/* Основные стили для Brainify - Новая концепция */
/*
 * Шрифты подключайте в <head> через <link>, не через @import здесь —
 * иначе браузер задерживает весь main.css, пока грузится fonts.googleapis.com
 * (страница «серая», цвета «плывут» при медленной сети).
 */
@import url('site-legal-footer.css');

/* Базовые стили */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    color-scheme: light;
}

/* Публичные страницы (не кабинет / auth / групповая доска) */
body:not(.dashboard-body):not(.auth-body):not(.wb-group-body) {
    font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #ffffff;
    line-height: 1.6;
    color: #1e293b;
}

body.landing-page {
    background: #ffffff;
    color: #1e293b;
}

/* Контейнеры */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Навигация */
.navbar {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

/* Убеждаемся, что контент поверх левитирующих фигур */
.hero, .section {
    position: relative;
    z-index: 10;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo {
    font-size: 1.75rem;
    font-weight: 800;
    color: #1e293b;
}

.nav-logo-green {
    background: linear-gradient(135deg, #a3e635, #84cc16);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-link {
    color: #475569;
    text-decoration: none;
    font-weight: 600;
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #a3e635, #84cc16);
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: #84cc16;
}

.nav-link:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: #475569;
}

.mobile-menu {
    display: none;
    padding: 1rem 0;
}

.mobile-menu:not(.hidden) {
    display: block;
}

.mobile-menu ul {
    list-style: none;
}

.mobile-menu li {
    padding: 0;
}

.mobile-menu a {
    color: #475569;
    text-decoration: none;
    display: block;
    padding: 0.875rem 1.25rem;
    font-size: 1rem;
    font-weight: 600;
    border-bottom: 1px solid #f1f5f9;
    -webkit-tap-highlight-color: transparent;
    transition: background-color 0.15s ease;
}

.mobile-menu a:hover,
.mobile-menu a:active {
    background-color: #f0fdf4;
    color: #84cc16;
}

/* Hero секция */
body:not(.dashboard-body) .hero {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    padding: 4rem 1rem;
    position: relative;
    overflow: hidden;
}

body:not(.dashboard-body) .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="rgba(163,230,53,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.5;
}

body:not(.dashboard-body) .hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
    position: relative;
    z-index: 1;
}

body:not(.dashboard-body) .hero-text {
    text-align: center;
    max-width: 600px;
}

body:not(.dashboard-body) .hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    color: #1e293b;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.highlight {
    background: linear-gradient(135deg, #a3e635, #84cc16);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

body:not(.dashboard-body) .hero-subtitle {
    font-size: 1.25rem;
    color: #64748b;
    margin-bottom: 2rem;
    font-weight: 400;
}

/* Главные кнопки */
body:not(.dashboard-body) .main-buttons {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

body:not(.dashboard-body) .main-btn {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 2rem;
    border-radius: 20px;
    text-decoration: none;
    background: #ffffff;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    border: 2px solid transparent;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

body:not(.dashboard-body) .main-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(163, 230, 53, 0.1), transparent);
    transition: left 0.5s;
}

body:not(.dashboard-body) .main-btn:hover::before {
    left: 100%;
}

body:not(.dashboard-body) .main-btn:hover {
    transform: translateX(10px) scale(1.02);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

body:not(.dashboard-body) .main-btn-primary {
    border-color: #a3e635;
}

body:not(.dashboard-body) .main-btn-primary:hover {
    background: linear-gradient(135deg, #a3e635, #84cc16);
    color: white;
}

body:not(.dashboard-body) .main-btn-primary:hover .btn-icon {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

body:not(.dashboard-body) .main-btn-secondary {
    border-color: #84cc16;
}

body:not(.dashboard-body) .main-btn-secondary:hover {
    background: linear-gradient(135deg, #84cc16, #65a30d);
    color: white;
}

body:not(.dashboard-body) .main-btn-secondary:hover .btn-icon {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

body:not(.dashboard-body) .main-btn-accent {
    border-color: #65a30d;
}

body:not(.dashboard-body) .main-btn-accent:hover {
    background: linear-gradient(135deg, #65a30d, #4d7c0f);
    color: white;
}

body:not(.dashboard-body) .main-btn-accent:hover .btn-icon {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

/* Дополнительные стили для органичности */
body:not(.dashboard-body) .main-btn:nth-child(1) {
    margin-left: 0;
}

body:not(.dashboard-body) .main-btn:nth-child(2) {
    margin-left: 2rem;
}

body:not(.dashboard-body) .main-btn:nth-child(3) {
    margin-left: 4rem;
}

@media (max-width: 768px) {
    body:not(.dashboard-body) .main-btn:nth-child(2),
    body:not(.dashboard-body) .main-btn:nth-child(3) {
        margin-left: 0;
    }
}

body:not(.dashboard-body) .btn-icon {
    width: 60px;
    height: 60px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: linear-gradient(135deg, #a3e635, #84cc16);
    color: white;
    flex-shrink: 0;
}

body:not(.dashboard-body) .btn-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #1e293b;
    transition: color 0.2s ease;
}

body:not(.dashboard-body) .btn-content p {
    font-size: 0.875rem;
    color: #64748b;
    opacity: 0.9;
    line-height: 1.4;
    transition: color 0.2s ease, opacity 0.2s ease;
}

body:not(.dashboard-body) .main-btn:hover .btn-content h3,
body:not(.dashboard-body) .main-btn:hover .btn-content p {
    color: #ffffff;
    opacity: 1;
}

