/* =============================================================
   1. ПЕРЕМЕННЫЕ И СБРОС
   ============================================================= */

:root {
    --bg: #0e0e13;
    --card: rgba(255, 255, 255, 0.04);
    --text: #f2f2f6;
    --muted: #a4a7b3;
    --accent1: #6a5acd;
    --accent2: #8a2be2;
    --success: #30c48d;
    --error: #ff6b6b;
}

* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    background: radial-gradient(1200px 600px at 10% -10%, #2a2755 0%, transparent 60%),
        radial-gradient(1200px 600px at 110% 10%, #3b1c6d 0%, transparent 60%), var(--bg);
    background-repeat: no-repeat;
    color: var(--text);
    font: 16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}


/* =============================================================
   2. LAYOUT
   ============================================================= */

.container {
    max-width: 960px;
    margin: 24px auto;
    padding: 0 16px;
}

.row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin: 8px 0;
}


/* =============================================================
   3. ШАПКА
   ============================================================= */

.header h1 {
    margin: 8px 0 4px;
    letter-spacing: 0.5px;
}

.sub {
    margin: 0 0 18px;
    color: var(--muted);
}

.userbar {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-top: 8px;
}

.userbar .toggle {
    display: inline-flex;
    gap: 6px;
    align-items: center;
    color: var(--muted);
}


/* =============================================================
   4. КАРТОЧКА
   ============================================================= */

.card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
    border: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 18px;
    margin: 16px 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    animation: fadein 0.25s ease;
}

@keyframes fadein {
    from {
        opacity: 0;
        transform: translateY(4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}


/* =============================================================
   5. КНОПКИ
   ============================================================= */

.btn {
    appearance: none;
    background: linear-gradient(135deg, var(--accent1), var(--accent2));
    color: white;
    border: 0;
    padding: 12px 16px;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
    transition: transform 0.06s ease-in-out, opacity 0.2s;
    box-shadow: 0 8px 18px rgba(102, 51, 204, 0.35);
}
.btn:hover {
    transform: translateY(-1px);
}
.btn:active {
    transform: translateY(0);
    opacity: 0.9;
}

.btn.ghost {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--text);
}

.btn.outline {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.22);
    color: var(--text);
}

.btn.small {
    padding: 4px 10px;
    font-size: 13px;
}

.cancel-btn {
    padding: 4px 10px;
    font-size: 14px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text);
    border: 1px solid rgba(255, 255, 255, 0.15);
    cursor: pointer;
    transition: all 0.2s ease;
}
.cancel-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}


/* =============================================================
   6. СЕЛЕКТОР УРОВНЯ И ЛИМИТА
   ============================================================= */

.limit-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 8px;
}

.limit-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.limit-btn {
    padding: 6px 14px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.15s ease;
}
.limit-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}
.limit-btn.active {
    background: linear-gradient(135deg, var(--accent1), var(--accent2));
    color: #fff;
    border-color: transparent;
    box-shadow: 0 0 10px rgba(138, 43, 226, 0.4);
}


/* =============================================================
   7. ФОРМЫ / ПОЛЯ ВВОДА
   ============================================================= */

input[type="text"],
input[type="password"],
select {
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
}

.input-row {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-top: 8px;
}

.search-row {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-bottom: 10px;
}


/* =============================================================
   8. ТЕСТ
   ============================================================= */

.timer-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.timer {
    font-weight: 600;
    color: var(--muted);
    margin: 6px 0 10px;
}

.q {
    padding: 12px;
    border-radius: 12px;
    background: var(--card);
    margin: 12px 0;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.options {
    display: grid;
    grid-template-columns: repeat(3, minmax(120px, 1fr));
    gap: 8px;
    margin-top: 8px;
}

.opt {
    background: rgba(255, 255, 255, 0.06);
    padding: 10px 12px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    cursor: pointer;
    text-align: center;
}
.opt.selected {
    outline: 2px solid rgba(255, 255, 255, 0.3);
}

.result {
    padding: 10px 12px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.04);
    margin-top: 12px;
}

