:root {
    --primary-color: #043d7c;
    --primary-light: rgba(4, 61, 124, 0.08);
    --primary-dark: #032c59;
    --secondary-color: #3068cc;
    --neutral-text: #334155;
    --neutral-light: #f1f5f9;
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --duration-fast: 150ms;
    --duration-normal: 300ms;
    --duration-slow: 500ms;
}

/* Modern CSS Reset */
*, *::before, *::after {
    box-sizing: border-box;
}

* {
    margin: 0;
    padding: 0;
}

html {
    height: 100%;
}

body {
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--gray-50);
    color: var(--neutral-text);
    display: flex;
    flex-direction: column;
}

/* Main Container - Split Screen Design */
.main-content {
    flex: 1;
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg) 0;
}

.register-container {
    display: flex;
    max-width: 1100px;
    width: 100%;
    min-height: 650px;
    background: var(--white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    margin: 0 var(--space-lg);
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Left Side - Welcome Section */
.register-welcome {
    flex: 1;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: var(--space-3xl);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    min-height: 650px;
}

.register-welcome::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 1000 1000"><defs><pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.6;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.welcome-content {
    position: relative;
    z-index: 2;
    color: var(--white);
}

.welcome-logo {
    margin-bottom: var(--space-xl);
}

.welcome-logo img {
    height: 60px;
    border-radius: var(--radius-md);
}

.welcome-title {
    font-size: var(--text-4xl);
    font-weight: 700;
    margin-bottom: var(--space-lg);
    line-height: 1.2;
}

.welcome-subtitle {
    font-size: var(--text-lg);
    opacity: 0.9;
    margin-bottom: var(--space-xl);
    line-height: 1.6;
}

.welcome-features {
    list-style: none;
    padding: 0;
}

.welcome-features li {
    display: flex;
    align-items: center;
    margin-bottom: var(--space-md);
    font-size: var(--text-base);
    opacity: 0.9;
}

.welcome-features li i {
    margin-right: var(--space-md);
    width: 20px;
    color: rgba(255, 255, 255, 0.8);
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Right Side - Register Form */
.register-form-section {
    flex: 1;
    padding: var(--space-3xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: var(--white);
    position: relative;
}

.form-header {
    text-align: center;
    margin-bottom: var(--space-sm);
}

.form-header h2 {
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--space-sm);
}

.form-header p {
    color: var(--gray-600);
    font-size: var(--text-base);
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--space-sm);
    font-size: var(--text-sm);
    display: block;
}

.form-control {
    width: 100%;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-md) var(--space-md);
    font-size: var(--text-base);
    transition: all var(--duration-fast) ease;
    background: var(--white);
    color: var(--neutral-text);
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
}

.form-control:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 4px var(--primary-light);
    outline: none;
    background: var(--white);
}

.form-control::placeholder {
    color: var(--gray-400);
    opacity: 1;
}

.input-group {
    position: relative;
    display: flex;
    width: 100%;
}

.toggle-password,
.toggle-confirm-password {
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-left: none;
    color: var(--gray-500);
    padding: var(--space-md);
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    transition: all var(--duration-fast) ease;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 50px;
}

.toggle-password:hover,
.toggle-confirm-password:hover {
    background: var(--gray-50);
    color: var(--primary-color);
}

.toggle-password:focus,
.toggle-confirm-password:focus {
    box-shadow: 0 0 0 4px var(--primary-light);
    outline: none;
}

.input-group:focus-within .form-control {
    border-color: var(--secondary-color);
}

.input-group:focus-within .toggle-password,
.input-group:focus-within .toggle-confirm-password {
    border-color: var(--secondary-color);
}

/* Password Strength Meter */
.strength-meter {
    height: 4px;
    border-radius: 2px;
    margin-top: var(--space-sm);
    transition: all var(--duration-normal) ease;
    background: var(--gray-200);
}

.strength-meter.strength-weak {
    background: #dc3545;
}

.strength-meter.strength-medium {
    background: #ffc107;
}

.strength-meter.strength-strong {
    background: #28a745;
}

.strength-text {
    display: block;
    margin-top: var(--space-xs);
    font-size: var(--text-xs);
    font-weight: 500;
}

