:root {
    --primary-color: #0c3088; /* Primary color */
    --primary-dark: #082555; /* Darker primary for gradients */
    --secondary-color: #f8f9fa; /* Secondary color */
    --accent-color: #ffd700; /* Accent color */
    --dark-bg: #1a1a1a; /* Dark background */
    --darker-bg: #0f0f0f; /* Darker background */
    --light-text: #ffffff; /* Light text color */
    --muted-text: #cccccc; /* Muted text color */
    --border-color: #333333; /* Border color */
    --card-bg: #2a2a2a; /* Card background */
    --success-color: #28a745; /* Success color */
    --error-color: #dc3545; /* Error color */
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--light-text);
    background: var(--dark-bg);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px 0;
}

.container-fluid {
    width: 100%;
    max-width: 1200px;
}

.auth-container {
    background: var(--card-bg);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    max-width: 900px;
    width: 100%;
    display: flex;
    margin: 0 auto;
    opacity: 1;
    transform: translateY(0);
    transition: all 0.6s ease;
}

.auth-left {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--light-text);
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
}

.back-to-home {
    position: absolute;
    top: 20px;
    left: 20px;
    color: var(--light-text);
    text-decoration: none;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
    padding: 8px 12px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.back-to-home:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--accent-color);
    transform: translateX(-5px);
}

.back-to-home i {
    margin-right: 8px;
}

.brand-logo {
    margin-bottom: 20px;
}

.brand-logo h2 {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    margin: 0;
}

.brand-tagline {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 30px;
}

.feature-list {
    list-style: none;
    padding: 0;
    margin-bottom: 20px;
}

.feature-list li {
    margin-bottom: 12px;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    text-align: left;
}

.feature-list li i {
    margin-right: 12px;
    color: var(--accent-color);
    font-size: 1rem;
    min-width: 16px;
}

.auth-right {
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    flex: 1;
}

.auth-form {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.auth-form.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-title {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--light-text);
}

.form-subtitle {
    color: var(--muted-text);
    margin-bottom: 30px;
    font-size: 0.95rem;
}

.success-message {
    background: var(--success-color);
    color: white;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: none;
    font-size: 0.9rem;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-group {
    margin-bottom: 20px;
    position: relative;
}

.form-group.focused {
    transform: translateY(-2px);
}

.form-control {
    padding: 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    width: 100%;
    background: var(--darker-bg);
    color: var(--light-text);
    font-family: 'Poppins', sans-serif;
}

.form-control::placeholder {
    color: var(--muted-text);
    opacity: 0.7;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(12, 48, 136, 0.25);
    outline: none;
    background: var(--card-bg);
}

.form-control.valid {
    border-color: var(--success-color);
}

.position-relative {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--muted-text);
    cursor: pointer;
    padding: 5px;
    transition: color 0.3s ease;
}

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

.form-check {
    display: flex;
    align-items: flex-start;
    margin-bottom: 20px;
    gap: 10px;
}

.form-check-input {
    margin: 0;
    margin-top: 2px;
    accent-color: var(--primary-color);
}

.form-check-label {
    font-size: 0.9rem;
    color: var(--muted-text);
    line-height: 1.4;
    cursor: pointer;
}

.form-check-label a {
    color: var(--primary-color);
    text-decoration: none;
}

.form-check-label a:hover {
    text-decoration: underline;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border: none;
    padding: 15px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    width: 100%;
    transition: all 0.3s ease;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: 'Poppins', sans-serif;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(12, 48, 136, 0.3);
}

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

.divider {
    text-align: center;
    margin: 25px 0;
    color: var(--muted-text);
    font-size: 0.9rem;
    position: relative;
}

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

.divider span {
    background: var(--card-bg);
    padding: 0 20px;
    position: relative;
    z-index: 2;
}

.social-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
}

.btn-social {
    flex: 1;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--card-bg);
    color: var(--muted-text);
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    font-weight: 500;
}

