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:root{--color-primary:#fa6969;--color-primary-hover:#e85555;--color-primary-light:#fff0ee;--color-primary-dark:#c43e3e;--color-accent:#c17f4a;--color-accent-hover:#a86b38;--color-background:#faf8f5;--color-surface:#fff;--color-surface-2:#f5f1ec;--color-text-main:#2c1810;--color-text-muted:#7a6b63;--color-text-light:#b5a89e;--color-border:#ede8e2;--color-border-strong:#e0d8d0;--color-success:#2d9e6b;--color-success-light:#dcfce7;--color-error:#e8442a;--color-error-light:#fee8e4;--color-warning:#d97706;--color-online:#3b7dd8;--color-online-light:#dbeafe;--color-offline:#7c5cbf;--color-offline-light:#ede9fe;--color-both:#2d9e6b;--color-both-light:#dcfce7;--spacing-1:.25rem;--spacing-2:.5rem;--spacing-3:.75rem;--spacing-4:1rem;--spacing-5:1.25rem;--spacing-6:1.5rem;--spacing-8:2rem;--spacing-10:2.5rem;--spacing-12:3rem;--spacing-16:4rem;--spacing-20:5rem;--spacing-24:6rem;--font-sans:"Plus Jakarta Sans", system-ui, -apple-system, 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var(--spacing-8);font-size:1.0625rem}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-xl);padding:var(--spacing-6);box-shadow:var(--shadow-sm);transition:transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base)}.card:hover{box-shadow:var(--shadow-md);border-color:var(--color-border-strong);transform:translateY(-2px)}.card-flat{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-xl);padding:var(--spacing-6)}.input-field{width:100%;padding:var(--spacing-3) var(--spacing-4);border:1.5px solid var(--color-border-strong);border-radius:var(--radius-lg);background:var(--color-surface);color:var(--color-text-main);font-family:var(--font-sans);transition:border-color var(--transition-base), box-shadow 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10px;font-size:.75rem;font-weight:600;line-height:1.5;display:inline-flex}.badge-online{background:var(--color-online-light);color:var(--color-online)}.badge-offline{background:var(--color-offline-light);color:var(--color-offline)}.badge-both{background:var(--color-both-light);color:var(--color-both)}.badge-free{background:var(--color-primary-light);color:var(--color-primary-dark)}.badge-chapter{color:#4f46e5;background:#f0f4ff}.badge-revision{color:#db2777;background:#fff0f5}.badge-quiz{color:#059669;background:#f0fff4}.badge-pending{color:#b45309;background:#fff8dc}.badge-approved{background:var(--color-success-light);color:var(--color-success)}.badge-rejected{background:var(--color-error-light);color:var(--color-error)}.avatar{border-radius:var(--radius-full);letter-spacing:-.02em;flex-shrink:0;justify-content:center;align-items:center;font-weight:700;display:inline-flex;overflow:hidden}.avatar-sm{width:32px;height:32px;font-size:.75rem}.avatar-md{width:44px;height:44px;font-size:.9375rem}.avatar-lg{width:64px;height:64px;font-size:1.375rem}.avatar-xl{width:88px;height:88px;font-size:1.875rem}.avatar-2xl{width:120px;height:120px;font-size:2.5rem}.stars{color:var(--color-primary);gap:2px;font-size:1rem;display:inline-flex}.stars-sm{font-size:.875rem}.stat-card{background:var(--color-surface);border:1px 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