:root {
    --bg-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --card-bg: rgba(255, 255, 255, 0.85);
    --text-color: #2d3748;
    --primary-color: #2c5282;
    --success-color: #38a169;
    --error-color: #e53e3e;
    --btn-hover: rgba(255, 255, 255, 0.95);
    --btn-danger: #fc8181;
    --button-bg: rgba(255, 255, 255, 0.9);
    --button-text: #2d3748;
    --card-border: 1px solid rgba(255, 255, 255, 0.4);
    --input-bg: rgba(255, 255, 255, 0.9);
    --input-border: #cbd5e0;
    --item-bg: rgba(255, 255, 255, 0.6);
}

body[data-theme="dark"] {
    --bg-gradient: linear-gradient(135deg, #1e1346 0%, #0b071a 100%);
    --card-bg: rgba(26, 22, 38, 0.7);
    --text-color: #e2e8f0;
    --primary-color: #a0aec0;
    --success-color: #48bb78;
    --error-color: #f56565;
    --btn-hover: rgba(45, 38, 64, 0.9);
    --btn-danger: #e53e3e;
    --button-bg: rgba(39, 32, 58, 0.8);
    --button-text: #e2e8f0;
    --card-border: 1px solid rgba(255, 255, 255, 0.1);
    --input-bg: rgba(21, 17, 34, 0.8);
    --input-border: #443c5b;
    --item-bg: rgba(30, 25, 44, 0.7);
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-gradient);
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-color);
    transition: background 0.3s ease;
    overflow-x: hidden;
    
    /* Мобильные оптимизации PWA */
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    overscroll-behavior-y: none;
}

input {
    user-select: auto;
}

.app-container {
    width: 100%;
    max-width: 480px;
    margin: auto 0;
    padding: max(72px, calc(env(safe-area-inset-top) + 56px)) max(18px, env(safe-area-inset-right)) max(28px, env(safe-area-inset-bottom)) max(18px, env(safe-area-inset-left));
    display: flex;
    flex-direction: column;
    position: relative;
}

@media (min-width: 640px) {
    .app-container {
        padding: 40px 20px 30px 20px;
    }
}

/* Верхняя панель настроек уже добавлена */

/* Скрытие и показ экранов */
.screen {
    display: none;
    flex-direction: column;
    gap: 20px;
}
.screen.active {
    display: flex;
    animation: fadeIn 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.hidden {
    display: none !important;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

header {
    text-align: center;
    color: white;
}
body[data-theme="dark"] header {
    color: #e2e8f0;
}

h1 {
    font-weight: 800;
    font-size: 28px;
    margin-bottom: 5px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.subtitle {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 10px;
}

.stats {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: 8px 20px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

.stat-item {
    font-weight: 600;
    font-size: 18px;
    color: white;
}

.stats-bar {
    display: flex;
    justify-content: center;
    gap: 15px;
    align-items: center;
    margin-top: 10px;
}

.streak-container {
    display: inline-block;
    background: linear-gradient(90deg, #ff8a00, #e52e71);
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 800;
    font-size: 16px;
    color: white;
    box-shadow: 0 4px 15px rgba(229, 46, 113, 0.5);
    transition: all 0.3s ease;
}
.streak-container.hidden {
    display: none;
}
.streak-container.pop-anim {
    animation: pop 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: var(--card-border);
    padding: 40px 20px;
    border-radius: 24px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin-bottom: 15px;
}

h2 {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: 1px;
}

/* Меню кнопок */
.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.mode-btn {
    background: var(--button-bg);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    color: var(--button-text);
    border: var(--card-border);
    padding: 16px;
    border-radius: 16px;
    font-size: 18px;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    touch-action: manipulation;
}
.mode-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.1);
}
.mode-btn.danger {
    color: #e53e3e;
    background: #fff5f5;
}
body[data-theme="dark"] .mode-btn.danger {
    background: #441c1c;
    color: #feb2b2;
}
.mode-btn.secondary {
    background: rgba(255, 255, 255, 0.9);
    color: #1a365d;
    border: 1px solid rgba(255, 255, 255, 0.95);
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
    backdrop-filter: blur(5px);
}
.mode-btn.secondary:hover {
    background: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
}
body[data-theme="dark"] .mode-btn.secondary {
    background: rgba(255, 255, 255, 0.08);
    color: #e2e8f0;
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: none;
}
body[data-theme="dark"] .mode-btn.secondary:hover {
    background: rgba(255, 255, 255, 0.14);
}

