:root {
    /* Light Theme Variables */
    --bg-color: #ffffff;
    --surface-color: #ffffff;
    --text-primary: #171717;
    /* neutral[900] */
    --text-secondary: #262626;
    /* neutral[800] */
    --input-bg: #fafafa;
    /* neutral[50] */
    --border-color: #d4d4d4;
    /* neutral[300] */
    --primary-color: #2563eb;
    /* primary[600] - assuming a blue shade, adjustable */
    --primary-hover: #1d4ed8;
    --nav-bg: rgba(255, 255, 255, 0.8);
    --card-bg: #ffffff;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --hero-gradient: linear-gradient(135deg, #eff6ff 0%, #ffffff 100%);
}

[data-theme="dark"] {
    /* Dark Theme Variables */
    --bg-color: #171717;
    /* neutral[900] */
    --surface-color: #262626;
    /* neutral[800] */
    --text-primary: #ffffff;
    --text-secondary: #e5e5e5;
    /* neutral[200] */
    --input-bg: #262626;
    /* neutral[800] */
    --border-color: #404040;
    /* neutral[700] */
    --primary-color: #2563eb;
    /* primary[600] */
    --primary-hover: #3b82f6;
    --nav-bg: rgba(23, 23, 23, 0.8);
    --card-bg: #262626;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --hero-gradient: linear-gradient(135deg, #171717 0%, #0a0a0a 100%);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1rem 0;
    background-color: var(--nav-bg);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.2s;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

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

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

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

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-disabled {
    opacity: 0.7;
    cursor: not-allowed;
    background-color: var(--text-secondary);
}

.btn-disabled:hover {
    transform: none;
    background-color: var(--text-secondary);
}

/* Badge */
.badge-dev {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
    border-radius: 2rem;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid var(--primary-color);
}

/* Theme Toggle */
.theme-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color 0.2s;
}

.theme-btn:hover {
    background-color: var(--input-bg);
    color: var(--primary-color);
}

[data-theme="light"] .moon-icon {
    display: block;
}

[data-theme="light"] .sun-icon {
    display: none;
}

[data-theme="dark"] .moon-icon {
    display: none;
}

[data-theme="dark"] .sun-icon {
    display: block;
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--text-primary);
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 8rem 0 4rem;
    background: var(--hero-gradient);
    position: relative;
    overflow: hidden;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

.gradient-text {
    background: linear-gradient(45deg, var(--primary-color), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-text p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 500px;
}

.hero-btns {
    display: flex;
    gap: 1rem;
}

/* App Mockup */
.hero-visual {
    display: flex;
    justify-content: center;
    perspective: 1000px;
}

.app-mockup {
    width: 300px;
    height: 600px;
    background-color: var(--bg-color);
    border: 8px solid var(--text-primary);
    border-radius: 40px;
    position: relative;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    transform: rotateY(-10deg) rotateX(5deg);
    transition: transform 0.5s ease;
    overflow: hidden;
}

.app-mockup:hover {
    transform: rotateY(0) rotateX(0);
}

.mockup-screen {
    height: 100%;
    background-color: var(--input-bg);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mockup-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 0.8rem;
    font-weight: bold;
}

.mockup-status span {
    display: inline-block;
    width: 6px;
    height: 6px;
    background-color: var(--text-primary);
    border-radius: 50%;
    margin-left: 2px;
}

.mockup-card {
    height: 100px;
    background-color: var(--surface-color);
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.mockup-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
}

.mockup-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary-color);
    opacity: 0.8;
}

.mockup-line {
    flex: 1;
    height: 10px;
    background-color: var(--border-color);
    border-radius: 5px;
}

.mockup-nav {
    margin-top: auto;
    height: 50px;
    background-color: var(--surface-color);
    border-radius: 20px;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

/* Features Section */
.features {
    padding: 6rem 0;
    background-color: var(--bg-color);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease;
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    width: 50px;
    height: 50px;
    background-color: rgba(37, 99, 235, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* About Section */
.about {
    padding: 6rem 0;
    background-color: var(--input-bg);
    text-align: center;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.about p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* Footer */
footer {
    background-color: var(--bg-color);
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

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

.copyright {
    color: var(--text-secondary);
    font-size: 0.9rem;
    opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .hero-btns {
        justify-content: center;
    }

    .hero-visual {
        margin-top: 3rem;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--bg-color);
        flex-direction: column;
        padding: 2rem;
        border-bottom: 1px solid var(--border-color);
    }

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

    .mobile-menu-btn {
        display: flex;
    }
}

/* Policy Pages */
.page-content {
    padding-top: 8rem;
    padding-bottom: 4rem;
    max-width: 800px;
}

.page-content h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.page-content .meta-text {
    color: var(--text-secondary);
    margin-bottom: 3rem;
    font-size: 0.9rem;
}

.page-content section {
    margin-bottom: 2.5rem;
}

.page-content h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.page-content h3 {
    font-size: 1.1rem;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.page-content p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.page-content ul {
    list-style-position: inside;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.page-content li {
    margin-bottom: 0.5rem;
}

.page-content a {
    color: var(--primary-color);
    text-decoration: none;
}

.page-content a:hover {
    text-decoration: underline;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    background-color: var(--surface-color);
    padding: 2.5rem;
    border-radius: 1rem;
    width: 90%;
    max-width: 500px;
    position: relative;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    transform: translateY(20px);
    transition: transform 0.3s ease;
    border: 1px solid var(--border-color);
}

.modal.active .modal-content {
    transform: translateY(0);
}

.close-modal {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.2s;
}

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

.modal-content h2 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.modal-content p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    background-color: var(--input-bg);
    color: var(--text-primary);
    font-family: inherit;
    transition: border-color 0.2s;
}

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

.btn-block {
    width: 100%;
    text-align: center;
}