/* ========================================
   Глобальные стили
   ======================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   Кастомные переменные CSS
   ======================================== */

:root {
    --primary-color: #3b82f6;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --text-primary: #ffffff;
    --text-secondary: #f1f5f9;
    --text-muted: #cbd5e1;
    --text-dark: #1e293b;
    --text-dark-secondary: #475569;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-dark: #0f172a;
    --bg-dark-secondary: #1e293b;
    --bg-footer: #3b82f6;
    --border-color: #e2e8f0;
    --border-dark: #334155;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-dark: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
}

/* ========================================
   Кастомные анимации
   ======================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* Применяем анимацию к формам */
form {
    animation: fadeIn 0.3s ease-out;
}

/* ========================================
   Кастомные стили для кнопок
   ======================================== */

.btn-custom {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.btn-custom::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-custom:hover::before {
    width: 300px;
    height: 300px;
}

/* ========================================
   Кастомные стили для инпутов
   ======================================== */

input[type="text"],
input[type="email"],
input[type="password"] {
    transition: all 0.2s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Плейсхолдер стили */
input::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

/* ========================================
   Кастомный скроллбар
   ======================================== */

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* ========================================
   Gradient backgrounds
   ======================================== */

.gradient-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.gradient-secondary {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.gradient-success {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

/* ========================================
   Карточки с эффектом стекла (glassmorphism)
   ======================================== */

.glass-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
}

/* ========================================
   Hover эффекты
   ======================================== */

.hover-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* ========================================
   Состояние загрузки
   ======================================== */

.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.6;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid transparent;
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ========================================
   Уведомления / Alerts
   ======================================== */

.alert {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    animation: slideIn 0.3s ease-out;
}

.alert-success {
    background-color: #d1fae5;
    border-left: 4px solid var(--success-color);
    color: #065f46;
}

.alert-error {
    background-color: #fee2e2;
    border-left: 4px solid var(--danger-color);
    color: #991b1b;
}

.alert-warning {
    background-color: #fef3c7;
    border-left: 4px solid var(--warning-color);
    color: #92400e;
}

.alert-info {
    background-color: #dbeafe;
    border-left: 4px solid var(--primary-color);
    color: #1e40af;
}

/* ========================================
   Badges
   ======================================== */

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
    border-radius: 9999px;
    text-align: center;
    white-space: nowrap;
}

.badge-primary {
    background-color: var(--primary-color);
    color: white;
}

.badge-success {
    background-color: var(--success-color);
    color: white;
}

.badge-danger {
    background-color: var(--danger-color);
    color: white;
}

/* ========================================
   Темная тема (опционально)
   ======================================== */

@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #1f2937;
        --text-secondary: #374151;
        --bg-primary: #1f2937;
        --bg-secondary: #111827;
        --border-color: #374151;
    }

    body {
        background-color: var(--bg-primary);
        color: var(--text-primary);
    }
}

/* ========================================
   Утилиты
   ======================================== */

.text-shadow {
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.no-select {
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.truncate-2-lines {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ========================================
   Адаптивность
   ======================================== */

@media (max-width: 640px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

/* ========================================
   Кастомные классы для ваших страниц
   ======================================== */

/* Пример: Стилизация страницы логина */
.login-page {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* Пример: Стилизация карточки профиля */
.profile-card {
    transition: all 0.3s ease;
}

.profile-card:hover {
    transform: scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}