/* ==========================================
   БАЗОВЫЕ СБРОСЫ И ПЕРЕМЕННЫЕ
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0b0c10;
    --bg-secondary: #13151a;
    --accent-purple: #9d4edd;
    --accent-pink: #c77dff;
    --accent-cyan: #00f5d4;
    --accent-yellow: #ffd700;
    --text-primary: #ffffff;
    --text-secondary: #b0b0c0;
    --glass-bg: rgba(25, 25, 35, 0.55);
    --glass-border: rgba(157, 78, 221, 0.25);
    --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --success: #2ecc71;
    --error: #e74c3c;
    --warning: #f39c12;
}

body {
    font-family: 'Montserrat', sans-serif;
    background: radial-gradient(circle at 20% 20%, #1a0b2e, #0b0c10 80%);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 20px;
    line-height: 1.6;
    display: flex;
    justify-content: center;
}

.container {
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
}

/* ==========================================
   СТЕКЛЯННЫЙ ЭФФЕКТ
   ========================================== */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

/* ==========================================
   ШАПКА
   ========================================== */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding: 15px 25px;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.logo {
    font-size: 2rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: transform 0.3s ease;
    text-decoration: none;
    color: var(--text-primary);
}

.logo:hover {
    transform: scale(1.05);
}

.logo:active {
    transform: scale(0.98);
}

.logo-icon {
    font-size: 2.2rem;
    filter: drop-shadow(0 0 10px var(--accent-purple));
    transition: filter 0.3s ease;
}

.logo:hover .logo-icon {
    filter: drop-shadow(0 0 20px var(--accent-purple));
}

.logo-highlight {
    color: var(--accent-purple);
    text-shadow: 0 0 15px var(--accent-purple);
}

.tagline {
    font-size: 0.9rem;
    color: var(--text-secondary);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-top: 5px;
    text-align: center;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-email {
    color: var(--accent-cyan);
    font-size: 0.9rem;
    font-weight: 500;
}

.btn-logout {
    background: rgba(231, 76, 60, 0.2);
    border: 1px solid var(--error);
    color: var(--error);
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-family: 'Montserrat', sans-serif;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.3s;
}

.btn-logout:hover {
    background: rgba(231, 76, 60, 0.4);
}

/* ==========================================
   КАРТОЧКИ
   ========================================== */
.card {
    padding: 30px;
    margin-bottom: 25px;
}

.card:hover {
    transform: translateY(-2px);
    border-color: rgba(157, 78, 221, 0.5);
}

/* ==========================================
   HERO СЕКЦИЯ
   ========================================== */
.hero {
    text-align: center;
}

.hero h1 {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 15px;
}

.accent-text {
    color: var(--accent-cyan);
    text-shadow: 0 0 20px var(--accent-cyan);
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 25px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ==========================================
   КНОПКИ
   ========================================== */
.btn-primary {
    background: linear-gradient(135deg, var(--accent-purple), #5a189a);
    border: none;
    color: white;
    padding: 16px 36px;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: 0 0 25px rgba(157, 78, 221, 0.6);
    transition: all 0.3s ease;
    letter-spacing: 0.5px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-family: 'Montserrat', sans-serif;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 40px rgba(157, 78, 221, 0.9);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-secondary {
    background: transparent;
    border: 2px solid var(--accent-pink);
    color: var(--accent-pink);
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 700;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: 'Montserrat', sans-serif;
}

.btn-secondary:hover {
    background: var(--accent-pink);
    color: #0b0c10;
    box-shadow: 0 0 25px var(--accent-pink);
}

.small-note {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 12px;
}

.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(157, 78, 221, 0.7); }
    70% { box-shadow: 0 0 0 20px rgba(157, 78, 221, 0); }
    100% { box-shadow: 0 0 0 0 rgba(157, 78, 221, 0); }
}

/* ==========================================
   ФИЧИ
   ========================================== */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

.feature-item {
    text-align: center;
    padding: 30px 20px;
}

.feature-item .icon {
    font-size: 2.8rem;
    margin-bottom: 15px;
}

.feature-item h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--accent-pink);
}

