/* ============================================================================
   NotePlus — Public Library
   Dashboard-grade UI for the anonymous Library (browse / detail / study / wall).
   Built on the app design tokens in noteplus-play.css (--np-*), so it inherits
   light/dark theming and the product look. Per-type accent: deck=brand,
   quiz=ai/purple, resource=streak/amber.
   ========================================================================== */

.lib-page {
    font-family: var(--np-font-sans, 'Inter', system-ui, sans-serif);
    background:
        radial-gradient(60% 60% at 100% 0%, color-mix(in srgb, var(--np-brand) 9%, transparent), transparent 60%),
        var(--np-paper, #FAFAF9);
    color: var(--np-ink, #0F172A);
    min-height: 100vh;
    margin: 0;
}

.lib-shell { max-width: 1160px; margin: 0 auto; padding: 0 22px 64px; }

/* ----------------------------------------------------------------- hero ---- */
.lib-hero {
    position: relative;
    overflow: hidden;
    border-radius: 26px;
    padding: 40px 36px;
    margin: 26px 0 24px;
    color: #fff;
    background: var(--np-grad-hero-rich, linear-gradient(135deg, #047857, #10B981));
    box-shadow: 0 18px 44px color-mix(in srgb, var(--np-brand, #10B981) 28%, transparent);
}
.lib-hero h1 {
    font-family: var(--np-font-chunky, 'Nunito', sans-serif);
    font-weight: 900; font-size: 38px; line-height: 1.08; margin: 0 0 10px; letter-spacing: -0.02em;
}
.lib-hero p { font-size: 16px; max-width: 560px; margin: 0; opacity: .92; }
.lib-hero .lib-hero-chips { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 20px; }
.lib-hero .chip {
    display: inline-flex; align-items: center; gap: 7px; padding: 8px 14px; border-radius: 999px;
    background: rgba(255,255,255,.16); backdrop-filter: blur(4px); font-weight: 700; font-size: 13px;
}
.lib-hero .chip i { width: 15px; height: 15px; }
.lib-hero .lib-hero-art {
    position: absolute; right: -40px; top: -40px; width: 230px; height: 230px; border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, rgba(255,255,255,.28), transparent 65%); pointer-events: none;
}

/* --------------------------------------------------------------- toolbar --- */
.lib-toolbar { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; justify-content: space-between; margin-bottom: 22px; }

.lib-tabs { display: inline-flex; gap: 4px; background: var(--np-surface-2, #F8FAFC); border: 1.5px solid var(--np-border, #F1F5F9); border-radius: 14px; padding: 5px; }
.lib-tab {
    display: inline-flex; align-items: center; gap: 8px; padding: 9px 16px; border-radius: 10px;
    font-weight: 700; font-size: 13.5px; color: var(--np-ink-muted, #64748B); text-decoration: none; transition: all .14s;
}
.lib-tab i { width: 16px; height: 16px; }
.lib-tab:hover { color: var(--np-ink, #0F172A); }
.lib-tab.on { background: var(--np-surface, #fff); color: var(--np-ink, #0F172A); box-shadow: 0 2px 8px rgba(16,24,40,.08); }
.lib-tab.on.t-deck     { color: var(--np-brand-darker, #047857); }
.lib-tab.on.t-quiz     { color: var(--np-ai-darker, #6D28D9); }
.lib-tab.on.t-resource { color: var(--np-streak-darker, #B45309); }

.lib-filters { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.lib-search { position: relative; }
.lib-search i { position: absolute; left: 13px; top: 50%; transform: translateY(-50%); width: 16px; height: 16px; color: var(--np-ink-muted, #94a3b8); }
.lib-input, .lib-select {
    background: var(--np-surface, #fff); border: 1.5px solid var(--np-border-2, #E2E8F0); border-radius: 12px;
    padding: 11px 14px; font-size: 13.5px; color: var(--np-ink, #0F172A); outline: none; font-family: inherit; transition: border-color .14s;
}
.lib-input:focus, .lib-select:focus { border-color: var(--np-brand, #10B981); }
.lib-search .lib-input { padding-left: 38px; min-width: 240px; }

