/* ============================================
   Стили для страницы авторизации
   ============================================ */

/* Переопределение html и body для страницы авторизации */
html {
    overflow: hidden !important;
    height: 100% !important;
}

body {
    overflow: hidden !important;
    height: 100vh !important;
    max-height: 100vh !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    padding: var(--spacing-md) !important;
}

/* Контейнер авторизации */
.auth-container {
    width: 100%;
    max-width: 440px;
    max-height: 100vh;
    animation: fadeInUp 0.5s ease-out;
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
}

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

/* Карточка авторизации с эффектом glassmorphism */
.auth-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-xl);
    box-shadow: 
        0 20px 25px -5px rgba(0, 0, 0, 0.1),
        0 10px 10px -5px rgba(0, 0, 0, 0.04),
        0 0 0 1px rgba(255, 255, 255, 0.5) inset,
        0 0 60px rgba(99, 102, 241, 0.1);
    padding: var(--spacing-xl);
    width: 100%;
    max-height: calc(100vh - 2rem);
    overflow-y: auto;
    overflow-x: hidden;
    position: relative;
    transition: all var(--transition-slow);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    /* Скрыть скроллбар, но оставить прокрутку */
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE и Edge */
}

.auth-card::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Opera */
}

/* Декоративный градиент на карточке */
.auth-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), #f093fb);
    background-size: 200% 100%;
    animation: shimmer 3s linear infinite;
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

/* Заголовок */
.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    flex-shrink: 0;
}

/* Вкладки */
.tabs {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    background: var(--bg-secondary);
    padding: 0.25rem;
    border-radius: var(--radius-lg);
    flex-shrink: 0;
}

.tab-btn {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    color: var(--primary-color);
    box-shadow: 
        0 2px 4px rgba(99, 102, 241, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    font-weight: 600;
    transform: scale(1.02);
}

/* Формы */
.auth-form {
    display: none;
    animation: fadeIn 0.3s ease-out;
}

.auth-form.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Ссылка для переключения между входом и регистрацией */
.auth-switch {
    text-align: center;
    margin-top: var(--spacing-md);
    flex-shrink: 0;
}

.auth-switch p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.auth-switch a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-base);
    position: relative;
    display: inline-block;
}

.auth-switch a:hover {
    color: var(--primary-hover, #818cf8);
    text-decoration: none;
    transform: translateY(-1px);
}

/* Эффект подчеркивания при наведении через псевдоэлемент */
.auth-switch a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
    transition: width var(--transition-base);
}

.auth-switch a:hover::after {
    width: 100%;
}

/* ============================================
   Адаптивность для страницы авторизации
   ============================================ */

/* Мобильные устройства (360px - 480px) */
@media (max-width: 480px) {
    body {
        padding: var(--spacing-xs) !important;
    }
    
    .auth-container {
        padding: var(--spacing-xs);
        max-height: 100vh;
    }
    
    .auth-card {
        padding: var(--spacing-md);
        border-radius: var(--radius-lg);
        max-height: calc(100vh - 1rem);
    }
    
    .auth-header {
        margin-bottom: var(--spacing-md);
    }
    
    .logo {
        font-size: 1.5rem;
        margin-bottom: 0.25rem;
    }
    
    .subtitle {
        font-size: 0.8125rem;
    }
    
    .tabs {
        margin-bottom: var(--spacing-sm);
        padding: 0.2rem;
    }
    
    .tab-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.875rem;
    }
    
    .form-group {
        margin-bottom: var(--spacing-sm);
    }
    
    .form-group label {
        font-size: 0.8125rem;
        margin-bottom: 0.25rem;
    }
    
    .form-group input {
        padding: 0.625rem var(--spacing-sm);
        font-size: 0.875rem;
    }
    
    .form-options {
        margin-bottom: var(--spacing-sm);
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .btn {
        padding: 0.75rem var(--spacing-sm);
        font-size: 0.875rem;
    }
    
    .divider {
        margin: var(--spacing-sm) 0;
    }
    
    .social-auth {
        gap: var(--spacing-xs);
    }
}

/* Планшеты в портретной ориентации (481px - 768px) */
@media (min-width: 481px) and (max-width: 768px) {
    .auth-container {
        max-width: 420px;
    }
    
    .auth-card {
        padding: var(--spacing-xl);
    }
}

/* Планшеты в альбомной ориентации и небольшие ноутбуки (769px - 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
    .auth-container {
        max-width: 460px;
    }
    
    .auth-card {
        padding: var(--spacing-2xl);
    }
}

/* Десктопы (1025px и выше) */
@media (min-width: 1025px) {
    .auth-container {
        max-width: 480px;
    }
    
    .auth-card {
        padding: var(--spacing-2xl);
    }
    
    .auth-card:hover {
        transform: translateY(-4px) scale(1.01);
        box-shadow: 
            0 25px 50px -12px rgba(0, 0, 0, 0.15),
            0 0 0 1px rgba(255, 255, 255, 0.5) inset,
            0 0 80px rgba(99, 102, 241, 0.2);
        transition: all var(--transition-slow);
    }
}