.feature-item p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* ==========================================
   СЕТКА ПРЕДМЕТОВ
   ========================================== */
.section-title {
    text-align: center;
    font-size: 2rem;
    margin: 20px 0 25px;
    font-weight: 700;
}

.subject-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-bottom: 30px;
}

.subject-card {
    padding: 20px 10px;
    text-align: center;
    cursor: pointer;
    transition: all 0.25s;
    display: flex;
    flex-direction: column;
    align-items: center;
    user-select: none;
}

.subject-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-cyan);
    box-shadow: 0 15px 30px rgba(0, 245, 212, 0.25);
}

.subject-card.selected {
    border-color: var(--accent-cyan) !important;
    box-shadow: 0 0 30px rgba(0, 245, 212, 0.5) !important;
}

.emoji {
    font-size: 2.5rem;
    margin-bottom: 8px;
}

.name {
    font-weight: 600;
    font-size: 0.9rem;
}

.badge {
    margin-top: 8px;
    background: rgba(0, 245, 212, 0.15);
    color: var(--accent-cyan);
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.8rem;
}

/* ==========================================
   ПРОГРЕСС-БАР
   ========================================== */
.progress-section {
    padding: 20px 30px;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.progress-bar {
    width: 100%;
    height: 10px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan));
    border-radius: 10px;
    transition: width 0.5s ease;
}

/* ==========================================
   КАРТОЧКА ЗАДАНИЯ
   ========================================== */
.task-card {
    position: relative;
}

.task-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--glass-border);
}

.task-number {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--accent-purple);
}

.task-type {
    background: rgba(0, 245, 212, 0.15);
    color: var(--accent-cyan);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
}

.task-question {
    font-size: 1.15rem;
    margin-bottom: 20px;
    line-height: 1.7;
    white-space: pre-wrap;
}

.task-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
}

.option-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 15px 20px;
    border-radius: 12px;
    text-align: left;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'Montserrat', sans-serif;
    font-size: 1rem;
}

.option-btn:hover {
    background: rgba(157, 78, 221, 0.15);
    border-color: var(--accent-purple);
}

.option-btn.selected {
    background: rgba(157, 78, 221, 0.25);
    border-color: var(--accent-purple);
    box-shadow: 0 0 15px rgba(157, 78, 221, 0.3);
}

.option-btn.correct {
    background: rgba(46, 204, 113, 0.3);
    border-color: var(--success);
    color: var(--success);
}

.option-btn.wrong {
    background: rgba(231, 76, 60, 0.3);
    border-color: var(--error);
    color: var(--error);
}

.answer-field {
    width: 100%;
    padding: 15px;
    background: rgba(10, 10, 15, 0.7);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: white;
    font-family: 'Montserrat', sans-serif;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s;
}

.answer-field:focus {
    border-color: var(--accent-purple);
    box-shadow: 0 0 15px rgba(157, 78, 221, 0.4);
}

.task-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 20px;
    flex-wrap: wrap;
}

.feedback-message {
    text-align: center;
    margin-top: 15px;
    padding: 10px;
    border-radius: 10px;
    font-weight: 600;
    min-height: 40px;
    transition: all 0.3s;
}

.feedback-message.success {
    background: rgba(46, 204, 113, 0.2);
    color: var(--success);
}

.feedback-message.error {
    background: rgba(231, 76, 60, 0.2);
    color: var(--error);
}

/* ==========================================
   БЛОК ПОДПИСКИ
   ========================================== */
.subscription-block {
    text-align: center;
    padding: 40px 30px;
}

.lock-icon {
    font-size: 4rem;
    margin-bottom: 15px;
    animation: bounce 1s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.subscription-block h2 {
    font-size: 2rem;
    margin-bottom: 10px;
    color: var(--accent-pink);
}

.subscription-text {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.subscription-benefits {
    text-align: left;
    margin: 20px auto;
    max-width: 400px;
}

.benefit-item {
    padding: 8px 0;
    font-size: 0.95rem;
}

.price-block {
    margin: 25px 0;
}

.price {
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent-cyan);
}

.price-period {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* ==========================================
   БЛОК РЕЗУЛЬТАТОВ
   ========================================== */
.results-block {
    text-align: center;
}

.results-block h2 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.final-score {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-cyan);
    margin: 15px 0;
}

