/* ============================================ */
/* === СТИЛИ ДЛЯ КАТЕГОРИИ IRREGULAR VERBS === */
/* Префикс: iv-                               */
/* ============================================ */

/* --- БАЗОВЫЕ ОБЕРТКИ И ЭКРАНЫ --- */
.iv-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.iv-screen {
    display: none;
    opacity: 1; /* ВАЖНО: никаких анимаций на главном контейнере! */
}

.iv-screen.active {
    display: block;
}

/* --- ЭКРАН СТАРТА --- */
.iv-start {
    background: var(--white);
    border-radius: var(--radius);
    padding: 48px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 2px solid #E2E8F0;
}

.iv-start-icon {
    font-size: 4rem;
    line-height: 1;
    margin-bottom: 16px;
}

.iv-start-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 16px;
}

.iv-start-desc {
    font-size: 1.1rem;
    color: var(--light);
    line-height: 1.6;
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.iv-rules {
    background: var(--bg);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 32px;
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.iv-rule {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
    color: var(--dark);
}

.iv-rule-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
}

.iv-start-btn {
    max-width: 300px;
    margin: 0 auto;
}

/* --- ЭКРАН ВЫБОРА УРОВНЯ/ТЕМЫ --- */
.iv-levels-header {
    text-align: center;
    margin-bottom: 32px;
}

.iv-levels-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 8px;
}

.iv-levels-subtitle {
    font-size: 1.1rem;
    color: var(--light);
}

.iv-levels-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 32px;
}

/* Модификатор для 3 колонок */
.iv-levels-grid--3 {
    grid-template-columns: repeat(3, 1fr);
}

.iv-level-card {
    background: var(--white);
    border: 2px solid #E2E8F0;
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.iv-level-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

/* Специфичные цвета для тем Топ-100 */
.iv-lvl-mind:hover { border-color: #6366F1; box-shadow: 0 8px 16px rgba(99, 102, 241, 0.2); }
.iv-lvl-move:hover { border-color: #10B981; box-shadow: 0 8px 16px rgba(16, 185, 129, 0.2); }
.iv-lvl-action:hover { border-color: #F59E0B; box-shadow: 0 8px 16px rgba(245, 158, 11, 0.2); }
.iv-lvl-advanced:hover { border-color: #EC4899; box-shadow: 0 8px 16px rgba(236, 72, 153, 0.2); }

.iv-level-icon {
    font-size: 3rem;
    line-height: 1;
    margin-bottom: 16px;
}

.iv-level-name {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 8px;
}

.iv-level-count {
    font-size: 0.95rem;
    color: var(--light);
}

/* --- ЭКРАН ИГРЫ --- */
.iv-game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.iv-game-level {
    background: #D1FAE5;
    color: #065F46;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 700;
}

.iv-game-progress {
    font-size: 0.95rem;
    color: var(--light);
}

.iv-game-progress strong {
    color: var(--dark);
}

.iv-progress-bar {
    width: 100%;
    height: 8px;
    background: #E2E8F0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 32px;
}

.iv-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 4px;
    transition: width 0.3s ease;
}

/* Карточка задания */
.iv-task {
    background: var(--white);
    border-radius: var(--radius);
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 2px solid #E2E8F0;
    margin-bottom: 24px;
}

.iv-task-label {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.iv-task-text {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 8px;
    line-height: 1.3;
}

.iv-task-translation {
    font-size: 1.2rem;
    color: var(--light);
    font-style: italic;
    margin-bottom: 24px;
}

.iv-speak-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--bg);
    border: 2px solid #E2E8F0;
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.iv-speak-btn:hover {
    background: var(--white);
    border-color: var(--primary);
    transform: translateY(-2px);
}

/* Варианты ответа */
.iv-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.iv-option {
    padding: 20px;
    background: var(--white);
    border: 2px solid #E2E8F0;
    border-radius: var(--radius);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--dark);
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    text-align: center;
}

.iv-option:hover:not(:disabled) {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.iv-option:disabled {
    cursor: default;
}

.iv-option.correct {
    background: #D1FAE5;
    border-color: #10B981;
    color: #047857;
}

.iv-option.wrong {
    background: #FEE2E2;
    border-color: #EF4444;
    color: #B91C1C;
}

/* Обратная связь */
.iv-feedback {
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 24px;
    animation: iv-fadeIn 0.3s ease;
}

.iv-feedback.correct {
    background: #ECFDF5;
    border-left: 4px solid #10B981;
}

.iv-feedback.wrong {
    background: #FEF2F2;
    border-left: 4px solid #EF4444;
}

.iv-feedback-title {
    font-size: 1.15rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.iv-feedback.correct .iv-feedback-title { color: #047857; }
.iv-feedback.wrong .iv-feedback-title { color: #B91C1C; }

.iv-feedback-text {
    font-size: 1rem;
    color: var(--dark);
    line-height: 1.6;
}

.iv-next-wrapper {
    text-align: right;
}

/* --- ЭКРАН РЕЗУЛЬТАТА --- */
.iv-result-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 48px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 2px solid #E2E8F0;
}

