:root{--color-text-primary: #18324a;--color-text-secondary: #3c5468;--color-text-muted: #4a6275;--color-text-faint: #5b7386;--color-surface-paper: #fffdf7;--color-surface-card: #f3f7fa;--color-surface-white: #ffffff;--color-border: #c9d6df;--color-border-soft: #e2eaf0;--color-action-primary: #2e6fbe;--color-action-primary-hover: #1f4f8b;--color-action-primary-active: #194272;--color-action-selected-bg: #e4edf9;--color-feedback-success: #267e78;--color-feedback-success-bg: #dcefec;--color-feedback-success-border: #9ccec9;--color-feedback-success-text: #1e6660;--color-feedback-warning: #f2c14e;--color-feedback-warning-bg: #fff6e0;--color-feedback-warning-border: #e8c97a;--color-feedback-warning-text: #8a5a12;--color-feedback-error: #c95650;--color-feedback-error-bg: #f9e9e8;--color-feedback-error-border: #e3b3b0;--color-feedback-error-text: #a8443f;--color-line-english: #6e63b6;--color-line-english-bg: #eae7f7;--color-line-english-text: #514894;--color-mode-olympiad: #18324a;--color-disabled-bg: #e2eaf0;--color-disabled-fg: #7c93a5;--space-1: 8px;--space-2: 16px;--space-3: 24px;--space-4: 32px;--space-5: 48px;--radius-card: 20px;--radius-control: 12px;--radius-chip: 999px;--font-size-display: 32px;--font-size-question: 22px;--font-size-task: 19px;--font-size-body: 16px;--font-size-caption: 13.5px;--line-height-task: 1.58;--duration-state: .15s;--duration-screen: .25s;--ease: cubic-bezier(.2, .7, .3, 1);--font-main: "Golos Text", system-ui, -apple-system, "Segoe UI", sans-serif;--font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, monospace;--shadow-float: 0 8px 24px -16px rgba(24, 50, 74, .2)}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100%}body{background:var(--color-surface-paper);color:var(--color-text-primary);font-family:var(--font-main);font-size:var(--font-size-body);-webkit-font-smoothing:antialiased;font-variant-numeric:tabular-nums}a{color:var(--color-action-primary);text-decoration:none}a:hover{color:var(--color-action-primary-hover);text-decoration:underline}button,a,input,select,textarea{touch-action:manipulation}button{font-family:inherit;font-size:inherit;cursor:pointer}:focus-visible{outline:none;box-shadow:0 0 0 3px var(--color-surface-paper),0 0 0 6px var(--color-action-primary);border-radius:var(--radius-control)}@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 20px;border-radius:13px;border:none;font-size:16px;font-weight:600;background:var(--color-action-primary);color:var(--color-surface-paper);transition:background var(--duration-state) var(--ease)}.btn:hover{background:var(--color-action-primary-hover)}.btn:active{background:var(--color-action-primary-active)}.btn:disabled{background:var(--color-disabled-bg);color:var(--color-disabled-fg);cursor:default}.btn--big{min-height:52px;padding:0 26px;font-size:17px}.btn--secondary{background:var(--color-surface-white);color:var(--color-text-secondary);border:1px solid var(--color-border);font-weight:400}.btn--secondary:hover{background:var(--color-surface-card)}.btn--secondary:active{background:var(--color-border-soft)}.btn--ghost{background:transparent;color:var(--color-action-primary);font-weight:400}.btn--ghost:hover,.btn--ghost:active{background:var(--color-surface-card)}.btn--ink{background:var(--color-mode-olympiad)}.btn--ink:hover{background:#22405c}.btn--danger{background:transparent;border:1.5px solid var(--color-feedback-error);color:var(--color-feedback-error-text);font-weight:400}.btn--danger:hover{background:var(--color-feedback-error-bg)}.btn--sun{background:var(--color-feedback-warning);color:var(--color-text-primary)}.btn--sun:hover{background:#e6b53f}.card{background:var(--color-surface-white);border:1px solid var(--color-border);border-radius:var(--radius-card);padding:22px}.card--flat{background:var(--color-surface-card)}.mono{font-family:var(--font-mono)}.eyebrow{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--color-text-faint)}.caption{font-size:var(--font-size-caption);color:var(--color-text-muted)}.task-text{font-size:var(--font-size-task);line-height:var(--line-height-task);color:#20394f;max-width:64ch;text-wrap:pretty;white-space:pre-line}.question-text{font-size:var(--font-size-question);font-weight:600;line-height:1.35;color:var(--color-text-primary)}.field{display:flex;flex-direction:column;gap:6px}.field label{font-size:var(--font-size-caption);color:var(--color-text-muted)}.field input,.field textarea,.field select{border:1px solid var(--color-border);border-radius:var(--radius-control);padding:14px;font-size:17px;font-family:inherit;color:var(--color-text-primary);background:var(--color-surface-white)}.field input:focus,.field textarea:focus,.field select:focus{outline:none;border:1.5px solid var(--color-action-primary);box-shadow:0 0 0 3px #2e6fbe33}.feedback{display:flex;gap:14px;border-radius:18px;padding:18px;border:1px solid var(--color-border);min-height:88px}.feedback--success{background:var(--color-feedback-success-bg);border-color:var(--color-feedback-success-border)}.feedback--error{background:var(--color-feedback-error-bg);border-color:var(--color-feedback-error-border)}.feedback--warning{background:var(--color-feedback-warning-bg);border-color:var(--color-feedback-warning-border)}.feedback--info{background:var(--color-surface-card)}.feedback__icon{width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0;color:#fff}.option{display:flex;align-items:center;gap:13px;width:100%;min-height:52px;text-align:left;border:1px solid var(--color-border);background:var(--color-surface-white);border-radius:16px;padding:14px 16px;font-size:17px;color:#20394f;transition:background var(--duration-state) var(--ease),border-color var(--duration-state) var(--ease)}.option:hover{background:var(--color-surface-card)}.option--selected{border:1.5px solid var(--color-action-primary);background:var(--color-action-selected-bg)}.option--correct{border:1.5px solid var(--color-feedback-success);background:var(--color-feedback-success-bg)}.option--incorrect{border:1.5px solid var(--color-feedback-error);background:var(--color-feedback-error-bg)}.option__badge{width:30px;height:30px;border-radius:9px;background:var(--color-surface-card);color:var(--color-text-muted);display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);font-size:13px;flex-shrink:0}.option--selected .option__badge{background:var(--color-action-primary);color:#fff}.option--correct .option__badge{background:var(--color-feedback-success);color:#fff}.option--incorrect .option__badge{background:var(--color-feedback-error);color:#fff}.chip{display:inline-flex;align-items:center;padding:4px 9px;border-radius:var(--radius-chip);font-size:12.5px;font-weight:600}.skill-state{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600}table.data{border-collapse:collapse;width:100%}table.data th{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--color-text-muted);text-align:left;padding:11px 12px;background:var(--color-surface-card)}table.data td{padding:12px;border-top:1px solid var(--color-border-soft);font-size:14.5px;color:#20394f;vertical-align:top}.table-scroll{overflow-x:auto}@media(max-width:640px){.card{padding:16px}}