.btn-social:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    text-decoration: none;
}

.switch-form {
    text-align: center;
    margin-top: 20px;
    font-size: 0.9rem;
    color: var(--muted-text);
}

.switch-form a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
}

.switch-form a:hover {
    text-decoration: underline;
}

.footer {
    text-align: center;
    padding: 20px;
    background: var(--darker-bg);
    color: var(--muted-text);
    border-top: 1px solid var(--border-color);
}

.footer a {
    color: var(--accent-color);
    text-decoration: none;
}

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


.error-message {
            display: none;
            padding: 0.75rem 1rem;
            margin-bottom: 1.25rem;
            background-color: #f8d7da;
            color: #721c24;
            border-radius: 0.5rem;
            border: 1px solid #f5c6cb;
        }
        
        .success-message {
            display: none;
            padding: 0.75rem 1rem;
            margin-bottom: 1.25rem;
            background-color: #d4edda;
            color: #155724;
            border-radius: 0.5rem;
            border: 1px solid #c3e6cb;
        }

/* Row spacing for Bootstrap grid */
.row {
    margin-bottom: 0;
}

.row .col-md-6 .form-group {
    margin-bottom: 20px;
}

/* Responsive Design */
@media (max-width: 992px) {
    .auth-container {
        flex-direction: column;
        margin: 20px;
        max-width: 600px;
    }

    .auth-left {
        padding: 30px;
        text-align: center;
    }

    .back-to-home {
        position: static;
        margin-bottom: 20px;
        align-self: flex-start;
    }

    .auth-right {
        padding: 30px;
    }

    .brand-logo h2 {
        font-size: 2rem;
    }

    .form-title {
        font-size: 1.5rem;
    }
}

@media (max-width: 768px) {
    body {
        padding: 10px 0;
    }

    .auth-container {
        margin: 10px;
    }

    .auth-left,
    .auth-right {
        padding: 25px;
    }

    .brand-logo h2 {
        font-size: 1.8rem;
    }

    .form-title {
        font-size: 1.4rem;
    }

    .social-buttons {
        flex-direction: column;
        gap: 10px;
    }

    .btn-social {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .auth-left,
    .auth-right {
        padding: 20px;
    }

    .brand-logo h2 {
        font-size: 1.6rem;
    }

    .form-title {
        font-size: 1.3rem;
    }

    .form-control {
        padding: 12px;
    }

    .btn-primary {
        padding: 12px;
    }
}

/* Loading and transition effects */
.auth-container {
    transition: opacity 0.6s ease, transform 0.6s ease;
}

/* Focus improvements for accessibility */
.form-control:focus,
.btn-primary:focus,
.btn-social:focus,
.password-toggle:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Custom scrollbar for webkit browsers */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--darker-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

/* Password strength meter (signup pages) */
.pw-strength {
    margin-top: 8px;
    font-size: 12px;
    color: var(--muted-text);
}
.pw-strength-track {
    height: 4px;
    background: var(--border-color, #333);
    border-radius: 2px;
    overflow: hidden;
}
.pw-strength-fill {
    height: 100%;
    width: 0%;
    background: var(--error-color, #b91c1c);
    transition: width 200ms ease, background-color 200ms ease;
}
.pw-strength-fill[data-score="1"] { width: 20%;  background: #b91c1c; }
.pw-strength-fill[data-score="2"] { width: 40%;  background: #c2410c; }
.pw-strength-fill[data-score="3"] { width: 60%;  background: #b45309; }
.pw-strength-fill[data-score="4"] { width: 80%;  background: #65a30d; }
.pw-strength-fill[data-score="5"] { width: 100%; background: #16a34a; }
.pw-strength-checks {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 12px;
    margin-top: 6px;
}
.pw-strength-checks span {
    opacity: 0.55;
    transition: opacity 200ms ease, color 200ms ease;
}
.pw-strength-checks span.passed {
    opacity: 1;
    color: var(--success-color, #16a34a);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}