/* ===== СТИЛИ СТРАНИЦЫ ВХОДА ===== */

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
}

.login-container::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="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    pointer-events: none;
}

.login-card {
    background: var(--surface-color);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    padding: 0;
    width: 100%;
    max-width: 400px;
    position: relative;
    overflow: hidden;
}

.login-header {
    text-align: center;
    padding: 2rem 2rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--text-inverse);
    position: relative;
}

.login-header::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 20px;
    background: var(--surface-color);
    border-radius: 20px 20px 0 0;
}

.logo {
    margin-bottom: 1rem;
    display: flex;
    justify-content: center;
}

.logo-icon {
    color: var(--text-inverse);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.login-header h1 {
    font-size: 1.875rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: 0.5rem;
    color: var(--text-inverse);
}

.brand-logo {
    text-align: center;
    margin-bottom: 1.5rem;
}

.brand-title {
    font-size: 2.2rem;
    font-weight: 700;
    background: linear-gradient(135deg, #ffffff 0%, #f0f0f0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
    letter-spacing: -0.02em;
    position: relative;
}

.brand-title::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: linear-gradient(135deg, #ffffff 0%, #f0f0f0 100%);
    border-radius: 2px;
}

.subtitle {
    font-size: 1rem;
    opacity: 0.9;
    margin: 0;
    color: var(--text-inverse);
}

.login-form {
    padding: 2rem;
}

.login-form .form-group {
    margin-bottom: 1.5rem;
}

.login-form label {
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    display: block;
}

.login-form input {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--surface-color);
    transition: var(--transition);
    outline: none;
}

.login-form input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.login-form input::placeholder {
    color: var(--text-muted);
}

.form-actions {
    margin-top: 2rem;
}

.login-form .btn-primary {
    width: 100%;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    position: relative;
    overflow: hidden;
}

.login-form .btn-primary:disabled {
    background-color: var(--text-muted);
    border-color: var(--text-muted);
    cursor: not-allowed;
}

.btn-text {
    transition: var(--transition);
}

.login-form .btn-primary:disabled .btn-text {
    opacity: 0;
}

.login-form .btn-primary:disabled .loading-spinner {
    display: block !important;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid var(--text-inverse);
}

.error-message {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem;
    margin-top: 1.5rem;
    background-color: rgba(220, 38, 38, 0.05);
    border: 1px solid rgba(220, 38, 38, 0.2);
    border-radius: var(--border-radius);
    color: var(--error-color);
    font-size: 0.875rem;
    line-height: 1.4;
}

.error-icon {
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.error-text {
    flex: 1;
}

.login-footer {
    text-align: center;
    padding: 1rem 2rem 2rem;
    color: var(--text-muted);
}

.version {
    font-size: 0.875rem;
    margin: 0;
}

/* ===== АНИМАЦИИ ===== */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-card {
    animation: slideIn 0.3s ease-out;
}

.login-form .form-group {
    animation: slideIn 0.3s ease-out;
    animation-fill-mode: both;
}

.login-form .form-group:nth-child(1) { animation-delay: 0.1s; }
.login-form .form-group:nth-child(2) { animation-delay: 0.2s; }
.form-actions { animation: slideIn 0.3s ease-out 0.3s both; }

/* ===== СОСТОЯНИЯ ПОЛЕЙ ===== */
.login-form input:invalid:not(:placeholder-shown) {
    border-color: var(--error-color);
}

.login-form input:valid:not(:placeholder-shown) {
    border-color: var(--success-color);
}

/* ===== ЭФФЕКТЫ НАВЕДЕНИЯ ===== */
.login-form input:hover:not(:focus) {
    border-color: var(--border-hover);
}

.login-card:hover {
    box-shadow: 0 25px 30px -5px rgba(0, 0, 0, 0.15), 0 15px 15px -5px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
    transition: var(--transition-slow);
}

/* ===== АДАПТИВНОСТЬ ===== */
@media (max-width: 480px) {
    .login-container {
        padding: 0.5rem;
        align-items: flex-start;
        padding-top: 2rem;
    }
    