/* ----------------------------------------------------------- section head -- */
.lib-sec-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin: 22px 0 16px; }
.lib-sec-head h2 { font-family: var(--np-font-display, 'Plus Jakarta Sans', sans-serif); font-weight: 800; font-size: 19px; margin: 0; color: var(--np-ink, #0F172A); }
.lib-sec-head .count { font-size: 13px; color: var(--np-ink-muted, #64748B); font-weight: 600; }

/* All / Featured view toggle */
.lib-view-tabs { display: inline-flex; gap: 4px; background: var(--np-surface-2, #F8FAFC); border: 1.5px solid var(--np-border, #F1F5F9); border-radius: 12px; padding: 4px; }
.lib-view-tab { display: inline-flex; align-items: center; gap: 6px; padding: 7px 15px; border-radius: 9px; font-weight: 700; font-size: 13px; color: var(--np-ink-muted, #64748B); text-decoration: none; transition: all .14s; }
.lib-view-tab i { width: 14px; height: 14px; }
.lib-view-tab:hover { color: var(--np-ink, #0F172A); }
.lib-view-tab.on { background: var(--np-surface, #fff); color: var(--np-ink, #0F172A); box-shadow: 0 2px 8px rgba(16,24,40,.08); }
.lib-view-feat.on { color: var(--np-streak-darker, #B45309); }

/* ------------------------------------------------------------------ grid --- */
.lib-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(224px, 1fr)); gap: 14px; }

.lib-card {
    --c: var(--np-brand, #10B981); --cs: var(--np-brand-soft, #ECFDF5); --cd: var(--np-brand-darker, #047857);
    position: relative; overflow: hidden; display: flex; flex-direction: column;
    background: var(--np-surface, #fff); border: 1.5px solid var(--np-border, #F1F5F9); border-radius: 16px;
    padding: 15px; text-decoration: none; color: inherit; min-height: 150px;
    transition: transform .16s, box-shadow .16s, border-color .16s;
}
.lib-card.t-deck     { --c: #10B981; --cs: #D1FAE5; --cd: #047857; }
.lib-card.t-quiz     { --c: #8B5CF6; --cs: #EDE9FE; --cd: #6D28D9; }
.lib-card.t-resource { --c: #F59E0B; --cs: #FEF3C7; --cd: #B45309; }
.lib-card:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(16,24,40,.10); border-color: var(--cs); }
.lib-card .blob { position: absolute; top: -28px; right: -28px; width: 92px; height: 92px; border-radius: 50%; background: var(--cs); opacity: .6; transition: transform .3s; }
.lib-card:hover .blob { transform: scale(1.4); }

.lib-card .head { position: relative; display: flex; align-items: center; gap: 10px; }
.lib-card .ic {
    width: 40px; height: 40px; border-radius: 11px; flex-shrink: 0; display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, var(--cs), var(--np-surface, #fff)); box-shadow: inset 0 0 0 1px var(--cs);
}
.lib-card .ic i { width: 20px; height: 20px; color: var(--cd); }
.lib-card .badge {
    display: inline-flex; align-items: center; gap: 4px; padding: 2px 8px; border-radius: 999px; font-size: 10px;
    font-weight: 800; letter-spacing: .03em; text-transform: uppercase; background: var(--cs); color: var(--cd);
}
.lib-card .t {
    position: relative; font-family: var(--np-font-display, 'Plus Jakarta Sans', sans-serif); font-weight: 800;
    font-size: 14.5px; line-height: 1.25; margin: 11px 0 4px; color: var(--np-ink, #0F172A);
    display: -webkit-box; -webkit-line-clamp: 2; line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.lib-card .d {
    position: relative; font-size: 12px; color: var(--np-ink-muted, #64748B); line-height: 1.45; margin: 0;
    display: -webkit-box; -webkit-line-clamp: 2; line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 33px;
}
.lib-card .author { position: relative; display: flex; align-items: center; gap: 5px; margin-top: 9px; font-size: 11.5px; color: var(--np-ink-muted, #94a3b8); font-weight: 600; }
.lib-card .author i { width: 13px; height: 13px; }
.lib-card .author .verified { color: var(--np-brand-dark, #059669); }
.lib-card .meta { position: relative; display: flex; align-items: center; flex-wrap: wrap; gap: 10px; margin-top: auto; padding-top: 11px; font-size: 11.5px; color: var(--np-ink-muted, #94a3b8); font-weight: 600; }
.lib-card .meta span { display: inline-flex; align-items: center; gap: 4px; }
.lib-card .meta i { width: 13px; height: 13px; }
.lib-card .go {
    position: absolute; right: 13px; bottom: 13px; width: 31px; height: 31px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center; background: var(--cs); color: var(--cd);
    transition: background .16s, color .16s, transform .16s;
}
.lib-card:hover .go { background: var(--c); color: #fff; transform: translateX(2px); }
.lib-card .go i { width: 16px; height: 16px; }

