/* ============================================================
   style.css — все стили приложения МОВА
   ============================================================ */

/* ---------- CSS переменные ---------- */

:root {
    --bg:           #0a0a0a;
    --card-bg:      #141414;
    --border:       #1e1e1e;
    --border-hover: #333333;
    --text:         #e4e4e4;
    --text-muted:   #888888;
    --accent-blue:  #00d4ff;
    --accent-purple:#7c3aed;
    --accent-green: #22c55e;
    --accent-red:   #ef4444;
    --accent-yellow:#f59e0b;

    --radius:       12px;
    --radius-sm:    8px;
    --gap:          24px;
    --gap-lg:       32px;
    --max-width:    768px;
    --transition:   all 0.3s ease;

    /* Высота нижней навигации */
    --bottom-nav-h: 64px;
}

/* ---------- Reset & base ---------- */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent-blue);
    text-decoration: none;
}

button {
    cursor: pointer;
    font-family: inherit;
    font-size: inherit;
}

input {
    font-family: inherit;
    font-size: inherit;
}

/* ---------- Loading screen ---------- */

#loading {
    position: fixed;
    inset: 0;
    background: var(--bg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    z-index: 9999;
}

#loading .loading-logo {
    font-size: 64px;
    font-weight: 900;
    color: #fff;
    letter-spacing: 8px;
    animation: fadeIn 0.6s ease;
}

.loading-sub {
    font-size: 14px;
    color: var(--text-muted);
    letter-spacing: 1px;
    animation: fadeIn 0.8s ease 0.2s both;
}

/* ---------- Спиннер ---------- */

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner-wrap {
    display: flex;
    justify-content: center;
    margin: 32px 0 16px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ---------- App container ---------- */

#app {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 24px 16px;
    padding-bottom: calc(var(--bottom-nav-h) + 16px + env(safe-area-inset-bottom, 0px));
    padding-left: max(16px, env(safe-area-inset-left, 16px));
    padding-right: max(16px, env(safe-area-inset-right, 16px));
    transition: opacity 0.2s ease;
}

/* ---------- Страница ---------- */

.page {
    display: flex;
    flex-direction: column;
    gap: var(--gap);
    min-height: 80vh;
}

/* ---------- Page nav (заголовок + кнопка назад) ---------- */

.page-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.page-nav h2 {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
}

.page-sub {
    color: var(--text-muted);
    font-size: 14px;
    margin-top: -16px;
    text-align: center;
}

/* ---------- Кнопки ---------- */

.btn-back {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    padding: 8px 16px;
    font-size: 14px;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-back:hover {
    border-color: var(--border-hover);
}

.btn-primary {
    background: var(--accent-blue);
    color: #000;
    font-weight: 700;
    border: none;
    border-radius: var(--radius);
    height: 56px;
    width: 100%;
    font-size: 16px;
    transition: var(--transition);
}

.btn-primary:hover {
    opacity: 0.88;
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    padding: 12px 24px;
    font-size: 15px;
    transition: var(--transition);
}

.btn-secondary:hover {
    border-color: var(--border-hover);
}

.btn-hint {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 50%;
    color: var(--text-muted);
    width: 36px;
    height: 36px;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.btn-hint:hover {
    border-color: var(--border-hover);
}

/* ---------- Карточка ---------- */

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: var(--transition);
}

.card-nav {
    display: flex;
    align-items: center;
    gap: 16px;
    cursor: pointer;
}

.card-nav:hover {
    border-color: var(--border-hover);
}

.card-icon {
    font-size: 32px;
    flex-shrink: 0;
    width: 40px;
    text-align: center;
}

.card-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.card-text strong {
    color: #fff;
    font-size: 16px;
}

.card-text span {
    color: var(--text-muted);
    font-size: 14px;
}

.card-arrow {
    color: var(--text-muted);
    font-size: 18px;
    flex-shrink: 0;
}

/* ---------- Section title ---------- */

.section-title {
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    padding: 8px 0;
}

/* ---------- Главная страница ---------- */

.home-header {
    text-align: center;
    padding: 16px 0 8px;
}

.logo {
    font-size: 48px;
    font-weight: 900;
    color: #fff;
    letter-spacing: 4px;
}

.logo-sub {
    color: var(--text-muted);
    font-size: 16px;
    margin-top: 4px;
}

.logo-quote {
    color: var(--text-muted);
    font-size: 13px;
    margin-top: 8px;
}

/* Статистика */

.stats-row {
    display: flex;
    justify-content: center;
    gap: 0;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.stat-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px 8px;
    gap: 2px;
}