.ok  { color: var(--success); }
.bad { color: var(--error); }

.meta {
    color: var(--muted);
    font-size: 13px;
}


/* =============================================================
   9. ПАГИНАЦИЯ
   ============================================================= */

.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 12px;
}

.page-btn {
    padding: 6px 12px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
    cursor: pointer;
    transition: background 0.2s;
}
.page-btn:hover {
    background: rgba(255, 255, 255, 0.12);
}
.page-btn.active {
    background: linear-gradient(135deg, var(--accent1), var(--accent2));
    color: #fff;
    border-color: transparent;
}


/* =============================================================
   10. СТАТИСТИКА — глазик для скрытия ошибок
   ============================================================= */

.error-details {
    position: relative;
    padding-right: 40px;
}

.eye-toggle {
    position: absolute;
    right: 8px;
    top: 2px;
    cursor: pointer;
    font-size: 18px;
    opacity: 0.85;
    user-select: none;
    transition: transform 0.2s ease, filter 0.2s ease, opacity 0.2s ease;
}
.eye-toggle:hover {
    opacity: 1;
    transform: scale(1.08);
}
.eye-toggle.active {
    transform: scale(1.16);
    filter: drop-shadow(0 0 6px rgba(228, 224, 235, 0.9));
}

.error-details ul.wrong-list.is-blurred .blur-block {
    display: inline-block;
    filter: blur(6px) !important;
    opacity: 0.35 !important;
    transition: filter 0.25s ease, opacity 0.25s ease;
    will-change: filter, opacity;
}

#stats-area table tbody tr > td:not(:first-child) {
    text-align: center;
}


/* =============================================================
   11. СЛОВАРЬ
   ============================================================= */

.word {
    background: rgba(255, 255, 255, 0.04);
    padding: 10px 12px;
    border-radius: 10px;
    margin: 6px 0;
    border: 1px solid rgba(255, 255, 255, 0.05);
}
.word.needs-review {
    border: 1px solid var(--error);
    background: rgba(255, 107, 107, 0.08);
}
.word .warn {
    color: var(--error);
    font-weight: 600;
}

.dict-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.dict-right-box {
    display: flex;
    align-items: center;
    gap: 12px;
}

.dict-eye-toggle {
    cursor: pointer;
    font-size: 20px;
    opacity: 0.85;
    user-select: none;
    transition: transform 0.2s ease, filter 0.2s ease, opacity 0.2s ease;
}
.dict-eye-toggle:hover {
    opacity: 1;
    transform: scale(1.12);
}
.dict-eye-toggle.active {
    transform: scale(1.18);
    filter: drop-shadow(0 0 6px rgba(150, 80, 255, 0.7));
}

.dict-list-blurred .dict-ru {
    filter: blur(6px) !important;
    opacity: 0.3 !important;
    transition: filter 0.25s ease, opacity 0.25s ease;
}


/* =============================================================
   12. AUTH — чипы с именами
   ============================================================= */

.chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.chip {
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.05);
    cursor: pointer;
    font-size: 14px;
}


/* =============================================================
   13. БЛОК ОБНОВЛЕНИЙ
   ============================================================= */

.update-title {
    margin-top: 0;
    color: #ff0000;
    font-size: 20px;
}

.update-content {
    list-style: decimal;
}


/* =============================================================
   14. ФУТЕР
   ============================================================= */

.footer {
    padding: 16px 0;
    color: var(--muted);
}
.footer a {
    color: var(--muted);
}
.footer a:hover {
    color: var(--text);
}


/* =============================================================
   15. КНОПКИ ПРОКРУТКИ (фиксированные)
   ============================================================= */

.scroll-btn {
    position: fixed;
    right: 20px;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, var(--accent1), var(--accent2));
    color: #fff;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    transition: opacity 0.3s, transform 0.2s;
    z-index: 999;
    display: flex;
    justify-content: center;
    align-items: center;
}

