:root,:root[data-theme=light]{color-scheme:light;--primary-gradient: linear-gradient(135deg, #4f46e5, #2563eb);--surface-gradient: linear-gradient(180deg, rgba(255, 255, 255, .96), rgba(248, 250, 252, .96));--bg-gradient: radial-gradient(circle at 18% -10%, rgba(79, 70, 229, .1), transparent 34%), radial-gradient(circle at 88% 4%, rgba(124, 58, 237, .055), transparent 28%), #f7f9fc;--text-main: #0f172a;--text-muted: #64748b;--text-soft: #94a3b8;--border-color: #e2e8f0;--border-strong: #cbd5e1;--bg-card: #ffffff;--bg-elevated: rgba(255, 255, 255, .86);--bg-soft: #f8fafc;--bg-social-hover: #f8fafc;--divider-text-color: #94a3b8;--primary: #4f46e5;--primary-dark: #3730a3;--primary-soft: #eef2ff;--primary-border: #c7d2fe;--on-primary: #ffffff;--teal: #14b8a6;--violet: #7c3aed;--violet-soft: #f5f3ff;--success: #10b981;--success-soft: #ecfdf5;--success-border: #a7f3d0;--success-text: #047857;--warning: #f59e0b;--warning-soft: #fffbeb;--warning-border: #fde68a;--warning-text: #92400e;--danger: #dc2626;--danger-soft: #fef2f2;--danger-border: #fecaca;--danger-text: #991b1b;--radius-sm: .55rem;--radius-md: .75rem;--radius-lg: 1rem;--radius-xl: 1.35rem;--soft-shadow: 0 24px 70px rgba(15, 23, 42, .09);--card-shadow: 0 14px 42px rgba(15, 23, 42, .065);--focus-ring: 0 0 0 4px rgba(79, 70, 229, .14)}:root[data-theme=dark]{color-scheme:dark;--primary-gradient: linear-gradient(135deg, #818cf8, #38bdf8);--surface-gradient: linear-gradient(180deg, rgba(15, 23, 42, .97), rgba(15, 23, 42, .91));--bg-gradient: radial-gradient(circle at 18% -10%, rgba(99, 102, 241, .18), transparent 34%), radial-gradient(circle at 88% 4%, rgba(45, 212, 191, .1), transparent 28%), #0b1120;--text-main: #e5e7eb;--text-muted: #a7b2c3;--text-soft: #7c8798;--border-color: rgba(148, 163, 184, .22);--border-strong: rgba(148, 163, 184, .38);--bg-card: #111827;--bg-elevated: rgba(15, 23, 42, .84);--bg-soft: rgba(30, 41, 59, .72);--bg-social-hover: rgba(30, 41, 59, .92);--divider-text-color: #7c8798;--primary: #818cf8;--primary-dark: #c4b5fd;--primary-soft: rgba(129, 140, 248, .15);--primary-border: rgba(129, 140, 248, .36);--on-primary: #ffffff;--teal: #2dd4bf;--violet: #a78bfa;--violet-soft: rgba(167, 139, 250, .14);--success: #34d399;--success-soft: rgba(6, 95, 70, .36);--success-border: rgba(52, 211, 153, .36);--success-text: #a7f3d0;--warning: #fbbf24;--warning-soft: rgba(120, 53, 15, .34);--warning-border: rgba(251, 191, 36, .34);--warning-text: #fde68a;--danger: #f87171;--danger-soft: rgba(127, 29, 29, .34);--danger-border: rgba(248, 113, 113, .34);--danger-text: #fecaca;--card-shadow: 0 18px 46px rgba(0, 0, 0, .28);--soft-shadow: 0 28px 80px rgba(0, 0, 0, .34);--focus-ring: 0 0 0 4px rgba(129, 140, 248, .18)}:root[data-theme=amber-night]{color-scheme:dark;--primary-gradient: linear-gradient(135deg, #d97706, #7c3aed);--surface-gradient: linear-gradient(180deg, rgba(31, 24, 20, .97), rgba(22, 18, 17, .92));--bg-gradient: radial-gradient(circle at 16% -8%, rgba(217, 119, 6, .18), transparent 34%), radial-gradient(circle at 88% 2%, rgba(124, 58, 237, .13), transparent 28%), #14100f;--text-main: #f3ede5;--text-muted: #c8b9a8;--text-soft: #9a8a7a;--border-color: rgba(202, 166, 125, .24);--border-strong: rgba(226, 185, 133, .38);--bg-card: #1d1715;--bg-elevated: rgba(29, 23, 21, .86);--bg-soft: rgba(52, 40, 33, .68);--bg-social-hover: rgba(64, 48, 37, .92);--divider-text-color: #a38f7b;--primary: #f59e0b;--primary-dark: #fbbf24;--primary-soft: rgba(245, 158, 11, .15);--primary-border: rgba(245, 158, 11, .34);--on-primary: #ffffff;--teal: #2dd4bf;--violet: #a78bfa;--violet-soft: rgba(124, 58, 237, .14);--success: #34d399;--success-soft: rgba(6, 78, 59, .34);--success-border: rgba(52, 211, 153, .34);--success-text: #bbf7d0;--warning: #f59e0b;--warning-soft: rgba(120, 53, 15, .36);--warning-border: rgba(245, 158, 11, .34);--warning-text: #fde68a;--danger: #fb7185;--danger-soft: rgba(127, 29, 29, .34);--danger-border: rgba(251, 113, 