/* ==========================================================================
   ServiceNet LTD — основной стиль
   Дизайн в духе Comtel: синий/белый, крупная типографика, чистая сетка
   ========================================================================== */

/* === 1. ПЕРЕМЕННЫЕ === */
:root {
    --blue:        #0057B8;
    --blue-dark:   #003D82;
    --blue-accent: #00A0E3;
    --blue-light:  #E6F0FA;
    --bg:          #FFFFFF;
    --bg-soft:     #F5F8FC;
    --text:        #1A1A1A;
    --text-muted:  #6B7280;
    --border:      #E1E8F0;
    --white:       #FFFFFF;
    --success:     #16A34A;
    --error:       #DC2626;
    --radius:      10px;
    --radius-sm:   6px;
    --shadow:      0 2px 8px rgba(0, 61, 130, 0.08);
    --shadow-lg:   0 8px 24px rgba(0, 61, 130, 0.12);
    --container:   1200px;
    --header-h:    72px;
    --transition:  0.2s ease;
}

/* === 2. СБРОС === */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans Georgian', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--blue);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover { color: var(--blue-dark); }

/* === 3. КОНТЕЙНЕР === */
.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 20px;
}

/* === 4. ШАПКА (фиксированная) === */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
    height: var(--header-h);
}

.header-inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 20px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.logo-img {
    height: 40px;
    width: auto;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--blue-dark);
    letter-spacing: -0.3px;
}

/* Навигация */
.main-nav {
    display: flex;
    align-items: center;
    gap: 24px;
    flex: 1;
    justify-content: flex-end;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
}

.nav-list a {
    display: block;
    padding: 8px 12px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    border-radius: var(--radius-sm);
    white-space: nowrap;
    transition: background var(--transition), color var(--transition);
}

.nav-list a:hover {
    background: var(--blue-light);
    color: var(--blue-dark);
}

.nav-list a.active {
    background: var(--blue);
    color: var(--white);
}

/* Переключатель языков */
.lang-switch {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    padding-left: 16px;
    border-left: 1px solid var(--border);
}

.lang-switch a {
    color: var(--text-muted);
    padding: 4px 6px;
}

.lang-switch a.active {
    color: var(--blue);
}

.lang-switch span {
    color: var(--border);
}

/* Кнопка доступности */
.accessibility-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--blue-light);
    font-size: 18px;
    transition: background var(--transition);
}

.accessibility-btn:hover {
    background: var(--blue);
}

/* Кнопка мобильного меню */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--blue-dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* === 5. ОСНОВНОЙ КОНТЕНТ === */
.site-main {
    flex: 1;
    padding: 0;
}

/* === 6. HERO === */
.hero {
    background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue) 100%);
    color: var(--white);
    padding: 80px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-inner {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: clamp(28px, 5vw, 48px);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.hero p {
    font-size: clamp(16px, 2vw, 20px);
    opacity: 0.95;
    margin-bottom: 32px;
    line-height: 1.5;
}

.hero-mascot {
    max-width: 300px;
    margin: 32px auto 0;
}

/* === 7. КНОПКИ === */
.btn {
    display: inline-block;
    padding: 14px 28px;
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--radius);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
    font-family: inherit;
}

.btn-primary {
    background: var(--white);
    color: var(--blue-dark);
}

.btn-primary:hover {
    background: var(--blue-light);
    color: var(--blue-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--blue);
    border-color: var(--blue);
}

.btn-outline:hover {
    background: var(--blue);
    color: var(--white);
}

.btn-secondary {
    background: var(--blue);
    color: var(--white);
}

.btn-secondary:hover {
    background: var(--blue-dark);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* === 8. СЕКЦИИ === */
.section {
    padding: 72px 20px;
}

.section-soft {
    background: var(--bg-soft);
}

.section-title {
    font-size: clamp(24px, 4vw, 36px);
    font-weight: 800;
    color: var(--blue-dark);
    text-align: center;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-muted);
    text-align: center;
    max-width: 700px;
    margin: 0 auto 48px;
}

/* === 9. КАРТОЧКИ === */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    max-width: var(--container);
    margin: 0 auto;
}

.card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
}

.card:hover {
    border-color: var(--blue-accent);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.card-icon {
    width: 56px;
    height: 56px;
    margin-bottom: 20px;
    object-fit: contain;
}

.card h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--blue-dark);
    margin-bottom: 12px;
}

.card p {
    color: var(--text-muted);
    margin-bottom: 20px;
    flex: 1;
}

/* Карточка тарифа */
.tariff-card {
    background: var(--white);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 28px;
    text-align: center;
    transition: all var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
}