/* Form Check */
.form-check {
    display: flex;
    align-items: flex-start;
    margin-bottom: var(--space-xl);
}

.form-check-input {
    width: 18px;
    height: 18px;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast) ease;
    margin-right: var(--space-sm);
    flex-shrink: 0;
    margin-top: 2px;
}

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

.form-check-input:focus {
    box-shadow: 0 0 0 4px var(--primary-light);
    outline: none;
}

.form-check-label {
    color: var(--gray-600);
    font-weight: 500;
    cursor: pointer;
    -webkit-user-select: none;
    user-select: none;
    font-size: var(--text-sm);
    line-height: 1.4;
}

.terms-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--duration-fast) ease;
}

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

/* Modern Buttons */
.btn {
    font-weight: 600;
    padding: var(--space-lg) var(--space-xl);
    border-radius: var(--radius-lg);
    transition: all var(--duration-fast) ease;
    border: 2px solid transparent;
    font-size: var(--text-base);
    position: relative;
    overflow: hidden;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    cursor: pointer;
}

.btn-auth {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-color: var(--primary-color);
    color: var(--white);
    width: 100%;
    font-size: var(--text-lg);
    font-weight: 700;
    margin-bottom: var(--space-lg);
    padding: var(--space-lg) var(--space-xl);
}

.btn-auth::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 0.5s ease;
}

.btn-auth:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    color: var(--white);
}

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

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

.btn-outline-secondary {
    background: var(--white);
    border-color: var(--gray-300);
    color: var(--gray-600);
    padding: var(--space-md) var(--space-lg);
    transition: all var(--duration-fast) ease;
}

.btn-outline-secondary:hover {
    background: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
    color: var(--white) !important;
    transform: translateY(-1px);
}

/* Make the arrow icon white on hover */
.btn-outline-secondary .fas.fa-arrow-left {
    color: var(--gray-600);
    transition: color var(--duration-fast) ease;
}

.btn-outline-secondary:hover .fas.fa-arrow-left {
    color: var(--white) !important;
}

/* Override any conflicting icon color rules for these specific buttons */
.btn-auth .fas,
.btn-auth .fab,
.btn-auth .far {
    color: var(--white) !important;
}

.btn-outline-secondary:hover .fas,
.btn-outline-secondary:hover .fab,
.btn-outline-secondary:hover .far {
    color: var(--white) !important;
}

/* Links */
a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--duration-fast) ease;
}

a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

/* Form Footer */
.form-footer {
    text-align: center;
    margin-top: var(--space-xl);
}

.form-footer hr {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--gray-300), transparent);
    margin: var(--space-lg) 0;
}

.form-footer p {
    color: var(--gray-600);
    margin-bottom: var(--space-md);
    font-size: var(--text-sm);
}

.form-footer .fw-bold {
    color: var(--primary-color);
    font-weight: 700;
}

.form-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    align-items: center;
}

/* Toast Styling */
.toast-container {
    z-index: 1060;
}

.toast {
    border-radius: var(--radius-lg);
    border: none;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.toast-header {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: var(--space-md) var(--space-lg);
}

.toast-body {
    background: var(--white);
    padding: var(--space-md) var(--space-lg);
    color: var(--neutral-text);
}

/* Icon Colors */
main .fas, 
main .fab, 
main .far, 
main .fal, 
main .fad, 
main .fass, 
main .fasr, 
main .fasl, 
main .fa,
.navbar .fas,
.navbar .fab,
.navbar .far,
.navbar .fal,
.navbar .fad,
.navbar .fass,
.navbar .fasr,
.navbar .fasl,
.navbar .fa,
.about-hero .fas,
.about-hero .fab,
.about-hero .far,
.about-hero .fal,
.about-hero .fad,
.about-hero .fass,
.about-hero .fasr,
.about-hero .fasl,
.about-hero .fa {
    color: var(--primary-color) !important;
}

