:root{--primary: #7C5CFF;--primary-hover: #6B4BF5;--primary-dark: #5A3FE0;--primary-subtle: #EEE9FF;--primary-contrast: #FFFFFF;--text: #1C1830;--surface: #FFFFFF;--background: #F7F5FC;--destructive: #C42A3B;--destructive-subtle: #FFE4E6;--success: #11804F;--success-subtle: #DDF6EA;--success-mint: #BDEFD6;--alert: #FFAA1A;--alert-dark: #7A4E00;--alert-subtle: #FFF1D1;--alert-yellow: #FFE6A6;--border-color: #ECE8F5;--border-strong: #E6E2F0;--color-primary: #7C5CFF;--color-primary-contrast: #FFFFFF;--color-text: #1C1830;--color-surface: #FFFFFF;--color-background: #F7F5FC;--color-destructive: #C42A3B;--color-success: #11804F;--color-alert: #FFAA1A;--color-border: #ECE8F5;--bg: #F7F5FC;--bg-subtle: #F1EDFF;--bg-section: #F7F5FC;--fg: #1C1830;--fg-strong: #1C1830;--fg-muted: #5E5878;--fg-subtle: #8A85A3;--fg-faint: #B8B3CB;--border: #ECE8F5;--hover: #F1EDFF;--radius-sm: 8px;--radius: 14px;--radius-lg: 18px;--radius-xl: 24px;--radius-2xl: 28px;--shadow-sm: 0 1px 3px 0 rgba(40, 30, 90, 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transparent;border-top:8px solid var(--border-color)}.celebration-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);z-index:600;display:grid;place-items:center;padding:16px;animation:fadeIn .2s ease}.celebration-modal-card{background:var(--surface);border:1px solid var(--border-color);border-radius:var(--radius-xl);width:100%;max-width:480px;padding:36px 28px 28px;text-align:center;box-shadow:var(--shadow-xl);position:relative;overflow:hidden;animation:modalScale .28s cubic-bezier(.16,1,.3,1)}.confetti-layer{position:absolute;top:0;left:0;right:0;height:120px;pointer-events:none;background:radial-gradient(circle,rgba(250,181,21,.15) 0%,transparent 70%)}.celebration-title{font-size:24px;font-weight:700;color:var(--fg-strong);margin-top:12px;margin-bottom:6px}.celebration-sub{font-size:14px;color:var(--fg-muted);margin-bottom:24px}.social-tabs{display:flex;border-bottom:1px solid var(--border-color);margin-bottom:24px;gap:20px}.social-tab-btn{padding:12px 4px;font-size:14px;font-weight:500;color:var(--fg-muted);border-bottom:2px solid transparent;transition:all .18s ease;cursor:pointer;background:none;border-radius:0}.social-tab-btn:hover{color:var(--fg-strong)}.social-tab-btn.active{color:var(--primary);font-weight:600;border-bottom-color:var(--primary)}.activity-feed{display:flex;flex-direction:column;gap:16px;max-width:680px;margin:0 auto}.activity-card{background:var(--surface);border:1px solid var(--border-color);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow-sm);transition:border-color .18s ease}.activity-card:hover{border-color:#d0d0d0}.activity-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.activity-user-group{display:flex;align-items:center;gap:12px}.activity-user-name{font-size:14px;font-weight:600;color:var(--fg-strong)}.activity-time{font-size:12px;color:var(--fg-subtle)}.activity-title{font-size:15px;font-weight:600;color:var(--text);margin-bottom:6px}.activity-desc{font-size:13.5px;color:var(--fg-muted);line-height:1.5;margin-bottom:14px}.activity-stats-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}.activity-stat-tag{display:inline-flex;align-items:center;gap:5px;padding:3px 10px;border-radius:999px;background:var(--background);border:1px solid var(--border-color);font-size:12px;font-weight:500;color:var(--text)}.activity-foot{display:flex;align-items:center;justify-content:space-between;padding-top:12px;border-top:1px solid var(--border-color)}.kudos-btn{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:999px;font-size:13px;font-weight:500;border:1px solid var(--border-color);background:var(--surface);color:var(--text);transition:all .16s cubic-bezier(.175,.885,.32,1.275)}.kudos-btn:hover{background:#f7f7f7;border-color:#d0d0d0}.kudos-btn.kudos-active{background:#fff8e7;border-color:var(--alert);color:#b47800;font-weight:600;transform:scale(1.04)}.confetti-burst{position:absolute;top:0;left:0;right:0;bottom:0;pointer-events:none;overflow:hidden;border-radius:var(--radius-xl);z-index:0}.confetti-piece{position:absolute;top:-12px;opacity:.95;animation:confetti-fall ease-in forwards}@keyframes