-revealed .fc-front{border-bottom:1px solid var(--border);flex:none;padding:18px 18px 14px}.fc-front-button{width:100%;color:inherit;cursor:pointer;background:0 0;border:0}.fc-term{color:var(--ink);overflow-wrap:anywhere;-webkit-hyphens:auto;hyphens:auto;font-size:clamp(2rem,9vw,3rem);font-weight:900;line-height:1.12}.fc-term-mid{font-size:clamp(1.6rem,7vw,2.3rem)}.fc-term-long{font-size:clamp(1.3rem,5.5vw,1.8rem);line-height:1.22}.fc-card.is-revealed .fc-term{color:var(--ink-muted);font-size:clamp(1.25rem,5vw,1.6rem)}.fc-hint{color:var(--ink-muted);font-size:.85rem;font-weight:600}.fc-answer{background:var(--surface-raised);text-align:left;flex-direction:column;flex:1;gap:12px;padding:16px 18px 20px;display:flex}.fc-answer-term{color:var(--brand-strong);font-size:clamp(1.5rem,6.5vw,2rem);font-weight:900;line-height:1.15}.fc-answer-def{color:var(--ink);font-size:1.08rem;font-weight:600;line-height:1.55}.fc-answer-de,.fc-answer-example{border-top:1px solid var(--border);color:var(--ink-muted);padding-top:10px;font-size:.95rem;font-weight:600;line-height:1.5}.fc-answer-label{color:var(--ink-muted);margin-bottom:2px;font-size:.74rem;font-weight:800;display:block}.fc-actions{z-index:20;padding:10px 12px max(10px, env(safe-area-inset-bottom));background:linear-gradient(180deg, #f6f7f300, var(--background) 30%);margin:0 -12px;position:sticky;bottom:0}.fc-reveal,.fc-rate{touch-action:manipulation;border-radius:12px;justify-content:center;align-items:center;min-height:60px;font-weight:850;transition:transform .12s,background .16s;display:flex}.fc-reveal{border:1px solid var(--accent-strong);background:var(--accent);width:100%;color:var(--accent-ink);gap:10px;font-size:1.1rem}.fc-reveal:hover{background:var(--accent-strong)}.fc-reveal:active,.fc-rate:active{transform:scale(.97)}.fc-rate-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;display:grid}.fc-rate{color:#fff;border:1px solid #0000;flex-direction:column;gap:2px;min-height:64px;padding:0 4px;font-size:.95rem}.fc-rate:disabled{opacity:.6}.fc-rate-key{opacity:.8;font-size:.72rem;font-weight:700}@media (max-width:420px){.fc-rate{font-size:.85rem}.fc-rate-key,.fc-reveal .fc-rate-key{display:none}}@media (min-width:640px){.fc-page{gap:16px;padding-top:24px}.fc-filters-row{grid-template-columns:1fr 1fr}.fc-card{min-height:440px}.fc-actions{margin:0;padding-inline:0}}@media (pointer:coarse){.fc-rate-key{display:none}}.fc-page-wide{width:min(100%,1100px)}.fc-browse-grid{grid-template-columns:repeat(auto-fill,minmax(min(100%,260px),1fr));gap:12px;display:grid}.card-front,.card-back{min-width:0;padding:16px}.card-front{overflow:hidden}.fc-browse-term{width:100%;color:var(--ink);overflow-wrap:anywhere;-webkit-hyphens:auto;hyphens:auto;font-size:clamp(1.15rem,4.6vw,1.5rem);font-weight:900;line-height:1.2}@media (min-width:640px){.fc-browse-term{font-size:1.35rem}}.app-frame{min-height:100dvh}.app-content{min-width:0;min-height:100dvh;padding-bottom:calc(76px + env(safe-area-inset-bottom));flex-direction:column;display:flex}.app-frame:has(.is-guest) .app-content{padding-bottom:0}.app-footer{color:var(--ink-muted);text-align:center;padding:18px 16px;font-size:.78rem;font-weight:600}.app-side{z-index:50;padding:max(8px, env(safe-area-inset-top)) 14px 8px;background:var(--brand);color:#fff;justify-content:space-between;align-items:center;gap:12px;display:flex;position:sticky;top:0}.app-brand{min-height:48px;color:inherit;align-items:center;gap:10px;text-decoration:none;display:inline-flex}.brand-mark{width:40px;height:40px;color:var(--brand);font-family:var(--font-display-stack);background:#fff;border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;font-size:.9rem;font-weight:800;display:inline-flex;position:relative}.brand-mark-tag{background:var(--accent);width:12px;height:12px;box-shadow:0 0 0 2px