/* ============================================
   Reset & Base Styles
   ============================================ */

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

:root {
    /* Colors */
    --primary-color: #2563EB;
    --accent-color: #10B981;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --bg-white: #FFFFFF;
    --bg-gray: #F9FAFB;
    --border-color: #E5E7EB;
    --error-color: #EF4444;
    --success-color: #10B981;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 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);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--text-primary);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

@media (min-width: 640px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 {
    font-size: 2rem;
}

h2 {
    font-size: 1.75rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

@media (min-width: 768px) {
    h1 {
        font-size: 3rem;
    }
    
    h2 {
        font-size: 2.25rem;
    }
    
    h3 {
        font-size: 1.875rem;
    }
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #1D4ED8 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: var(--bg-white);
    color: var(--primary-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-gray);
}

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

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
}

/* ============================================
   Header
   ============================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-base);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    position: relative;
}

@media (max-width: 767px) {
    .nav {
        flex-wrap: wrap;
    }
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--text-primary);
    text-decoration: none;
}

.nav-menu {
    display: none;
    list-style: none;
    gap: var(--spacing-lg);
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-white);
    flex-direction: column;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    border-top: 1px solid var(--border-color);
}

.nav-menu.active {
    display: flex;
}

@media (min-width: 768px) {
    .nav-menu {
        position: static;
        display: flex;
        flex-direction: row;
        background: transparent;
        box-shadow: none;
        border: none;
        padding: 0;
    }
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.nav-actions {
    display: none;
    gap: var(--spacing-sm);
    align-items: center;
}

@media (min-width: 768px) {
    .nav-actions {
        display: flex;
    }
}

@media (max-width: 767px) {
    .nav-menu.active ~ .nav-actions {
        display: flex;
        flex-direction: column;
        width: 100%;
        padding-top: var(--spacing-md);
        border-top: 1px solid var(--border-color);
        margin-top: var(--spacing-md);
    }
    
    .nav-menu.active ~ .nav-actions .btn {
        width: 100%;
    }
}

.menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

@media (min-width: 768px) {
    .menu-toggle {
        display: none;
    }
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    padding: calc(80px + var(--spacing-xl)) var(--spacing-sm) var(--spacing-2xl);
    background: linear-gradient(180deg, #F0F9FF 0%, var(--bg-white) 100%);
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color) 0%, #1D4ED8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

@media (min-width: 640px) {
    .hero-cta {
        flex-direction: row;
        justify-content: center;
    }
}

.hero-trust {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    color: var(--success-color);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xl);
}

.hero-visual {
    margin-top: var(--spacing-2xl);
}

.dashboard-preview {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-xl);
    max-width: 900px;
    margin: 0 auto;
}

.chart-placeholder {
    display: flex;
    align-items: flex-end;
    justify-content: space-around;
    height: 200px;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
}

.chart-bar {
    flex: 1;
    background: linear-gradient(180deg, var(--primary-color) 0%, #1D4ED8 100%);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    min-height: 20px;
    animation: growUp 1s ease-out;
}

@keyframes growUp {
    from {
        height: 0;
    }
    to {
        height: 100%;
    }
}

/* ============================================
   Section Styles
   ============================================ */

section {
    padding: var(--spacing-2xl) var(--spacing-sm);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* ============================================
   Problem/Solution Section
   ============================================ */

.problem-solution-grid {
    display: grid;
    gap: var(--spacing-xl);
    max-width: 900px;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .problem-solution-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.problem-card,
.solution-card {
    padding: var(--spacing-xl);
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.icon-wrapper {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.problem-icon {
    background: rgba(239, 68, 68, 0.1);
}

.solution-icon {
    background: rgba(16, 185, 129, 0.1);
}

.problem-card h3,
.solution-card h3 {
    margin-bottom: var(--spacing-sm);
}

.problem-card p,
.solution-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ============================================
   Features Section
   ============================================ */

.features {
    background: var(--bg-gray);
}

.features-grid {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: 1fr;
}

@media (min-width: 640px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.feature-card {
    padding: var(--spacing-xl);
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.25rem;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ============================================
   How It Works Section
   ============================================ */

.steps {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: 1fr;
    max-width: 900px;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .steps {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-md);
    }
    
    .step-arrow {
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

.step-arrow {
    display: none;
}

@media (min-width: 768px) {
    .step-arrow {
        display: flex;
    }
}

.step {
    text-align: center;
    padding: var(--spacing-xl);
}

.step-number {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color) 0%, #1D4ED8 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto var(--spacing-md);
}

.step h3 {
    margin-bottom: var(--spacing-sm);
}

.step p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ============================================
   Pricing Section
   ============================================ */

.pricing {
    background: var(--bg-gray);
}

.pricing-grid {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: 1fr;
    max-width: 1100px;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .pricing-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.pricing-card {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    position: relative;
    border: 2px solid transparent;
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
    border-color: var(--primary-color);
    transform: scale(1.05);
}

@media (max-width: 1023px) {
    .pricing-card.featured {
        transform: none;
    }
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary-color) 0%, #1D4ED8 100%);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.pricing-header h3 {
    margin-bottom: var(--spacing-md);
}

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.price-amount {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.price-period {
    color: var(--text-secondary);
    font-size: 1rem;
}

.pricing-yearly {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.discount {
    color: var(--success-color);
    font-weight: 600;
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--spacing-xl);
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
}

/* ============================================
   Use Cases Section
   ============================================ */

.use-cases-grid {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .use-cases-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.use-case-card {
    padding: var(--spacing-xl);
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.use-case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.use-case-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.use-case-card h3 {
    margin-bottom: var(--spacing-sm);
}