.stat-item + .stat-item {
    border-left: 1px solid var(--border);
}

.stat-icon {
    font-size: 20px;
}

.stat-value {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
}

/* Прогресс блок */

.progress-block {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.progress-bar-wrap {
    background: var(--border);
    border-radius: 8px;
    height: 8px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
    border-radius: 8px;
    transition: width 0.5s ease;
}

.progress-bar-lg {
    height: 12px;
}

.progress-label {
    font-size: 13px;
    color: var(--text-muted);
    text-align: center;
}

/* Карточки разделов */

.cards-nav {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* ---------- Список уроков ---------- */

.module-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.lessons-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.lesson-card {
    display: flex;
    align-items: center;
    gap: 16px;
    cursor: pointer;
}

.lesson-card:hover:not(.lesson-locked) {
    border-color: var(--border-hover);
}

.lesson-locked {
    opacity: 0.4;
    cursor: default;
}

.lesson-num {
    width: 40px;
    height: 40px;
    min-width: 40px;
    background: var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #fff;
    font-size: 15px;
}

.lesson-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.lesson-info strong {
    color: #fff;
    font-size: 15px;
}

.lesson-info span {
    color: var(--text-muted);
    font-size: 13px;
}

.lesson-right {
    flex-shrink: 0;
}

.lesson-stars {
    font-size: 14px;
    letter-spacing: 2px;
}

.lesson-lock {
    font-size: 16px;
}

/* ---------- Страница урока ---------- */

.lesson-header {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.lesson-header h2 {
    font-size: 24px;
    font-weight: 700;
    color: #fff;
}

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

.lesson-progress {
    max-width: 320px;
    margin: 0 auto;
    width: 100%;
}

.lesson-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.loading-text {
    color: var(--text-muted);
    font-size: 14px;
    text-align: center;
}

.lesson-footer {
    display: flex;
    gap: 12px;
    justify-content: space-between;
    padding-top: 8px;
}

.content-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    gap: 0;
}

/* ---------- Словарь ---------- */

.search-wrap {
    position: relative;
}

.search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 18px;
}

.search-input {
    width: 100%;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    padding: 14px 14px 14px 44px;
    outline: none;
    transition: var(--transition);
}

.search-input:focus {
    border-color: var(--accent-blue);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.filter-tags {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: none;
}

.filter-tags::-webkit-scrollbar {
    display: none;
}

.tag {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--text-muted);
    padding: 6px 14px;
    font-size: 13px;
    white-space: nowrap;
    cursor: pointer;
    transition: var(--transition);
}

.tag:hover {
    border-color: var(--border-hover);
    color: var(--text);
}

.tag-active {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

.words-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.word-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.word-card strong {
    color: #fff;
}

.word-card span {
    color: var(--text-muted);
    font-size: 14px;
}

/* ---------- Пустое состояние ---------- */

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 48px 16px;
    color: var(--text);
    text-align: center;
    font-size: 16px;
}

.empty-sub {
    color: var(--text-muted);
    font-size: 14px;
}

.error-text {
    color: var(--accent-red);
    text-align: center;
    padding: 48px;
}

/* ---------- Прогресс страница ---------- */

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.stat-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 20px 12px;
    text-align: center;
}

.stat-card-icon {
    font-size: 28px;
}

.stat-card-value {
    font-size: 28px;
    font-weight: 700;
    color: #fff;
}

.stat-card-label {
    font-size: 12px;
    color: var(--text-muted);
}

/* Достижения */

.achievements-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.achievement {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 16px 12px;
    text-align: center;
}

.achievement strong {
    font-size: 14px;
    color: #fff;
}

.achievement span {
    font-size: 12px;
    color: var(--text-muted);
}

.achievement-icon {
    font-size: 28px;
}

.achievement-locked {
    opacity: 0.4;
}

.achievement-done {
    border-color: var(--accent-yellow);
    opacity: 1;
}

/* ---------- Нижняя навигация (только мобильные) ---------- */

#bottom-nav {
    display: none;
}

@media (max-width: 767px) {
    #bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        height: calc(var(--bottom-nav-h) + env(safe-area-inset-bottom, 0px));
        padding-bottom: env(safe-area-inset-bottom, 0px);
        background: var(--card-bg);
        border-top: 1px solid var(--border);
        z-index: 100;
        transition: transform 0.3s ease;
    }

    #bottom-nav.nav-hidden {
        transform: translateY(100%);
    }

    #app {
        padding-bottom: calc(var(--bottom-nav-h) + env(safe-area-inset-bottom, 0px) + 16px);
    }
}

