:root { color-scheme: dark; }
.theme-toggle { min-width:112px; white-space:nowrap; }
.theme-toggle:focus-visible { outline:2px solid var(--blue); outline-offset:3px; }
:root[data-theme="light"] {
 color-scheme:light;
 --bg:#ffffff;--bg2:#f5f7fb;--panel:#ffffff;--panel2:#edf2f8;--line:#cbd5e1;
 --text:#17243a;--muted:#52627a;--green:#15803d;--red:#be123c;--blue:#1d4ed8;
}
[data-theme="light"] body { background:#f7f9fc; }
[data-theme="light"] .card:not(.folder):not(.lesson):not(.level) { background:#fff;box-shadow:0 12px 32px rgba(30,50,80,.07); }
[data-theme="light"] .card.hero { background:linear-gradient(135deg,#fff,#eef4ff); }
[data-theme="light"] .pill,
[data-theme="light"] .select,
[data-theme="light"] .search,
[data-theme="light"] .login input,
[data-theme="light"] .answerbox input,
[data-theme="light"] .form-card input,
[data-theme="light"] .form-card textarea,
[data-theme="light"] #dictionaryQuery { background:#fff;border-color:var(--line); }
[data-theme="light"] #dictionaryView .card { border-color:var(--line); }
[data-theme="light"] .eyebrow,
[data-theme="light"] .big { color:#926500; }
[data-theme="light"] .answer-details,
[data-theme="light"] .answer-details b { color:var(--text); }
[data-theme="light"] .answer-details .example { color:var(--muted); }
[data-theme="light"] .bar { background:#dce5ef; }
[data-theme="light"] .toast { background:#fff;box-shadow:0 8px 30px rgba(30,50,80,.15); }
[data-theme="light"] .danger { background:#ffe4e6;color:#9f1239; }
[data-theme="light"] .remember-btn { background:#dcfce7;color:#166534; }
[data-theme="light"] .review-btn { background:#ffedd5;color:#9a3412; }
[data-theme="light"] .level { color:#fff; }
[data-theme="light"] .level .muted { color:#e2e8f0; }
[data-theme="light"] .folder:focus-visible,
[data-theme="light"] .lesson:focus-visible { outline:2px solid #1d4ed8;outline-offset:3px; }
[data-theme="light"] input::placeholder,
[data-theme="light"] textarea::placeholder { color:#64748b;opacity:1; }