:root{--primitive-green-900:#2f5549;--primitive-green-700:#3d6b5e;--primitive-green-600:#4a7c6a;--primitive-green-500:#6b9a82;--primitive-green-400:#8fb5a0;--primitive-green-success:#2f7a4f;--primitive-green-success-app:#4a8f65;--primitive-public-ink:#161922;--primitive-public-text:#2a3142;--primitive-public-text-secondary:#5c6478;--primitive-public-text-tertiary:#8b93a7;--primitive-public-border:#e8e6e1;--primitive-public-border-strong:#d4d1ca;--primitive-public-border-hover:#cac6be;--primitive-public-border-muted:#eceae5;--primitive-public-bg:#faf9f7;--primitive-public-bg-wash:#f5f4f1;--primitive-public-bg-hero:#fdfcfa;--primitive-public-surface:#fff;--primitive-public-skeleton:#eceff5;--primitive-public-skeleton-mid:#f5f7fa;--primitive-public-skeleton-bar:#e8ebf2;--primitive-app-bg:#f7f6f4;--primitive-app-bg-soft:#efede9;--primitive-app-bg-gradient-end:#f3f1ee;--primitive-app-surface:#fffcf8;--primitive-app-text:#1c2421;--primitive-app-text-secondary:#6b756f;--primitive-app-border:#ddd6cb;--primitive-app-panel:#fffcf8c7;--primitive-app-panel-strong:#fffcf8d1;--primitive-ambient-top:#eef4ef;--primitive-ambient-mid:#e8f0ea;--primitive-ambient-fade:#eef5f0;--primitive-ambient-deep:#d8e8de;--primitive-logo-bg:#f5f0e8;--primitive-leaf-dark:#2d6349;--primitive-leaf-mid:#3d7a5c;--primitive-leaf-light:#5a9e78;--primitive-error-public:#b42318;--primitive-error-app:#c45c4a;--primitive-warning:#c4873a;--primitive-master:#7a6b9e;--primitive-white:#fff;--font-sans:"Plus 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4rem);--text-body-public:.9375rem;--text-body-lg:1rem;--text-body-xl:1.125rem;--text-nav-brand:1.2rem;--text-auth-brand:1.15rem;--leading-tight:1.15;--leading-snug:1.3;--leading-normal:1.55;--leading-relaxed:1.65;--tracking-tight:-.03em;--tracking-display:-.02em;--tracking-eyebrow:.06em;--tracking-eyebrow-wide:.08em;--tracking-pill:.04em;--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-5:1.25rem;--space-6:1.5rem;--space-8:2rem;--space-10:2.5rem;--space-12:3rem;--space-14:3.5rem;--space-16:4rem;--space-18:4.5rem;--space-20:5rem;--space-section-y:var(--space-16);--space-section-gap:var(--space-12);--radius-xs:6px;--radius-sm:8px;--radius-md:10px;--radius-lg:14px;--radius-xl:16px;--radius-2xl:20px;--radius-pill:999px;--radius-full:50%;--radius-sm-public:var(--radius-sm);--radius-sm-app:var(--radius-sm);--radius-md-app:var(--radius-md);--elevation-sm:0 1px 2px #1619220a;--elevation-md:0 2px 8px #1619220d, 0 12px 32px #1619220f;--elevation-lg:0 4px 16px #1619220f, 0 24px 48px #16192214;--elevation-card:0 1px 3px #1619220a, 0 8px 24px #1619220d;--ease-default:cubic-bezier(.4, 0, .2, 1);--duration-fast:.15s;--duration-normal:.22s;--layout-max-public:1080px;--layout-max-auth:400px;--layout-max-deck:720px}[data-theme=app]{--color-primary:var(--primitive-green-700);--color-primary-hover:var(--primitive-green-900);--color-secondary:var(--primitive-app-text-secondary);--color-background:var(--primitive-app-bg);--color-background-soft:var(--primitive-app-bg-soft);--color-surface:var(--primitive-app-surface);--color-surface-raised:var(--primitive-white);--color-text-primary:var(--primitive-app-text);--color-text-secondary:var(--primitive-app-text-secondary);--color-border:var(--primitive-app-border);--color-success:var(--primitive-green-success-app);--color-error:var(--primitive-error-app);--color-warning:var(--primitive-warning);--color-master:var(--primitive-master);--color-on-primary:var(--primitive-white);--color-primary-soft:#3d6b5e1a;--color-primary-glow:#3d6b5e2e;--color-panel:var(--primitive-app-panel);--color-panel-strong:var(--primitive-app-panel-strong);--shadow-sm:0 2px 8px #1c24210f;--shadow-md:0 8px 24px #1c242114;--gradient-brand:linear-gradient(145deg, var(--color-primary), var(--color-primary-hover));--gradient-brand-sage:linear-gradient(145deg, var(--primitive-green-400), var(--color-primary));--gradient-brand-vertical:linear-gradient(180deg, var(--primitive-green-400), var(--color-primary));--gradient-card-back:linear-gradient(160deg, var(--color-surface), var(--primitive-app-bg-gradient-end));--gradient-ambient:linear-gradient(180deg, var(--primitive-app-bg) 0%, var(--primitive-ambient-top) 50%, var(--primitive-ambient-mid) 100%);--gradient-ambient-radial-a:radial-gradient(ellipse 80% 45% at 50% 0%, #8fb5a014, transparent 55%);--gradient-ambient-radial-b:radial-gradient(ellipse 60% 40% at 50% 100%, #3d6b5e0a, transparent 50%);--gradient-leaf:linear-gradient(145deg, var(--primitive-leaf-light) 0%, var(--primitive-leaf-mid) 45%, var(--primitive-leaf-dark) 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1px 2px #1e24330a;--shadow-md:0 4px 6px #1e24330a, 0 18px 40px #1e243317;--shadow-card:0 4px 20px #2e385614;--shadow-card-hover:0 8px 32px #2e38561f;--shadow-form:0 8px 24px #2e385614;--shadow-tab:0 1px 4px #2e385614;--shadow-primary:0 2px 8px #3d6b5e2e;--shadow-primary-hover:0 4px 16px #3d6b5e38;--gradient-hero:linear-gradient(180deg, var(--color-background-hero) 0%, var(--color-background-wash) 100%);--gradient-hero-glow-a:radial-gradient(ellipse 70% 55% at 50% -10%, #3d6b5e17, transparent 60%);--gradient-hero-glow-b:radial-gradient(circle at 85% 20%, #939bb41f, transparent 35%);--gradient-hero-glow-c:radial-gradient(circle at 10% 80%, #3d6b5e0f, transparent 40%);--gradient-skeleton:linear-gradient(90deg, var(--primitive-public-skeleton) 0%, var(--primitive-public-skeleton-mid) 50%, var(--primitive-public-skeleton) 100%);--font-body:var(--font-sans);--radius-sm:var(--radius-sm);--radius-md:var(--radius-md)}[data-theme=public],[data-theme=app]{--font-body:var(--font-sans);--font-heading:var(--font-display);--shadow-sm:var(--elevation-sm);--shadow-md:var(--elevation-md);--shadow-lg:var(--elevation-lg);--color-state-new:var(--primitive-public-text-tertiary);--color-state-new-bg:#939bb424;--color-state-learning:var(--primitive-warning);--color-state-learning-bg:#c4873a24;--color-state-review:var(--primitive-green-700);--color-state-review-bg:#3d6b5e1f;--color-state-mastered:var(--primitive-master);--color-state-mastered-bg:#7a6b9e24}[data-theme=public] h1,[data-theme=public] h2,[data-theme=public] h3,[data-theme=app] h1,[data-theme=app] h2,[data-theme=app] h3{font-family:var(--font-heading);letter-spacing:var(--tracking-display);font-weight:600;line-height:var(--leading-snug)}[data-theme=public] h1,[data-theme=app] 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0;min-height:2.5rem;padding-inline:.75rem;font-weight:500}.sg-btn--ghost:hover:not(:disabled){color:var(--color-text-primary,var(--text))}.sg-panel{background:var(--color-surface,var(--surface));border:1px solid var(--color-border-muted,var(--color-border,var(--border)));border-radius:var(--radius-lg);box-shadow:var(--elevation-card,var(--shadow-sm));padding:1.35rem 1.4rem}.sg-panel__title{font-family:var(--font-body);font-size:var(--text-sm);color:var(--color-text-tertiary,var(--color-text-secondary,var(--muted)));text-transform:none;letter-spacing:.01em;margin:0 0 1rem;font-weight:500}.sg-page-header{margin-bottom:var(--space-10);padding-bottom:var(--space-8);border-bottom:1px solid var(--color-border-muted,var(--color-border,var(--border)))}.sg-page-header__eyebrow{font-family:var(--font-body);font-size:var(--text-sm);letter-spacing:.01em;text-transform:none;color:var(--color-text-tertiary,var(--muted));margin-bottom:var(--space-4);font-weight:500;display:block}.sg-page-header 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span{text-align:center;color:var(--color-text-tertiary,var(--muted));font-size:.68rem;font-weight:500}.sg-streak__grid{grid-template-columns:repeat(7,1fr);gap:.3rem;display:grid}.sg-streak__day{aspect-ratio:1;border-radius:var(--radius-sm);background:var(--color-background-wash,var(--color-background-soft,var(--bg-soft)));color:var(--color-text-tertiary,var(--muted));font-variant-numeric:tabular-nums;place-items:center;font-size:.65rem;font-weight:500;display:grid}.sg-streak__day.is-on{background:var(--color-primary);color:var(--color-on-primary)}.sg-week{grid-template-columns:repeat(7,1fr);align-items:end;gap:.4rem;height:96px;display:grid}.sg-week__col{grid-template-rows:1fr auto auto;justify-items:center;gap:.25rem;height:100%;display:grid}.sg-week__bar{background:var(--color-primary);opacity:.75;width:100%;max-width:2rem;min-height:4px;transition:height .4s var(--ease-default,ease);border-radius:4px 4px 0 0;align-self:end}.sg-week__col span{color:var(--color-text-tertiary,var(--muted));font-size:.68rem;font-weight:500}.sg-week__col em{color:var(--color-text-secondary,var(--muted));font-variant-numeric:tabular-nums;min-height:.8em;font-size:.65rem;font-style:normal;font-weight:500}.sg-flashcard{perspective:1400px;background:0 0;border:0;width:100%;padding:0}.sg-flashcard--default{min-height:min(48vh,360px)}.sg-flashcard--compact{min-height:240px}.sg-flashcard__inner{width:100%;height:100%;min-height:inherit;transform-style:preserve-3d;transition:transform .45s var(--ease-default,ease);position:relative}.sg-flashcard.is-flipped .sg-flashcard__inner{transform:rotateY(180deg)}.sg-flashcard__face{backface-visibility:hidden;border-radius:var(--radius-xl);text-align:center;border:1px solid