:root {
    --tg-theme-bg-color: #1a1a2e;
    --tg-theme-text-color: #ffffff;
    --tg-theme-button-color: #0f4c75;
    --tg-theme-button-text-color: #ffffff;
    --primary: #00d4ff;
    --secondary: #7b2cbf;
    --success: #4cc9f0;
    --warning: #f72585;
    --card-bg: #16213e;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* Звёздный фон */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(2px 2px at 20px 30px, #fff, rgba(0,0,0,0)),
                radial-gradient(1px 1px at 40px 70px, #fff, rgba(0,0,0,0));
    background-size: 200px 200px, 150px 150px;
    background-repeat: repeat;
    opacity: 0.15;
    pointer-events: none;
    z-index: -1;
    animation: starsMove 60s linear infinite;
}

@keyframes starsMove {
    from { background-position: 0 0; }
    to { background-position: 200px 200px; }
}

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

@keyframes fadeOut {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(-10px); }
}

@keyframes glow {
    0% { box-shadow: 0 0 5px rgba(0,212,255,0.2); }
    50% { box-shadow: 0 0 20px rgba(0,212,255,0.5); }
    100% { box-shadow: 0 0 5px rgba(0,212,255,0.2); }
}

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

.main > div {
    animation: fadeIn 0.3s ease-out;
}

.header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    padding: 20px;
    border-radius: 0 0 30px 30px;
    margin-bottom: 20px;
}

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

.title {
    font-size: 24px;
    font-weight: bold;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.energy-display {
    background: rgba(255,255,255,0.2);
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: bold;
    backdrop-filter: blur(10px);
}

.main {
    padding: 20px;
}

.hidden {
    display: none !important;
}

.loading-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 300px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255,255,255,0.1);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 20px;
}

.profile-card {
    background: rgba(22,33,62,0.85);
    backdrop-filter: blur(2px);
    border-radius: 20px;
    padding: 20px;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
    transition: transform 0.2s, box-shadow 0.3s;
}

.profile-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
    animation: glow 1.5s infinite;
}

.avatar {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    position: relative;
    overflow: hidden;
}

.avatar::after {
    content: '👤';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 30px;
}

.menu-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.menu-item {
    background: var(--card-bg);
    border: none;
    border-radius: 15px;
    padding: 20px;
    color: white;
    font-size: 18px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
    overflow: hidden;
}

.menu-item:active {
    transform: scale(0.96);
}

.menu-item::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s;
}

.menu-item:active::after {
    width: 200px;
    height: 200px;
}

.menu-item .emoji {
    font-size: 32px;
}

.onboarding {
    text-align: center;
}

.test-question {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 20px;
    margin: 20px 0;
}

.test-options {
    display: grid;
    gap: 10px;
    margin-top: 20px;
}

.test-option {
    background: rgba(255,255,255,0.1);
    border: 2px solid transparent;
    border-radius: 12px;
    padding: 15px;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s;
}

.test-option:hover {
    background: rgba(255,255,255,0.2);
}

.test-option.selected {
    border-color: var(--primary);
    background: rgba(0,212,255,0.1);
}

.age-buttons, .subjects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin: 20px 0;
}

.age-buttons button, .subject-btn {
    background: var(--card-bg);
    border: none;
    border-radius: 12px;
    padding: 15px;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s;
}

.age-buttons button.selected, .subject-btn.selected {
    background: var(--primary);
    color: var(--tg-theme-bg-color);
    font-weight: bold;
    transform: scale(0.97);
    box-shadow: 0 0 15px var(--primary);
}

.primary-btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    border-radius: 25px;
    padding: 15px 30px;
    color: white;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    width: 100%;
    margin-top: 20px;
    transition: all 0.2s;
    position: relative;
    overflow: hidden;
}

.primary-btn:active {
    transform: scale(0.96);
}

.primary-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s;
}

.primary-btn:active::after {
    width: 200px;
    height: 200px;
}

.age-selector select {
    width: 100%;
    padding: 15px 20px;
    background: var(--card-bg);
    color: white;
    border: 2px solid rgba(255,255,255,0.1);
    border-radius: 15px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><polyline points='6 9 12 15 18 9'/></svg>");
    background-repeat: no-repeat;
    background-position: right 15px center;
    background-size: 20px;
    transition: border 0.3s ease;
}

.age-selector select:hover {
    border-color: var(--primary);
}

.age-selector select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0,212,255,0.2);
}

.age-selector select option {
    background: var(--card-bg);
    color: white;
    padding: 15px;
    font-size: 16px;
}

