/**
 * Стили для страницы "Тарифы"
 * Erudia.ru - Образовательная платформа
 * Все стили изолированы через класс .tariffs-page
 */

/* ==================== CSS VARIABLES (изолированные для страницы) ==================== */
.tariffs-page {
    --tariffs-primary: #2980b9;
    --tariffs-primary-hover: #21618c;
    --tariffs-primary-dark: #1e6091;
    --tariffs-primary-light: #ebf4ff;
    --tariffs-secondary: #3190cf;
    --tariffs-accent-light: #40a0d6;
    --tariffs-accent-lighter: #4fb0dd;
    --tariffs-accent-orange: #ed8936;
    --tariffs-accent-green: #48bb78;
    --tariffs-accent-purple: #9f7aea;
    --tariffs-gray-50: #f7fafc;
    --tariffs-gray-100: #edf2f7;
    --tariffs-gray-200: #e2e8f0;
    --tariffs-gray-300: #cbd5e0;
    --tariffs-gray-400: #a0aec0;
    --tariffs-gray-500: #718096;
    --tariffs-gray-600: #4a5568;
    --tariffs-gray-700: #2d3748;
    --tariffs-gray-800: #1a202c;
    --tariffs-gray-900: #171923;
    --tariffs-shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --tariffs-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --tariffs-shadow-md: 0 15px 30px -5px rgba(0, 0, 0, 0.15);
    --tariffs-shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    --tariffs-shadow-blue: 0 10px 30px rgba(41, 128, 185, 0.2);
    --tariffs-radius: 1rem;
    --tariffs-radius-md: 0.75rem;
    --tariffs-radius-sm: 0.5rem;
}

/* ==================== LAYOUT ==================== */
.tariffs-page .container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ==================== HERO SECTION ==================== */
.tariffs-page .hero-section {
    background: linear-gradient(135deg, #f7fafc 0%, #ffffff 50%, #f7fafc 100%);
    padding: 5rem 0 4rem;
    position: relative;
    overflow: hidden;
    margin-bottom: 3rem;
}

.tariffs-page .hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(41, 128, 185, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.tariffs-page .hero-section::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -5%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(52, 152, 219, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.tariffs-page .hero-text {
    text-align: center;
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.8s ease-out;
}

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

.tariffs-page .hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--tariffs-gray-900);
    letter-spacing: -0.02em;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.tariffs-page .hero-title .highlight {
    background: linear-gradient(135deg, var(--tariffs-primary) 0%, var(--tariffs-secondary) 50%, var(--tariffs-accent-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.tariffs-page .hero-subtitle {
    font-size: 1.25rem;
    color: var(--tariffs-gray-600);
    max-width: 48rem;
    margin: 0 auto;
    line-height: 1.8;
    font-weight: 400;
    animation: fadeInUp 0.8s ease-out 0.3s both;
}

/* ==================== FILTER SECTION ==================== */
.tariffs-page .filter-section {
    background: white;
    padding: 2rem;
    border-radius: 1.75rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    margin-bottom: 3rem;
    border: 2px solid var(--tariffs-gray-200);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.tariffs-page .filter-section:hover {
    border-color: var(--tariffs-primary);
    box-shadow: 0 15px 30px -5px rgba(0, 0, 0, 0.15);
}

.tariffs-page .filter-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--tariffs-gray-100);
}

.tariffs-page .filter-icon {
    width: 2.5rem;
    height: 2.5rem;
    background: linear-gradient(135deg, var(--tariffs-primary) 0%, var(--tariffs-secondary) 50%, var(--tariffs-accent-light) 100%);
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 6px 16px -4px rgba(41, 128, 185, 0.35), 0 2px 4px -1px rgba(41, 128, 185, 0.2);
}

.tariffs-page .filter-icon .icon {
    width: 1.25rem;
    height: 1.25rem;
}

.tariffs-page .filter-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--tariffs-gray-800);
    letter-spacing: -0.02em;
}