var(--color-border-muted,var(--color-border,var(--border)));background:var(--color-surface,var(--surface));box-shadow:var(--elevation-card,var(--shadow-md));align-content:center;justify-items:center;gap:.75rem;padding:2.5rem 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var(--duration-fast) ease, border-color var(--duration-fast) ease, color var(--duration-fast) ease;gap:.15rem;padding:.75rem .5rem;display:grid}.sg-rating-btn:hover:not(:disabled){background:var(--color-background-wash,var(--bg))}.sg-rating-btn:disabled{cursor:not-allowed}.sg-rating-btn strong{font-weight:600;font-size:var(--text-base)}.sg-rating-btn span{color:var(--color-text-tertiary,var(--muted));font-size:var(--text-xs);font-variant-numeric:tabular-nums}.sg-rating-btn--forgot:hover:not(:disabled){border-color:var(--color-error,var(--danger));color:var(--color-error,var(--danger))}.sg-rating-btn--struggled:hover:not(:disabled){border-color:var(--color-warning,var(--warn));color:var(--color-warning,var(--warn))}.sg-rating-btn--recalled:hover:not(:disabled){border-color:var(--color-success,var(--ok));color:var(--color-success,var(--ok))}.sg-rating-btn--mastered:hover:not(:disabled){border-color:var(--color-primary,var(--master));color:var(--color-primary,var(--master))}.sg-card-nav{justify-content:center;gap:var(--space-3);display:flex}.sg-card-nav__btn{border-radius:var(--radius-md);border:1px solid var(--color-border-muted,var(--border));background:var(--color-surface,var(--surface));min-width:2.75rem;min-height:2.75rem;color:var(--color-text-secondary,var(--muted));font-size:var(--text-base);cursor:pointer;transition:background var(--duration-fast) ease, border-color var(--duration-fast) ease, color var(--duration-fast) ease;padding:0 1rem;font-weight:600}.sg-card-nav__btn:hover:not(:disabled){background:var(--color-background-wash,var(--bg));color:var(--color-text-primary,var(--text))}.sg-card-nav__btn:disabled{opacity:.35;cursor:not-allowed}.sg-card-nav__btn--primary{background:var(--color-primary);border-color:var(--color-primary);color:var(--color-on-primary)}.sg-card-nav__btn--primary:hover:not(:disabled){background:var(--color-primary-hover);border-color:var(--color-primary-hover);color:var(--color-on-primary)}.sg-badge-soft{font-size:var(--text-xs);color:var(--color-primary);background:var(--color-primary-soft,var(--accent-soft));border-radius:var(--radius-sm);align-items:center;padding:.3rem .65rem;font-weight:600;display:inline-flex}.sg-deck-card{background:var(--color-surface);border:1px solid var(--color-border-muted,var(--color-border));border-radius:var(--radius-xl);min-height:12rem;color:inherit;box-shadow:var(--elevation-card);transition:border-color var(--duration-normal) ease, box-shadow 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.55rem}.sg-deck-card__desc{font-size:var(--text-body-public);line-height:var(--leading-relaxed);color:var(--color-text-secondary);margin:0 0 var(--space-5);-webkit-line-clamp:2;-webkit-box-orient:vertical;flex:1;display:-webkit-box;overflow:hidden}.sg-deck-card__action{font-size:var(--text-sm);color:var(--color-primary);letter-spacing:-.01em;align-items:center;gap:.4rem;margin-top:auto;font-weight:600;display:inline-flex}.sg-deck-card:hover .sg-deck-card__action{color:var(--color-primary-hover)}.sg-empty{text-align:center;padding:var(--space-12) var(--space-8);border:1px solid var(--color-border-muted,var(--color-border,var(--border)));border-radius:var(--radius-xl);background:var(--color-surface,var(--surface));box-shadow:var(--elevation-sm)}.sg-empty h3{font-family:var(--font-heading);font-size:var(--text-2xl);margin-bottom:var(--space-3);color:var(--color-text-display,var(--color-text-primary));font-weight:600}.sg-empty p{color:var(--color-text-secondary,var(--muted));font-size:var(--text-body-lg);line-height:var(--leading-relaxed);margin-bottom:var(--space-6);max-width:32rem;margin-inline:auto}.sg-inline-form{gap:var(--space-3);flex-wrap:wrap;align-items:stretch;display:flex}.sg-inline-form .sg-input{flex:1;min-width:12rem}.sg-inline-form .sg-btn{min-height:2.75rem;font-size:var(--text-base);padding-inline:1.15rem}.sg-form-stack{gap:var(--space-3);display:grid}.sg-input,.sg-textarea{border:1px solid var(--color-border-muted,var(--color-border,var(--border)));background:var(--color-surface-raised,var(--color-surface,var(--surface)));border-radius:var(--radius-md);width:100%;color:var(--color-text-primary,var(--text));font-family:var(--font-body);font-size:var(--text-base);transition:border-color var(--duration-normal) ease, box-shadow var(--duration-normal) ease;outline:none;padding:.65rem 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#2d634933}.leaves__leaf:after{content:"";border-radius:inherit;background:linear-gradient(145deg,#ffffff26,#0000);position:absolute;inset:20% 