.test-option-btn {
    transition: all 0.2s ease;
    background: rgba(255,255,255,0.1);
    border: 2px solid transparent;
    border-radius: 10px;
    padding: 12px;
    color: white;
    font-size: 16px;
    cursor: pointer;
}

.test-option-btn.selected {
    background: var(--primary) !important;
    border-color: var(--secondary) !important;
    color: white;
    transform: scale(0.98);
    box-shadow: 0 0 10px rgba(0,212,255,0.5);
}

.mission-screen {
    text-align: center;
}

.question-card {
    background: rgba(22,33,62,0.85);
    backdrop-filter: blur(2px);
    border-radius: 20px;
    padding: 25px;
    margin: 20px 0;
    animation: fadeIn 0.3s ease;
    transition: transform 0.2s, box-shadow 0.3s;
}

.question-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
    animation: glow 1.5s infinite;
}

.question-text {
    font-size: 20px;
    margin-bottom: 25px;
    line-height: 1.5;
    color: white;
}

.options-grid {
    display: grid;
    gap: 12px;
}

.option-btn {
    background: rgba(255,255,255,0.1);
    border: 2px solid transparent;
    border-radius: 12px;
    padding: 15px;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
    position: relative;
    overflow: hidden;
}

.option-btn:hover {
    background: rgba(255,255,255,0.15);
}

.option-btn.correct {
    background: #4caf50;
    border-color: #fff;
}

.option-btn.incorrect {
    background: #f44336;
    border-color: #fff;
}

.option-btn:active {
    transform: scale(0.98);
}

.explanation {
    margin-top: 20px;
    padding: 15px;
    background: rgba(255,255,255,0.05);
    border-radius: 10px;
    font-style: italic;
    color: rgba(255,255,255,0.9);
}

.mission-progress {
    height: 6px;
    background: rgba(255,255,255,0.1);
    border-radius: 3px;
    margin: 20px 0;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 10px var(--primary);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin: 20px 0;
}

.card-item {
    background: rgba(22,33,62,0.85);
    backdrop-filter: blur(2px);
    border-radius: 15px;
    padding: 15px;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.3s;
}

.card-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
    animation: glow 1.5s infinite;
}

.card-item.legendary {
    background: linear-gradient(135deg, #ffd700, #ffa500);
    color: #1a1a2e;
}

.card-item.epic {
    background: linear-gradient(135deg, #9b59b6, #8e44ad);
}

.card-item.rare {
    background: linear-gradient(135deg, #3498db, #2980b9);
}

.card-item.common {
    background: linear-gradient(135deg, #95a5a6, #7f8c8d);
}

.card-rarity {
    position: absolute;
    top: 5px;
    right: 5px;
    font-size: 20px;
}

.rating-list {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 15px;
    margin: 20px 0;
}

.rating-item {
    display: flex;
    align-items: center;
    padding: 12px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.rating-item:last-child {
    border-bottom: none;
}

.rating-position {
    width: 30px;
    font-weight: bold;
    font-size: 18px;
}

.rating-name {
    flex: 1;
}

.rating-score {
    font-weight: bold;
    color: var(--primary);
}

.back-btn {
    background: rgba(255,255,255,0.1);
    border: none;
    border-radius: 12px;
    padding: 12px 24px;
    color: white;
    font-size: 16px;
    cursor: pointer;
    width: 100%;
    margin-top: 20px;
    transition: all 0.2s;
    position: relative;
    overflow: hidden;
}

.back-btn:active {
    transform: scale(0.96);
}

.back-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s;
}

.back-btn:active::after {
    width: 200px;
    height: 200px;
}

.back-btn:hover {
    background: rgba(255,255,255,0.15);
}

.learning-screen, .topic-lessons-screen, .lesson-screen {
    padding: 20px;
}

.topics-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin: 20px 0;
}

.topic-card {
    background: rgba(22,33,62,0.85);
    backdrop-filter: blur(2px);
    border-radius: 15px;
    padding: 20px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.3s;
}

.topic-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
    animation: glow 1.5s infinite;
}

.topic-card h3 {
    color: var(--primary);
    margin-bottom: 10px;
}

.topic-progress {
    margin: 10px 0;
    font-size: 14px;
    color: rgba(255,255,255,0.7);
}

.lessons-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 20px 0;
}

.lesson-item {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 15px;
    display: flex;
    align-items: center;
    gap: 15px;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s;
}

.lesson-item:hover {
    transform: translateX(8px);
    background: rgba(0,212,255,0.1);
}

.lesson-item.locked {
    opacity: 0.5;
    cursor: not-allowed;
}

.lesson-status {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.lesson-status.completed {
    background: #4caf50;
}

