/* Reset e Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0047AB;
    --primary-dark: #003a91;
    --secondary-color: #5865f2;
    --accent-color: #2196f3;
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --text-light: #a0aec0;
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-dark: #1a202c;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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);
    --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    --gradient-secondary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.highlight {
    color: var(--primary-color);
    font-weight: 600;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.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 0.5s;
}

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

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.btn-large {
    padding: 16px 32px;
    font-size: 16px;
}

.btn-full {
    width: 100%;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.navbar {
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-logo i {
    color: var(--primary-color);
    font-size: 28px;
}

.nav-menu {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-buttons {
    display: flex;
    gap: 1rem;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 3px;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.hero::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 0 100 100"><circle cx="50" cy="50" r="2" fill="rgba(255,255,255,0.1)"/></svg>') repeat;
    background-size: 50px 50px;
    animation: float 20s infinite linear;
}

@keyframes float {
    0% { transform: translateY(0) translateX(0); }
    33% { transform: translateY(-10px) translateX(10px); }
    66% { transform: translateY(5px) translateX(-5px); }
    100% { transform: translateY(0) translateX(0); }
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 100px 20px 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    color: white;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    animation: slideInLeft 1s ease-out;
}

.hero-subtitle {
    font-size: 1.2rem;
    line-height: 1.6;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: slideInLeft 1s ease-out 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    animation: slideInLeft 1s ease-out 0.4s both;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-image {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.floating-cards {
    position: relative;
    width: 400px;
    height: 400px;
}

.card {
    position: absolute;
    background: white;
    border-radius: 16px;
    padding: 20px;
    box-shadow: var(--shadow-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
    animation: floatCard 6s ease-in-out infinite;
}

.card i {
    font-size: 24px;
    color: var(--primary-color);
}

.study-card {
    top: 20px;
    left: 50px;
    animation-delay: 0s;
}

.stats-card {
    top: 150px;
    right: 30px;
    animation-delay: 2s;
}

.timer-card {
    bottom: 50px;
    left: 80px;
    animation-delay: 4s;
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(2deg); }
}

/* Features Section */
.features {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.features-grid {
    display: flex;
    flex-direction: column;
    gap: 100px;
}

.feature-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.feature-item.reverse {
    direction: rtl;
}

.feature-item.reverse > * {
    direction: ltr;
}

.feature-step {
    display: flex;
    gap: 2rem;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: var(--shadow-md);
}

.step-content h4 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.step-content p {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.feature-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Edital Selector */
.edital-selector {
    background: white;
    border-radius: 16px;
    padding: 30px;
    box-shadow: var(--shadow-lg);
    max-width: 400px;
    width: 100%;
}

.edital-card {
    text-align: center;
}

.edital-logo {
    width: 60px;
    height: 60px;
    background: var(--bg-secondary);
    border-radius: 50%;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.edital-card h5 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.cargo-list {
    list-style: none;
    text-align: left;
}

.cargo-list li {
    padding: 8px 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
}

.cargo-list li:last-child {
    border-bottom: none;
}

/* Planning Interface */
.planning-interface {
    background: white;
    border-radius: 16px;
    padding: 30px;
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 100%;
}

.planning-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.planning-header h6 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.status-badges {
    display: flex;
    gap: 10px;
}

.badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.badge.recommended {
    background: #e6fffa;
    color: var(--primary-color);
}

.badge.personalized {
    background: #fef5e7;
    color: #f6ad55;
}

.planning-chart {
    position: relative;
    width: 300px;
    height: 300px;
    margin: 0 auto;
}

.chart-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.chart-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.chart-time {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Study Register */
.study-register {
    background: white;
    border-radius: 16px;
    padding: 30px;
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 100%;
}

.register-header {
    margin-bottom: 30px;
}

.register-header h6 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.success-message {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 15px;
    background: #f0fff4;
    border: 1px solid #68d391;
    border-radius: 8px;
    color: #2f855a;
    font-size: 0.9rem;
}

.success-message i {
    color: #38a169;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 15px;
    margin-bottom: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.form-group select,
.form-group input {
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
    transition: border-color 0.3s ease;
}

.form-group select:focus,
.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-actions {
    display: flex;
    gap: 10px;
    margin: 20px 0;
}

.btn-check {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
    flex: 1;
}

.btn-program {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 10px 20px;
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
    flex: 1;
}

.time-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.time-btn {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    background: white;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.time-btn.active,
.time-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Results Dashboard */
.results-dashboard {
    background: white;
    border-radius: 16px;
    padding: 30px;
    box-shadow: var(--shadow-lg);
    max-width: 600px;
    width: 100%;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    grid-template-rows: auto auto;
    gap: 20px;
}