30%}@keyframes leaf-fall{0%{opacity:0;transform:translateY(-5vh)rotate(0)scale(.8)}10%{opacity:.45}90%{opacity:.45}to{opacity:0;transform:translateY(108vh) translateX(var(--drift)) rotate(var(--spin)) scale(1)}}@media (prefers-reduced-motion:reduce){.leaves{display:none}}.shell{width:100%;max-width:1200px;padding:0 var(--space-6) var(--space-10);min-height:100vh;margin:0 auto}.shell__header{align-items:center;gap:var(--space-4);margin-bottom:var(--space-6);border-bottom:1px solid var(--color-border-muted,var(--border));z-index:10;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#f7f6f4e0;padding:.85rem 0;display:flex;position:sticky;top:0}.shell__brand{color:inherit;align-items:center;text-decoration:none;display:inline-flex}.shell__brand .logo__name{font-size:var(--text-nav-brand);letter-spacing:var(--tracking-tight);color:var(--color-text-primary,var(--text));font-weight:700}.shell__nav{gap:var(--space-1);margin-left:auto;display:flex}.shell__nav a{border-radius:var(--radius-md);color:var(--color-text-secondary,var(--muted));font-size:var(--text-base);transition:color var(--duration-normal) ease, background var(--duration-normal) ease;padding:.45rem .85rem;font-weight:500;text-decoration:none}.shell__nav a:hover{color:var(--color-text-primary,var(--text));background:var(--color-primary-soft,var(--accent-soft))}.shell__nav a.active{color:var(--color-primary,var(--accent));background:var(--color-primary-soft,var(--accent-soft))}.shell__user{align-items:center;gap:var(--space-2);display:flex}.shell__name{color:var(--color-text-secondary,var(--muted));font-size:var(--text-sm);text-overflow:ellipsis;white-space:nowrap;max-width:8rem;font-weight:500;overflow:hidden}.shell__logout{min-height:2.25rem!important;font-size:var(--text-sm)!important;padding:.35rem .65rem!important}.shell__main{min-height:calc(100vh - 5.5rem)}@media (width<=768px){.shell{padding-inline:var(--space-4)}}@media (width<=520px){.shell__nav a{font-size:var(--text-sm);padding:.4rem .55rem}.shell__name,.shell__brand .logo__name{display:none}}.auth-page{background:var(--color-background);min-height:100dvh;color:var(--color-text-primary)}.auth{min-height:100dvh;padding:var(--space-8) var(--space-4);place-items:center;display:grid;position:relative}.auth__back{font-size:var(--text-body-public);color:var(--color-text-secondary);padding:.35rem var(--space-2);border-radius:var(--radius-sm);transition:color var(--duration-fast) ease, background var(--duration-fast) ease;font-weight:500;text-decoration:none;position:absolute;top:1.25rem;left:1.25rem}.auth__back:hover{color:var(--color-text-primary);background:var(--color-surface)}.auth--narrow{max-width:var(--layout-max-auth);margin:0 auto}.auth__form{width:100%;max-width:var(--layout-max-auth);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-form);gap:.85rem;padding:1.75rem;display:grid}.auth__form form{gap:.85rem;display:grid}.auth__brand-row{justify-content:center;margin-bottom:.35rem;display:flex}.auth__brand-row .logo__name{font-size:var(--text-auth-brand);color:var(--color-text-primary);font-weight:700}.auth__form 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var(--color-border);background:var(--color-surface);color:var(--color-text-primary);font-size:var(--text-base);place-items:center;font-weight:600;text-decoration:none;display:grid}.auth__google:hover{background:var(--color-background)}.auth__free-deck{text-align:center;color:var(--color-primary);margin-top:.15rem;font-size:.82rem;font-weight:600;text-decoration:none;display:block}.auth__free-deck:hover{text-decoration:underline}.auth__pending{gap:.8rem;display:grid}.auth__pending p{color:var(--color-text-secondary);font-size:var(--text-base);line-height:var(--leading-normal)}.auth__tabs{background:var(--color-background);border-radius:var(--radius-md);grid-template-columns:1fr 1fr;gap:.2rem;padding:.18rem;display:grid}.auth__tabs button{padding:var(--space-2);border-radius:var(--radius-sm);color:var(--color-text-secondary);font-size:var(--text-md);background:0 0;border:0;font-weight:600}.auth__tabs button.is-active{background:var(--color-surface);color:var(--color-text-primary);box-shadow:var(--shadow-tab)}.auth__form label{font-size:var(--text-sm);color:var(--color-text-secondary);gap:.3rem;font-weight:500;display:grid}.auth__form input{border:1px solid var(--color-border);background:var(--color-surface);border-radius:var(--radius-sm);padding:.6rem var(--space-3);color:var(--color-text-primary);font-size:var(--text-base);transition:border-color var(--duration-fast), box-shadow