.lesson-status.available {
    background: var(--primary);
}

.lesson-status.locked {
    background: #666;
}

.lesson-info {
    flex: 1;
}

.lesson-info h4 {
    margin-bottom: 5px;
    color: white;
}

.lesson-score {
    font-size: 14px;
    color: var(--primary);
}

.lesson-content {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 20px;
    margin: 20px 0;
    line-height: 1.6;
    color: white;
}

.lesson-content p, .lesson-content h1, .lesson-content h2, .lesson-content h3, .lesson-content ul, .lesson-content li {
    color: white;
}

.lesson-questions {
    margin: 20px 0;
}

.question-block {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 15px;
}

.question-text {
    font-size: 18px;
    margin-bottom: 15px;
    color: white;
}

.question-options {
    display: grid;
    gap: 10px;
}

.question-option {
    background: rgba(255,255,255,0.1);
    border: 2px solid transparent;
    border-radius: 10px;
    padding: 12px;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
}

.question-option:hover {
    background: rgba(255,255,255,0.15);
}

.question-option.selected {
    border-color: var(--primary);
    background: rgba(0,212,255,0.1);
}

.question-option.correct {
    background: #4caf50;
    border-color: #fff;
}

.question-option.incorrect {
    background: #f44336;
    border-color: #fff;
}

.question-explanation {
    margin-top: 15px;
    padding: 15px;
    background: rgba(255,255,255,0.05);
    border-radius: 10px;
    font-style: italic;
    color: rgba(255,255,255,0.9);
}

.lesson-progress {
    height: 6px;
    background: rgba(255,255,255,0.1);
    border-radius: 3px;
    margin: 20px 0;
    overflow: hidden;
}

.lesson-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 10px var(--primary);
}

.lesson-result {
    text-align: center;
    padding: 30px;
}

.lesson-result h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: white;
}

.lesson-result .energy-reward {
    font-size: 20px;
    color: var(--primary);
    margin: 15px 0;
}

.interests-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin: 20px 0;
}

.interest-btn {
    background: var(--card-bg);
    border: 2px solid transparent;
    border-radius: 12px;
    padding: 12px;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s;
}

.interest-btn:hover {
    background: rgba(255,255,255,0.15);
}

.interest-btn.selected {
    background: var(--primary);
    border-color: var(--secondary);
    transform: scale(0.98);
    box-shadow: 0 0 15px var(--primary);
}

.interests-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 10px 0;
}

.interest-tag {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 14px;
    color: white;
}

.custom-interest {
    display: flex;
    gap: 10px;
    margin: 20px 0;
}

.custom-interest input {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: 12px;
    background: var(--card-bg);
    color: white;
    font-size: 16px;
}

.custom-interest input::placeholder {
    color: rgba(255,255,255,0.5);
}

.secondary-btn {
    background: var(--card-bg);
    border: 2px solid var(--primary);
    border-radius: 12px;
    padding: 12px 20px;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    overflow: hidden;
}

.secondary-btn:active {
    transform: scale(0.96);
}

.secondary-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(0,212,255,0.3);
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s;
}

.secondary-btn:active::after {
    width: 200px;
    height: 200px;
}

.secondary-btn:hover {
    background: rgba(0,212,255,0.1);
}

.daily-goal-selector {
    text-align: center;
    padding: 20px;
}

.daily-goal {
    margin: 30px 0;
    text-align: center;
}

.daily-goal input[type="range"] {
    width: 100%;
    height: 8px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 4px;
    -webkit-appearance: none;
}

.daily-goal input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    background: white;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

#goalDisplay {
    display: block;
    margin-top: 12px;
    font-size: 20px;
    font-weight: bold;
    color: var(--primary);
}

.profile-screen {
    padding: 20px;
}

.profile-details {
    background: rgba(22,33,62,0.85);
    backdrop-filter: blur(2px);
    border-radius: 20px;
    padding: 20px;
    margin: 20px 0;
}

.profile-section {
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.profile-section:last-child {
    border-bottom: none;
}

.profile-section h3 {
    color: var(--primary);
    margin-bottom: 10px;
    font-size: 18px;
}

.profile-section p {
    font-size: 16px;
    line-height: 1.5;
    color: rgba(255,255,255,0.9);
}

#profileUserId {
    font-weight: bold;
    color: var(--primary);
}

.edit-interests-screen {
    padding: 20px;
}

.parents-screen, .friends-screen {
    padding: 20px;
    text-align: center;
}

.parent-controls, .friends-section {
    margin-bottom: 30px;
    padding: 15px;
    background: rgba(22,33,62,0.85);
    backdrop-filter: blur(2px);
    border-radius: 15px;
    text-align: left;
}