.use-case-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ============================================
   Testimonials Section
   ============================================ */

.testimonials {
    background: var(--bg-gray);
}

.testimonials-grid {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.testimonial-card {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.testimonial-rating {
    color: #FBBF24;
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
}

.testimonial-text {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color) 0%, #1D4ED8 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
}

.author-name {
    font-weight: 600;
    color: var(--text-primary);
}

.author-role {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ============================================
   FAQ Section
   ============================================ */

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: var(--spacing-lg);
    background: none;
    border: none;
    text-align: left;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    transition: background var(--transition-fast);
}

.faq-question:hover {
    background: var(--bg-gray);
}

.faq-icon {
    flex-shrink: 0;
    transition: transform var(--transition-base);
    color: var(--primary-color);
}

.faq-item[aria-expanded="true"] .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base), padding var(--transition-base);
    padding: 0 var(--spacing-lg);
}

.faq-item[aria-expanded="true"] .faq-answer {
    max-height: 500px;
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

.faq-answer p {
    color: var(--text-secondary);
    line-height: 1.8;
    padding-top: var(--spacing-sm);
}

/* ============================================
   Final CTA Section
   ============================================ */

.final-cta {
    background: linear-gradient(135deg, var(--primary-color) 0%, #1D4ED8 100%);
    color: white;
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    color: white;
    margin-bottom: var(--spacing-md);
}

.cta-subtitle {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

.final-cta .btn-primary {
    background: white;
    color: var(--primary-color);
}

.final-cta .btn-primary:hover {
    background: var(--bg-gray);
}

/* ============================================
   Footer
   ============================================ */

.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-2xl) var(--spacing-sm);
}

.footer-content {
    display: grid;
    gap: var(--spacing-xl);
    grid-template-columns: 1fr;
    margin-bottom: var(--spacing-xl);
}

@media (min-width: 640px) {
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .footer-content {
        grid-template-columns: repeat(4, 1fr);
    }
}

.footer-section h4 {
    color: white;
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

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

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-section a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast);
}

.social-links a:hover {
    background: rgba(255, 255, 255, 0.2);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* ============================================
   Modal
   ============================================ */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    z-index: 1;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.3s ease-out;
}

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

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    z-index: 10;
}

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

.modal-progress {
    padding: var(--spacing-xl) var(--spacing-xl) var(--spacing-md);
}

.progress-bar {
    height: 4px;
    background: var(--border-color);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color) 0%, #1D4ED8 100%);
    transition: width var(--transition-base);
    width: 33.33%;
}

.progress-steps {
    display: flex;
    justify-content: space-between;
    padding: 0 var(--spacing-md);
}

.progress-step {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--border-color);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    transition: all var(--transition-base);
}

.progress-step.active {
    background: var(--primary-color);
    color: white;
}

.modal-step {
    display: none;
    padding: var(--spacing-xl);
}

.modal-step.active {
    display: block;
}

.modal-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

/* ============================================
   Plan Selection
   ============================================ */

.plan-selection {
    display: grid;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.plan-option {
    position: relative;
}

.plan-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.plan-option label {
    display: block;
    padding: var(--spacing-lg);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    background: var(--bg-white);
}

.plan-option input[type="radio"]:checked + label,
.plan-option.selected label {
    border-color: var(--primary-color);
    background: rgba(37, 99, 235, 0.05);
}

.plan-option-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.plan-option-header h3 {
    margin: 0;
    font-size: 1.25rem;
}

.plan-option-price {
    font-weight: 700;
    color: var(--primary-color);
}

.plan-option-features {
    list-style: none;
}

.plan-option-features li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ============================================
   Registration Form
   ============================================ */

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

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

.form-group label {
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"] {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group input.error {
    border-color: var(--error-color);
}

.error-message {
    color: var(--error-color);
    font-size: 0.875rem;
    display: none;
}

.error-message.show {
    display: block;
}

.password-strength {
    display: flex;
    gap: 4px;
    align-items: center;
    margin-top: var(--spacing-xs);
}

.strength-bar {
    flex: 1;
    height: 4px;
    background: var(--border-color);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.strength-text {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-left: var(--spacing-xs);
}

.checkbox-group {
    flex-direction: row;
    align-items: flex-start;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xs);
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
    margin-top: 4px;
    cursor: pointer;
}

.modal-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

/* ============================================
   Payment Form
   ============================================ */

.payment-summary {
    background: var(--bg-gray);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

.summary-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.summary-item.total {
    border-top: 2px solid var(--border-color);
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-md);
    font-weight: 700;
    font-size: 1.125rem;
}

.period-toggle {
    display: flex;
    gap: var(--spacing-xs);
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: 2px;
}

.toggle-btn {
    padding: 0.5rem 1rem;
    border: none;
    background: transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
}

.toggle-btn.active {
    background: var(--primary-color);
    color: white;
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.payment-security {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--success-color);
    font-size: 0.875rem;
    padding: var(--spacing-md);
    background: rgba(16, 185, 129, 0.1);
    border-radius: var(--radius-md);
}

/* ============================================
   Success Step
   ============================================ */

.success-content {
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.success-icon {
    margin-bottom: var(--spacing-lg);
    display: flex;
    justify-content: center;
}

.success-message {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

/* ============================================
   Animations
   ============================================ */

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* ============================================
   Accessibility
   ============================================ */

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

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

/* ============================================
   Responsive Adjustments
   ============================================ */

@media (max-width: 639px) {
    .modal-content {
        max-height: 95vh;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .modal-actions {
        flex-direction: column;
    }
    
    .modal-actions .btn {
        width: 100%;
    }
}