.bottom-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
    background: transparent;
    border: none;
    padding: 0;
}

.bottom-nav-item:hover,
.bottom-nav-item.active {
    color: var(--accent-blue);
}

.bottom-nav-icon {
    font-size: 22px;
}

.bottom-nav-label {
    font-size: 10px;
    font-weight: 500;
}

/* ---------- Адаптивность ---------- */

/* Планшет */
@media (min-width: 768px) {
    #app {
        padding: 32px 24px;
        padding-bottom: 32px;
    }

    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .achievements-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Десктоп */
@media (min-width: 1024px) {
    #app {
        padding: 40px 32px;
    }
}

/* ============================================================
   ТЗ 2: Алфавит, упражнения, карточки слов, урок
   ============================================================ */

/* ---------- Анимации ---------- */

.fade-in {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

.shake {
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%       { transform: translateX(-6px); }
    40%       { transform: translateX(6px); }
    60%       { transform: translateX(-4px); }
    80%       { transform: translateX(4px); }
}

.exercise-fade-in {
    animation: fadeIn 0.25s ease;
}

/* ---------- Вспомогательные ---------- */

.text-blue  { color: var(--accent-blue); }
.text-green { color: var(--accent-green); }
.text-red   { color: var(--accent-red); }
.hidden     { display: none !important; }

/* ---------- Intro block (алфавит) ---------- */

.intro-block {
    background: #1a1127;
    border-left: 3px solid var(--accent-purple);
    border-radius: var(--radius);
    padding: 16px 20px;
    color: var(--text);
    font-size: 15px;
    line-height: 1.7;
}

/* ---------- Сетка букв ---------- */

.letter-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

@media (min-width: 480px) { .letter-grid { grid-template-columns: repeat(4, 1fr); } }
@media (min-width: 640px) { .letter-grid { grid-template-columns: repeat(5, 1fr); } }

.letter-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 12px 8px 10px;
    gap: 3px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.letter-card:hover { border-color: var(--accent-blue); }
.letter-has-note   { cursor: pointer; }

.letter-main {
    font-size: 36px;
    font-weight: 700;
    color: #fff;
    line-height: 1;
}

.letter-name {
    font-size: 11px;
    color: var(--text-muted);
    text-align: center;
}

.letter-sound {
    font-size: 11px;
    color: var(--accent-blue);
    text-align: center;
}

.letter-example {
    font-size: 10px;
    color: var(--text-muted);
    text-align: center;
    line-height: 1.3;
}

.letter-audio {
    background: transparent;
    border: none;
    font-size: 14px;
    cursor: pointer;
    padding: 0;
    margin-top: 2px;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.letter-audio:hover { opacity: 1; }

/* Заметка буквы — показывается при клике */
.letter-note-text {
    display: none;
    font-size: 11px;
    color: var(--accent-yellow);
    text-align: center;
    margin-top: 4px;
    line-height: 1.4;
}

.letter-note-open .letter-note-text { display: block; }
.letter-note-open { border-color: var(--accent-yellow); }

/* ---------- Таблица отличий ---------- */

.diff-table-wrap {
    overflow-x: auto;
    border-radius: var(--radius);
}

.diff-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.diff-table th,
.diff-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    text-align: left;
}

.diff-table th {
    color: var(--text-muted);
    font-weight: 600;
    font-size: 11px;
    letter-spacing: 1px;
    text-transform: uppercase;
    background: var(--card-bg);
}

.diff-table tr:hover td { background: rgba(255,255,255,0.02); }

.diff-ru { color: var(--text-muted); }
.diff-be { color: var(--accent-blue); font-weight: 600; }
.diff-ex { color: var(--text-muted); font-style: italic; }

/* ---------- Блоки правил ---------- */

.rules-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.rule-block {
    border-left: 3px solid var(--accent-purple);
}

.rule-title {
    font-weight: 700;
    color: var(--accent-purple);
    margin-bottom: 6px;
    font-size: 14px;
}

.rule-text {
    font-size: 14px;
    color: var(--text);
    line-height: 1.6;
}

.rule-be {
    color: var(--accent-blue);
    font-weight: 600;
}

/* ---------- Упражнения ---------- */

.ex-box {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 4px 0;
}

.ex-question {
    font-size: 18px;
    font-weight: 600;
    color: #fff;
    line-height: 1.4;
}