.scroll-btn:hover {
    transform: translateY(-2px);
}

.scroll-btn svg {
    width: 20px;
    height: auto;
}

#scroll-top    { bottom: 70px; }
#scroll-bottom { bottom: 20px; }


/* =============================================================
   16. АНИМАЦИИ И ПЕРЕХОДЫ
   ============================================================= */

.fade-container {
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.35s ease, transform 0.35s ease;
    will-change: opacity, transform;
}
.fade-container.fade-active {
    opacity: 1;
    transform: translateY(0);
}

#dict-area,
#stats-area {
    transition: opacity 0.35s ease;
    will-change: opacity;
}


/* =============================================================
   17. ГРАММАТИКА
   ============================================================= */

#grammar-area h2 {
    margin-bottom: 20px;
}

.grammar-block {
    background: rgba(255, 255, 255, 0.04);
    padding: 18px;
    border-radius: 14px;
    margin-bottom: 28px;
    box-shadow: 0 0 12px rgba(0, 0, 0, 0.25);
}

.grammar-block h3 {
    margin-top: 0;
    color: var(--accent);
}

.g-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
    margin-bottom: 12px;
}
.g-table th,
.g-table td {
    border: 1px solid rgba(255, 255, 255, 0.15);
    padding: 8px 10px;
}

.formula {
    background: rgba(128, 70, 255, 0.16);
    padding: 12px;
    border-radius: 10px;
    margin-top: 10px;
    margin-bottom: 10px;
    line-height: 1.55;
    font-family: monospace;
}

.accent {
    color: #b483ff;
}

.g-examples {
    list-style: disc;
    padding-left: 20px;
    margin-top: 8px;
}
.g-examples li {
    margin-bottom: 6px;
}

.g-ex-en {
    font-weight: 500;
}
.g-ex-ru {
    font-size: 0.9em;
    color: rgba(255, 255, 255, 0.75);
}


/* =============================================================
   18. АДАПТАЦИЯ ДЛЯ МОБИЛЬНЫХ (≤ 600px)
   ============================================================= */

@media (max-width: 600px) {
    .container {
        padding: 0 10px;
        margin: 10px auto;
    }

    /* Шапка */
    .header h1 {
        font-size: 1.5rem;
    }
    .sub {
        font-size: 13px;
        margin-bottom: 10px;
    }

    /* Карточка */
    .card {
        padding: 12px;
        border-radius: 12px;
        margin: 10px 0;
    }

    /* Userbar: кнопка не сжимается */
    .userbar {
        flex-wrap: wrap;
        gap: 8px;
    }
    .userbar .btn.ghost {
        flex-shrink: 0;
    }

    /* Кнопки в .row: по 2 в строке */
    .row .btn,
    .row .btn.ghost,
    .row .btn.outline {
        flex: 1 1 calc(50% - 6px);
        min-width: 0;
        text-align: center;
        box-sizing: border-box;
    }

    /* Кнопки лимита/уровня */
    .limit-buttons {
        gap: 4px;
    }
    .limit-btn {
        padding: 6px 10px;
        font-size: 14px;
    }

    /* Тест */
    .q {
        padding: 10px;
    }
    .options {
        grid-template-columns: 1fr;
    }
    .input-row {
        flex-direction: column;
        align-items: stretch;
    }
    .input-row input[type="text"] {
        width: 100%;
    }
    .result {
        font-size: 14px;
    }

    /* Словарь */
    .dict-right-box {
        margin-bottom: 10px;
    }
    .search-row {
        flex-wrap: wrap;
    }
    .search-row input[type="text"] {
        width: 100%;
        flex: 1 1 100%;
    }

    /* Статистика: таблица сводки */
    #stats-area table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    /* Грамматика */
    .grammar-block {
        padding: 12px;
        margin-bottom: 18px;
    }
    .g-table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    .formula {
        font-size: 14px;
        word-break: break-word;
    }

    /* Кнопки прокрутки */
    .scroll-btn {
        right: 10px;
        width: 38px;
        height: 38px;
    }
    #scroll-top    { bottom: 64px; }
    #scroll-bottom { bottom: 18px; }
}