/* ------------------------------------------------------------- empty/pager - */
.lib-empty { text-align: center; padding: 56px 20px; color: var(--np-ink-muted, #64748B); }
.lib-empty i { width: 40px; height: 40px; color: var(--np-border-2, #CBD5E1); }
.lib-pager { display: flex; justify-content: center; align-items: center; gap: 10px; margin: 34px 0 4px; }
.lib-pager .pg { font-size: 13px; color: var(--np-ink-muted, #64748B); font-weight: 600; }

/* =============================== detail =================================== */
.lib-detail { max-width: 860px; margin: 0 auto; }
.lib-back { display: inline-flex; align-items: center; gap: 6px; color: var(--np-ink-muted, #64748B); text-decoration: none; font-weight: 700; font-size: 13px; margin: 24px 0 18px; }
.lib-back:hover { color: var(--np-brand-dark, #059669); }
.lib-detail-card {
    --c: var(--np-brand, #10B981); --cs: var(--np-brand-soft, #ECFDF5); --cd: var(--np-brand-darker, #047857);
    position: relative; overflow: hidden; background: var(--np-surface, #fff); border: 1.5px solid var(--np-border, #F1F5F9);
    border-radius: 24px; padding: 30px;
}
.lib-detail-card.t-deck     { --c: #10B981; --cs: #D1FAE5; --cd: #047857; }
.lib-detail-card.t-quiz     { --c: #8B5CF6; --cs: #EDE9FE; --cd: #6D28D9; }
.lib-detail-card.t-resource { --c: #F59E0B; --cs: #FEF3C7; --cd: #B45309; }
.lib-detail-card .blob { position: absolute; top: -50px; right: -50px; width: 180px; height: 180px; border-radius: 50%; background: var(--cs); opacity: .55; }
.lib-detail-head { position: relative; display: flex; align-items: center; gap: 16px; }
.lib-detail-ic { width: 62px; height: 62px; border-radius: 18px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--cs), var(--np-surface, #fff)); box-shadow: inset 0 0 0 1px var(--cs); }
.lib-detail-ic i { width: 30px; height: 30px; color: var(--cd); }
.lib-detail h1 { position: relative; font-family: var(--np-font-chunky, 'Nunito', sans-serif); font-weight: 900; font-size: 30px; margin: 16px 0 8px; color: var(--np-ink, #0F172A); letter-spacing: -0.01em; }
.lib-detail .lead { position: relative; font-size: 16px; color: var(--np-ink-soft, #334155); margin: 0; }
.lib-detail .pills { position: relative; display: flex; gap: 8px; flex-wrap: wrap; margin-top: 4px; }
.lib-detail .cta { position: relative; display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.lib-detail .cta form { margin: 0; }

