/* ===== CSS Variables for Login Theme Colors ===== */
:root {
    --primary-color: #5c3a56;
    --primary-dark: #4a2f45;
    --primary-light: #7a4f72;
    --secondary-color: #c0b79a;
    --secondary-dark: #a8a085;
    --secondary-light: #d4ccb0;
    --text-primary: #2c3e50;
    --text-secondary: #6c757d;
    --text-muted: #95a5a6;
    --background-light: #f8f9fa;
    --background-white: #ffffff;
    --border-color: #e9ecef;
    --border-focus: var(--secondary-color);
    --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 20px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

/* ===== Global Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    color: var(--text-primary);
    line-height: 1.6;
}

/* ===== Login Container ===== */
.login-container {
    width: 100%;
    max-width: 450px;
    margin: 0 auto;
}

.login-card {
    background: var(--background-white);
    border-radius: 16px;
    box-shadow: var(--shadow-medium);
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
}

.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

/* ===== Logo Section ===== */
.logo-section {
    text-align: center;
    margin-bottom: 2rem;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo i {
    font-size: 2rem;
    color: var(--secondary-color);
}

.welcome-text {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 0;
}

/* ===== Form Styles ===== */
.login-form {
    margin-bottom: 2rem;
}

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

.form-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.form-label i {
    color: var(--secondary-color);
    font-size: 0.85rem;
}

.form-control {
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    transition: var(--transition);
    background: var(--background-white);
}

.form-control:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 0.2rem rgba(192, 183, 154, 0.25);
    outline: none;
}

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

/* ===== Password Input Group ===== */
.password-input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.password-input-group .form-control {
    padding-right: 3rem;
}

.password-toggle {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    transition: var(--transition);
}

.password-toggle:hover {
    color: var(--secondary-color);
}

.password-toggle:focus {
    outline: none;
    color: var(--secondary-color);
}

/* ===== Form Options ===== */
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-check-input {
    width: 1.2rem;
    height: 1.2rem;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.form-check-input:focus {
    box-shadow: 0 0 0 0.2rem rgba(92, 58, 86, 0.25);
}

.form-check-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.forgot-password {
    color: var(--secondary-color);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.forgot-password:hover {
    color: var(--secondary-dark);
    text-decoration: underline;
}

/* ===== Login Button ===== */
.login-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border: none;
    border-radius: 8px;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.login-btn:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    transform: translateY(-1px);
    box-shadow: var(--shadow-light);
}

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

.login-btn:focus {
    box-shadow: 0 0 0 0.2rem rgba(92, 58, 86, 0.25);
    outline: none;
}

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

/* ===== Divider ===== */
.divider {
    text-align: center;
    margin: 2rem 0;
    position: relative;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border-color);
}

.divider span {
    background: var(--background-white);
    padding: 0 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    position: relative;
    z-index: 1;
}

/* ===== Social Login ===== */
.social-login {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--background-white);
    color: var(--text-primary);
    font-weight: 500;
    transition: var(--transition);
    text-decoration: none;
}

.social-btn:hover {
    border-color: var(--secondary-color);
    background: var(--background-light);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.social-btn:focus {
    box-shadow: 0 0 0 0.2rem rgba(192, 183, 154, 0.25);
    outline: none;
}

.social-btn i {
    font-size: 1.1rem;
}

/* ===== Login Footer ===== */
.login-footer {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.login-footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

.signup-link {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.signup-link:hover {
    color: var(--secondary-dark);
    text-decoration: underline;
}

/* ===== Validation Styles ===== */
.form-control.is-invalid {
    border-color: #dc3545;
}

.form-control.is-invalid:focus {
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

.invalid-feedback {
    display: block;
    color: #dc3545;
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

/* ===== Loading State ===== */
.login-btn.loading {
    pointer-events: none;
}

.login-btn.loading::after {
    content: '';
    position: absolute;
    width: 1rem;
    height: 1rem;
    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); }
}

/* ===== Responsive Design ===== */
@media (max-width: 576px) {
    .login-card {
        padding: 2rem 1.5rem;
        margin: 1rem;
    }
    
    .logo {
        font-size: 1.25rem;
    }
    
    .logo i {
        font-size: 1.5rem;
    }
    
    .form-options {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
    
    .social-login {
        gap: 0.5rem;
    }
    
    .social-btn {
        padding: 0.625rem 1rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .login-card {
        padding: 1.5rem 1rem;
    }
    
    .welcome-text {
        font-size: 0.9rem;
    }
    
    .form-label {
        font-size: 0.85rem;
    }
    
    .form-control {
        font-size: 0.9rem;
        padding: 0.625rem 0.875rem;
    }
}

/* ===== Accessibility ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== Focus Styles for Keyboard Navigation ===== */
.form-control:focus,
.password-toggle:focus,
.login-btn:focus,
.social-btn:focus,
.forgot-password:focus,
.signup-link:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

/* ===== High Contrast Mode Support ===== */
@media (prefers-contrast: high) {
    .login-card {
        border: 2px solid var(--text-primary);
    }
    
    .form-control {
        border-width: 2px;
    }
    
    .login-btn {
        border: 2px solid white;
    }
}