.iv-result-emoji {
    font-size: 4rem;
    line-height: 1;
    margin-bottom: 16px;
}

.iv-result-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 32px;
}

.iv-result-stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 24px;
}

.iv-result-stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 4px;
}

.iv-result-stat-label {
    font-size: 0.9rem;
    color: var(--light);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.iv-result-record {
    display: inline-block;
    background: #FEF3C7;
    color: #92400E;
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.iv-result-message {
    font-size: 1.1rem;
    color: var(--light);
    line-height: 1.6;
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Кнопки результата в 2 столбика */
.iv-result-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    max-width: 600px;
    margin: 0 auto;
}

/* Анимация */
@keyframes iv-fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- СПЕЦИФИЧНЫЕ СТИЛИ ТРЕНАЖЁРОВ --- */

/* Большая кнопка аудирования */
.iv-audio-big-btn {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 110px !important;
    height: 110px !important;
    background: var(--primary) !important;
    color: var(--white) !important;
    border: none !important;
    border-radius: 50% !important;
    font-size: 3.5rem !important;
    cursor: pointer !important;
    margin: 20px auto !important;
    transition: all 0.3s ease !important;
    box-shadow: 0 10px 25px rgba(124, 58, 237, 0.3) !important;
    padding: 0 !important;
    line-height: 1 !important;
}

.iv-audio-big-btn:hover {
    transform: scale(1.08) !important;
    background: var(--primary-dark) !important;
    box-shadow: 0 12px 30px rgba(124, 58, 237, 0.4) !important;
}

.iv-audio-big-btn:active {
    transform: scale(0.95) !important;
}

/* Инпуты для ввода форм */
.iv-forms-inputs {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 24px;
}

.iv-input-group {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    width: 100%;
    max-width: 250px;
}

.iv-input-group label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--light);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.iv-input {
    width: 100%;
    padding: 16px 20px;
    font-size: 1.2rem;
    font-weight: 600;
    font-family: inherit;
    color: var(--dark);
    background: var(--bg);
    border: 2px solid #E2E8F0;
    border-radius: 10px;
    transition: all 0.2s ease;
    outline: none;
}

.iv-input:focus {
    background: var(--white);
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.1);
}

.iv-input.correct {
    background: #D1FAE5;
    border-color: #10B981;
    color: #047857;
}

.iv-input.wrong {
    background: #FEE2E2;
    border-color: #EF4444;
    color: #B91C1C;
    text-decoration: line-through;
}

.iv-check-wrapper {
    text-align: right;
    margin-top: 24px;
}

/* Поиск ошибок */
.iv-sentence-box {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--dark);
    line-height: 1.5;
    margin-bottom: 16px;
    text-align: center;
}

.iv-error-word {
    color: #EF4444;
    text-decoration: line-through;
    text-decoration-thickness: 2px;
    background: #FEF2F2;
    padding: 2px 8px;
    border-radius: 6px;
    font-weight: 800;
}

.iv-correct-word {
    color: #047857;
    background: #ECFDF5;
    padding: 2px 8px;
    border-radius: 6px;
    font-weight: 800;
}

/* Паттерны */
.iv-pattern-box {
    background: #F8FAFC;
    border: 2px dashed #CBD5E1;
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 24px;
    text-align: center;
}

.iv-pattern-rule {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.iv-pattern-example {
    font-size: 2rem;
    font-weight: 800;
    color: var(--dark);
    letter-spacing: 1px;
}

/* Блиц-тест */
.iv-blitz-timer {
    font-size: 2rem;
    font-weight: 800;
    color: var(--dark);
    font-family: 'Courier New', monospace;
    background: var(--white);
    padding: 8px 24px;
    border-radius: 20px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.iv-blitz-score {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--light);
}

.iv-blitz-score strong {
    font-size: 1.5rem;
    color: var(--primary);
    margin-left: 8px;
}

@keyframes iv-pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}


/* ============================================ */
/* === СТИЛИ ДЛЯ ХАБА КАТЕГОРИИ (ГЛАВНАЯ) === */
/* ============================================ */

/* --- С ЧЕГО НАЧАТЬ --- */
.iv-how-to-start {
    padding: 70px 0;
    background: var(--white);
}

.iv-start-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.iv-start-step {
    background: var(--white);
    border: 2px solid #E2E8F0;
    border-radius: var(--radius);
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
}

.iv-start-step::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.iv-start-step:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-hover);
    transform: translateY(-6px);
}

.iv-start-step:hover::before {
    transform: scaleX(1);
}

.iv-start-step-icon {
    font-size: 2.8rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 90px;
    height: 90px;
    background: rgba(124, 58, 237, 0.08);
    border-radius: 50%;
    margin-bottom: 24px;
    transition: transform 0.3s ease;
}

.iv-start-step:hover .iv-start-step-icon {
    transform: scale(1.1);
    background: rgba(124, 58, 237, 0.15);
}

.iv-start-step h3 {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 14px;
    line-height: 1.3;
}