.parent-controls input, .friends-section input {
    width: 100%;
    max-width: 300px;
    padding: 10px;
    margin-right: 10px;
    border-radius: 8px;
    border: none;
    background: rgba(255,255,255,0.1);
    color: white;
}

.child-card, .friend-card, .friend-request, .project-card, .invite-card {
    background: rgba(255,255,255,0.05);
    border-radius: 12px;
    padding: 12px;
    margin: 10px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.child-card button, .friend-card button, .friend-request button, .project-card button, .invite-card button {
    background: var(--primary);
    border: none;
    border-radius: 8px;
    padding: 6px 12px;
    color: black;
    font-weight: bold;
    cursor: pointer;
    transition: 0.2s;
}

.child-card button:hover, .friend-card button:hover, .friend-request button:hover, .project-card button:hover, .invite-card button:hover {
    background: var(--secondary);
    color: white;
}

.invite-card {
    background: rgba(255,255,255,0.1);
    border-left: 4px solid var(--primary);
}
/* ===== ДОПОЛНИТЕЛЬНЫЕ СОВРЕМЕННЫЕ ЭФФЕКТЫ (не ломают вёрстку) ===== */

/* Плавные переходы для всех карточек и кнопок */
.profile-card, .menu-item, .topic-card, .card-item, .lesson-item, .primary-btn, .back-btn, .option-btn, .test-option {
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s;
}

/* Эффект при наведении на карточки */
.profile-card:hover, .menu-item:hover, .topic-card:hover, .card-item:hover, .lesson-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 25px rgba(0,212,255,0.3);
}

/* Кнопки: ripple-эффект (волна при клике) */
.primary-btn, .back-btn, .secondary-btn, .option-btn {
    position: relative;
    overflow: hidden;
}
.primary-btn::after, .back-btn::after, .secondary-btn::after, .option-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s;
}
.primary-btn:active::after, .back-btn:active::after, .secondary-btn:active::after, .option-btn:active::after {
    width: 200px;
    height: 200px;
}

/* Анимация появления экранов (плавнее) */
.main > div:not(.hidden) {
    animation: fadeInScale 0.25s ease-out;
}
@keyframes fadeInScale {
    from { opacity: 0; transform: scale(0.98); }
    to { opacity: 1; transform: scale(1); }
}

/* Энергия пульсирует */
.energy-display {
    animation: energyGlow 2s infinite;
}
@keyframes energyGlow {
    0% { box-shadow: 0 0 2px #00d4ff; }
    50% { box-shadow: 0 0 12px #00d4ff; }
    100% { box-shadow: 0 0 2px #00d4ff; }
}

/* Красивый скроллбар */
::-webkit-scrollbar {
    width: 4px;
}
::-webkit-scrollbar-track {
    background: rgba(255,255,255,0.05);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb {
    background: #00d4ff;
    border-radius: 10px;
}

/* Улучшенный фон: добавляем больше звёзд (без изменения структуры) */
body::before {
    opacity: 0.2; /* делаем звёзды чуть ярче */
    animation-duration: 40s; /* ускоряем движение */
}

/* Стеклянный эффект для карточек (лёгкое размытие, но без потери читаемости) */
.profile-card, .menu-item, .topic-card, .card-item, .lesson-item, .question-card, .rating-list {
    backdrop-filter: blur(4px);
    background: rgba(22,33,62,0.85);
}

/* Плавное появление вопросов */
.question-card {
    animation: fadeInUp 0.3s;
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Акцент на правильные/неправильные ответы */
.option-btn.correct {
    box-shadow: 0 0 10px #4caf50;
}
.option-btn.incorrect {
    box-shadow: 0 0 10px #f44336;
}

/* Затемнение фона для модальных окон (если появятся) — задел на будущее */
.modal-overlay {
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(8px);
}
/* Анимированные звёзды */
.stars-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}
.star {
    position: absolute;
    background-color: #fff;
    border-radius: 50%;
    opacity: 0;
    animation: starFloat 4s infinite alternate ease-in-out;
}
@keyframes starFloat {
    0% { opacity: 0; transform: translateY(0) scale(0.6); }
    100% { opacity: 0.8; transform: translateY(-20px) scale(1.2); }
}
/* Тосты */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(0,0,0,0.85);
    backdrop-filter: blur(16px);
    color: white;
    padding: 12px 24px;
    border-radius: 60px;
    font-weight: 500;
    font-size: 14px;
    z-index: 10000;
    border-left: 4px solid var(--primary);
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
    transition: transform 0.3s ease;
    pointer-events: none;
}
.toast.show {
    transform: translateX(-50%) translateY(0);
}
.toast-success { border-left-color: #10b981; }
.toast-error { border-left-color: #ef4444; }
.toast-warning { border-left-color: #f59e0b; }