/* Секции */
.section {
    padding: 4rem 1rem;
}

.section-white {
    background: #ffffff;
}

.section-light {
    background: #f8fafc;
}

.section-title {
    font-size: 0.8rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 1rem;
    text-align: center;
}

.section-subtitle {
    font-size: 1.125rem;
    color: #64748b;
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
    line-height: 1.6;
}

/* О нас секция */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-description {
    font-size: 1.125rem;
    color: #64748b;
    margin-bottom: 3rem;
    line-height: 1.7;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 3rem;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.feature {
    padding: 2.5rem;
    background: #ffffff;
    border-radius: 20px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(163, 230, 53, 0.1);
    transition: all 0.3s ease;
    text-align: center;
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(163, 230, 53, 0.15);
    border-color: #a3e635;
}

.feature i {
    font-size: 2.5rem;
    color: #a3e635;
    margin-bottom: 1.5rem;
}

.feature h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 1rem;
}

.feature p {
    color: #64748b;
    font-size: 1rem;
    line-height: 1.6;
}

/* Адаптивность для сетки */
@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

/* Контактная секция */
.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-subtitle {
    font-size: 1.125rem;
    color: #64748b;
    margin-bottom: 2rem;
}

.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, #a3e635, #84cc16);
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-family: inherit;
    font-size: inherit;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.125rem;
    box-shadow: 0 10px 30px rgba(163, 230, 53, 0.3);
    transition: all 0.3s ease;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(163, 230, 53, 0.4);
    background: linear-gradient(135deg, #84cc16, #65a30d);
}

/* Футер */
.footer {
    background: #1e293b;
    color: #94a3b8;
    padding: 2rem 1rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.footer-logo-green {
    background: linear-gradient(135deg, #a3e635, #84cc16);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Адаптивность — планшеты */
@media (max-width: 1024px) {
    body:not(.dashboard-body) .hero-title {
        font-size: 2.75rem;
    }
    
    body:not(.dashboard-body) .hero {
        padding: 3rem 1rem;
    }
    
    .section {
        padding: 3rem 1rem;
    }
    
    .feature {
        padding: 2rem;
    }
}

/* Адаптивность — мобилки */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .nav-container {
        padding: 0.75rem 1rem;
    }
    
    .nav-logo {
        font-size: 1.5rem;
    }
    
    body:not(.dashboard-body) .hero {
        padding: 2rem 0.75rem 2.5rem;
        background: linear-gradient(180deg, #f8fafc 0%, #eef6ff 100%);
    }
    
    body:not(.dashboard-body) .hero-title {
        font-size: 2rem;
        line-height: 1.25;
    }
    
    body:not(.dashboard-body) .hero-subtitle {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }
    
    body:not(.dashboard-body) .hero-content {
        gap: 2rem;
    }
    
    body:not(.dashboard-body) .main-buttons {
        max-width: 100%;
        padding: 0;
        gap: 1rem;
    }
    
    body:not(.dashboard-body) .main-btn {
        flex-direction: column;
        text-align: center;
        gap: 0.75rem;
        padding: 1.1rem;
        border-radius: 16px;
        border-width: 1px;
        box-shadow: 0 8px 20px rgba(15, 23, 42, 0.08);
    }
    
    body:not(.dashboard-body) .btn-icon {
        width: 48px;
        height: 48px;
        border-radius: 12px;
        font-size: 1.25rem;
    }
    
    body:not(.dashboard-body) .btn-content h3 {
        font-size: 1.05rem;
        margin-bottom: 0.25rem;
    }
    
    body:not(.dashboard-body) .btn-content p {
        font-size: 0.82rem;
        line-height: 1.3;
    }

    .mobile-menu {
        background: #ffffff;
        border-radius: 0 0 16px 16px;
        box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
    }
    
    .section {
        padding: 2.5rem 0.75rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .about-description {
        font-size: 1rem;
        margin-bottom: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .feature {
        padding: 1.5rem;
        border-radius: 16px;
    }
    
    .feature i {
        font-size: 2rem;
        margin-bottom: 1rem;
    }
    
    .feature h4 {
        font-size: 1.1rem;
        margin-bottom: 0.5rem;
    }
    
    .feature p {
        font-size: 0.9rem;
    }
    
    .contact-subtitle {
        font-size: 1rem;
    }
    
    .cta-button {
        padding: 0.875rem 1.75rem;
        font-size: 1rem;
    }
    
    .footer {
        padding: 1.5rem 0.75rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
    }
    