/* Кнопки ответов */
.options-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.option-btn {
    background: var(--button-bg);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    color: var(--button-text);
    border: var(--card-border);
    padding: 16px;
    border-radius: 16px;
    font-size: 20px;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: all 0.2s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    touch-action: manipulation;
}
.option-btn:hover {
    transform: translateY(-3px);
    background: var(--btn-hover);
    box-shadow: 0 6px 12px rgba(0,0,0,0.1);
}
.hotkey-badge {
    display: none;
}
@media (hover: hover) and (pointer: fine) {
    .hotkey-badge {
        display: inline-block;
        position: absolute;
        right: 15px;
        background: rgba(0,0,0,0.1);
        padding: 4px 8px;
        border-radius: 8px;
        font-size: 12px;
        color: var(--primary-color);
    }
    body[data-theme="dark"] .hotkey-badge {
        background: rgba(255,255,255,0.1);
        color: var(--text-color);
    }
}
.option-btn.correct-anim {
    background: var(--success-color);
    color: white;
    animation: pop 0.25s ease;
}
.option-btn.error-anim {
    background: var(--error-color);
    color: white;
    animation: shake 0.25s ease;
}
.option-btn.error-anim .hotkey-badge,
.option-btn.correct-anim .hotkey-badge {
    opacity: 0.5;
    color: white;
}

/* Экран результатов */
.result-card h2 {
    font-size: 24px;
    margin-bottom: 15px;
}
.result-score {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
}
.result-score span {
    color: var(--success-color);
    font-size: 28px;
}
.result-mistakes {
    font-size: 16px;
    color: var(--error-color);
}

.exit-btn {
    margin-top: 15px;
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.95);
    color: #1a365d;
    padding: 14px;
    border-radius: 12px;
    width: 100%;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    touch-action: manipulation;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    transition: all 0.2s ease;
}
.exit-btn:hover {
    background: #ffffff;
    transform: translateY(-1px);
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.08);
}
body[data-theme="dark"] .exit-btn {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #e2e8f0;
    box-shadow: none;
}
body[data-theme="dark"] .exit-btn:hover {
    background: rgba(255, 255, 255, 0.14);
}

/* Экран словаря */
.dict-card {
    padding: 20px;
    margin-bottom: 15px;
}
.input-group {
    display: flex;
    gap: 10px;
}
#new-word-input {
    flex: 1;
    padding: 14px;
    background: var(--input-bg);
    color: var(--text-color);
    border: 2px solid var(--input-border);
    border-radius: 12px;
    font-size: 18px;
    font-family: 'Inter', sans-serif;
    outline: none;
    transition: border-color 0.2s;
}
#new-word-input:focus {
    border-color: #667eea;
}
.add-word-btn {
    background: var(--bg-gradient);
    color: white;
    border: none;
    width: 50px;
    border-radius: 12px;
    font-size: 24px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    touch-action: manipulation;
}
.top-settings {
    position: fixed;
    top: max(14px, env(safe-area-inset-top));
    right: max(14px, env(safe-area-inset-right));
    display: flex;
    gap: 8px;
    z-index: 1000;
}

@media (min-width: 640px) {
    .top-settings {
        top: 24px;
        right: 28px;
        gap: 10px;
    }
}

.icon-btn {
    background: var(--button-bg);
    border: 1px solid var(--card-border);
    font-size: 18px;
    cursor: pointer;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    color: var(--button-text);
    transition: transform 0.2s, background-color 0.2s;
    touch-action: manipulation;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

@media (min-width: 640px) {
    .icon-btn {
        width: 44px;
        height: 44px;
        font-size: 20px;
    }
}
.icon-btn:hover {
    transform: scale(1.08);
}
.icon-btn:active {
    transform: scale(0.9);
}

.error-text {
    color: var(--error-color);
    font-size: 13px;
    margin-top: 10px;
    text-align: left;
    font-weight: 600;
}
.error-text.hidden {
    display: none;
}