.ex-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ex-option {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    padding: 14px 16px;
    text-align: left;
    font-size: 15px;
    transition: var(--transition);
    cursor: pointer;
    width: 100%;
}

.ex-option:hover:not([disabled]) { border-color: var(--accent-blue); }
.ex-option[disabled]             { cursor: default; }

.ex-correct { background: rgba(34,197,94,0.15); border-color: var(--accent-green) !important; color: var(--accent-green); }
.ex-wrong   { background: rgba(239,68,68,0.15);  border-color: var(--accent-red) !important;  color: var(--accent-red); }

.ex-feedback-ok   { background: rgba(34,197,94,0.12);  border: 1px solid var(--accent-green);  border-radius: var(--radius-sm); padding: 12px 16px; color: var(--accent-green);  font-size: 14px; }
.ex-feedback-err  { background: rgba(239,68,68,0.12);   border: 1px solid var(--accent-red);    border-radius: var(--radius-sm); padding: 12px 16px; color: var(--accent-red);   font-size: 14px; }
.ex-feedback-hint { background: rgba(245,158,11,0.12); border: 1px solid var(--accent-yellow); border-radius: var(--radius-sm); padding: 12px 16px; color: var(--accent-yellow); font-size: 14px; }

.ex-points {
    float: right;
    font-weight: 700;
    color: var(--accent-yellow);
}

/* ---------- Match pairs ---------- */

.match-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.match-col {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.match-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    padding: 10px 12px;
    font-size: 14px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.match-item:hover:not([disabled]) { border-color: var(--accent-blue); }
.match-selected { border-color: var(--accent-blue) !important; color: var(--accent-blue); }
.match-done     { border-color: var(--accent-green) !important; color: var(--accent-green); background: rgba(34,197,94,0.1); opacity: 0.7; }
.match-wrong    { border-color: var(--accent-red) !important; color: var(--accent-red); }

/* ---------- Build sentence ---------- */

.build-zone {
    min-height: 56px;
    background: var(--card-bg);
    border: 1px dashed var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}

.build-placeholder {
    color: var(--text-muted);
    font-size: 14px;
}

.build-bank {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 4px;
}

.build-word {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--text);
    padding: 6px 14px;
    font-size: 15px;
    cursor: pointer;
    transition: var(--transition);
}

.build-word:hover:not([disabled]) { border-color: var(--accent-blue); }
.build-word-used                  { border-color: var(--accent-blue); color: var(--accent-blue); cursor: pointer; }

/* ---------- Type answer ---------- */

.type-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.type-input {
    width: 100%;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    padding: 14px 48px 14px 16px;
    font-size: 16px;
    outline: none;
    transition: var(--transition);
}

.type-input:focus { border-color: var(--accent-blue); }
.type-input::placeholder { color: var(--text-muted); }

.type-wrap .btn-hint {
    position: absolute;
    right: 10px;
    font-size: 18px;
    width: 32px;
    height: 32px;
}

/* ---------- Flashcard ---------- */

.flashcard-scene {
    perspective: 800px;
    width: 100%;
    height: 200px;
    margin: 8px 0;
}

.flashcard {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.5s ease;
    cursor: pointer;
}

.flashcard.flipped { transform: rotateY(180deg); }

.flashcard-front,
.flashcard-back {
    position: absolute;
    inset: 0;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    padding: 20px;
}

.flashcard-back { transform: rotateY(180deg); }

.fc-text {
    font-size: 28px;
    font-weight: 700;
    color: #fff;
    text-align: center;
}

.fc-audio-btn {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    font-size: 16px;
    cursor: pointer;
    color: var(--text-muted);
    transition: var(--transition);
}

.fc-audio-btn:hover { border-color: var(--accent-blue); }

.fc-actions {
    display: flex;
    gap: 8px;
}

.btn-fc-no {
    flex: 1;
    background: rgba(239,68,68,0.15);
    border: 1px solid var(--accent-red);
    border-radius: var(--radius-sm);
    color: var(--accent-red);
    padding: 12px;
    font-size: 15px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-fc-yes {
    flex: 1;
    background: rgba(34,197,94,0.15);
    border: 1px solid var(--accent-green);
    border-radius: var(--radius-sm);
    color: var(--accent-green);
    padding: 12px;
    font-size: 15px;
    cursor: pointer;
    transition: var(--transition);
}

/* ---------- Multiple choice ---------- */

.mc-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mc-label {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    cursor: pointer;
    transition: var(--transition);
}

.mc-label:hover { border-color: var(--border-hover); }

.mc-check {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-blue);
    cursor: pointer;
}