    .footer-logo {
        font-size: 1.25rem;
    }
}

/* Адаптивность — маленькие телефоны */
@media (max-width: 400px) {
    body:not(.dashboard-body) .hero-title {
        font-size: 1.75rem;
    }
    
    body:not(.dashboard-body) .main-btn {
        padding: 1rem;
    }
    
    body:not(.dashboard-body) .btn-icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .feature {
        padding: 1.25rem;
    }
}

/* Навигационные кнопки */
.nav-buttons {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-buttons > div {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.user-welcome {
    color: #2d3748;
    font-weight: 600;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    border: 2px solid #e2e8f0;
    font-size: 0.875rem;
}

.mobile-welcome {
    display: block;
    text-align: center;
    margin-bottom: 1rem;
    background: rgba(255, 255, 255, 0.95);
}

.nav-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid;
    border-radius: 25px;
    font-size: 0.875rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.nav-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.6s ease;
}

.nav-btn:hover::before {
    left: 100%;
}

.nav-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
    transition: all 0.4s ease;
    transform: translate(-50%, -50%);
    border-radius: 50%;
}

.nav-btn:hover::after {
    width: 300px;
    height: 300px;
}

.nav-btn-login {
    border-color: #64748b;
    color: #64748b;
    background: linear-gradient(135deg, rgba(100, 116, 139, 0.1), rgba(71, 85, 105, 0.05));
}

.nav-btn-login:hover {
    background: linear-gradient(135deg, #64748b, #475569);
    color: white;
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 12px 40px rgba(100, 116, 139, 0.4);
    border-color: #475569;
}

.nav-btn-register {
    border-color: #3b82f6;
    color: #3b82f6;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(37, 99, 235, 0.1));
}

.nav-btn-register:hover {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: white;
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 12px 40px rgba(59, 130, 246, 0.5);
    border-color: #2563eb;
}

.nav-btn-free {
    border-color: #a3e635;
    color: #84cc16;
    background: linear-gradient(135deg, rgba(163, 230, 53, 0.2), rgba(132, 204, 22, 0.15));
    animation: pulse-glow 2s infinite;
    position: relative;
}

.nav-btn-free::before {
    background: linear-gradient(90deg, transparent, rgba(163, 230, 53, 0.6), transparent);
}

.nav-btn-free:hover {
    background: linear-gradient(135deg, #a3e635, #84cc16);
    color: white;
    transform: translateY(-4px) scale(1.1);
    box-shadow: 0 15px 50px rgba(163, 230, 53, 0.6);
    border-color: #84cc16;
    animation: none;
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1), 0 0 20px rgba(163, 230, 53, 0.3);
    }
    50% {
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1), 0 0 30px rgba(163, 230, 53, 0.5);
    }
}

/* Мобильные навигационные кнопки */
.mobile-nav-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1.5rem;
    border-top: 2px solid rgba(163, 230, 53, 0.3);
    margin-top: 1rem;
    background: linear-gradient(135deg, rgba(163, 230, 53, 0.05), rgba(132, 204, 22, 0.02));
}

.mobile-nav-buttons .nav-btn {
    width: 100%;
    padding: 1rem 1.5rem;
    font-size: 0.875rem;
    text-align: center;
    border-radius: 20px;
}

.mobile-nav-buttons .nav-btn-free {
    background: linear-gradient(135deg, rgba(163, 230, 53, 0.3), rgba(132, 204, 22, 0.2));
    border-width: 3px;
}

/* Адаптивность для навигационных кнопок */
@media (max-width: 1200px) {
    .nav-buttons {
        gap: 0.75rem;
    }
    
    .nav-btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.8rem;
        letter-spacing: 0.08em;
    }
}

@media (max-width: 1024px) {
    .nav-buttons {
        gap: 0.5rem;
    }
    
    .nav-btn {
        padding: 0.5rem 1rem;
        font-size: 0.75rem;
        letter-spacing: 0.05em;
    }
}

@media (max-width: 768px) {
    .nav-buttons {
        display: none;
    }
    
    .mobile-nav-buttons {
        display: flex;
    }

    .mobile-nav-buttons .unauthorized-buttons,
    .mobile-nav-buttons .authorized-buttons {
        width: 100%;
        display: flex !important;
        flex-direction: column;
        gap: 0.65rem;
    }

    body:not(.dashboard-body) .main-buttons {
        display: grid;
        grid-template-columns: 1fr;
    }

    body:not(.dashboard-body) .main-btn {
        width: 100%;
        align-items: flex-start;
        text-align: left;
    }
}

@media (min-width: 769px) {
    .mobile-nav-buttons {
        display: none;
    }
}

/* Стили для управления видимостью кнопок в зависимости от состояния аутентификации */

/* По умолчанию показываем кнопки для неавторизованных пользователей */
.unauthorized-buttons {
    display: flex !important;
}

.authorized-buttons {
    display: none !important;
}

/* Когда пользователь аутентифицирован */
body.user-authenticated .unauthorized-buttons {
    display: none !important;
}

body.user-authenticated .authorized-buttons {
    display: flex !important;
}

/* Когда пользователь не аутентифицирован */
body.user-unauthenticated .unauthorized-buttons {
    display: flex !important;
}

body.user-unauthenticated .authorized-buttons {
    display: none !important;
}