.custom-words-list-container {
    background: var(--card-bg);
    border: var(--card-border);
    border-radius: 24px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}
.custom-words-list-container h3 {
    font-size: 16px;
    color: var(--primary-color);
    margin-bottom: 15px;
}
.custom-words-list {
    max-height: 200px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding-right: 5px;
}
/* Стилизация скроллбара */
.custom-words-list::-webkit-scrollbar {
    width: 6px;
}
.custom-words-list::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
    border-radius: 10px;
}
.custom-words-list::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.15);
    border-radius: 10px;
}

.custom-word-item-wrapper {
    position: relative;
    width: 100%;
    border-radius: 12px;
    overflow: hidden;
}
.custom-word-slider {
    display: flex;
    width: 100%;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.custom-word-slider.swiping {
    transition: none;
}
.custom-word-delete-bg {
    flex: 0 0 150px;
    background: var(--error-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}
.custom-word-item {
    flex: 0 0 100%;
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--item-bg);
    border: 1px solid var(--input-border);
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-color);
}
.delete-word-btn {
    background: transparent;
    border: none;
    color: var(--error-color);
    font-size: 18px;
    cursor: pointer;
    font-weight: 800;
    padding: 2px 6px;
    border-radius: 6px;
    transition: background-color 0.2s;
    touch-action: manipulation;
}
.delete-word-btn:hover {
    background-color: rgba(245, 101, 101, 0.1);
}

/* Экран статистики */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 5px;
}
.stat-card {
    padding: 20px 10px !important;
    margin-bottom: 0 !important;
}
.stat-card h3 {
    font-size: 28px;
    font-weight: 800;
    color: #667eea;
    margin-bottom: 5px;
}
body[data-theme="dark"] .stat-card h3 {
    color: #9f7aea;
}
.stat-card p {
    font-size: 13px;
    color: var(--primary-color);
    font-weight: 600;
}
.stats-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.reset-stats-btn {
    background: transparent;
    border: none;
    color: var(--error-color);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    padding: 8px;
    transition: opacity 0.2s;
    touch-action: manipulation;
}
.reset-stats-btn:hover {
    opacity: 0.8;
}

/* Прогресс-бар спринта */
.progress-bar-wrapper {
    margin-top: 12px;
    width: 100%;
}

.progress-bar-track {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 100px;
    overflow: hidden;
    backdrop-filter: blur(4px);
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    border-radius: 100px;
    background: linear-gradient(90deg, #a78bfa, #60a5fa, #34d399);
    background-size: 200% 100%;
    transition: width 0.45s cubic-bezier(0.4, 0, 0.2, 1);
    animation: shimmer 2s linear infinite;
    box-shadow: 0 0 10px rgba(167, 139, 250, 0.6);
}

@keyframes shimmer {
    0%   { background-position: 200% center; }
    100% { background-position: -200% center; }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    50% { transform: translateX(5px); }
    75% { transform: translateX(-5px); }
}

@keyframes pop {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

/* Панель настроек спринта */
.sprint-config-wrapper {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.sprint-config-panel {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 16px;
    padding: 12px;
    backdrop-filter: blur(5px);
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    max-height: 500px;
    opacity: 1;
    overflow: hidden;
}
body[data-theme="dark"] .sprint-config-panel {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
}
.sprint-config-panel.collapsed {
    max-height: 0;
    opacity: 0;
    padding-top: 0;
    padding-bottom: 0;
    border-width: 0;
    margin-top: -10px;
    pointer-events: none;
}
.sprint-quick-btns {
    display: flex;
    gap: 8px;
    justify-content: space-between;
}
.sprint-quick-btn {
    flex: 1;
    background: var(--button-bg);
    color: var(--button-text);
    border: none;
    padding: 10px 5px;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    touch-action: manipulation;
}
.sprint-quick-btn:hover {
    transform: translateY(-2px);
    background: var(--btn-hover);
}
.sprint-custom-input {
    display: flex;
    gap: 8px;
}
#sprint-custom-val {
    flex: 1;
    padding: 10px;
    border-radius: 10px;
    border: 1px solid var(--input-border);
    background: var(--input-bg);
    color: var(--text-color);
    font-family: 'Inter', sans-serif;
}
.sprint-start-btn {
    background: var(--bg-gradient);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 10px;
    font-weight: 800;
    cursor: pointer;
    touch-action: manipulation;
}