/* ==========================================
   МОДАЛЬНЫЕ ОКНА
   ========================================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 20px;
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 500px;
    padding: 35px;
    animation: slideIn 0.3s ease;
    max-height: 90vh;
    overflow-y: auto;
}

@keyframes slideIn {
    from { transform: translateY(-30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-title {
    text-align: center;
    margin-bottom: 25px;
    font-size: 1.8rem;
}

.close-btn {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.3s;
    background: none;
    border: none;
    line-height: 1;
}

.close-btn:hover {
    color: var(--accent-pink);
    transform: scale(1.2);
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

input, select {
    width: 100%;
    padding: 14px 16px;
    background: rgba(10, 10, 15, 0.7);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: white;
    font-family: 'Montserrat', sans-serif;
    font-size: 1rem;
    outline: none;
    transition: border 0.3s;
}

input:focus, select:focus {
    border-color: var(--accent-purple);
    box-shadow: 0 0 15px rgba(157, 78, 221, 0.4);
}

select option {
    background: #1a0b2e;
    color: white;
}

.form-agreement {
    font-size: 0.75rem;
    text-align: center;
    margin-top: 15px;
    color: var(--text-secondary);
}

.payment-details {
    background: rgba(0, 245, 212, 0.1);
    padding: 15px;
    border-radius: 12px;
    margin-bottom: 20px;
    text-align: center;
}

.payment-details p {
    margin: 5px 0;
}

/* ==========================================
   TOAST УВЕДОМЛЕНИЯ
   ========================================== */
.toast {
    visibility: hidden;
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-cyan);
    color: #0b0c10;
    font-weight: 700;
    padding: 15px 30px;
    border-radius: 50px;
    z-index: 2000;
    box-shadow: 0 5px 20px rgba(0, 245, 212, 0.5);
    text-align: center;
    white-space: nowrap;
    max-width: 90vw;
    overflow: hidden;
    text-overflow: ellipsis;
}

.toast.show {
    visibility: visible;
    animation: fadeInOut 3s ease;
}

.toast.error {
    background: var(--error);
    color: white;
    box-shadow: 0 5px 20px rgba(231, 76, 60, 0.5);
}

@keyframes fadeInOut {
    0% { opacity: 0; bottom: 20px; }
    10% { opacity: 1; bottom: 30px; }
    80% { opacity: 1; bottom: 30px; }
    100% { opacity: 0; bottom: 20px; }
}

/* ==========================================
   ФУТЕР
   ========================================== */
footer {
    text-align: center;
    margin-top: 40px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 15px;
    opacity: 0.8;
}

.footer-inn {
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.25);
    text-align: center;
    margin-top: 5px;
    letter-spacing: 1px;
}

.footer-inn:hover {
    color: rgba(255, 255, 255, 0.5);
}

/* ==========================================
   АДМИН-ПАНЕЛЬ
   ========================================== */
#adminPanel {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(20, 20, 30, 0.95);
    backdrop-filter: blur(20px);
    border: 2px solid var(--accent-cyan);
    border-radius: 20px;
    padding: 30px;
    z-index: 9999;
    min-width: 400px;
    max-width: 90vw;
    max-height: 80vh;
    overflow-y: auto;
}

#adminPanel h2 {
    margin-bottom: 20px;
    color: var(--accent-cyan);
}

.payment-item {
    background: rgba(0, 0, 0, 0.3);
    padding: 15px;
    margin: 10px 0;
    border-radius: 10px;
    border: 1px solid var(--glass-border);
}

.payment-item p {
    margin: 5px 0;
    font-size: 0.9rem;
}

/* ==========================================
   АДАПТИВНОСТЬ
   ========================================== */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        text-align: center;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .card {
        padding: 20px;
    }
    
    .task-actions {
        flex-direction: column;
    }
    
    .logo {
        font-size: 1.5rem;
    }
    
    .modal-content {
        padding: 25px;
        margin: 10px;
    }
    
    .subject-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    #adminPanel {
        min-width: 300px;
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .subject-grid {
        grid-template-columns: 1fr;
    }
    
    .hero h1 {
        font-size: 1.5rem;
    }
    
    .btn-primary, .btn-secondary {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
}