.tariff-card:hover {
    border-color: var(--blue);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.tariff-card.featured {
    border-color: var(--blue);
    box-shadow: var(--shadow-lg);
}

.tariff-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--blue);
    color: var(--white);
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tariff-name {
    font-size: 20px;
    font-weight: 700;
    color: var(--blue-dark);
    margin-bottom: 8px;
}

.tariff-speed {
    font-size: 42px;
    font-weight: 800;
    color: var(--blue);
    line-height: 1;
    margin-bottom: 4px;
}

.tariff-speed-unit {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.tariff-price {
    font-size: 32px;
    font-weight: 800;
    color: var(--blue-dark);
    margin: 20px 0 4px;
}

.tariff-price-currency {
    font-size: 16px;
    color: var(--text-muted);
    font-weight: 500;
}

.tariff-features {
    list-style: none;
    text-align: left;
    margin: 24px 0;
    padding: 0;
}

.tariff-features li {
    padding: 8px 0 8px 28px;
    position: relative;
    color: var(--text);
    font-size: 15px;
}

.tariff-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: 700;
}

.tariff-note {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 8px;
    font-style: italic;
}

/* === 10. ТАБЛИЦА ТАРИФОВ === */
.pricing-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    max-width: var(--container);
    margin: 0 auto;
}

.pricing-table th,
.pricing-table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.pricing-table th {
    background: var(--blue-dark);
    color: var(--white);
    font-weight: 600;
    font-size: 15px;
}

.pricing-table tr:last-child td {
    border-bottom: none;
}

.pricing-table tr:hover td {
    background: var(--blue-light);
}

/* === 11. ФОРМА === */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--blue-dark);
    font-size: 15px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 16px;
    font-family: inherit;
    color: var(--text);
    background: var(--white);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--blue);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-message {
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-weight: 500;
}

.form-message.success {
    background: #DCFCE7;
    color: #166534;
    border: 1px solid #86EFAC;
}

.form-message.error {
    background: #FEE2E2;
    color: #991B1B;
    border: 1px solid #FCA5A5;
}

/* === 12. ПОДВАЛ === */
.site-footer {
    background: var(--blue-dark);
    color: var(--white);
    padding: 56px 20px 0;
    margin-top: auto;
}

.footer-inner {
    max-width: var(--container);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}

.footer-logo {
    height: 40px;
    width: auto;
    margin-bottom: 16px;
    filter: brightness(0) invert(1);
}

.footer-company {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
}

.footer-legal {
    font-size: 13px;
    opacity: 0.7;
    margin-bottom: 12px;
    font-style: italic;
    color: rgba(255, 255, 255, 0.85);
}

.footer-address,
.footer-contact {
    font-size: 14px;
    opacity: 0.85;
    line-height: 1.8;
}

.footer-contact a {
    color: var(--white);
}

.footer-contact a:hover {
    color: var(--blue-accent);
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--white);
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 10px;
}

.footer-col a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
}

.footer-col a:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding: 20px;
    text-align: center;
    font-size: 13px;
    opacity: 0.7;
    max-width: var(--container);
    margin: 0 auto;
}

/* === 13. СЛУЖЕБНЫЕ СТРАНИЦЫ === */
.error-page {
    text-align: center;
    padding: 80px 20px;
    max-width: 600px;
    margin: 0 auto;
}

.error-page h1 {
    font-size: 72px;
    font-weight: 800;
    color: var(--blue);
    line-height: 1;
    margin-bottom: 16px;
}

.error-page h2 {
    font-size: 24px;
    color: var(--blue-dark);
    margin-bottom: 16px;
}

.error-page p {
    color: var(--text-muted);
    margin-bottom: 32px;
}

.error-mascot {
    max-width: 250px;
    margin: 0 auto 32px;
}

/* === 14. TOOLS — калькуляторы === */
.tool-box {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    max-width: 800px;
    margin: 0 auto 32px;
    box-shadow: var(--shadow);
}

.tool-box h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--blue-dark);
    margin-bottom: 20px;
}

.tool-result {
    background: var(--blue-light);
    border-radius: var(--radius-sm);
    padding: 20px;
    margin-top: 20px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.9;
}

.tool-result strong {
    color: var(--blue-dark);
}

.ip-display {
    background: linear-gradient(135deg, var(--blue-dark), var(--blue));
    color: var(--white);
    padding: 32px;
    border-radius: var(--radius);
    text-align: center;
    max-width: 800px;
    margin: 0 auto 32px;
}

.ip-display .ip-value {
    font-size: 32px;
    font-weight: 800;
    font-family: 'Courier New', monospace;
    margin: 12px 0;
}