var(--brand);border-radius:999px;position:absolute;top:-3px;right:-3px}.app-brand-text{flex-direction:column;line-height:1.15;display:flex}.app-brand-title{font-family:var(--font-display-stack);font-size:1.05rem;font-weight:700}.app-brand-sub{color:#ffffffa6;font-size:.72rem;font-weight:600}.app-user{align-items:center;display:flex}.app-user-name{display:none}.app-logout{border-radius:var(--radius-control);color:#ffffffd9;touch-action:manipulation;background:0 0;border:0;justify-content:center;align-items:center;gap:10px;min-width:48px;min-height:48px;font-weight:700;display:inline-flex}.app-logout span{display:none}.app-nav{z-index:60;padding:6px 6px calc(6px + env(safe-area-inset-bottom));border-top:1px solid var(--border);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#fffffff5;display:flex;position:fixed;bottom:0;left:0;right:0}.app-nav-link{min-height:56px;color:var(--ink-muted);touch-action:manipulation;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:3px;font-size:.72rem;font-weight:700;text-decoration:none;display:flex}.app-nav-link svg{box-sizing:content-box;border-radius:999px;padding:4px 16px}.app-nav-link[aria-current=page]{color:var(--brand)}.app-nav-link[aria-current=page] svg{background:var(--accent);color:var(--accent-ink)}.app-nav-label-full{display:none}.app-guest-links{gap:8px;display:flex}.app-guest-links .study-button{min-height:44px;padding:0 14px}.is-guest .app-guest-links .study-button:not(.study-button-primary){color:#fff;background:0 0;border-color:#ffffff59}@media (min-width:768px){.app-frame{grid-template-columns:236px minmax(0,1fr);display:grid}.app-frame:has(.is-guest){display:block}.app-content{padding-bottom:0}.app-frame:has(.is-guest) .app-content{padding-bottom:0}.app-side:not(.is-guest){height:100dvh;padding:max(22px, env(safe-area-inset-top)) 14px max(18px, env(safe-area-inset-bottom));flex-direction:column;justify-content:flex-start;align-items:stretch;gap:20px}.app-nav{-webkit-backdrop-filter:none;backdrop-filter:none;background:0 0;border:0;flex-direction:column;gap:6px;padding:0;position:static}.app-nav-link{border-radius:var(--radius-control);color:#ffffffc7;flex-direction:row;flex:none;justify-content:flex-start;gap:14px;min-height:54px;padding:0 16px;font-size:1rem}.app-nav-link svg{border-radius:0;padding:0}.app-nav-link:hover{color:#fff;background:#ffffff14}.app-nav-link[aria-current=page]{background:var(--accent);color:var(--accent-ink)}.app-nav-link[aria-current=page] svg{background:0 0}.app-nav-label{display:none}.app-nav-label-full{display:inline}.app-user{border-top:1px solid #ffffff24;flex-direction:column;align-items:stretch;gap:8px;margin-top:auto;padding-top:14px}.app-user-name{flex-direction:column;padding:0 6px;font-weight:700;display:flex}.app-user-role{color:#fff9;font-size:.78rem;font-weight:600}.app-logout{justify-content:flex-start;padding:0 16px}.app-logout span{display:inline}.app-logout:hover{background:#ffffff14}}.app-nav-link:focus-visible,.app-logout:focus-visible,.app-brand:focus-visible{outline:3px solid var(--focus);outline-offset:2px}.fc-speak{border:1px solid var(--border-strong);background:var(--surface);width:44px;height:44px;color:var(--brand-strong);touch-action:manipulation;border-radius:999px;flex-shrink:0;justify-content:center;align-items:center;margin:-8px -6px -8px 0;display:inline-flex}.fc-answer-head{justify-content:space-between;align-items:flex-start;gap:10px;display:flex}.fc-page{padding-top:16px}.fc-tabs{background:var(--surface-muted);border-color:#0000;border-radius:16px}.fc-tab{border-radius:12px;justify-content:center;align-items:center;gap:8px;min-height:48px;font-weight:700;display:inline-flex}.fc-tab[aria-pressed=true]{background:var(--brand);box-shadow:0 2px 6px #0b15334d}.fc-filter-toggle{border-radius:16px;min-height:56px;font-weight:700}.fc-filter-count{background:var(--accent);color:var(--accent-ink)}.fc-filters{border-radius:var(--radius-card);box-shadow:var(--shadow-card)}.fc-card{box-shadow:var(--shadow-card);border-radius:24px}.fc-meta-pill{font-weight:700}.fc-meta-category{color:var(--brand);background:#14224a14}.fc-term{font-weight:800}.fc-answer{background:var(--surface-raised);border-top:1px