/* ========== ПЕРЕМЕННЫЕ ========== */
:root {
    /* Светлая тема */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --border: #e2e8f0;
    --card-shadow: 0 1px 3px rgba(0,0,0,0.1);
    --sidebar-bg: #ffffff;
    --nav-hover: #f1f5f9;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --danger: #ef4444;
    --success: #10b981;
    --warning: #f59e0b;
    --table-header: #f8fafc;
}

[data-theme="dark"] {
    /* Темная тема */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border: #334155;
    --card-shadow: 0 1px 3px rgba(0,0,0,0.3);
    --sidebar-bg: #1e293b;
    --nav-hover: #334155;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --danger: #f87171;
    --success: #34d399;
    --warning: #fbbf24;
    --table-header: #1e293b;
}

/* ========== БАЗОВЫЕ СТИЛИ ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: background 0.3s, color 0.3s;
}

/* ========== СТРАНИЦА ВХОДА ========== */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-card {
    background: var(--bg-secondary);
    padding: 48px;
    border-radius: 24px;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
    width: 440px;
}

.login-card h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-card .subtitle {
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 14px;
}

.input-group {
    margin-bottom: 24px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 14px;
}

.input-group input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.2s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}

button[type="submit"] {
    width: 100%;
    padding: 12px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

button[type="submit"]:hover {
    background: var(--accent-hover);
}

.error-message {
    color: var(--danger);
    margin-top: 16px;
    text-align: center;
    font-size: 14px;
}

/* ========== САЙДБАР ========== */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 280px;
    height: 100vh;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transition: left 0.3s ease;
}

.sidebar-header {
    padding: 32px 24px;
    border-bottom: 1px solid var(--border);
}

.sidebar-header h2 {
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar-header p {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.sidebar-nav {
    flex: 1;
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nav-btn {
    width: 100%;
    padding: 12px 16px;
    background: transparent;
    border: none;
    border-radius: 12px;
    color: var(--text-secondary);
    text-align: left;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 12px;
}

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

.nav-btn.active {
    background: var(--accent);
    color: white;
}

.nav-btn.active .nav-icon {
    color: white;
}

.nav-icon {
    font-size: 18px;
    width: 24px;
}

.sidebar-footer {
    padding: 24px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: var(--bg-primary);
    border-radius: 12px;
    margin-bottom: 12px;
}

.theme-toggle span {
    font-size: 14px;
    color: var(--text-secondary);
}

.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border);
    transition: 0.3s;
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: 0.3s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--accent);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.logout-btn {
    width: 100%;
    padding: 10px;
    background: transparent;
    color: var(--danger);
    border: 1px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.logout-btn:hover {
    background: var(--danger);
    color: white;
    border-color: var(--danger);
}

/* ========== ОСНОВНОЙ КОНТЕНТ ========== */
.main-content {
    margin-left: 280px;
    padding: 32px;
    min-height: 100vh;
}