/* ===== CSS Variables ===== */
:root {
    --color-indigo-dark: #1a1f3a;
    --color-indigo: #2d3561;
    --color-indigo-light: #3d4a7a;
    --color-emerald: #10b981;
    --color-emerald-dark: #059669;
    --color-red: #ef4444;
    --color-white: #ffffff;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-900: #111827;
    
    --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    --transition-base: 0.3s ease;
}

/* ===== Reset & Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, var(--color-indigo-dark) 0%, var(--color-indigo) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

/* ===== Login Container ===== */
.login-container {
    width: 100%;
    max-width: 420px;
    animation: fadeInDown 0.6s ease;
}

.login-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-xl);
}

/* ===== Login Header ===== */
.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.logo-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.logo-top-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: nowrap;
}

.logo-icon-wrapper {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    background: #2d3561;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
}

.logo-icon {
    width: 100%;
    height: 100%;
    display: block;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
    /* Фильтр для изменения цвета на белый */
    filter: brightness(0) invert(1);
}

.login-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-indigo);
    margin: 0;
    line-height: 1.2;
    white-space: nowrap;
    font-family: var(--font-family);
}

.login-subtitle {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    margin: 0;
    font-weight: 400;
    white-space: nowrap;
    line-height: 1.2;
    font-family: var(--font-family);
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

/* ===== Login Form ===== */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-gray-700);
}

.form-group input {
    padding: 0.875rem 1rem;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 1rem;
    color: var(--color-gray-900);
    transition: all var(--transition-base);
    background: var(--color-white);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-indigo);
    box-shadow: 0 0 0 3px rgba(45, 53, 97, 0.1);
}

.form-group input::placeholder {
    color: var(--color-gray-400);
}

/* ===== Remember Me Checkbox ===== */
.remember-me-group {
    margin-top: -0.5rem;
}

.remember-me-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--color-gray-700);
}

.remember-me-label input[type="checkbox"] {
    width: 1.125rem;
    height: 1.125rem;
    cursor: pointer;
    accent-color: var(--color-indigo);
    flex-shrink: 0;
}

.remember-me-label span {
    line-height: 1.5;
}

.remember-me-label:hover {
    color: var(--color-indigo);
}

/* ===== Error Message ===== */
.error-message {
    background: #fee2e2;
    border: 1px solid var(--color-red);
    color: var(--color-red);
    padding: 0.875rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
}

/* ===== Login Button ===== */
.btn-login {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--color-indigo) 0%, var(--color-indigo-dark) 100%);
    color: var(--color-white);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-login:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-loader {
    animation: spin 1s linear infinite;
}

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

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* ===== Responsive ===== */
@media (max-width: 480px) {
    .login-card {
        padding: 2rem 1.5rem;
    }
    
    .logo-top-row {
        gap: 0.5rem;
    }
    
    .logo-icon-wrapper {
        width: 40px;
        height: 40px;
        padding: 8px;
    }
    
    .login-title {
        font-size: 1.5rem;
    }
    
    .login-subtitle {
        font-size: 0.75rem;
    }
}

@media (max-width: 360px) {
    .login-title {
        font-size: 1.25rem;
    }
    
    .login-subtitle {
        font-size: 0.7rem;
    }
    
    .logo-icon-wrapper {
        width: 36px;
        height: 36px;
        padding: 7px;
    }
}