.lib-preview-head { font-family: var(--np-font-display, 'Plus Jakarta Sans', sans-serif); font-weight: 800; font-size: 16px; margin: 30px 0 12px; color: var(--np-ink, #0F172A); }
.lib-pcard { background: var(--np-surface, #fff); border: 1.5px solid var(--np-border, #F1F5F9); border-radius: 14px; padding: 16px 18px; margin-bottom: 10px; }
.lib-pcard .f { font-weight: 700; color: var(--np-ink, #0F172A); font-size: 15px; }
.lib-pcard .b { color: var(--np-ink-muted, #64748B); margin-top: 5px; font-size: 14px; }
.lib-locked { text-align: center; color: var(--np-ink-muted, #94a3b8); font-size: 13px; padding: 14px; border: 1.5px dashed var(--np-border-2, #E2E8F0); border-radius: 14px; }

.lib-resource-body { background: var(--np-surface, #fff); border: 1.5px solid var(--np-border, #F1F5F9); border-radius: 20px; padding: 28px; margin-top: 18px; }
.lib-resource-body img, .lib-resource-body table { max-width: 100%; height: auto; }

/* =============================== study ==================================== */
.lib-study-bar { display: flex; align-items: center; justify-content: space-between; padding: 14px 22px; background: var(--np-surface, #fff); border-bottom: 1.5px solid var(--np-border, #F1F5F9); position: sticky; top: 0; z-index: 5; }
.lib-study-bar a { color: var(--np-ink-muted, #64748B); text-decoration: none; font-weight: 700; font-size: 13px; }
.lib-study-bar a:hover { color: var(--np-brand-dark, #059669); }
.lib-study-bar .ttl { font-family: var(--np-font-display, 'Plus Jakarta Sans', sans-serif); font-weight: 800; font-size: 14px; color: var(--np-ink, #0F172A); }
.lib-study-wrap { max-width: 680px; margin: 0 auto; padding: 34px 20px; }
.lib-progress-track { height: 8px; background: var(--np-border, #F1F5F9); border-radius: 999px; overflow: hidden; margin-bottom: 22px; }
.lib-progress-fill { height: 100%; width: 0; background: var(--np-grad-bar, linear-gradient(90deg, #10B981, #059669)); border-radius: 999px; transition: width .25s ease; }
.lib-progress-label { text-align: center; font-size: 13px; color: var(--np-ink-muted, #94a3b8); font-weight: 600; margin-bottom: 14px; }

.lib-flashcard {
    background: var(--np-surface, #fff); border: 1.5px solid var(--np-border, #F1F5F9); border-radius: 24px; min-height: 290px;
    display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 38px; cursor: pointer;
    box-shadow: 0 12px 34px rgba(16,24,40,.07); user-select: none; text-align: center; transition: transform .12s;
}
.lib-flashcard:active { transform: scale(.99); }
.lib-flashcard .side { font-size: 12px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; color: var(--np-brand, #10B981); margin-bottom: 14px; }
.lib-flashcard .txt { font-family: var(--np-font-display, 'Plus Jakarta Sans', sans-serif); font-size: 25px; font-weight: 700; color: var(--np-ink, #0F172A); line-height: 1.35; }
.lib-flashcard .hint { color: var(--np-ink-muted, #94a3b8); font-size: 13px; margin-top: 14px; min-height: 18px; }
.lib-flip-hint { text-align: center; color: var(--np-ink-muted, #cbd5e1); font-size: 12px; margin-top: 12px; }
.lib-study-nav { display: flex; gap: 12px; justify-content: center; margin-top: 24px; }