.tariffs-page .filter-buttons {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.tariffs-page .filter-btn {
    padding: 0.75rem 1.25rem;
    border: 2px solid var(--tariffs-gray-200);
    background: white;
    color: var(--tariffs-gray-700);
    border-radius: var(--tariffs-radius-md);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.tariffs-page .filter-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.tariffs-page .filter-btn:hover::before {
    left: 100%;
}

.tariffs-page .filter-btn:hover {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafb 100%);
    border-color: var(--tariffs-primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px -4px rgba(41, 128, 185, 0.25), 0 2px 4px -1px rgba(41, 128, 185, 0.15);
}

.tariffs-page .filter-btn.active {
    background: linear-gradient(135deg, var(--tariffs-primary) 0%, var(--tariffs-secondary) 50%, var(--tariffs-accent-light) 100%);
    color: white;
    border-color: transparent;
    box-shadow: 0 6px 16px -4px rgba(41, 128, 185, 0.35), 0 2px 4px -1px rgba(41, 128, 185, 0.2);
}

.tariffs-page .filter-btn.active:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 20px -4px rgba(41, 128, 185, 0.4), 0 4px 8px -2px rgba(41, 128, 185, 0.25);
}

.tariffs-page .filter-btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1.25rem;
    height: 1.25rem;
    flex-shrink: 0;
}

.tariffs-page .filter-btn-icon svg {
    width: 100%;
    height: 100%;
    transition: transform 0.3s ease;
}

.tariffs-page .filter-btn:hover .filter-btn-icon svg {
    transform: scale(1.1);
}

.tariffs-page .filter-btn-text {
    white-space: nowrap;
}

/* ==================== TARIFFS SECTIONS ==================== */
.tariffs-page .tariffs-section {
    margin-bottom: 4rem;
}

.tariffs-page .tariffs-section.hidden {
    display: none;
}

.tariffs-page .section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--tariffs-gray-900);
    margin-bottom: 2rem;
    letter-spacing: -0.02em;
    text-align: center;
}

/* ==================== TARIFFS GRID ==================== */
.tariffs-page .tariffs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

/* ==================== TARIFF CARD ==================== */
.tariffs-page .tariff-card {
    background: white;
    border-radius: 1.75rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid var(--tariffs-gray-200);
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
    max-width: 400px;
    width: 100%;
}

.tariffs-page .tariff-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--tariffs-primary), var(--tariffs-secondary), var(--tariffs-accent-light));
    transform: scaleX(0);
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 10px rgba(41, 128, 185, 0.4);
}

.tariffs-page .tariff-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(41, 128, 185, 0.05) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
}

.tariffs-page .tariff-card:hover::before {
    transform: scaleX(1);
}

.tariffs-page .tariff-card:hover::after {
    opacity: 1;
}

.tariffs-page .tariff-card:hover {
    transform: translateY(-12px) scale(1.01);
    box-shadow: 0 25px 50px -12px rgba(41, 128, 185, 0.25);
    border-color: var(--tariffs-primary);
    background: linear-gradient(135deg, #ffffff 0%, #f8fafb 100%);
}

.tariffs-page .tariff-card.featured {
    border-color: var(--tariffs-primary);
    box-shadow: 0 10px 30px rgba(41, 128, 185, 0.2);
}

.tariffs-page .tariff-card.featured::before {
    transform: scaleX(1);
}

.tariffs-page .tariff-badge-featured {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: linear-gradient(135deg, var(--tariffs-primary) 0%, var(--tariffs-secondary) 50%, var(--tariffs-accent-light) 100%);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--tariffs-radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: 0 4px 12px rgba(41, 128, 185, 0.3);
    z-index: 2;
}

.tariffs-page .tariff-card-header {
    padding: 2rem 1.5rem 1.5rem;
    border-bottom: 2px solid var(--tariffs-gray-100);
    position: relative;
    z-index: 1;
    text-align: center;
}