.ip-display .ip-label {
    font-size: 14px;
    opacity: 0.85;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Скрытое подменю Tools (только для owner) */
.tools-submenu {
    background: var(--blue-light);
    border-left: 4px solid var(--blue);
    padding: 20px 24px;
    border-radius: var(--radius-sm);
    margin: 24px auto;
    max-width: 800px;
}

.tools-submenu h4 {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--blue-dark);
    margin-bottom: 12px;
}

.tools-submenu ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.tools-submenu a {
    display: inline-block;
    padding: 8px 16px;
    background: var(--white);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 14px;
    color: var(--blue-dark);
    transition: all var(--transition);
}

.tools-submenu a:hover {
    background: var(--blue);
    color: var(--white);
}

/* === 15. РЕЖИМ ДЛЯ СЛАБОВИДЯЩИХ === */
body.a11y-large {
    font-size: 20px;
}

body.a11y-large h1 { font-size: 2.5em; }
body.a11y-large h2 { font-size: 2em; }
body.a11y-large h3 { font-size: 1.5em; }

body.a11y-contrast {
    --text: #000000;
    --text-muted: #000000;
    --bg: #FFFFFF;
    --bg-soft: #FFFFFF;
    --border: #000000;
}

body.a11y-contrast .site-header,
body.a11y-contrast .card,
body.a11y-contrast .tariff-card,
body.a11y-contrast .tool-box {
    border: 2px solid #000000;
}

body.a11y-contrast a {
    text-decoration: underline;
}

/* Панель управления доступностью */
.a11y-panel {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--white);
    border: 2px solid var(--blue);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.a11y-panel button {
    padding: 10px 16px;
    font-size: 14px;
    font-weight: 600;
    background: var(--blue-light);
    color: var(--blue-dark);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
    text-align: left;
}

.a11y-panel button:hover,
.a11y-panel button.active {
    background: var(--blue);
    color: var(--white);
}

/* === 16. КАРТОЧКИ ДОГОВОРОВ (красная кайма) === */
.contract-card {
    background: var(--white);
    border: 3px solid #DC2626;
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
}

.contract-card:hover {
    box-shadow: 0 12px 32px rgba(220, 38, 38, 0.18);
    transform: translateY(-4px);
}

.contract-icon {
    font-size: 48px;
    line-height: 1;
    margin-bottom: 16px;
}

.contract-title {
    font-size: 22px;
    font-weight: 700;
    color: #991B1B;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid #FEE2E2;
}

.contract-block {
    margin-bottom: 20px;
}

.contract-block h4 {
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #991B1B;
    margin-bottom: 10px;
}

.contract-block ul,
.contract-block ol {
    padding-left: 20px;
    font-size: 15px;
    line-height: 1.7;
    color: var(--text);
}

.contract-block li {
    margin-bottom: 6px;
}

.contract-downloads {
    margin-top: auto;
    padding-top: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.contract-downloads .btn {
    flex: 1;
    min-width: 160px;
    padding: 12px 20px;
    font-size: 14px;
}

/* Красная кнопка для договоров */
.contract-downloads .btn-secondary {
    background: #DC2626;
    border-color: #DC2626;
}

.contract-downloads .btn-secondary:hover {
    background: #991B1B;
    border-color: #991B1B;
}

/* === 17. АДАПТИВ === */
@media (max-width: 1024px) {
    .footer-inner {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 900px) {
    .menu-toggle {
        display: flex;
    }
    
    .main-nav {
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        background: var(--white);
        border-bottom: 1px solid var(--border);
        flex-direction: column;
        align-items: stretch;
        padding: 20px;
        gap: 16px;
        transform: translateY(-110%);
        transition: transform 0.3s ease;
        max-height: calc(100vh - var(--header-h));
        overflow-y: auto;
        box-shadow: var(--shadow-lg);
    }
    
    .main-nav.open {
        transform: translateY(0);
    }
    
    .nav-list {
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
    }
    
    .nav-list a {
        padding: 12px 16px;
        font-size: 16px;
    }
    
    .lang-switch {
        border-left: none;
        border-top: 1px solid var(--border);
        padding: 16px 0 0;
        justify-content: center;
    }
    
    .accessibility-btn {
        align-self: center;
    }
}

@media (max-width: 600px) {
    .section {
        padding: 48px 16px;
    }
    
    .hero {
        padding: 56px 16px;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-inner {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .pricing-table {
        font-size: 14px;
    }
    
    .pricing-table th,
    .pricing-table td {
        padding: 12px 10px;
    }
}

/* === 18. ПЕЧАТЬ === */
@media print {
    .site-header,
    .site-footer,
    .a11y-panel,
    .btn {
        display: none;
    }
    
    body {
        font-size: 12pt;
        color: #000;
    }
}