.lib-quiz-card { background: var(--np-surface, #fff); border: 1.5px solid var(--np-border, #F1F5F9); border-radius: 22px; padding: 28px; box-shadow: 0 10px 28px rgba(16,24,40,.06); }
.lib-quiz-card h3 { font-family: var(--np-font-display, 'Plus Jakarta Sans', sans-serif); font-size: 20px; color: var(--np-ink, #0F172A); margin: 0 0 20px; line-height: 1.35; }
.lib-opt { display: flex; align-items: center; gap: 12px; width: 100%; text-align: left; background: var(--np-surface-2, #F8FAFC); border: 1.5px solid var(--np-border-2, #E2E8F0); border-radius: 14px; padding: 14px 16px; margin-bottom: 11px; font-size: 15px; cursor: pointer; color: var(--np-ink, #0F172A); font-family: inherit; transition: all .12s; }
.lib-opt:hover:not(:disabled) { border-color: var(--np-ai, #8B5CF6); background: var(--np-surface, #fff); }
.lib-opt .dot { width: 22px; height: 22px; border-radius: 50%; border: 2px solid var(--np-border-2, #CBD5E1); flex-shrink: 0; }
.lib-opt.correct { background: #DCFCE7; border-color: #22C55E; }
.lib-opt.correct .dot { border-color: #22C55E; background: #22C55E; }
.lib-opt.wrong { background: #FEE2E2; border-color: #EF4444; }
.lib-opt.wrong .dot { border-color: #EF4444; background: #EF4444; }
.lib-expl { margin-top: 14px; font-size: 14px; color: var(--np-ink-soft, #334155); background: var(--np-surface-2, #F1F5F9); border-radius: 12px; padding: 14px 16px; display: none; }
.lib-expl.show { display: block; }

.lib-done { background: var(--np-surface, #fff); border: 1.5px solid var(--np-border, #F1F5F9); border-radius: 24px; padding: 44px; text-align: center; box-shadow: 0 12px 30px rgba(16,24,40,.07); }
.lib-done .em { font-size: 50px; }
.lib-done h2 { font-family: var(--np-font-chunky, 'Nunito', sans-serif); font-weight: 900; font-size: 27px; color: var(--np-ink, #0F172A); margin: 10px 0 8px; }
.lib-done p { color: var(--np-ink-soft, #475569); font-size: 16px; margin: 0 0 6px; }
.lib-done .actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 22px; }

/* =============================== join wall ================================ */
.lib-join-page { font-family: var(--np-font-sans, 'Inter', sans-serif); background: radial-gradient(70% 60% at 50% 0%, color-mix(in srgb, var(--np-brand, #10B981) 12%, transparent), transparent 60%), var(--np-paper, #FAFAF9); margin: 0; min-height: 100vh; }
.lib-join-wrap { max-width: 560px; margin: 0 auto; padding: 72px 20px; text-align: center; }
.lib-join-card { background: var(--np-surface, #fff); border: 1.5px solid var(--np-border, #F1F5F9); border-radius: 26px; padding: 48px 40px; box-shadow: 0 26px 60px rgba(16,24,40,.12); }
.lib-join-badge { width: 74px; height: 74px; border-radius: 22px; margin: 0 auto 18px; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--np-brand-soft, #ECFDF5), #fff); box-shadow: inset 0 0 0 1.5px var(--np-brand-soft, #D1FAE5); }
.lib-join-badge i { width: 36px; height: 36px; color: var(--np-brand-dark, #059669); }
.lib-join-card h1 { font-family: var(--np-font-chunky, 'Nunito', sans-serif); font-weight: 900; font-size: 28px; color: var(--np-ink, #0F172A); margin: 0 0 12px; }
.lib-join-card p { font-size: 16px; color: var(--np-ink-soft, #475569); margin: 0 0 8px; line-height: 1.55; }
.lib-join-fine { font-size: 13px; color: var(--np-ink-muted, #94a3b8); margin-top: 8px; }
.lib-join-actions { display: flex; flex-direction: column; gap: 12px; margin-top: 28px; }
.lib-join-actions .np-btn { width: 100%; justify-content: center; padding: 14px; font-size: 16px; }

/* =============================== responsive ============================== */
@media (max-width: 760px) {
    .lib-hero { padding: 30px 24px; }
    .lib-hero h1 { font-size: 29px; }
    .lib-toolbar { flex-direction: column; align-items: stretch; }
    .lib-tabs { width: 100%; justify-content: space-between; }
    .lib-search .lib-input { min-width: 0; width: 100%; }
    .lib-grid { grid-template-columns: 1fr; }
}