/* Модальное окно */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    animation: fadeIn 0.2s ease;
}
.modal-overlay.hidden {
    display: none !important;
}
.modal-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: var(--card-border);
    border-radius: 20px;
    padding: 24px;
    width: 90%;
    max-width: 340px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    animation: scaleUp 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.modal-card h2 {
    margin-bottom: 12px;
    font-size: 1.5rem;
    color: var(--text-color);
}
.modal-card p {
    margin-bottom: 24px;
    color: var(--text-color);
    opacity: 0.9;
    font-size: 1.05rem;
    line-height: 1.4;
}
.modal-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
}
.modal-buttons .mode-btn {
    padding: 12px 16px;
    font-size: 1rem;
    flex: 1;
    margin: 0;
    font-weight: 700;
}
.modal-buttons .mode-btn.secondary {
    background: #edf2f7 !important;
    color: #1a202c !important;
    border: 1px solid #cbd5e0 !important;
}
.modal-buttons .mode-btn.secondary:hover {
    background: #e2e8f0 !important;
}
body[data-theme="dark"] .modal-buttons .mode-btn.secondary {
    background: rgba(255, 255, 255, 0.1) !important;
    color: #e2e8f0 !important;
    border: 1px solid rgba(255, 255, 255, 0.2) !important;
}
body[data-theme="dark"] .modal-buttons .mode-btn.secondary:hover {
    background: rgba(255, 255, 255, 0.16) !important;
}
.modal-buttons .mode-btn.danger {
    background: #e53e3e !important;
    color: #ffffff !important;
}
.modal-buttons .mode-btn.danger:hover {
    background: #c53030 !important;
}
@keyframes scaleUp {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

/* --- Survival Mode Dark Styles --- */
body.survival-mode-active,
body.survival-mode-active[data-theme] {
    --bg-gradient: linear-gradient(135deg, #2d0000 0%, #000000 100%);
    --card-bg: rgba(40, 0, 0, 0.85);
    --card-border: 1px solid rgba(255, 0, 0, 0.3);
    --text-color: #ffcccc;
    --primary-color: #ff3333;
    --button-bg: rgba(255, 0, 0, 0.1);
    --button-text: #ffcccc;
    --input-bg: rgba(255, 0, 0, 0.05);
    --input-border: rgba(255, 0, 0, 0.2);
    --item-bg: rgba(40, 0, 0, 0.7);
    --btn-hover: rgba(255, 0, 0, 0.2);
    background: var(--bg-gradient) !important;
}

body.survival-mode-active .app-container {
    background: transparent;
    border-color: rgba(255, 0, 0, 0.3);
}

body.survival-mode-active #current-word,
body.survival-mode-active .word-display {
    color: #ff3333;
    text-shadow: 0 0 15px rgba(255, 0, 0, 0.6);
}

body.survival-mode-active #mode-title,
body.survival-mode-active .mode-title {
    color: #ff4444;
}

body.survival-mode-active .option-btn {
    border-color: rgba(255, 0, 0, 0.4);
}

body.survival-mode-active .option-btn.correct-anim {
    background: rgba(0, 100, 0, 0.8) !important;
    border-color: #00ff00 !important;
}

body.survival-mode-active .option-btn.wrong-anim,
body.survival-mode-active .option-btn.error-anim {
    background: rgba(200, 0, 0, 0.9) !important;
    border-color: #ff0000 !important;
}

body.survival-mode-active .top-settings .icon-btn {
    background: rgba(255, 0, 0, 0.2);
    color: #ff8888;
}

body.survival-mode-active .hotkey-badge {
    background: rgba(255, 0, 0, 0.2) !important;
    color: #ffaaaa !important;
}

/* =========================================
   ЭКЗАМЕН (ЗАДАНИЕ 4 ЕГЭ)
   ========================================= */

.mode-btn.exam-btn {
    background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
    color: #ffffff;
    font-size: 19px;
    font-weight: 800;
    box-shadow: 0 4px 18px rgba(37, 117, 252, 0.35);
    border: none;
    margin-bottom: 12px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.mode-btn.exam-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(37, 117, 252, 0.45);
}