var(--duration-fast);outline:none}.auth__form input:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-glow)}.auth__submit{border-radius:var(--radius-pill);padding:.7rem var(--space-4);background:var(--color-primary);color:var(--color-on-primary);font-size:var(--text-base);transition:background var(--duration-fast), transform var(--duration-fast);border:0;margin-top:.15rem;font-weight:600}.auth__submit:hover:not(:disabled){background:var(--color-primary-hover);transform:translateY(-1px)}.auth__submit:disabled{opacity:.6;cursor:wait}.auth__error{color:var(--color-error);font-size:var(--text-md)}.auth__submit--center{text-align:center}.dash{gap:var(--space-5);grid-template-columns:1fr 300px;align-items:start;display:grid}.dash__main{gap:var(--space-5);min-width:0;display:grid}.dash__main .sg-page-header{border-bottom:0;margin-bottom:0;padding-bottom:0}.dash__aside{gap:var(--space-4);align-content:start;display:grid;position:sticky;top:4.5rem}.dash__due{flex:1}.due-list{gap:var(--space-3);margin:0;padding:0;list-style:none;display:grid}.due-list li{justify-content:space-between;align-items:center;gap:var(--space-4);padding-bottom:var(--space-3);border-bottom:1px solid var(--color-border-muted,var(--border));display:flex}.due-list li:last-child{border-bottom:0;padding-bottom:0}.due-list strong{font-size:var(--text-base);color:var(--color-text-primary,var(--text));font-weight:600;display:block}.due-list span{color:var(--color-text-secondary,var(--muted));font-size:var(--text-sm)}.due-list__link{font-family:var(--font-heading);color:var(--color-primary,var(--accent));font-weight:600;font-size:var(--text-base);font-variant-numeric:tabular-nums;text-decoration:none}.due-list__link:hover{color:var(--color-primary-hover,var(--accent-hover))}@media (width<=900px){.dash{grid-template-columns:1fr}.dash__aside{gap:var(--space-4);grid-template-columns:1fr 1fr;position:static}}@media (width<=600px){.dash__aside{grid-template-columns:1fr}}.folder{gap:var(--space-5);display:grid}.folder .sg-page-header{border-bottom:0;margin-bottom:0;padding-bottom:0}.folder__layout{gap:var(--space-5);grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);align-items:start;display:grid}.folder__deck-form{margin-bottom:var(--space-4)}.folder__deck-meta{margin:-.35rem 0 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strong{font-family:var(--font-heading);font-size:var(--text-base);color:var(--color-text-primary,var(--text));font-weight:600;display:block}.deck-list span{color:var(--color-text-secondary,var(--muted));font-size:var(--text-sm)}.deck-list__actions{align-items:center;gap:var(--space-1);padding:0 .35rem .35rem;display:flex}.deck-list__review{min-height:2.25rem!important;font-size:var(--text-sm)!important;padding-inline:.65rem!important}.card-list{gap:0;margin:0;padding:0;list-style:none;display:grid}.card-list li{justify-content:space-between;gap:var(--space-4);padding:var(--space-4) 0;border-bottom:1px solid var(--color-border-muted,var(--border));flex-wrap:wrap;display:flex}.card-list li:last-child{border-bottom:0}.card-list li.is-pending{opacity:.72}.card-list__body{gap:var(--space-2);flex:1;min-width:0;display:grid}.card-list__body strong{font-size:var(--text-base);color:var(--color-text-primary,var(--text));font-weight:600;line-height:var(--leading-snug)}.card-list__body span{color:var(--color-text-secondary,var(--muted));font-size:var(--text-sm);line-height:var(--leading-relaxed)}.card-list__pending{color:var(--color-text-secondary,var(--muted));font-style:italic;font-size:var(--text-sm)}.card-list__actions{gap:var(--space-1);align-items:start;display:flex}.card-edit{width:100%}.card-edit__actions{gap:var(--space-3);flex-wrap:wrap;display:flex}.card-list__footer{align-items:center;gap:var(--space-3);margin-top:var(--space-5);padding-top:var(--space-5);border-top:1px solid var(--color-border-muted,var(--border));flex-direction:column;display:flex}.card-list__footer .page-muted{font-size:var(--text-sm);margin:0}@media (width<=900px){.folder__layout{grid-template-columns:1fr}}@media (width<=640px){.card-edit__actions .sg-btn{width:auto}}.library{gap:var(--space-5);display:grid}.library 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span{color:var(--color-text-secondary,var(--muted));font-size:var(--text-sm);font-variant-numeric:tabular-nums}@media (width<=520px){.path-list__link{align-items:flex-start;gap:var(--space-1);flex-direction:column}}.lang-toggle{border:1px solid var(--border);background:var(--surface);border-radius:999px;display:inline-flex;overflow:hidden}.lang-toggle__btn{font:inherit;letter-spacing:.04em;color:var(--muted);cursor:pointer;background:0 