.navbar .fas, .navbar .fab, .navbar .far {
    color: var(--white) !important;
}

.register-welcome .fas, .register-welcome .fab, .register-welcome .far {
    color: rgba(255, 255, 255, 0.8) !important;
}

.btn-auth .fas.fa-user-plus {
    color: var(--white) !important;
}

/* Loading Animation */
.loading-spinner {
    animation: spin 1s linear infinite;
}

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

/* Footer at bottom */
footer {
    margin-top: auto;
    flex-shrink: 0;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000080;
        --gray-200: #808080;
        --gray-300: #606060;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print styles */
@media print {
    .navbar,
    footer {
        display: none !important;
    }
    
    .main-content {
        padding: var(--space-md) 0;
    }
    
    .register-container {
        box-shadow: none;
        border: 1px solid #000;
    }
    
    .register-welcome {
        background: #f0f0f0 !important;
        color: #000 !important;
    }
}

/* Invalid field styling */
.form-control.is-invalid,
.form-check-input.is-invalid {
    border-color: #dc3545 !important;
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25) !important;
}

.invalid-feedback {
    display: none;
    width: 100%;
    margin-top: 0.25rem;
    font-size: 0.875em;
    color: #dc3545;
    animation: none !important;
    transition: none !important;
}

.form-control.is-invalid ~ .invalid-feedback,
.form-check-input.is-invalid ~ .invalid-feedback {
    display: block;
}

/* Make alert icons white */
.alert .fas.fa-exclamation-circle,
.alert .fas.fa-envelope {
    color: var(--white) !important;
}

/* Ensure alert text and icons are properly colored */
.alert-danger {
    background-color: #dc3545;
    border-color: #dc3545;
    color: var(--white);
}

.alert-success {
    background-color: #198754;
    border-color: #198754;
    color: var(--white);
}

/* Disable browser's default password reveal button */
input[type="password"]::-ms-reveal {
    display: none;
}

input[type="password"]::-webkit-credentials-auto-fill-button {
    display: none !important;
}

/* Fix loading spinner text color for Create Account button */
.btn-auth .loading-spinner {
    color: var(--white) !important;
}

/* Ensure all text in auth button remains white, including loading state */
.btn-auth,
.btn-auth:disabled,
.btn-auth[disabled] {
    color: var(--white) !important;
}

/* Make sure spinner icon is white */
.btn-auth .fas.fa-spinner {
    color: var(--white) !important;
    animation: spin 1s linear infinite;
}

/* Loading spinner animation */
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Ensure loading state maintains white text */
.btn-auth.loading {
    color: var(--white) !important;
}

.btn-auth.loading * {
    color: var(--white) !important;
}

/* Mobile Responsive Design */
@media (max-width: 768px) {
    /* Main content adjustments */
    .main-content {
        padding: var(--space-md) 0;
        min-height: calc(100vh - 60px);
    }
    
    /* Register container - stack vertically on mobile */
    .register-container {
        flex-direction: column;
        margin: 0 var(--space-md);
        min-height: auto;
        max-width: none;
    }
    
    /* Welcome section - compact on mobile */
    .register-welcome {
        padding: var(--space-xl) var(--space-lg);
        min-height: 200px;
        text-align: center;
    }
    
    .welcome-logo img {
        height: 40px;
    }
    
    .welcome-title {
        font-size: var(--text-2xl);
        margin-bottom: var(--space-md);
    }
    
    .welcome-subtitle {
        font-size: var(--text-base);
        margin-bottom: var(--space-lg);
    }
    
    .welcome-features {
        display: none; /* Hide features list on mobile to save space */
    }
    
    /* Form section - more compact */
    .register-form-section {
        padding: var(--space-xl) var(--space-lg);
    }
    
    .form-header h2 {
        font-size: var(--text-2xl);
        margin-bottom: var(--space-sm);
    }
    
    .form-header p {
        font-size: var(--text-sm);
        margin-bottom: var(--space-lg);
    }
    
