/* Modern CSS Reset and Base Styles */
:root {
    --color-primary: #1b6bf9;
    --color-primary-dark: #1354d8;
    --color-accent: #764ba2;
    --color-accent-light: #9b6cc7;
    --color-success: #10b981;
    --color-dark: #111827;
    --color-gray-900: #1f2937;
    --color-gray-800: #374151;
    --color-gray-700: #4b5563;
    --color-gray-600: #6b7280;
    --color-gray-500: #9ca3af;
    --color-gray-400: #d1d5db;
    --color-gray-300: #e5e7eb;
    --color-gray-200: #f3f4f6;
    --color-gray-100: #f9fafb;
    --color-white: #ffffff;
    
    --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --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);
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-gray-900);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-dark);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

@media (min-width: 768px) {
    h1 { font-size: 3.5rem; }
    h2 { font-size: 2.5rem; }
    h3 { font-size: 1.875rem; }
}

p {
    margin-bottom: 1rem;
    color: var(--color-gray-700);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--color-primary-dark);
}

/* Navigation */
.navbar {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-sm);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    display: flex;
    align-items: center;
}

.brand-accent {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: var(--color-white);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-sm);
    margin-right: 0.25rem;
}

.nav-menu {
    display: none;
    align-items: center;
    gap: 2rem;
}

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

.nav-link {
    color: var(--color-gray-800);
    font-weight: 500;
    transition: color 0.2s;
}

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

.nav-toggle {
    display: block;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

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

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-gray-800);
    margin: 5px 0;
    transition: 0.3s;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* Mobile Menu */
@media (max-width: 767px) {
    .nav-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 60px);
        background: var(--color-white);
        flex-direction: column;
        padding: 2rem;
        transition: left 0.3s;
        box-shadow: var(--shadow-xl);
    }
    
    .nav-menu.active {
        left: 0;
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1.5rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all 0.2s;
    cursor: pointer;
    border: none;
    text-decoration: none;
    font-size: 0.875rem;
    gap: 0.5rem;
}

.btn-large {
    padding: 0.75rem 2rem;
    font-size: 1rem;
}

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

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

.btn-accent {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: var(--color-white);
}

.btn-accent:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
    filter: brightness(1.1);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--color-gray-300);
    color: var(--color-gray-800);
}

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

.btn-icon {
    width: 1rem;
    height: 1rem;
}

/* Hero Section */
.hero {
    padding: 4rem 0 6rem;
    background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-white) 100%);
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.hero-title {
    margin-bottom: 1.5rem;
}

.text-accent {
    display: block;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--color-gray-700);
    margin-bottom: 2rem;
    max-width: 750px;
    margin-left: auto;
    margin-right: auto;
}

.hero-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.feature-badge {
    background: var(--color-white);
    padding: 1rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.feature-icon {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
    flex-shrink: 0;
}

.feature-badge div {
    text-align: left;
}

.feature-badge strong {
    display: block;
    font-size: 0.875rem;
    color: var(--color-gray-800);
}

.feature-badge span {
    font-size: 0.75rem;
    color: var(--color-gray-600);
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.hero-note {
    font-size: 0.875rem;
    color: var(--color-gray-600);
}

/* Sections */
.section {
    padding: 5rem 0;
}

.section-gray {
    background: var(--color-gray-50);
}

.section-accent {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.section-title {
    text-align: center;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--color-gray-600);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.text-white {
    color: var(--color-white) !important;
}

/* Timeline */
.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 40px;
    top: 40px;
    bottom: 40px;
    width: 2px;
    background: var(--color-gray-300);
}

.timeline-item {
    display: flex;
    margin-bottom: 3rem;
    position: relative;
}

.timeline-number {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 1;
}

.timeline-content {
    padding-left: 2rem;
    flex: 1;
}

.timeline-content h3 {
    margin-bottom: 0.5rem;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.feature-card {
    background: var(--color-white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-gray-200);
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}

.feature-card-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: var(--color-white);
    padding: 0.75rem;
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
}

.feature-card-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--color-gray-600);
    margin: 0;
}

/* Story Card */
.story-card {
    max-width: 800px;
    margin: 0 auto;
    background: var(--color-white);
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 2px solid var(--color-gray-200);
}

.story-content p {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.story-highlight {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: var(--color-white);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    margin-top: 2rem;
}

.story-highlight strong {
    display: block;
    margin-bottom: 0.5rem;
}

/* Benefits Grid */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.benefit-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.benefit-card h3 {
    color: var(--color-white);
    margin-bottom: 1rem;
}

.benefit-card p {
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
}

/* CTA Card */
.cta-card {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-white) 100%);
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 2px solid var(--color-gray-200);
}

.cta-card h2 {
    margin-bottom: 1rem;
}

.cta-card p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.cta-note {
    font-size: 0.875rem;
    color: var(--color-gray-600);
}

/* Footer */
.footer {
    background: var(--color-gray-900);
    color: var(--color-white);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand {
    grid-column: span 1;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-brand p {
    color: var(--color-gray-400);
    margin-bottom: 0.5rem;
}

.footer-duocircle {
    margin-top: 1rem;
}

.footer-duocircle a {
    color: var(--color-accent-light);
}

.footer-links h4 {
    color: var(--color-white);
    margin-bottom: 1rem;
    font-size: 1rem;
}

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

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--color-gray-400);
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--color-white);
}

.footer-bottom {
    border-top: 1px solid var(--color-gray-800);
    padding-top: 1.5rem;
    text-align: center;
    color: var(--color-gray-400);
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero {
        padding: 3rem 0 4rem;
    }
    
    .section {
        padding: 3rem 0;
    }
    
    .timeline::before {
        display: none;
    }
    
    .timeline-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .timeline-content {
        padding-left: 0;
        padding-top: 1rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .story-card {
        padding: 2rem;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}