    .login-card {
        margin: 0;
        border-radius: var(--border-radius);
    }
    
    .login-header {
        padding: 1.5rem 1.5rem 1rem;
    }
    
    .login-header h1 {
        font-size: 1.5rem;
    }
    
    .login-form {
        padding: 1.5rem;
    }
    
    .login-footer {
        padding: 1rem 1.5rem 1.5rem;
    }
    
    .logo-icon {
        width: 40px;
        height: 40px;
    }
}

/* ===== ТЕМНАЯ ТЕМА (будущее расширение) ===== */
@media (prefers-color-scheme: dark) {
    .login-container {
        background: linear-gradient(135deg, #1e3a8a 0%, #581c87 100%);
    }
}

/* ===== СОСТОЯНИЕ ЗАГРУЗКИ ===== */
.login-form.loading {
    pointer-events: none;
}

.login-form.loading input {
    opacity: 0.7;
}

/* ===== АНИМАЦИЯ ОШИБКИ ===== */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-4px); }
    20%, 40%, 60%, 80% { transform: translateX(4px); }
}

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

/* ===== УЛУЧШЕННЫЕ СОСТОЯНИЯ ===== */
.form-group.has-error input {
    border-color: var(--error-color);
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-group.has-success input {
    border-color: var(--success-color);
    box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.1);
}

/* ===== RESPONSIVE DESIGN - TABLETS ===== */
@media (min-width: 768px) {
    .login-container {
        padding: 2rem;
    }
    
    .login-card {
        max-width: 450px;
        margin: 2rem auto;
    }
    
    .login-header {
        padding: 2.5rem 2.5rem 2rem;
    }
    
    .login-header h1 {
        font-size: 2.25rem;
        margin-bottom: 0.75rem;
    }
    
    .subtitle {
        font-size: 1.125rem;
    }
    
    .logo-icon {
        width: 56px;
        height: 56px;
    }
    
    .login-form {
        padding: 2.5rem;
    }
    
    .login-form .form-group {
        margin-bottom: 2rem;
    }
    
    .login-form input {
        padding: 1rem 1.25rem;
        font-size: 1.125rem;
    }
    
    .login-form .btn-primary {
        padding: 1rem 2rem;
        font-size: 1.125rem;
    }
    
    .login-footer {
        padding: 1.5rem 2.5rem 2.5rem;
    }
}

/* ===== RESPONSIVE DESIGN - DESKTOP ===== */
@media (min-width: 1024px) {
    .login-container {
        padding: 3rem;
        min-height: 100vh;
        align-items: center;
        justify-content: center;
    }
    
    .login-card {
        max-width: 500px;
        margin: 0 auto;
        box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    }
    
    .login-header {
        padding: 3rem 3rem 2.5rem;
    }
    
    .login-header h1 {
        font-size: 2.5rem;
        margin-bottom: 1rem;
        letter-spacing: -0.025em;
    }
    
    .subtitle {
        font-size: 1.25rem;
    }
    
    .logo-icon {
        width: 64px;
        height: 64px;
    }
    
    .login-form {
        padding: 3rem;
    }
    
    .login-form .form-group {
        margin-bottom: 2.5rem;
    }
    
    .login-form label {
        font-size: 1.125rem;
        margin-bottom: 0.75rem;
    }
    
    .login-form input {
        padding: 1.125rem 1.5rem;
        font-size: 1.125rem;
        border-radius: var(--border-radius-lg);
    }
    
    .form-actions {
        margin-top: 2.5rem;
    }
    
    .login-form .btn-primary {
        padding: 1.125rem 2.5rem;
        font-size: 1.25rem;
        border-radius: var(--border-radius-lg);
    }
    
    .error-message {
        margin-top: 2rem;
        padding: 1.25rem;
        font-size: 1rem;
    }
    
    .login-footer {
        padding: 2rem 3rem 3rem;
    }
    
    /* Enhanced hover effects for desktop */
    .login-form input:hover:not(:focus) {
        transform: translateY(-1px);
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    }
    
    .login-form .btn-primary:hover:not(:disabled) {
        transform: translateY(-2px);
        box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
    }
}