    .form-group {
        margin-bottom: var(--space-lg);
    }
    
    .form-control {
        padding: var(--space-md) var(--space-sm);
        font-size: var(--text-sm);
    }
    
    .form-label {
        font-size: var(--text-xs);
        margin-bottom: var(--space-xs);
    }
    
    .toggle-password,
    .toggle-confirm-password {
        padding: var(--space-md);
        min-width: 44px;
    }
    
    .strength-text {
        font-size: 0.7rem;
    }
    
    .form-check-label {
        font-size: var(--text-xs);
        line-height: 1.3;
    }
    
    .btn-auth {
        padding: var(--space-md) var(--space-lg);
        font-size: var(--text-base);
        margin-bottom: var(--space-md);
    }
    
    .form-footer {
        margin-top: var(--space-lg);
    }
    
    .form-footer p {
        font-size: var(--text-xs);
    }

}

/* Extra small mobile devices */
@media (max-width: 576px) {
    .main-content {
        padding: var(--space-sm) 0;
    }
    
    .register-container {
        margin: 0 var(--space-sm);
        border-radius: var(--radius-lg);
    }
    
    .register-welcome {
        padding: var(--space-lg) var(--space-md);
        min-height: 150px;
    }
    
    .welcome-title {
        font-size: var(--text-xl);
        margin-bottom: var(--space-sm);
    }
    
    .welcome-subtitle {
        font-size: var(--text-sm);
        margin-bottom: var(--space-md);
    }
    
    .register-form-section {
        padding: var(--space-lg) var(--space-md);
    }
    
    .form-header h2 {
        font-size: var(--text-xl);
    }
    
    .form-control {
        padding: var(--space-sm);
        font-size: var(--text-sm);
    }
    
    .toggle-password,
    .toggle-confirm-password {
        padding: var(--space-sm);
        min-width: 40px;
    }
    
    .btn-auth {
        padding: var(--space-sm) var(--space-md);
        font-size: var(--text-sm);
    }
    
    .form-check-input {
        width: 16px;
        height: 16px;
    }
    
    .form-check-label {
        font-size: 0.7rem;
    }
    
    .btn-outline-secondary {
        padding: var(--space-xs) var(--space-sm);
        font-size: var(--text-xs);
    }

    .strength-text {
        font-size: 0.65rem;
    }
    
    /* Alert messages more compact */
    .alert {
        padding: var(--space-sm);
        font-size: var(--text-xs);
        margin-bottom: var(--space-sm);
    }
}

/* Landscape mobile orientation */
@media (max-width: 768px) and (orientation: landscape) {
    .main-content {
        padding: var(--space-sm) 0;
    }
    
    .register-welcome {
        min-height: 120px;
        padding: var(--space-md) var(--space-lg);
    }
    
    .welcome-title {
        font-size: var(--text-xl);
        margin-bottom: var(--space-xs);
    }
    
    .welcome-subtitle {
        font-size: var(--text-sm);
        margin-bottom: var(--space-sm);
    }
    
    .register-form-section {
        padding: var(--space-md) var(--space-lg);
    }
    
    .form-group {
        margin-bottom: var(--space-md);
    }
}

/* Touch-friendly improvements */
@media (hover: none) and (pointer: coarse) {
    .form-control {
        min-height: 44px; /* Better touch target */
    }
    
    .btn-auth {
        min-height: 44px;
    }
    
    .toggle-password,
    .toggle-confirm-password {
        min-width: 44px;
        min-height: 44px;
    }
    
    .form-check-input {
        width: 20px;
        height: 20px;
    }
    
    .terms-link {
        padding: var(--space-xs) 0; /* Better touch targets for links */
    }
}
.form-check-input.is-invalid ~ .form-check-label {
    display: inline !important;
    white-space: nowrap !important;
    vertical-align: middle;
}

@media (max-width: 768px) {
  .form-check-label[for="agreeTerms"] {
    position: relative;
    top: 4px;
  }
}

#registrationSuccess,
#registrationSuccess .alert,
#registrationSuccessMessage {
    font-size: 0.7em;
}