.exam-screen-header {
    text-align: center;
    margin-bottom: 15px;
}

.exam-screen-header h1 {
    font-size: 26px;
    margin-bottom: 6px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

.exam-stats-bar {
    display: flex;
    justify-content: center;
    margin-bottom: 10px;
}

.exam-badge-progress {
    background: rgba(255, 255, 255, 0.35);
    color: #ffffff;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 800;
    border: 1px solid rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(8px);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
    letter-spacing: 0.3px;
}

body[data-theme="dark"] .exam-badge-progress {
    background: rgba(255, 255, 255, 0.08);
    color: #e2e8f0;
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: none;
}

.exam-card {
    text-align: left;
    padding: 20px 15px;
    margin-bottom: 16px;
}

@media (min-width: 480px) {
    .exam-card {
        padding: 22px 18px;
        margin-bottom: 18px;
    }
}

.exam-header-subtitle {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    font-weight: 800;
    color: #2b6cb0;
    margin-bottom: 8px;
}

body[data-theme="dark"] .exam-header-subtitle {
    color: #63b3ed;
}

.exam-instruction {
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 16px;
    color: #1a202c;
    font-weight: 600;
}

body[data-theme="dark"] .exam-instruction {
    color: #e2e8f0;
}

.highlight-condition {
    padding: 3px 8px;
    border-radius: 6px;
    font-weight: 800;
    display: inline-block;
    letter-spacing: 0.5px;
}

.highlight-condition.highlight-correct {
    background: rgba(46, 213, 115, 0.2);
    color: #0f8a44;
}

.highlight-condition.highlight-wrong {
    background: rgba(255, 71, 87, 0.2);
    color: #c53030;
}

body[data-theme="dark"] .highlight-condition.highlight-correct {
    background: rgba(46, 213, 115, 0.18);
    color: #2ed573;
}

body[data-theme="dark"] .highlight-condition.highlight-wrong {
    background: rgba(255, 71, 87, 0.18);
    color: #ff4757;
}

.exam-rows-container {
    display: flex;
    flex-direction: column;
    gap: 9px;
}

.exam-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    border-radius: 14px;
    background: #ffffff;
    border: 2px solid #e2e8f0;
    cursor: pointer;
    touch-action: manipulation;
    user-select: none;
    -webkit-user-select: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.03);
}

.exam-row:hover {
    background: #ffffff;
    border-color: #cbd5e0;
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.07);
}

body[data-theme="dark"] .exam-row {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow: none;
}

body[data-theme="dark"] .exam-row:hover {
    background: rgba(255, 255, 255, 0.09);
    border-color: rgba(255, 255, 255, 0.15);
}

.exam-row-main {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
    min-width: 0;
}

.exam-row-num {
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: #edf2f7;
    font-size: 13px;
    font-weight: 800;
    color: #2d3748;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

body[data-theme="dark"] .exam-row-num {
    background: rgba(255, 255, 255, 0.12);
    color: #e2e8f0;
}

.exam-row-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 3px;
    min-width: 0;
    flex: 1;
}

.exam-row-word {
    font-size: 16px;
    font-weight: 700;
    color: #1a202c;
    letter-spacing: 0.3px;
    line-height: 1.25;
    word-break: break-word;
}

@media (min-width: 400px) {
    .exam-row-word {
        font-size: 17px;
    }
}

body[data-theme="dark"] .exam-row-word {
    color: #e2e8f0;
}

.exam-row-checkbox {
    width: 24px;
    height: 24px;
    border-radius: 7px;
    border: 2px solid #a0aec0;
    background: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
    margin-left: 10px;
}

body[data-theme="dark"] .exam-row-checkbox {
    border-color: rgba(255, 255, 255, 0.3);
    background: transparent;
}

/* Выбранная строка (до ответа) */
.exam-row.selected {
    border-color: #2575fc !important;
    background: #edf2f7 !important;
}

body[data-theme="dark"] .exam-row.selected {
    border-color: #4facfe !important;
    background: rgba(79, 172, 254, 0.18) !important;
}