.mc-text { font-size: 15px; color: var(--text); }

.mc-correct { border-color: var(--accent-green) !important; background: rgba(34,197,94,0.1); }
.mc-wrong   { border-color: var(--accent-red) !important;   background: rgba(239,68,68,0.1); }
.mc-missed  { border-color: var(--accent-yellow) !important; }

/* ---------- Финальный тест ---------- */

.test-wrap {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.test-header {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.test-counter {
    font-size: 13px;
    color: var(--text-muted);
    text-align: right;
}

.test-result {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 32px 0;
    text-align: center;
}

.test-result-stars { font-size: 36px; letter-spacing: 4px; }
.test-result-title { font-size: 24px; font-weight: 700; color: #fff; }
.test-result-score { color: var(--text-muted); font-size: 16px; }
.test-result-points { color: var(--accent-yellow); font-size: 16px; }

/* ---------- Карточки слов в уроке ---------- */

.words-grid {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.word-item {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.word-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
}

.word-left {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.word-be {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
}

.word-transcription {
    font-size: 13px;
    color: var(--accent-blue);
}

.word-audio-btn {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 6px 10px;
    font-size: 16px;
    cursor: pointer;
    color: var(--text-muted);
    transition: var(--transition);
    flex-shrink: 0;
}

.word-audio-btn:hover { border-color: var(--accent-blue); }

.word-ru {
    color: var(--text-muted);
    font-size: 15px;
}

.word-example {
    font-size: 13px;
    color: var(--text-muted);
    font-style: italic;
    border-left: 2px solid var(--border);
    padding-left: 10px;
}

.word-note {
    display: inline-block;
    background: rgba(124,58,237,0.15);
    border: 1px solid rgba(124,58,237,0.3);
    border-radius: 12px;
    color: var(--accent-purple);
    font-size: 11px;
    padding: 2px 8px;
    align-self: flex-start;
}

.word-lesson-tag {
    display: inline-block;
    background: rgba(0,212,255,0.1);
    border-radius: 8px;
    color: var(--accent-blue);
    font-size: 11px;
    padding: 1px 6px;
    margin-left: 6px;
}

/* ---------- Диалог ---------- */

.dialogue-wrap {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.dialogue-line {
    display: flex;
    gap: 10px;
    align-items: flex-start;
}

.dialogue-avatar {
    width: 36px;
    height: 36px;
    min-width: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 15px;
    flex-shrink: 0;
}

.avatar-a { background: rgba(0,212,255,0.2);  color: var(--accent-blue); }
.avatar-б { background: rgba(124,58,237,0.2); color: var(--accent-purple); }
.avatar-b { background: rgba(124,58,237,0.2); color: var(--accent-purple); }

.dialogue-bubble {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.dialogue-name {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 600;
}

.dialogue-be {
    color: #fff;
    font-size: 15px;
}

.dialogue-ru {
    color: var(--text-muted);
    font-size: 13px;
    font-style: italic;
    border-top: 1px solid var(--border);
    padding-top: 6px;
    margin-top: 2px;
}

/* ---------- Fun fact ---------- */

.fun-fact-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    text-align: center;
    border-left: 3px solid var(--accent-yellow);
}

.fun-fact-flag { font-size: 32px; }

.fun-fact-be {
    font-size: 15px;
    color: #fff;
    font-style: italic;
}

.fun-fact-ru {
    font-size: 13px;
    color: var(--text-muted);
}

/* ---------- Грамматика ---------- */

.grammar-block {
    background: #1a1127;
    border-left: 3px solid var(--accent-purple);
    border-radius: var(--radius-sm);
    padding: 16px;
}

.grammar-title {
    font-weight: 700;
    color: var(--accent-purple);
    margin-bottom: 8px;
    font-size: 15px;
}

.grammar-text {
    font-size: 14px;
    color: var(--text);
    line-height: 1.7;
}

.tip-block {
    background: rgba(245,158,11,0.1);
    border: 1px solid rgba(245,158,11,0.3);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    color: var(--accent-yellow);
    font-size: 14px;
}

/* ---------- Секции урока ---------- */

.lesson-sections {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.lesson-section-item {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.section-intro, .section-review {
    font-size: 15px;
    line-height: 1.7;
}

.section-title-wrap { margin-bottom: -8px; }

/* ---------- Завершение урока ---------- */

.complete-block {
    text-align: center;
    padding: 32px 20px;
}

.complete-stars {
    font-size: 36px;
    letter-spacing: 4px;
    margin-bottom: 8px;
}