.performance-card {
    text-align: center;
}

.performance-card h6 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.circular-progress {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: conic-gradient(var(--primary-color) 0deg 288deg, var(--bg-secondary) 288deg 360deg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    position: relative;
}

.circular-progress::before {
    content: '';
    width: 70px;
    height: 70px;
    background: white;
    border-radius: 50%;
    position: absolute;
}

.progress-value {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    z-index: 1;
}

.subjects-progress {
    grid-column: 2;
}

.subjects-progress h6 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.subjects-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.subject-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
}

.subject-name {
    font-size: 0.9rem;
    color: var(--text-secondary);
    min-width: 120px;
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--primary-color);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.evolution-chart {
    grid-column: 1 / -1;
    margin-top: 20px;
}

.evolution-chart h6 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 15px;
}

/* Final CTA Section */
.final-cta {
    padding: 100px 0;
    background: var(--bg-primary);
    text-align: center;
}

.cta-content {
    max-width: 1000px;
    margin: 0 auto;
}

.cta-spoiler {
    font-size: 0.9rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 1rem;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 3rem;
    line-height: 1.3;
}

.cta-preview {
    position: relative;
    margin: 4rem 0;
    display: flex;
    justify-content: center;
}

.preview-image {
    max-width: 800px;
    width: 100%;
    border-radius: 16px;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.preview-image img {
    width: 100%;
    height: auto;
    display: block;
}

.preview-features {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.feature-annotation {
    position: absolute;
    background: white;
    padding: 10px 15px;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    font-size: 0.8rem;
    color: var(--text-primary);
    max-width: 200px;
    border: 2px solid var(--primary-color);
}

.feature-annotation.left {
    top: 20%;
    left: -220px;
}

.feature-annotation.right {
    top: 30%;
    right: -220px;
}

.feature-annotation.bottom-left {
    bottom: 30%;
    left: -220px;
}

.feature-annotation.bottom-right {
    bottom: 20%;
    right: -220px;
}

.feature-annotation.center {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.feature-annotation.bottom-center {
    bottom: 10%;
    left: 50%;
    transform: translateX(-50%);
}

.arrow {
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid var(--primary-color);
}

.arrow-left {
    right: -10px;
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
    border-left: none;
    border-bottom: none;
}

.arrow-right {
    left: -10px;
    top: 50%;
    transform: translateY(-50%) rotate(-135deg);
    border-left: none;
    border-bottom: none;
}

.arrow-up {
    top: -10px;
    left: 50%;
    transform: translateX(-50%) rotate(-45deg);
    border-left: none;
    border-bottom: none;
}

.arrow-down {
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%) rotate(135deg);
    border-left: none;
    border-bottom: none;
}

.cta-button {
    margin-top: 2rem;
}

/* Footer */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
}

.footer-logo i {
    color: var(--primary-color);
    font-size: 28px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer-section h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: white;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #a0aec0;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid #4a5568;
    padding-top: 2rem;
    text-align: center;
    color: #a0aec0;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 0;
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.3s ease-out;
}

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

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 30px 20px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.close {
    color: var(--text-light);
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close:hover {
    color: var(--text-primary);
}

.modal-form {
    padding: 30px;
}

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

.modal-form label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--text-primary);
}

.modal-form input {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.modal-form input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.1);
}

.modal-footer-text {
    text-align: center;
    margin-top: 20px;
    color: var(--text-secondary);
}

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

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

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .feature-item {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .feature-item.reverse {
        direction: ltr;
    }
    
    .floating-cards {
        width: 300px;
        height: 300px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-md);
        z-index: 1000;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-list {
        flex-direction: column;
        padding: 2rem 0;
    }
    
    .nav-item {
        margin: 1rem 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-buttons {
        display: none;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .section-subtitle {
        font-size: 1.2rem;
    }
    
    .cta-title {
        font-size: 1.8rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .floating-cards {
        width: 250px;
        height: 250px;
    }
    
    .card {
        padding: 15px;
    }
    
    .feature-annotation {
        position: relative !important;
        top: auto !important;
        left: auto !important;
        right: auto !important;
        bottom: auto !important;
        transform: none !important;
        margin: 10px 0;
        max-width: 100%;
    }
    
    .arrow {
        display: none;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .subjects-progress {
        grid-column: 1;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-container {
        padding: 80px 15px 20px;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .btn-large {
        padding: 14px 24px;
        font-size: 14px;
    }
    
    .floating-cards {
        width: 200px;
        height: 200px;
    }
    
    .modal-content {
        margin: 10% auto;
        width: 95%;
    }
    
    .modal-header,
    .modal-form {
        padding: 20px;
    }
}

/* Animation utilities */
.fade-in {
    animation: fadeIn 1s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.slide-up {
    animation: slideUp 0.8s ease-out;
}

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

/* Utility classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.hidden { display: none; }
.visible { display: block; }