.iv-start-step p {
    font-size: 0.98rem;
    color: #475569;
    line-height: 1.6;
    margin-bottom: 24px;
    min-height: 75px;
}

.iv-start-step .btn-outline {
    background: var(--primary);
    color: var(--white);
    border: none;
    font-weight: 700;
    padding: 12px 28px;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.iv-start-step .btn-outline:hover {
    background: var(--primary-dark);
    box-shadow: 0 6px 15px rgba(124, 58, 237, 0.3);
    transform: translateY(-2px);
}

/* --- ГРУППЫ ПО УРОВНЯМ --- */
.iv-level-group {
    margin-bottom: 60px;
}

.iv-level-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid #E2E8F0;
}

.iv-level-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--dark);
    margin: 0;
}

.iv-level-desc {
    margin-left: auto;
    font-size: 0.95rem;
    color: var(--light);
    font-weight: 600;
}

/* --- СЕТКА В 2 СТОЛБИКА И КАРТОЧКИ --- */
.iv-cat-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.iv-service-card {
    background: var(--white);
    border: 2px solid #E2E8F0;
    border-radius: var(--radius);
    padding: 28px;
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
}

.iv-service-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}

.iv-card-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.iv-card-icon {
    font-size: 2.5rem;
    line-height: 1;
}

.iv-card-tags {
    display: flex;
    gap: 8px;
}

.iv-tag {
    font-size: 0.75rem;
    font-weight: 800;
    padding: 4px 10px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.iv-tag.level-green { background: #D1FAE5; color: #065F46; }
.iv-tag.level-yellow { background: #FEF3C7; color: #92400E; }
.iv-tag.level-red { background: #FEE2E2; color: #991B1B; }

.iv-card-title {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 10px;
    line-height: 1.3;
}

.iv-card-desc {
    font-size: 0.95rem;
    color: var(--light);
    line-height: 1.5;
    margin-bottom: 20px;
    flex-grow: 1;
}

.iv-card-meta {
    display: flex;
    gap: 16px;
    font-size: 0.85rem;
    color: var(--light);
    font-weight: 600;
    margin-bottom: 20px;
}

.iv-card-btn {
    background: var(--primary);
    color: var(--white);
    text-align: center;
    padding: 12px 20px;
    border-radius: 10px;
    font-weight: 600;
    transition: background 0.3s ease;
}

.iv-service-card:hover .iv-card-btn {
    background: var(--primary-dark);
}

/* --- БАННЕРЫ --- */
.iv-banner-section {
    padding: 60px 0;
}

.iv-motivation-banner {
    background: #FFF7ED;
    border-left: 4px solid #F97316;
    border-radius: var(--radius);
    padding: 32px;
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.iv-banner-icon {
    font-size: 3rem;
}

.iv-banner-content {
    flex-grow: 1;
    min-width: 250px;
}

.iv-banner-content h3 {
    font-size: 1.2rem;
    font-weight: 800;
    color: #9A3412;
    margin-bottom: 8px;
}

.iv-banner-content p {
    font-size: 0.95rem;
    color: #C2410C;
    line-height: 1.5;
    margin: 0;
}

/* --- КОМУ ПОДОЙДУТ --- */
.iv-audience-section {
    padding: 60px 0;
    background: var(--white);
}

.iv-audience-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.iv-audience-card {
    background: var(--bg);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
}

.iv-audience-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.iv-audience-card h3 {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 12px;
}

.iv-audience-card p {
    font-size: 0.95rem;
    color: var(--light);
    line-height: 1.5;
    margin: 0;
}

/* ============================================ */
/* === АДАПТИВ === */
/* ============================================ */
@media (max-width: 900px) {
    .iv-start-steps { grid-template-columns: 1fr; gap: 20px; }
    .iv-start-step p { min-height: auto; }
    .iv-cat-grid { grid-template-columns: 1fr; }
    .iv-audience-grid { grid-template-columns: 1fr; }
    .iv-levels-grid--3 { grid-template-columns: 1fr; }
    .iv-motivation-banner { flex-direction: column; text-align: center; }
}

@media (max-width: 600px) {
    .iv-start, .iv-task, .iv-result-card { padding: 24px 20px; }
    .iv-task-text { font-size: 2rem; }
    .iv-options { grid-template-columns: 1fr; }
    .iv-result-stats { gap: 20px; }
    .iv-result-stat-value { font-size: 2rem; }
    .iv-result-actions { grid-template-columns: 1fr; }
    .iv-levels-grid { grid-template-columns: 1fr; }
    .iv-forms-inputs { flex-direction: column; align-items: center; gap: 16px; }
    .iv-input-group { max-width: 100%; }
    .iv-check-wrapper { text-align: center; }
    .iv-level-header { flex-wrap: wrap; }
    .iv-level-desc { margin-left: 0; width: 100%; font-size: 0.85rem; }
    .iv-blitz-timer { font-size: 1.5rem; padding: 6px 16px; order: 3; width: 100%; text-align: center; margin-top: 10px; }
    .iv-blitz-score { margin-left: auto; }
}