.complete-block h3 {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 8px;
}

/* ---------- Аудио-тост ---------- */

.audio-toast {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 20px;
    font-size: 14px;
    color: var(--text-muted);
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
    white-space: nowrap;
    z-index: 1000;
}

.audio-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ---------- Listen stub ---------- */

.listen-stub {
    background: rgba(0,212,255,0.1);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
    font-size: 16px;
    text-align: center;
    padding: 16px;
}

/* ---------- Alpha exercises ---------- */

.alpha-exercises {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.alpha-ex {
    min-height: 20px;
}

/* ---------- Ошибка загрузки ---------- */

.fetch-error {
    text-align: center;
    padding: 32px 20px;
    border-color: var(--accent-yellow);
}

.fetch-error code {
    background: var(--border);
    border-radius: 4px;
    padding: 1px 6px;
    font-family: monospace;
    font-size: 13px;
    color: var(--accent-blue);
}

.fetch-error-code {
    background: #111;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 16px;
    font-family: monospace;
    font-size: 14px;
    color: var(--accent-green);
    text-align: left;
    display: inline-block;
    width: 100%;
    box-sizing: border-box;
}

/* ============================================================
   Аудио-кнопки
   ============================================================ */

.audio-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: var(--card);
    cursor: pointer;
    font-size: 18px;
    transition: all 0.3s ease;
    flex-shrink: 0;
    padding: 0;
}

.audio-btn:hover {
    border-color: var(--accent-blue);
    background: rgba(0, 212, 255, 0.1);
}

.audio-btn.playing {
    border-color: var(--accent-blue);
    background: rgba(0, 212, 255, 0.15);
    animation: pulse-audio 1s infinite;
}

@keyframes pulse-audio {
    0%   { transform: scale(1);    box-shadow: 0 0 0 0   rgba(0, 212, 255, 0.4); }
    50%  { transform: scale(1.05); box-shadow: 0 0 0 8px rgba(0, 212, 255, 0); }
    100% { transform: scale(1);    box-shadow: 0 0 0 0   rgba(0, 212, 255, 0); }
}

.audio-btn-sm {
    width: 32px;
    height: 32px;
    font-size: 14px;
}

/* ============================================================
   Словарь
   ============================================================ */

.dict-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-bottom: 16px;
}

.dict-stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.dict-stat-val {
    font-size: 22px;
    font-weight: 700;
}

.dict-stat-lbl {
    font-size: 11px;
    color: var(--text-muted);
    text-align: center;
}

.dict-word-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    margin-bottom: 8px;
}

.dict-word-locked {
    opacity: 0.45;
}

.dict-word-body {
    flex: 1;
    min-width: 0;
}

.dict-word-be {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.dict-word-tr {
    font-size: 12px;
    color: var(--accent-blue);
    font-weight: 400;
}

.dict-word-ru {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.dict-word-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.dict-lesson-tag {
    font-size: 11px;
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent-blue);
    border-radius: 4px;
    padding: 2px 6px;
}

/* ============================================================
   Разговорник
   ============================================================ */

.phrase-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.phrase-card:hover {
    border-color: var(--accent-blue);
}

.phrase-body {
    flex: 1;
    min-width: 0;
}

.phrase-be {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 3px;
}

.phrase-ru {
    font-size: 13px;
    color: var(--text-muted);
}

/* ============================================================
   Главная: баннер повторения
   ============================================================ */

.review-banner {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    margin-bottom: 8px;
    cursor: pointer;
    border-color: rgba(124, 58, 237, 0.5);
    background: rgba(124, 58, 237, 0.08);
    transition: border-color 0.2s ease, background 0.2s ease;
}

.review-banner:hover {
    border-color: var(--accent-purple);
    background: rgba(124, 58, 237, 0.15);
}

.review-banner-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.review-banner-text strong {
    font-size: 15px;
    color: #c4b5fd;
}

.review-banner-text span {
    font-size: 13px;
    color: var(--text-muted);
}

/* ============================================================
   Страница повторения
   ============================================================ */

.page-review .ex-box {
    margin-top: 0;
}

.btn-fc-yes,
.btn-fc-no {
    flex: 1;
    padding: 12px;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: opacity 0.2s ease;
}

.btn-fc-yes {
    background: var(--accent-green);
    color: #000;
}

.btn-fc-no {
    background: var(--accent-red);
    color: #fff;
}

.btn-fc-yes:hover,
.btn-fc-no:hover {
    opacity: 0.85;
}

/* ============================================================
   Прогресс: график активности
   ============================================================ */