confetti-fall{0%{transform:translateY(0) rotate(0) scale(1);opacity:1}80%{opacity:.9}to{transform:translateY(380px) rotate(600deg) scale(.5);opacity:0}}.done-stat--reviewed .num{color:var(--primary)}.done-stat--retention .num{color:#059669}.done-stat--again .num{color:var(--destructive)}.done-stat--time .num{color:var(--primary)}.grade-btn{transition:all .18s cubic-bezier(.16,1,.3,1)}.grade-btn:active{transform:scale(.96)}.grade-btn--again:hover{border-color:var(--destructive);background:#fff5f6;color:var(--destructive)}.grade-btn--again:hover .ival,.grade-btn--again:hover .key{color:var(--destructive)}.grade-btn--hard:hover{border-color:var(--alert);background:#fffdf0;color:#b47800}.grade-btn--hard:hover .ival,.grade-btn--hard:hover .key{color:#b47800}.grade-btn--good:hover{border-color:var(--primary);background:var(--primary-subtle);color:var(--primary)}.grade-btn--good:hover .ival,.grade-btn--good:hover .key{color:var(--primary)}.grade-btn--easy:hover{border-color:var(--success);background:var(--success-subtle);color:var(--success)}.grade-btn--easy:hover .ival,.grade-btn--easy:hover .key{color:var(--success)}.deck-detail-head{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:24px}.deck-hero-study-btn{height:44px;padding:0 24px;font-size:14.5px;font-weight:700;border-radius:14px;display:inline-flex;align-items:center;gap:8px;box-shadow:0 4px 14px #4f46e540}.deck-hero-study-btn:hover{transform:translateY(-1px);box-shadow:0 6px 18px #4f46e559}.deck-options-dropdown{position:relative;display:inline-block}.deck-options-btn{width:36px;height:36px;padding:0;display:grid;place-items:center;border-radius:var(--radius-sm);color:var(--fg-muted)}.deck-options-btn:hover{color:var(--fg);border-color:var(--border-strong)}.deck-options-menu{position:absolute;top:calc(100% + 6px);right:0;min-width:200px;background:#fff;border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow-lg);padding:6px;z-index:120;display:flex;flex-direction:column;gap:2px;animation:fadeIn .15s ease}.deck-options-item{display:flex;align-items:center;gap:8px;padding:8px 12px;border-radius:8px;font-size:13px;font-weight:500;color:var(--fg);width:100%;text-align:left;transition:background .12s;cursor:pointer}.deck-options-item:hover{background:var(--bg-subtle)}.deck-options-item.danger{color:var(--destructive)}.deck-options-item.danger:hover{background:#fff5f5}@media (max-width: 640px){.deck-detail-head{flex-direction:column;align-items:stretch;gap:14px}.deck-detail-hero-actions{width:100%}.deck-hero-study-btn{width:100%;height:48px;justify-content:center;box-shadow:0 4px 14px #4f46e547}}.pilha-page{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--bg);color:var(--fg);font-family:var(--sans);overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch}.pilha-container{width:100%;max-width:520px;margin:0 auto;min-height:100vh;position:relative}.bottom-tab-bar{display:flex!important;position:fixed!important;left:50%!important;right:auto!important;transform:translate(-50%)!important;bottom:20px!important;width:calc(100% - 32px)!important;max-width:440px!important;margin:0!important;height:66px!important;border-radius:24px!important;background:#fffffff5!important;box-shadow:0 12px 32px -12px #281e5a59!important;backdrop-filter:blur(16px)!important;-webkit-backdrop-filter:blur(16px)!important;align-items:center!important;justify-content:space-around!important;padding:0 8px!important;z-index:1000!important;border:1px solid rgba(236,232,245,.8)!important}.bottom-tab-item{width:44px;height:44px;display:grid;place-items:center;color:#8a85a3;border:none;background:transparent;cursor:pointer;border-radius:16px;transition:all .18s cubic-bezier(.16,1,.3,1);-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;padding:0}.bottom-tab-item:active{transform:scale(.92)}.bottom-tab-active-pill{display:inline-flex;align-items:center;gap:6px;height:44px;padding:0 16px;border-radius:16px;background:#eee9ff;color:#5a3fe0;font-family:var(--sans);font-weight:700;font-size:14px;line-height:1;letter-spacing:-.01em;white-space:nowrap;animation:tabPillIn .2s cubic-bezier(.16,1,.3,1)}@keyframes tabPillIn{0%{opacity:.6;transform:scale(.92)}to{opacity:1;transform:scale(1)}}