.tariffs-page .tariff-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.875rem;
    border-radius: var(--tariffs-radius-sm);
    font-size: 0.8125rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    background: linear-gradient(135deg, var(--tariffs-primary-light), #dbeafe);
    color: var(--tariffs-primary);
}

.tariffs-page .tariff-badge.tutor {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    color: #d97706;
    box-shadow: 0 2px 8px rgba(217, 119, 6, 0.2);
}

.tariffs-page .tariff-badge.notes {
    background: linear-gradient(135deg, #f0fdf4, #dcfce7);
    color: #16a34a;
    box-shadow: 0 2px 8px rgba(22, 163, 74, 0.2);
}

.tariffs-page .tariff-badge.diploma {
    background: linear-gradient(135deg, #e0f2fe, #bae6fd);
    color: #0284c7;
    box-shadow: 0 2px 8px rgba(2, 132, 199, 0.2);
}

.tariffs-page .tariff-badge.test {
    background: linear-gradient(135deg, var(--tariffs-primary-light), #dbeafe);
    color: var(--tariffs-primary);
    box-shadow: 0 2px 8px rgba(41, 128, 185, 0.2);
}

.tariffs-page .tariff-badge.check {
    background: linear-gradient(135deg, #fef2f2, #fee2e2);
    color: #dc2626;
    box-shadow: 0 2px 8px rgba(220, 38, 38, 0.2);
}

.tariffs-page .tariff-badge.presentation {
    background: linear-gradient(135deg, #faf5ff, #f3e8ff);
    color: #9333ea;
    box-shadow: 0 2px 8px rgba(147, 51, 234, 0.2);
}

.tariffs-page .tariff-badge.combo-badge {
    background: linear-gradient(135deg, var(--tariffs-accent-orange), #f6ad55);
    color: white;
    box-shadow: 0 2px 8px rgba(237, 137, 54, 0.3);
}

.tariffs-page .tariff-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--tariffs-gray-900);
    margin-bottom: 1rem;
    line-height: 1.5;
    letter-spacing: -0.01em;
    transition: color 0.3s ease;
}

.tariffs-page .tariff-card:hover .tariff-title {
    color: var(--tariffs-primary);
}

.tariffs-page .tariff-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.tariffs-page .tariff-price-amount {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--tariffs-gray-900);
    line-height: 1;
}

.tariffs-page .tariff-price-period {
    font-size: 1rem;
    color: var(--tariffs-gray-500);
    font-weight: 500;
}

.tariffs-page .tariff-savings {
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--tariffs-accent-green);
    font-weight: 600;
    text-align: center;
}

.tariffs-page .tariff-card-body {
    flex: 1;
    padding: 1.5rem;
    position: relative;
    z-index: 1;
}

.tariffs-page .tariff-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tariffs-page .tariff-feature {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem 0;
    color: var(--tariffs-gray-700);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.tariffs-page .tariff-feature:not(:last-child) {
    border-bottom: 1px solid var(--tariffs-gray-100);
}

/* ==================== COMBO PACKAGES ==================== */
.tariffs-page .tariff-card.combo {
    border-color: var(--tariffs-accent-orange);
}

.tariffs-page .tariff-card.combo::before {
    background: linear-gradient(90deg, var(--tariffs-accent-orange), #f6ad55, var(--tariffs-accent-orange));
}

.tariffs-page .combo-includes {
    margin-top: 0.5rem;
}

.tariffs-page .combo-includes-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--tariffs-gray-600);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tariffs-page .feature-icon {
    width: 1.25rem;
    height: 1.25rem;
    color: var(--tariffs-accent-green);
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.tariffs-page .tariff-card-footer {
    padding: 1.5rem;
    border-top: 2px solid var(--tariffs-gray-100);
    position: relative;
    z-index: 1;
}

/* ==================== TARIFF BUTTON ==================== */
.tariffs-page .tariff-btn {
    width: 100%;
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: var(--tariffs-radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.tariffs-page .tariff-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.tariffs-page .tariff-btn:hover::before {
    left: 100%;
}