.exam-row.selected .exam-row-num {
    background: #2575fc;
    color: #ffffff;
}

body[data-theme="dark"] .exam-row.selected .exam-row-num {
    background: #4facfe;
    color: #1e1346;
}

.exam-row.selected .exam-row-checkbox {
    background: #2575fc;
    border-color: #2575fc;
}

body[data-theme="dark"] .exam-row.selected .exam-row-checkbox {
    background: #4facfe;
    border-color: #4facfe;
}

.exam-row.selected .exam-row-checkbox::after {
    content: '✓';
    color: #ffffff;
    font-size: 14px;
    font-weight: 900;
}

body[data-theme="dark"] .exam-row.selected .exam-row-checkbox::after {
    color: #1e1346;
}

/* Состояния после ответа */
.exam-row.answered {
    cursor: default;
    pointer-events: none;
}

.exam-row-badge {
    display: none;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 6px;
    line-height: 1.3;
    letter-spacing: 0.2px;
}

.exam-row.answered .exam-row-badge {
    display: inline-flex;
    align-items: center;
    margin-top: 2px;
}

.exam-row-badge.badge-correct {
    background: rgba(46, 213, 115, 0.2);
    color: #0f8a44;
}

body[data-theme="dark"] .exam-row-badge.badge-correct {
    background: rgba(46, 213, 115, 0.18);
    color: #2ed573;
}

.exam-row-badge.badge-wrong {
    background: rgba(255, 71, 87, 0.2);
    color: #c53030;
}

body[data-theme="dark"] .exam-row-badge.badge-wrong {
    background: rgba(255, 71, 87, 0.18);
    color: #ff6b81;
}

.exam-row.user-correct {
    border-color: #2ed573 !important;
    background: rgba(46, 213, 115, 0.12) !important;
}

.exam-row.user-wrong {
    border-color: #ff4757 !important;
    background: rgba(255, 71, 87, 0.12) !important;
}

.exam-row.missed-target {
    border: 2px dashed #2ed573 !important;
    background: rgba(46, 213, 115, 0.05) !important;
}

/* Блок фидбека */
.exam-feedback-box {
    margin-top: 14px;
    padding: 12px 14px;
    border-radius: 12px;
    font-size: 13px;
    text-align: center;
    line-height: 1.4;
}

.exam-feedback-box.feedback-success {
    background: rgba(46, 213, 115, 0.18);
    color: #0f8a44;
    border: 1px solid rgba(46, 213, 115, 0.4);
}

body[data-theme="dark"] .exam-feedback-box.feedback-success {
    background: rgba(46, 213, 115, 0.15);
    color: #2ed573;
    border-color: rgba(46, 213, 115, 0.3);
}

.exam-feedback-box.feedback-error {
    background: rgba(255, 71, 87, 0.18);
    color: #c53030;
    border: 1px solid rgba(255, 71, 87, 0.4);
}

body[data-theme="dark"] .exam-feedback-box.feedback-error {
    background: rgba(255, 71, 87, 0.15);
    color: #ff4757;
    border-color: rgba(255, 71, 87, 0.3);
}

.exam-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.exam-submit-btn {
    background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(37, 117, 252, 0.3);
}

.exam-next-btn {
    background: var(--success-color);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(46, 213, 115, 0.3);
}

/* Уведомление о фоновом обновлении */
.pwa-update-toast {
    position: fixed;
    bottom: max(20px, env(safe-area-inset-bottom));
    left: 50%;
    transform: translateX(-50%);
    background: rgba(26, 22, 38, 0.94);
    border: 1px solid rgba(79, 172, 254, 0.45);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    color: #ffffff;
    padding: 10px 18px;
    border-radius: 30px;
    font-size: 13px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 10000;
    animation: slideUpFade 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.pwa-update-btn {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    border: none;
    color: #1e1346;
    font-weight: 800;
    font-size: 12px;
    padding: 6px 14px;
    border-radius: 20px;
    cursor: pointer;
    touch-action: manipulation;
    transition: transform 0.2s ease;
}

.pwa-update-btn:active {
    transform: scale(0.94);
}

@keyframes slideUpFade {
    from {
        opacity: 0;
        transform: translate(-50%, 20px);
    }
    to {
        opacity: 1;
        transform: translate(-50%, 0);
    }
}