*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#1a1a1a;--surface:#252525;--surface-hover:#2e2e2e;--text-primary:#f0ece4;--text-secondary:#9e9a93;--accent-easy:#4caf78;--accent-medium:#e8a94a;--accent-hard:#e05c5c;--accent-bonus:#9b74d4;--radius:12px;--gap:1.5rem}body{background:var(--bg);color:var(--text-primary);min-height:100dvh;padding:2rem 1rem;font-family:system-ui,-apple-system,sans-serif}.home{max-width:1100px;margin:0 auto}.home-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem;margin-bottom:2.5rem;display:flex}.home-header h1{letter-spacing:-.02em;font-size:clamp(1.4rem,3vw,2rem);font-weight:700}.streak-counter{background:var(--surface);border-radius:999px;align-items:center;gap:.5rem;padding:.5rem 1rem;display:flex}.streak-flame{font-size:1.25rem}.streak-count{font-size:1.4rem;font-weight:700}.streak-label{color:var(--text-secondary);font-size:.875rem}.cards-grid{gap:var(--gap);grid-template-columns:repeat(auto-fit,minmax(220px,1fr));display:grid}.section-card{background:var(--surface);border-radius:var(--radius);border:2px solid #0000;flex-direction:column;gap:1rem;padding:1.5rem;transition:border-color .2s;display:flex}.section-card--easy{border-color:var(--accent-easy)}.section-card--medium{border-color:var(--accent-medium)}.section-card--hard{border-color:var(--accent-hard)}.section-card--bonus{border-color:var(--accent-bonus)}.card-title{font-size:1.125rem;font-weight:700}.card-description{color:var(--text-secondary);font-size:.875rem;line-height:1.5}.card-topic{font-size:1.25rem;font-weight:600;line-height:1.3}.completed-image{object-fit:cover;border-radius:8px;width:100%;max-height:200px}.save-reminder{color:var(--text-secondary);font-size:.8rem;line-height:1.4}.cooldown-timer{color:var(--text-secondary);font-size:.875rem}.cooldown-time{font-variant-numeric:tabular-nums;color:var(--text-primary);font-weight:600}.btn{cursor:pointer;border:none;border-radius:8px;align-self:flex-start;padding:.6rem 1.25rem;font-size:.9rem;font-weight:600;transition:opacity .15s}.btn:disabled{opacity:.4;cursor:not-allowed}.btn-get-topic{background:var(--text-primary);color:var(--bg)}.btn-complete{background:var(--accent-easy);color:#fff}.btn-submit{background:var(--accent-medium);color:#fff}.upload-area{flex-direction:column;gap:.75rem;display:flex}.upload-label{color:var(--text-secondary);font-size:.875rem}.upload-input{color:var(--text-primary);font-size:.875rem}.upload-preview{object-fit:cover;border-radius:8px;width:100%;max-height:160px}.upload-error{color:var(--accent-hard);font-size:.8rem}.loading{min-height:50dvh;color:var(--text-secondary);justify-content:center;align-items:center;display:flex}