.activity-grid {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 4px;
    margin-top: 8px;
}

.activity-cell {
    aspect-ratio: 1;
    border-radius: 3px;
    background: var(--border);
}

.activity-active {
    background: var(--accent-green);
    opacity: 0.8;
}

/* Larger bar on progress page */
.progress-bar-lg {
    height: 12px;
    border-radius: 6px;
}

/* ============================================================
   Уведомления (тосты)
   ============================================================ */

.notifications-container,
#notifications {
    position: fixed;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    width: min(calc(100vw - 32px), 400px);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.notification,
.notification-item {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    box-shadow: 0 4px 16px rgba(0,0,0,0.4);
    pointer-events: auto;
    animation: notif-in 0.3s ease;
    cursor: pointer;
}

@keyframes notif-in {
    from { opacity: 0; transform: translateY(-12px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
    from { opacity: 1; transform: translateY(0); }
    to   { opacity: 0; transform: translateY(-8px); }
}

.notification-success { border-color: var(--accent-green); }
.notification-error   { border-color: var(--accent-red); }
.notification-achievement { border-color: var(--accent-purple); background: rgba(124,58,237,0.12); }
.notification-points  { border-color: var(--accent-yellow); }

/* ============================================================
   Анимации
   ============================================================ */

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes cardEnter {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes correctPulse {
    0%   { box-shadow: 0 0 0 0   rgba(34, 197, 94, 0.6); }
    50%  { box-shadow: 0 0 0 10px rgba(34, 197, 94, 0); }
    100% { box-shadow: 0 0 0 0   rgba(34, 197, 94, 0); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%       { transform: translateX(-8px); }
    40%       { transform: translateX(8px); }
    60%       { transform: translateX(-6px); }
    80%       { transform: translateX(6px); }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-20px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Анимация входа страницы */
.page {
    animation: fadeIn 0.25s ease;
}

/* Анимация карточек в списке (stagger) */
.card:nth-child(1)  { animation: cardEnter 0.2s ease 0.00s both; }
.card:nth-child(2)  { animation: cardEnter 0.2s ease 0.04s both; }
.card:nth-child(3)  { animation: cardEnter 0.2s ease 0.08s both; }
.card:nth-child(4)  { animation: cardEnter 0.2s ease 0.12s both; }
.card:nth-child(5)  { animation: cardEnter 0.2s ease 0.16s both; }
.card:nth-child(6)  { animation: cardEnter 0.2s ease 0.20s both; }
.card:nth-child(7)  { animation: cardEnter 0.2s ease 0.24s both; }
.card:nth-child(8)  { animation: cardEnter 0.2s ease 0.28s both; }

/* Правильный / неправильный ответ */
.answer-correct {
    animation: correctPulse 0.6s ease;
    border-color: var(--accent-green) !important;
}

.answer-wrong {
    animation: shake 0.4s ease;
    border-color: var(--accent-red) !important;
}

/* Флэшкарточка — 3D переворот */
.flashcard-scene {
    perspective: 1000px;
    width: 100%;
    height: 160px;
    margin-bottom: 16px;
}

.flashcard {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.5s ease;
}

.flashcard.flipped {
    transform: rotateY(180deg);
}

.flashcard-front,
.flashcard-back {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 20px;
}

.flashcard-back {
    transform: rotateY(180deg);
    border-color: var(--accent-blue);
}

.fc-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
}

.fc-audio-btn {
    background: none;
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    font-size: 16px;
    cursor: pointer;
    color: var(--text-muted);
    transition: border-color 0.2s ease;
}

.fc-audio-btn:hover {
    border-color: var(--accent-blue);
}

/* Прогресс-бар плавная анимация */
.progress-bar-fill {
    transition: width 0.6s ease;
}

/* ============================================================
   Скроллбар
   ============================================================ */

::-webkit-scrollbar {
    width: 4px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

::-webkit-scrollbar-thumb:hover {
    background: #444;
}

/* ============================================================
   PWA Install Prompt
   ============================================================ */

#install-prompt-container {
    position: fixed;
    bottom: calc(var(--bottom-nav-h) + env(safe-area-inset-bottom, 0px) + 8px);
    left: 50%;
    transform: translateX(-50%);
    width: min(calc(100vw - 32px), 480px);
    z-index: 200;
}

@media (min-width: 768px) {
    #install-prompt-container {
        bottom: 24px;
    }
}

.install-prompt {
    background: var(--card);
    border: 1px solid var(--accent-purple);
    border-radius: var(--radius);
    padding: 14px 16px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.5);
    animation: slideDown 0.3s ease;
}