0;border:0;padding:.35rem .7rem;font-size:.72rem;font-weight:600}.lang-toggle__btn+.lang-toggle__btn{border-inline-start:1px solid var(--border)}.lang-toggle__btn.is-active{background:var(--color-primary);color:var(--color-on-primary)}.lang-toggle__btn:hover:not(.is-active){color:var(--text);background:var(--accent-soft)}.public-layout{background:var(--color-background);min-height:100dvh;color:var(--color-text-primary)}.public-nav{padding:.85rem 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.55rem;font-weight:600;text-decoration:none}.public-nav__link:hover{color:var(--color-text-primary)}.public-nav__signup{font-size:var(--text-body-lg);color:var(--color-on-primary);background:var(--color-primary);border-radius:var(--radius-md);box-shadow:var(--shadow-primary,var(--elevation-sm));transition:background var(--duration-normal) ease, box-shadow var(--duration-normal) ease;white-space:nowrap;padding:.6rem 1.25rem;font-weight:600;text-decoration:none}.public-nav__signup:hover{background:var(--color-primary-hover);box-shadow:var(--shadow-primary-hover,var(--elevation-md))}.public-layout__main{max-width:var(--layout-max-public);padding:2.25rem var(--space-6) 3.75rem;margin:0 auto}.public-layout__main--wide{max-width:none;padding:0}@media (width<=640px){.public-nav{padding:.7rem var(--space-4)}.public-layout__main{padding:var(--space-6) var(--space-4) 2.75rem}}.public-deck{max-width:var(--layout-max-deck,42rem);margin:0 auto}.public-deck__status{text-align:center;padding:var(--space-10) 0}.public-deck__head{margin-bottom:var(--space-5)}.public-deck__head .sg-page-header{border-bottom:0;flex:1;min-width:0;margin-bottom:0;padding-bottom:0}.public-deck__crumb{font-size:var(--text-sm);color:var(--color-text-tertiary);margin-bottom:var(--space-3);flex-wrap:wrap;align-items:center;gap:.35rem;display:flex}.public-deck__crumb a{color:var(--color-text-secondary);font-weight:500;text-decoration:none}.public-deck__crumb a:hover{color:var(--color-text-primary)}.public-deck__title-row{justify-content:space-between;align-items:flex-start;gap:var(--space-4);display:flex}.public-deck__desc{margin-top:var(--space-3);font-size:var(--text-body-lg);line-height:var(--leading-relaxed);color:var(--color-text-secondary);max-width:52ch}.public-deck__library-bar{align-items:center;gap:var(--space-3);margin-top:var(--space-5);padding-top:var(--space-5);border-top:1px solid var(--color-border-muted,var(--color-border));flex-wrap:wrap;display:flex}.public-deck__library-bar .sg-btn{min-height:2.65rem;font-size:var(--text-base);padding-inline:1.15rem}.public-deck__adopt-error{width:100%;font-size:var(--text-sm);color:var(--color-error)}.public-deck__mode{margin-bottom:var(--space-6)}.public-deck__study{gap:var(--space-4);flex-direction:column;display:flex}.public-deck__progress{font-size:var(--text-sm);color:var(--color-text-secondary);font-variant-numeric:tabular-nums;justify-content:space-between;align-items:center;font-weight:500;display:flex}.public-deck__card{margin-bottom:var(--space-2)}.public-deck__nudge p{font-size:var(--text-body-lg);color:var(--color-text-secondary);line-height:var(--leading-relaxed);margin-bottom:var(--space-4)}.public-deck__nudge-actions{gap:var(--space-3);flex-wrap:wrap;display:flex}.public-deck__done{padding:var(--space-6) 0 var(--space-10)}.public-deck__done .sg-page-header{text-align:center;border-bottom:0;margin-bottom:0;padding-bottom:0}.public-deck__done .sg-page-header h1,.public-deck__done .sg-page-header__sub{max-width:none;margin-inline:auto}.public-deck__done .sg-page-header__actions{justify-content:center}@media (width<=560px){.public-deck__title-row{flex-direction:column;align-items:stretch}.public-deck__nudge-actions .sg-btn{width:auto}}@media (width<=640px){.public-deck__done .sg-page-header__actions .sg-btn{width:auto}}.review{max-width:40rem;margin:0 auto}.review__meta{justify-content:space-between;align-items:flex-start;gap:var(--space-4);margin-bottom:var(--space-5);display:flex}.review__path{color:var(--color-text-secondary,var(--muted));font-size:var(--text-sm);margin-bottom:var(--space-1);font-weight:500}.review__mode{color:var(--color-primary,var(--accent));font-size:var(--text-sm);font-weight:500}.review__count{color:var(--color-text-secondary,var(--muted));font-size:var(--text-sm);font-variant-numeric:tabular-nums}.review__meta-right{align-items:flex-end;gap:var(--space-2);flex-direction:column;display:flex}.review__card{margin-bottom:var(--space-5)}.review__hint{margin-top:var(--space-4);color:var(--color-text-secondary,var(--muted));font-size:var(--text-sm);text-align:center}.review__keys{margin-top:var(--space-2);color:var(--color-text-tertiary,var(--muted));font-size:var(--text-xs);text-align:center}.review-complete{max-width:36rem}.review-complete .sg-page-header{border-bottom:0;margin-bottom:0;padding-bottom:0}@media (width<=700px){.review__keys{display:none}}@media (width<=520px){.review__meta{flex-direction:column;align-items:stretch}.review__meta-right{flex-direction:row;justify-content:space-between;align-items:center}}.landing-decks{background:var(--color-background-wash)}.landing-decks__head{justify-content:space-between;align-items:flex-end;gap:var(--space-5);margin-bottom:var(--space-5);flex-wrap:wrap;display:flex}.landing-decks__head .sg-section-header{margin-bottom:0}.landing-decks__meta{font-size:var(--text-body-public);color:var(--color-text-tertiary);white-space:nowrap;font-weight:500}.landing-decks__filters{gap:var(--space-2);margin-bottom:var(--space-6);flex-wrap:wrap;display:flex}.landing-decks__pill{border:1px solid var(--color-border-muted);background:var(--color-surface);color:var(--color-text-secondary);font-family:var(--font-body);font-size:var(--text-sm);border-radius:var(--radius-pill);cursor:pointer;transition:border-color var(--duration-normal) ease, color var(--duration-normal) ease, background var(--duration-normal) ease;padding:.45rem .85rem;font-weight:500}.landing-decks__pill:hover{border-color:var(--color-border-strong);color:var(--color-text-primary)}.landing-decks__pill.is-active{border-color:var(--color-primary);color:var(--color-primary);background:var(--color-primary-soft)}.landing-decks__grid{gap:var(--space-5);grid-template-columns:repeat(auto-fill,minmax(300px,1fr));margin:0;padding:0;list-style:none;display:grid}.landing-decks__error{color:var(--color-error);text-align:center;padding:var(--space-8) 0}.landing-decks__empty{text-align:center;color:var(--color-text-secondary);padding:var(--space-10);border:1px dashed var(--color-border-muted);border-radius:var(--radius-xl);background:var(--color-surface)}.landing-decks__skeleton{min-height:11rem;padding:var(--space-6);border-radius:var(--radius-xl);background:var(--color-surface);border:1px solid var(--color-border-muted);gap:var(--space-3);display:grid}.landing-decks__shimmer{border-radius:var(--radius-xs);background:var(--gradient-skeleton);background-size:200% 100%;animation:1.4s ease-in-out infinite landing-shimmer;display:block}.landing-decks__shimmer--tag{width:4rem;height:.9rem}.landing-decks__shimmer--title{width:70%;height:1.2rem}.landing-decks__shimmer--desc{width:100%;height:2.5rem}@keyframes landing-shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}@media (width<=768px){.landing-decks__head{flex-direction:column;align-items:flex-start}}.landing-cta{background:var(--gradient-hero-glow-a), var(--color-background-wash);border-top:1px solid var(--color-border-muted)}.landing-cta__inner{text-align:center;max-width:40rem}.landing-cta__inner h2{font-size:var(--text-display-sm);margin-bottom:var(--space-4);color:var(--color-text-display)}.landing-cta__inner p{font-size:var(--text-body-xl);line-height:var(--leading-relaxed);color:var(--color-text-secondary);margin-bottom:var(--space-6)}.landing-cta__inner .sg-btn{min-width:12rem}@media (width<=640px){.landing-cta__inner .sg-btn{width:100%;min-width:0}}.hero-visual{min-height:380px;position:relative}.hero-visual__dashboard{gap:var(--space-4);padding:var(--space-5);border-radius:var(--radius-xl);background:var(--color-surface);border:1px solid var(--color-border-muted);box-shadow:var(--elevation-md);opacity:.92;display:grid;position:absolute;inset:0;transform:scale(.96)translateY(8px)}.hero-visual__dashboard .sg-stat-row{grid-template-columns:1fr 1fr}.hero-visual__dashboard .sg-streak__grid{grid-template-columns:repeat(7,1fr)}.hero-visual__card{z-index:1;max-width:88%;margin:2.5rem auto 0;position:relative;transform:translate(6%)}.hero-visual__card .sg-flashcard--compact,.hero-visual__card .sg-flashcard__inner{min-height:240px}@media (width<=768px){.hero-visual{max-width:420px;min-height:340px;margin-inline:auto}.hero-visual__card{max-width:92%;margin-top:2rem;transform:none}}@media (prefers-reduced-motion:reduce){.hero-visual__dashboard{transform:none}}.landing-hero{padding-top:var(--space-12);background:var(--gradient-hero-glow-a), var(--gradient-hero-glow-c), var(--gradient-hero);border-bottom:1px solid var(--color-border-muted)}.landing-hero__inner{gap:var(--space-10);grid-template-columns:1fr 1fr;align-items:center;display:grid}.landing-hero__copy