/* ===================================
   LOGIN & REGISTER - CSS STYLES
   ================================== */

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

:root {
    /* Color Palette */
    --primary-color: #3B82F6;
    --primary-dark: #1E40AF;
    --primary-light: #DBEAFE;
    --secondary-color: #10B981;
    --danger-color: #EF4444;
    --warning-color: #F59E0B;
    --success-color: #10B981;
    
    /* Neutral Colors */
    --white: #FFFFFF;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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);
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--gray-800);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-4);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Auth Container */
.auth-container {
    width: 100%;
    max-width: 400px;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Auth Card */
.auth-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-12);
    width: 100%;
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Header */
.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-8);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
}

.logo i {
    font-size: var(--font-size-3xl);
    color: var(--primary-color);
}

.logo h1 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--gray-800);
}

.auth-subtitle {
    color: var(--gray-600);
    font-size: var(--font-size-base);
}

/* Form Styles */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.form-group label {
    font-weight: 500;
    color: var(--gray-700);
    font-size: var(--font-size-sm);
}

.input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.input-group input {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    padding-left: 2.5rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: all 0.2s;
    background-color: var(--white);
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.input-icon {
    position: absolute;
    left: 0.75rem;
    color: var(--gray-400);
    font-size: var(--font-size-sm);
    z-index: 1;
}

.password-toggle {
    position: absolute;
    right: 0.75rem;
    background: none;
    border: none;
    color: var(--gray-400);
    cursor: pointer;
    padding: var(--spacing-1);
    border-radius: var(--radius-sm);
    transition: color 0.2s;
    z-index: 2;
}

.password-toggle:hover {
    color: var(--gray-600);
}

.password-toggle:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Form Options */
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-4);
    font-size: var(--font-size-sm);
}

.checkbox-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    cursor: pointer;
    user-select: none;
}

.checkbox-container input[type="checkbox"] {
    appearance: none;
    width: 1rem;
    height: 1rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    background: var(--white);
    cursor: pointer;
    position: relative;
    transition: all 0.2s;
}

.checkbox-container input[type="checkbox"]:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-container input[type="checkbox"]:checked::after {
    content: '✓';
    position: absolute;
    top: -1px;
    left: 1px;
    color: var(--white);
    font-size: 0.75rem;
    font-weight: bold;
}

.forgot-password {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.forgot-password:hover {
    text-decoration: underline;
}

.terms-link {
    color: var(--primary-color);
    text-decoration: none;
}

.terms-link:hover {
    text-decoration: underline;
}

/* Button */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

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

/* Auth Divider */
.auth-divider {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    margin: var(--spacing-2) 0;
    text-align: center;
    color: var(--gray-500);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--gray-300);
}

.auth-divider span {
    padding: 0 var(--spacing-2);
    background: var(--white);
}

/* Auth Footer */
.auth-footer {
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--gray-600);
}

.auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-overlay.active {
    display: flex;
}

.loading-spinner {
    background: var(--white);
    padding: var(--spacing-8);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.loading-spinner i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-4);
    display: block;
}

.loading-spinner p {
    color: var(--gray-600);
    font-weight: 500;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: var(--spacing-4);
    right: var(--spacing-4);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.toast {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: var(--spacing-4);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid;
    max-width: 350px;
    animation: slideInRight 0.3s ease-out;
    cursor: pointer;
}

.toast.success {
    border-left-color: var(--success-color);
}

.toast.error {
    border-left-color: var(--danger-color);
}

.toast.warning {
    border-left-color: var(--warning-color);
}

.toast.info {
    border-left-color: var(--primary-color);
}

.toast-title {
    font-weight: 600;
    margin-bottom: var(--spacing-1);
    color: var(--gray-800);
}

.toast-message {
    color: var(--gray-600);
    font-size: var(--font-size-sm);
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Responsive Design */
@media (max-width: 480px) {
    body {
        padding: var(--spacing-2);
    }
    
    .auth-card {
        padding: var(--spacing-6);
    }
    
    .auth-container {
        max-width: 100%;
    }
    
    .form-options {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-3);
    }
    
    .toast-container {
        left: var(--spacing-4);
        right: var(--spacing-4);
    }
    
    .toast {
        max-width: none;
    }
    
    .logo {
        flex-direction: column;
        gap: var(--spacing-2);
    }
    
    .logo h1 {
        font-size: var(--font-size-lg);
    }
}

/* Focus Styles for Accessibility */
input:focus,
button:focus,
a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Error States */
.form-group.error input {
    border-color: var(--danger-color);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.error-message {
    color: var(--danger-color);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-1);
}

/* Success States */
.form-group.success input {
    border-color: var(--success-color);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}