.install-prompt-body {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.install-prompt-icon {
    font-size: 28px;
    flex-shrink: 0;
}

.install-prompt-body > div {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.install-prompt-body strong {
    font-size: 14px;
    color: var(--text-primary);
}

.install-prompt-body span {
    font-size: 12px;
    color: var(--text-muted);
}

.install-prompt-actions {
    display: flex;
    gap: 8px;
}

.btn-install {
    flex: 1;
    padding: 10px;
    background: var(--accent-purple);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s ease;
}

.btn-install:hover {
    opacity: 0.85;
}

.btn-install-dismiss {
    padding: 10px 14px;
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    cursor: pointer;
    transition: color 0.2s ease;
}

.btn-install-dismiss:hover {
    color: var(--text-primary);
}

/* ============================================================
   User Bar (Firebase Auth)
   ============================================================ */

.user-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 4px;
}

/* Авторизованный пользователь */
.user-bar-auth {
    border-color: rgba(0, 212, 255, 0.2);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    border: 2px solid var(--accent-blue);
}

.user-avatar-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-blue);
    color: #000;
    font-weight: 700;
    font-size: 16px;
}

.user-bar-info {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 6px;
    min-width: 0;
}

.user-bar-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sync-icon {
    font-size: 14px;
    flex-shrink: 0;
    cursor: default;
    display: inline-block;
}

.btn-signout {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 12px;
    padding: 5px 10px;
    cursor: pointer;
    flex-shrink: 0;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.btn-signout:hover {
    color: var(--accent-red);
    border-color: var(--accent-red);
}

/* Анонимный пользователь */
.user-bar-anon {
    border-color: rgba(245, 158, 11, 0.2);
    background: rgba(245, 158, 11, 0.04);
}

.user-bar-anon-text {
    flex: 1;
    font-size: 12px;
    color: var(--text-muted);
}

/* Кнопка "Войти через Google" */
.btn-signin {
    display: flex;
    align-items: center;
    background: #fff;
    color: #3c4043;
    border: 1px solid #dadce0;
    border-radius: 4px;
    padding: 7px 12px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    flex-shrink: 0;
    white-space: nowrap;
    transition: box-shadow 0.2s ease;
    font-family: inherit;
}

.btn-signin:hover {
    box-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

/* ---------- Онбординг ---------- */

#onboarding-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding: 24px 24px max(24px, env(safe-area-inset-bottom));
    animation: fadeIn 0.4s ease;
}

.onboarding-skip {
    align-self: flex-end;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 14px;
    cursor: pointer;
    padding: 4px 0;
    font-family: inherit;
}

.onboarding-slides {
    flex: 1;
    display: flex;
    align-items: center;
    width: 100%;
    max-width: var(--max-width);
    overflow: hidden;
    position: relative;
}

.onboarding-slide {
    position: absolute;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 16px;
    opacity: 0;
    transform: translateX(60px);
    transition: opacity 0.35s ease, transform 0.35s ease;
    pointer-events: none;
}

.onboarding-slide.active {
    opacity: 1;
    transform: translateX(0);
    pointer-events: auto;
}

.onboarding-slide.exit {
    opacity: 0;
    transform: translateX(-60px);
}

.onboarding-icon {
    font-size: 72px;
    line-height: 1;
}

.onboarding-title {
    font-size: 26px;
    font-weight: 700;
    color: var(--text);
    margin: 0;
}

.onboarding-desc {
    font-size: 16px;
    color: var(--text-muted);
    line-height: 1.6;
    max-width: 320px;
    margin: 0;
}

.onboarding-dots {
    display: flex;
    gap: 8px;
    margin: 16px 0;
}

.onboarding-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border-hover);
    transition: background 0.3s ease, transform 0.3s ease;
}

.onboarding-dot.active {
    background: var(--accent-blue);
    transform: scale(1.3);
}

.onboarding-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    width: 100%;
    max-width: var(--max-width);
}

.btn-onboarding-next {
    width: 100%;
    padding: 16px;
    background: var(--accent-blue);
    color: #000;
    border: none;
    border-radius: var(--radius);
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    font-family: inherit;
    transition: opacity 0.2s ease;
}

.btn-onboarding-next:hover { opacity: 0.9; }

.btn-onboarding-signin {
    width: 100%;
    padding: 14px;
    background: #fff;
    color: #333;
    border: none;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: opacity 0.2s ease;
}

.btn-onboarding-signin:hover { opacity: 0.9; }