/* ========== КРАСИВЫЙ ДИЗАЙН ВХОДНОГО ТЕСТА ========== */

/* Контейнер онбординга */
.onboarding {
    max-width: 500px;
    margin: 0 auto;
    padding: 20px;
    background: rgba(22, 33, 62, 0.6);
    backdrop-filter: blur(12px);
    border-radius: 48px;
    border: 1px solid rgba(0, 212, 255, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.onboarding h2 {
    font-size: 28px;
    text-align: center;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #fff, var(--primary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.onboarding h3 {
    font-size: 22px;
    margin: 25px 0 15px;
    color: var(--primary);
    text-align: center;
}

/* Вопросы теста */
.test-question {
    background: rgba(10, 20, 40, 0.7);
    border-radius: 32px;
    padding: 24px;
    margin: 20px 0;
    border: 1px solid rgba(0, 212, 255, 0.2);
    transition: all 0.3s;
}

.test-question .question-text {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 25px;
    text-align: center;
    line-height: 1.4;
}

/* Варианты ответов (стильные кнопки) */
.test-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.test-option {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 60px;
    padding: 14px 20px;
    font-size: 1rem;
    font-weight: 500;
    text-align: left;
    transition: all 0.2s;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
}

.test-option:hover {
    background: rgba(0, 212, 255, 0.15);
    transform: translateX(6px);
    border-color: var(--primary);
}

.test-option.selected {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-color: white;
    color: white;
    box-shadow: 0 0 15px var(--primary);
}

/* Селектор возраста (красивый выпадающий список) */
.age-selector {
    margin: 20px 0;
}

.age-selector select {
    background: rgba(10, 20, 40, 0.9);
    border: 2px solid rgba(0, 212, 255, 0.5);
    border-radius: 60px;
    padding: 16px 24px;
    font-size: 1.1rem;
    font-weight: 500;
    color: white;
    cursor: pointer;
    transition: all 0.2s;
    backdrop-filter: blur(8px);
}

.age-selector select:hover {
    border-color: var(--primary);
    box-shadow: 0 0 12px rgba(0, 212, 255, 0.4);
}

.age-selector select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.3);
}

/* Сетка выбора предметов */
.subjects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin: 20px 0;
}

.subject-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 60px;
    padding: 14px 12px;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.2s;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.subject-btn:hover {
    background: rgba(0, 212, 255, 0.15);
    transform: scale(0.98);
}

.subject-btn.selected {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-color: white;
    color: white;
    box-shadow: 0 0 12px var(--primary);
}

/* Сетка интересов */
.interests-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin: 20px 0;
}

.interest-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 60px;
    padding: 12px 12px;
    font-size: 0.95rem;
    transition: all 0.2s;
    cursor: pointer;
}

.interest-btn:hover {
    background: rgba(0, 212, 255, 0.15);
    transform: scale(0.98);
}

.interest-btn.selected {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-color: white;
    color: white;
    box-shadow: 0 0 10px var(--primary);
}

/* Поле для своего варианта интереса */
.custom-interest {
    display: flex;
    gap: 12px;
    margin: 20px 0;
}

.custom-interest input {
    flex: 1;
    background: rgba(10, 20, 40, 0.9);
    border: 1px solid rgba(0, 212, 255, 0.4);
    border-radius: 60px;
    padding: 12px 18px;
    color: white;
    font-size: 0.95rem;
}

.custom-interest input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.3);
}

/* Слайдер дневной цели */
.daily-goal {
    margin: 30px 0;
    text-align: center;
}

.daily-goal input[type="range"] {
    width: 100%;
    height: 6px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 10px;
    -webkit-appearance: none;
}

.daily-goal input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    background: white;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 12px var(--primary);
    border: 2px solid var(--primary);
}

#goalDisplay {
    display: inline-block;
    margin-top: 15px;
    font-size: 24px;
    font-weight: bold;
    background: linear-gradient(135deg, var(--primary), white);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* Кнопка "Далее" / "Продолжить" */
.primary-btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    border-radius: 60px;
    padding: 16px 28px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    width: 100%;
    margin-top: 25px;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.primary-btn:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.5);
}

/* Прогресс-бар теста (если есть) */
.test-progress {
    height: 4px;
    background: rgba(255,255,255,0.1);
    border-radius: 2px;
    margin: 20px 0;
    overflow: hidden;
}
.test-progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: width 0.3s ease;
}

/* Анимация появления вопросов */
.test-question {
    animation: fadeInUp 0.4s ease-out;
}

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