solid var(--border)}.fc-answer-term{color:var(--brand);font-weight:800}.fc-hint{background:var(--accent);color:var(--accent-ink);border-radius:999px;padding:6px 14px;font-weight:700;display:inline-flex}.fc-speak{color:var(--brand)}.fc-speak.is-active{background:var(--accent);border-color:var(--accent-strong);color:var(--accent-ink)}.fc-reveal,.fc-rate{border-radius:16px;min-height:64px}.fc-reveal{box-shadow:0 5px 0 var(--accent-strong);margin-bottom:5px}.fc-reveal:active{box-shadow:0 2px 0 var(--accent-strong);transform:translateY(3px)}.fc-rate-again{background:var(--danger)}.fc-rate-hard{background:var(--warning)}.fc-rate-good{background:var(--brand)}.fc-rate-easy{background:var(--success)}.fc-chip{color:var(--brand);background:#14224a12;border-color:#14224a33}@media (min-width:768px){.fc-page{gap:18px;width:min(100%,900px);padding:28px 32px 40px}.fc-page-wide{width:min(100%,1180px)}.fc-card{min-height:max(520px,100dvh - 380px)}.fc-term{font-size:clamp(3rem,6vw,4.5rem)}.fc-term-mid{font-size:clamp(2.3rem,4.5vw,3.3rem)}.fc-term-long{font-size:clamp(1.8rem,3.4vw,2.5rem)}.fc-card.is-revealed .fc-term{font-size:1.8rem}.fc-answer-term{font-size:2.3rem}.fc-answer-def{font-size:1.3rem}.fc-answer-de,.fc-answer-example{font-size:1.05rem}.fc-rate{min-height:72px;font-size:1.05rem}.fc-reveal{min-height:72px;font-size:1.2rem}.fc-actions{background:0 0;margin:0;padding-inline:0}}@media (max-width:420px){.fc-filter-text{display:none}.fc-filter-toggle{padding:0 14px}.fc-tab{gap:6px;font-size:.9rem}}@media (max-width:767px){.fc-actions{bottom:calc(68px + env(safe-area-inset-bottom))}.fc-card{min-height:max(300px,100dvh - 400px)}}.fc-voice{border:1px solid var(--border);border-radius:var(--radius-card);background:var(--surface)}.fc-voice summary{min-height:48px;color:var(--brand);cursor:pointer;align-items:center;padding:0 16px;font-size:.9rem;font-weight:700;list-style:none;display:flex}.fc-voice summary::-webkit-details-marker{display:none}.fc-voice-body{gap:12px;padding:4px 16px 16px;display:grid}.fc-voice-row{gap:4px;display:grid}.fc-voice-pick{grid-template-columns:minmax(0,1fr) auto;gap:8px;display:grid}.fc-voice-hint{color:var(--ink-muted);font-size:.85rem;font-weight:500;line-height:1.45}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:20px}.field{border:1px solid var(--border-strong);border-radius:var(--radius-control);background:var(--surface-raised);width:100%;min-height:52px;color:var(--ink);padding:0 13px;font-size:16px;font-weight:650}.button{border:1px solid var(--brand);border-radius:var(--radius-control);background:var(--brand);color:#fff;cursor:pointer;justify-content:center;align-items:center;gap:8px;min-height:48px;padding:0 16px;font-size:.92rem;font-weight:700;text-decoration:none;transition:background .16s,transform .16s;display:inline-flex}.button:hover{background:var(--brand-strong)}.button:active{transform:translateY(1px)}.button:disabled{opacity:.6;cursor:default}.button-quiet{background:var(--surface);color:var(--ink);border-color:var(--border-strong)}.button-quiet:hover{background:var(--surface-muted)}.button-quiet[aria-selected=true]{background:var(--brand);color:#fff;border-color:var(--brand)}.page{flex-direction:column;gap:16px;width:min(100%,900px);margin:0 auto;padding:16px 12px 32px;display:flex}@media (min-width:768px){.page{gap:18px;padding:28px 32px 40px}}.page-heading{font-size:clamp(1.6rem,5vw,2.2rem);font-weight:800}.vi-text{font-family:var(--font-display-stack);font-weight:800}.tone-mark{text-align:center;margin-right:4px;display:inline-block}@media (prefers-reduced-motion:reduce){.animate-fade-in{animation:none}.fc-reveal,.fc-rate,.button{transition:none}}@property --tw-space-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-leading{syntax:"*";inherits:false}@property --tw-font-weight{syntax:"*";inherits:false}