/*     
    Separate CSS for the login page
    Reuse variables from app.css to avoid duplication
    Inspired by RED contact page structure
*/

/* Login Section */
.login-section {
    width: 100%;
    max-width: 500px;
}

/* Login Card */
.login-card {
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    position: relative;
}

/* Login Card Header */
.login-card-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: var(--space-6) 0;
    position: relative;
    overflow: hidden;
}

.login-card-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shimmer 3s infinite;
}

.login-title {
    color: var(--color-white);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    text-align: center;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    position: relative;
    z-index: 1;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* Login Form */
.login-form {
    padding: var(--space-10) var(--space-8);
    background-color: var(--color-white);
}

/* Form Field */
.form-field {
    margin-bottom: var(--space-6);
}

.form-label {
    display: block;
    color: var(--color-black);
    font-weight: 600;
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-2);
}

.form-input {
    width: 100%;
    padding: var(--space-4) var(--space-4);
    border: 2px solid var(--color-neutral-300);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-family: inherit;
    background-color: var(--color-white);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
    -webkit-appearance: none;
    appearance: none;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(230, 0, 18, 0.1);
    transform: translateY(-1px);
}

.form-input:invalid:focus {
    box-shadow: 0 0 0 3px rgba(230, 0, 18, 0.2);
}

/* Field Error */
.field-error {
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    margin-top: var(--space-1);
    min-height: var(--space-5);
}

/* Form Field Error State */
.form-field.error .form-input {
    border-color: var(--color-primary);
}

.form-field.error .form-label {
    color: var(--color-primary);
}

/* Form Error */
.form-error {
    background-color: var(--color-primary-lighter);
    color: var(--color-primary-darker);
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--color-primary-light);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    text-align: center;
    margin-bottom: var(--space-5);
    animation: shake 0.5s ease-in-out;
}

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

/* Login Button */
.login-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    border: none;
    padding: var(--space-4) var(--space-6);
    font-size: var(--font-size-base);
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-primary);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    min-height: 48px;
    -webkit-tap-highlight-color: transparent;
}

.login-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-slow);
}

.login-btn:hover {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary-darker) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(230, 0, 18, 0.4);
}

.login-btn:hover::before {
    left: 100%;
}

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

.login-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.login-btn:disabled:hover {
    transform: none;
    box-shadow: var(--shadow-primary);
}

/* Button Icon */
.btn-icon {
    font-size: var(--font-size-lg);
    font-weight: bold;
}

/* Button Spinner */
.btn-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: none;
}

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

/* Loading States */
.login-btn.loading .loginBtnText {
    display: none;
}

.login-btn.loading .btn-spinner {
    display: block;
}

/* Hide icon while loading so only spinner is visible */
.login-btn.loading .btn-icon {
    display: none;
}

/* iPad Responsive Styles cho Login */
@media (min-width: 768px) and (max-width: 1024px) {
    .login-section {
        max-width: 600px;
    }
    
    .login-form {
        padding: var(--space-12) var(--space-10);
    }
    
    .form-input {
        padding: var(--space-5) var(--space-5);
        font-size: var(--font-size-lg);
        min-height: 56px;
    }
    
    .login-btn {
        padding: var(--space-5) var(--space-8);
        font-size: var(--font-size-lg);
        min-height: 56px;
    }
    
    .login-title {
        font-size: var(--font-size-3xl);
    }
    
    /* Better touch targets for iPad */
    .form-input,
    .login-btn {
        min-height: 56px;
    }
    
    /* Improved spacing for iPad landscape */
    .form-field {
        margin-bottom: var(--space-8);
    }
}

/* iPad Pro Styles cho Login */
@media (min-width: 1024px) and (max-width: 1366px) {
    .login-section {
        max-width: 700px;
    }
    
    .login-form {
        padding: var(--space-16) var(--space-12);
    }
    
    .form-input {
        padding: var(--space-6) var(--space-6);
        font-size: var(--font-size-xl);
        min-height: 64px;
    }
    
    .login-btn {
        padding: var(--space-6) var(--space-10);
        font-size: var(--font-size-xl);
        min-height: 64px;
    }
    
    .login-title {
        font-size: var(--font-size-4xl);
    }
}

/* iPad Landscape Orientation cho Login */
@media (min-width: 768px) and (max-width: 1024px) and (orientation: landscape) {
    .login-section {
        max-width: 500px;
    }
    
    .login-form {
        padding: var(--space-8) var(--space-6);
    }
}

/* iPad Optimized Styles */
.ipad-optimized .form-input {
    -webkit-appearance: none;
    appearance: none;
    border-radius: var(--radius-lg);
}

.ipad-optimized .login-btn {
    -webkit-appearance: none;
    appearance: none;
    border-radius: var(--radius-lg);
}

/* Touch feedback for iPad */
.ipad-optimized .form-input:active {
    transform: scale(0.98);
    transition: transform 0.1s ease;
}

.ipad-optimized .login-btn:active {
    transform: scale(0.95);
    transition: transform 0.1s ease;
}

/* Prevent text selection on interactive elements */
.ipad-optimized .login-btn,
.ipad-optimized .form-input {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* Better focus states for iPad */
.ipad-optimized .form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(230, 0, 18, 0.15);
    transform: none;
}

/* Reduced Motion cho Login */
@media (prefers-reduced-motion: reduce) {
    .login-card-header::before {
        animation: none;
    }
    
    .login-btn::before {
        transition: none;
    }
}