h1{font-size:var(--text-display-md);max-width:16ch;margin-bottom:var(--space-5)}.landing-hero__lead{font-size:var(--text-body-xl);line-height:var(--leading-relaxed);color:var(--color-text-secondary);max-width:38rem;margin-bottom:var(--space-6)}.landing-hero__actions{gap:var(--space-3);flex-wrap:wrap;display:flex}@media (width<=900px){.landing-hero__inner{gap:var(--space-8);grid-template-columns:1fr}.landing-hero__copy h1{max-width:none}.landing-hero__copy{text-align:center}.landing-hero__lead{margin-inline:auto}.landing-hero__actions{justify-content:center}}@media (width<=640px){.landing-hero__actions{flex-direction:column;align-items:stretch}}.landing-steps{background:var(--color-background)}.landing-steps__grid{gap:var(--space-5);grid-template-columns:repeat(3,1fr);margin:0;padding:0;list-style:none;display:grid}.landing-step{padding:var(--space-6);border-radius:var(--radius-xl);background:var(--color-surface);border:1px solid var(--color-border-muted);box-shadow:var(--elevation-card)}.landing-step__num{font-family:var(--font-heading);font-size:var(--text-sm);color:var(--color-text-tertiary);margin-bottom:var(--space-4);font-weight:600;display:block}.landing-step h3{font-size:var(--text-xl);margin-bottom:var(--space-3);color:var(--color-text-display)}.landing-step ul{gap:.35rem;margin:0;padding:0;list-style:none;display:grid}.landing-step ul li{font-size:var(--text-body-public);color:var(--color-text-secondary);line-height:var(--leading-relaxed)}.landing-step ul li:before{content:"·";color:var(--color-primary);margin-right:.4rem}@media (width<=768px){.landing-steps__grid{grid-template-columns:1fr}}.landing-progress{background:var(--color-background)}.landing-progress__inner{gap:var(--space-10);grid-template-columns:.9fr 1.1fr;align-items:start;display:grid}.landing-progress__copy .sg-section-header{margin-bottom:0}.landing-progress__panel{gap:var(--space-5);display:grid}.landing-progress__charts{gap:var(--space-4);grid-template-columns:1fr 1fr;display:grid}@media (width<=900px){.landing-progress__inner,.landing-progress__charts{grid-template-columns:1fr}}@media (width<=640px){.landing-progress__panel .sg-stat-row{grid-template-columns:repeat(2,1fr)}}.landing__footer{border-top:1px solid var(--color-border-muted);background:var(--color-surface);padding:var(--space-6)}.landing__footer-inner{max-width:var(--layout-max-public);padding-inline:var(--space-6);justify-content:space-between;align-items:center;gap:var(--space-4);flex-wrap:wrap;margin:0 auto;display:flex}.landing__footer p{font-size:var(--text-md);color:var(--color-text-tertiary)}.landing__footer a{font-size:var(--text-md);color:var(--color-primary);font-weight:600;text-decoration:none}.landing__footer a:hover{color:var(--color-primary-hover)}@media (width<=640px){.landing__footer-inner{padding-inline:var(--space-5);text-align:center;flex-direction:column}}.ds{max-width:var(--layout-max-public);padding:var(--space-12) var(--space-6) var(--space-20);margin:0 auto}.ds--app{max-width:none;margin-top:var(--space-16);border-top:1px solid var(--color-border-muted,var(--border));padding:0}.ds__app-inner{max-width:1200px;padding:var(--space-10) var(--space-6) var(--space-16);margin:0 auto}.ds__hero{text-align:center;padding:var(--space-10) 0 var(--space-16);margin-bottom:var(--space-12);border-bottom:1px solid var(--color-border-muted)}.ds__hero-eyebrow{font-size:var(--text-sm);color:var(--color-text-tertiary);margin-bottom:var(--space-5);font-weight:500}.ds__hero-title{font-family:var(--font-heading);font-size:var(--text-display-md);letter-spacing:var(--tracking-tight);font-weight:600;line-height:var(--leading-tight);color:var(--color-text-display);max-width:22ch;margin:0 auto var(--space-5)}.ds__hero-lead{font-size:var(--text-body-xl);line-height:var(--leading-relaxed);color:var(--color-text-secondary);max-width:36rem;margin:0 auto var(--space-8);font-weight:400}.ds__hero-actions{justify-content:center;gap:var(--space-3);flex-wrap:wrap;display:flex}.ds__block{margin-bottom:var(--space-16)}.ds__showcase{gap:var(--space-8);grid-template-columns:1.1fr .9fr;align-items:start;display:grid}.ds__flash-col .sg-flashcard--default,.ds__flash-col .sg-flashcard__inner{min-height:320px}.ds__progress-col{gap:var(--space-4);display:grid}.ds__grid{gap:var(--space-5);display:grid}.ds__grid--badges{justify-content:start;gap:var(--space-3);grid-template-columns:repeat(auto-fit,minmax(6.5rem,auto))}.ds__grid--charts{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}.ds__grid--decks{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}@media (width<=900px){.ds__showcase{grid-template-columns:1fr}}@media (width<=640px){.ds{padding-inline:var(--space-5)}.ds__hero{padding-top:var(--space-8)}.ds__hero-actions{flex-direction:column;align-items:stretch}}