.tariffs-page .tariff-btn {
    background: var(--tariffs-gray-100);
    color: var(--tariffs-gray-700);
    border: 2px solid var(--tariffs-gray-300);
}

.tariffs-page .tariff-btn:hover {
    background: var(--tariffs-gray-200);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.tariffs-page .tariff-btn.primary {
    background: linear-gradient(135deg, var(--tariffs-primary) 0%, var(--tariffs-secondary) 50%, var(--tariffs-accent-light) 100%);
    color: white;
    border: none;
    box-shadow: 0 4px 15px rgba(41, 128, 185, 0.3);
}

.tariffs-page .tariff-btn.primary:hover {
    background: linear-gradient(135deg, var(--tariffs-primary-hover) 0%, var(--tariffs-primary) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(41, 128, 185, 0.4);
}

/* ==================== UTILITIES ==================== */
.tariffs-page .hidden {
    display: none !important;
}

/* ==================== RESPONSIVE DESIGN ==================== */

/* Tablet */
@media (max-width: 768px) {
    .tariffs-page .hero-section {
        padding: 3rem 0 2.5rem;
    }

    .tariffs-page .hero-title {
        font-size: 2.25rem;
        line-height: 1.2;
    }

    .tariffs-page .hero-subtitle {
        font-size: 1rem;
    }

    .tariffs-page .tariffs-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .tariffs-page .tariff-price-amount {
        font-size: 2rem;
    }

    .tariffs-page .filter-section {
        padding: 1.5rem;
        margin-bottom: 2rem;
    }

    .tariffs-page .filter-header {
        margin-bottom: 1.25rem;
        padding-bottom: 0.875rem;
    }

    .tariffs-page .filter-buttons {
        gap: 0.5rem;
    }

    .tariffs-page .filter-btn {
        font-size: 0.8125rem;
        padding: 0.625rem 1rem;
    }

    .tariffs-page .section-title {
        font-size: 1.75rem;
    }
}

/* Mobile */
@media (max-width: 480px) {
    .tariffs-page .container {
        padding: 0 1rem;
    }

    .tariffs-page .hero-section {
        padding: 2.5rem 0 2rem;
        margin-bottom: 2rem;
    }

    .tariffs-page .hero-title {
        font-size: 1.875rem;
        margin-bottom: 1rem;
    }

    .tariffs-page .hero-subtitle {
        font-size: 0.9375rem;
    }

    .tariffs-page .tariffs-grid {
        gap: 1.25rem;
    }

    .tariffs-page .tariff-card {
        border-radius: 1.25rem;
    }

    .tariffs-page .tariff-card-header {
        padding: 1.5rem 1rem 1.25rem;
    }

    .tariffs-page .tariff-card-body {
        padding: 1.25rem 1rem;
    }

    .tariffs-page .tariff-card-footer {
        padding: 1.25rem 1rem;
    }

    .tariffs-page .tariff-price-amount {
        font-size: 1.75rem;
    }

    .tariffs-page .tariff-badge-featured {
        top: 1rem;
        right: 1rem;
        padding: 0.375rem 0.75rem;
        font-size: 0.6875rem;
    }

    .tariffs-page .filter-section {
        padding: 1rem;
        margin-bottom: 1.5rem;
        border-radius: 1.25rem;
    }

    .tariffs-page .filter-header {
        margin-bottom: 1rem;
        padding-bottom: 0.75rem;
    }

    .tariffs-page .filter-icon {
        width: 2rem;
        height: 2rem;
    }

    .tariffs-page .filter-title {
        font-size: 1rem;
    }

    .tariffs-page .filter-buttons {
        gap: 0.375rem;
    }

    .tariffs-page .filter-btn {
        font-size: 0.75rem;
        padding: 0.5rem 0.875rem;
    }

    .tariffs-page .section-title {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }
}