:root {
    --dark-bg: #1a1a1a;
    --dark-card: #2d2d2d;
    --dark-text: #e0e0e0;
    --accent-red: #c62828;
    --accent-light: #ff5252;
    --border-color: #404040;
    --input-bg: #3a3a3a;
    --error-color: #f44336;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--dark-bg);
    color: var(--dark-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    background-color: var(--dark-card);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 420px;
    border: 1px solid var(--border-color);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.logo {
    font-size: 32px;
    font-weight: bold;
    color: var(--accent-red);
    margin-bottom: 20px;
}

.login-header h1 {
    font-size: 24px;
    margin-bottom: 8px;
    font-weight: 600;
}

.login-header p {
    color: #aaa;
    font-size: 14px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-group {
    display: flex;
    flex-direction: column;
}

.input-group label {
    margin-bottom: 8px;
    font-weight: 500;
    color: #ccc;
    font-size: 14px;
}

.input-group input {
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px 16px;
    color: var(--dark-text);
    font-size: 16px;
    transition: all 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent-red);
    box-shadow: 0 0 0 2px rgba(198, 40, 40, 0.2);
}

.input-group input:hover {
    border-color: #555;
}

.login-btn {
    background-color: var(--accent-red);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 14px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-btn:hover {
    background-color: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(198, 40, 40, 0.3);
}

.login-btn:active {
    transform: translateY(0);
}

.login-btn:disabled {
    background-color: #666;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.hidden {
    display: none !important;
}

.error-message {
    background-color: rgba(244, 67, 54, 0.1);
    border: 1px solid var(--error-color);
    color: var(--error-color);
    padding: 12px;
    border-radius: 6px;
    text-align: center;
    font-size: 14px;
    margin-top: 10px;
}

.login-footer {
    text-align: center;
    margin-top: 25px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.login-footer p {
    color: #aaa;
    font-size: 14px;
}

.register-link {
    color: var(--accent-red);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.register-link:hover {
    color: var(--accent-light);
    text-decoration: underline;
}

/* Анимации */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.shake {
    animation: shake 0.5s ease-in-out;
}

/* Адаптивность */
@media (max-width: 480px) {
    .login-container {
        padding: 30px 25px;
        margin: 10px;
    }
    
    .logo {
        font-size: 28px;
    }
    
    .login-header h1 {
        font-size: 22px;
    }
}