133, .34);--danger-text: #fecdd3;--card-shadow: 0 18px 48px rgba(4, 2, 1, .32);--soft-shadow: 0 28px 80px rgba(4, 2, 1, .38);--focus-ring: 0 0 0 4px rgba(245, 158, 11, .17)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,Manrope,Poppins,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg-gradient);color:var(--text-main);min-height:100vh;letter-spacing:0;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}a{color:inherit}button,input,textarea,select{font:inherit;letter-spacing:0}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:none;box-shadow:var(--focus-ring)}::selection{color:#fff;background:var(--primary)}:root:is([data-theme=dark],[data-theme=amber-night]) body{background:var(--bg-gradient)}:root:is([data-theme=dark],[data-theme=amber-night]) :where(input,textarea,select){color:var(--text-main);background:var(--bg-soft);border-color:var(--border-color)}:root:is([data-theme=dark],[data-theme=amber-night]) :where(.study-hero,.subject-panel,.content-panel,.locked-panel,.hero-metrics div,.level-card,.lesson-grid>div,.example-card,.option-list button,.feedback,.score-panel,.empty-panel,.lesson-panel,.loading-panel,.action-panel,.subject-button,.flashcards-topbar,.library-hero,.flow-panel,.stat-card,.set-card,.editor-panel,.summary-panel,.login-required,.quick-create,.editor-card,.learn-card,.result-card,.learn-option,.mistake-list article,.trust-row div,.hero-preview,.preview-sidebar,.feature-preview-list article,.wide-card,.mode-card,.contact-card,.privacy-card,.policy-card,.history-card,.result-panel,.question-card,.vocational-card,.test-card){color:var(--text-main);background:var(--bg-card);border-color:var(--border-color);box-shadow:var(--card-shadow)}:root:is([data-theme=dark],[data-theme=amber-night]) :where(.action-panel,.level-card,.feedback,.lesson-panel,.loading-panel,.hero-metrics div,.stat-card,.flow-steps article,.summary-stats article,.import-panel,.learn-feedback,.mistake-list article,.preview-content,.side-pill,.trust-row div,.secondary-action,.inline-action,.mode-card.teal,.mode-card.warm,.option-list button,.subject-button,.btn-ghost,.square-action,.study-action.subtle,.mini-tool,.set-actions,.progress-track){background:var(--bg-soft);border-color:var(--border-color)}:root:is([data-theme=dark],[data-theme=amber-night]) :where(.eyebrow,.hero-badge,.section-kicker,.level-top span,.subject-button.active,.subject-button:hover,.nav-links a.active,.nav-links a:hover,.side-pill.active,.set-subject,.set-actions a:hover,.option-list button:hover:not(:disabled),.option-list button.selected){color:var(--primary);background:var(--primary-soft);border-color:var(--primary-border)}:root:is([data-theme=dark],[data-theme=amber-night]) :where(.study-hero p,.subject-detail p,.level-card p,.empty-panel p,.locked-panel p,.feedback p,.score-panel p,.library-copy p,.flow-steps p,.set-description,.flashcards-page label span,.stat-card span,.summary-stats span,.learn-feedback p,.result-card p,.hero-subtitle,.contact-page p,.privacy-page p,.results-page p,.history-page p){color:var(--text-muted)}:root:is([data-theme=dark],[data-theme=amber-night]) :where(.option-list button.correct,.learn-option.is-correct,.learn-feedback .correct){color:var(--success-text);background:var(--success-soft);border-color:var(--success-border)}:root:is([data-theme=dark],[data-theme=amber-night]) :where(.option-list button.wrong,.learn-option.is-wrong,.learn-feedback .wrong,.alert,.flashcards-alert){color:var(--danger-text);background:var(--danger-soft);border-color:var(--danger-border)}:root:is([data-theme=dark],[data-theme=amber-night]) :where(.sync-pill,.btn-warm,.study-action.warm){color:var(--warning-text);background:var(--warning-soft);border-color:var(--warning-border)}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.001ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.001ms!important}}.text-center{text-align:center}.mb-2{margin-bottom:.5rem}.mb-4{margin-bottom:1rem}.mb-8{margin-bottom:2rem}