/* Очень маленькие экраны (менее 360px) */
@media (max-width: 359px) {
    body {
        padding: 0.25rem !important;
    }
    
    .auth-container {
        padding: 0.25rem;
    }
    
    .auth-card {
        padding: var(--spacing-sm);
        max-height: calc(100vh - 0.5rem);
    }
    
    .logo {
        font-size: 1.25rem;
    }
    
    .subtitle {
        font-size: 0.75rem;
    }
    
    .tabs {
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .tab-btn {
        width: 100%;
        padding: var(--spacing-xs);
    }
    
    .form-group {
        margin-bottom: var(--spacing-xs);
    }
    
    .form-group input {
        padding: 0.5rem var(--spacing-xs);
        font-size: 0.8125rem;
    }
    
    .btn {
        padding: 0.625rem var(--spacing-xs);
        font-size: 0.8125rem;
    }
}

/* Низкие экраны - уменьшение отступов */
@media (max-height: 600px) {
    .auth-header {
        margin-bottom: var(--spacing-sm);
    }
    
    .logo {
        font-size: 1.5rem;
        margin-bottom: 0.25rem;
    }
    
    .subtitle {
        font-size: 0.8125rem;
    }
    
    .tabs {
        margin-bottom: var(--spacing-sm);
    }
    
    .form-group {
        margin-bottom: var(--spacing-sm);
    }
    
    .form-options {
        margin-bottom: var(--spacing-sm);
    }
    
    .divider {
        margin: var(--spacing-sm) 0;
    }
}

/* ============================================
   Темная тема для страницы авторизации
   ============================================ */

/* Системная темная тема - только когда нет data-theme="light" */
@media (prefers-color-scheme: dark) {
    html:not([data-theme="light"]) .auth-card {
        background: rgba(31, 41, 55, 0.95);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border: 1px solid rgba(129, 140, 248, 0.2);
        box-shadow: 
            0 20px 25px -5px rgba(0, 0, 0, 0.5),
            0 10px 10px -5px rgba(0, 0, 0, 0.3),
            0 0 0 1px rgba(129, 140, 248, 0.1) inset,
            0 0 60px rgba(129, 140, 248, 0.15);
    }
    
    html:not([data-theme="light"]) .tabs {
        background: rgba(17, 24, 39, 0.8);
    }
    
    html:not([data-theme="light"]) .tab-btn.active {
        background: linear-gradient(135deg, rgba(129, 140, 248, 0.2) 0%, rgba(167, 139, 250, 0.2) 100%);
        color: var(--primary-color);
        box-shadow: 
            0 2px 4px rgba(129, 140, 248, 0.3),
            inset 0 1px 0 rgba(255, 255, 255, 0.1);
    }
    
    @media (min-width: 1025px) {
        html:not([data-theme="light"]) .auth-card:hover {
            box-shadow: 
                0 25px 50px -12px rgba(0, 0, 0, 0.7),
                0 0 0 1px rgba(129, 140, 248, 0.2) inset,
                0 0 80px rgba(129, 140, 248, 0.25);
        }
    }
}

/* Явная темная тема через data-theme="dark" */
html[data-theme="dark"] .auth-card,
html.dark .auth-card {
    background: rgba(31, 41, 55, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(129, 140, 248, 0.2);
    box-shadow: 
        0 20px 25px -5px rgba(0, 0, 0, 0.5),
        0 10px 10px -5px rgba(0, 0, 0, 0.3),
        0 0 0 1px rgba(129, 140, 248, 0.1) inset,
        0 0 60px rgba(129, 140, 248, 0.15);
}

html[data-theme="dark"] .tabs,
html.dark .tabs {
    background: rgba(17, 24, 39, 0.8);
}

html[data-theme="dark"] .tab-btn.active,
html.dark .tab-btn.active {
    background: linear-gradient(135deg, rgba(129, 140, 248, 0.2) 0%, rgba(167, 139, 250, 0.2) 100%);
    color: var(--primary-color);
    box-shadow: 
        0 2px 4px rgba(129, 140, 248, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

@media (min-width: 1025px) {
    html[data-theme="dark"] .auth-card:hover,
    html.dark .auth-card:hover {
        box-shadow: 
            0 25px 50px -12px rgba(0, 0, 0, 0.7),
            0 0 0 1px rgba(129, 140, 248, 0.2) inset,
            0 0 80px rgba(129, 140, 248, 0.25);
    }
}

/* Явная светлая тема через data-theme="light" */
html[data-theme="light"] .auth-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 
        0 20px 25px -5px rgba(0, 0, 0, 0.1),
        0 10px 10px -5px rgba(0, 0, 0, 0.04),
        0 0 0 1px rgba(255, 255, 255, 0.5) inset,
        0 0 60px rgba(99, 102, 241, 0.1);
}

html[data-theme="light"] .tabs {
    background: var(--bg-secondary);
}

html[data-theme="light"] .tab-btn.active {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    color: var(--primary-color);
    box-shadow: 
        0 2px 4px rgba(99, 102, 241, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
}