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

:root {
    --primary-color: #2563eb;
    --secondary-color: #0ea5e9;
    --accent-color: #8b5cf6;
    --dark-bg: #0f172a;
    --darker-bg: #020617;
    --light-text: #f8fafc;
    --gray-text: #cbd5e1;
    --card-bg: #1e293b;
    --border-color: #334155;
    --success-color: #10b981;
    --warning-color: #f59e0b;
}

/* Light Mode Variables */
:root[data-theme="light"] {
    --primary-color: #2563eb;
    --secondary-color: #0ea5e9;
    --accent-color: #8b5cf6;
    --dark-bg: #f8fafc;
    transition: background-color 0.3s ease, color 0.3s ease;
    --darker-bg: #ffffff;
    --light-text: #0f172a;
    --gray-text: #475569;
    --card-bg: #f1f5f9;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --warning-color: #f59e0b;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--light-text);
    background: var(--darker-bg);
    overflow-x: hidden;
}

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

/* Header and Navigation */
header {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.navbar {
    padding: 1rem 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
    filter: drop-shadow(0 2px 8px rgba(37, 99, 235, 0.3));
}

.logo h1 {
    font-size: 1.8rem;
    color: white;
    font-weight: 700;
}

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

.nav-links a {
    color: var(--gray-text);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* Theme Selector with Dropdown */
.theme-selector {
    position: relative;
    margin-left: 1rem;
}

.theme-toggle {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    border-color: var(--primary-color);
    background: var(--primary-color);
}

.theme-icon {
    font-size: 20px;
    transition: transform 0.3s ease;
}

.theme-text {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--light-text);
}

.theme-toggle:hover .theme-icon {
    transform: rotate(180deg);
}

/* Theme Dropdown Menu */
.theme-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    min-width: 140px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.theme-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.theme-option {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    width: 100%;
    padding: 0.8rem 1rem;
    background: transparent;
    border: none;
    color: var(--light-text);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
}

.theme-option:first-child {
    border-radius: 6px 6px 0 0;
}

.theme-option:last-child {
    border-radius: 0 0 6px 6px;
}

.theme-option:hover {
    background: var(--primary-color);
}

.theme-option.active {
    background: var(--primary-color);
    font-weight: 600;
}

.option-icon {
    font-size: 20px;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, var(--darker-bg) 0%, var(--dark-bg) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

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

.hero-content {
    z-index: 1;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.8rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-weight: 600;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--gray-text);
    margin-bottom: 2rem;
    line-height: 1.8;
}

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

.btn {
    padding: 1rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
}

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

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

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

.btn-outline:hover {
    background: var(--light-text);
    color: var(--dark-bg);
}

.hero-image {
    z-index: 1;
}
Light mode image adjustments */
:root[data-theme="light"] .hero-screenshot,
:root[data-theme="light"] .app-screenshot {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

:root[data-theme="light"] .hero-screenshot:hover {
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

:root[data-theme="light"] .app-screenshot:hover {
    box-shadow: 0 20px 40px rgba(37, 99, 235, 0.25);
}


.hero-screenshot {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease;
}

.hero-screenshot:hover {
    transform: scale(1.05);
}

/* App Screenshots */
.app-screenshot {
    width: 100%;
    max-width: 350px;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease;
    margin: 0 auto;
    display: block;
}

.app-screenshot:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(37, 99, 235, 0.3);
}

/* Screenshot Placeholders */
.screenshot-placeholder {
    background: linear-gradient(135deg, var(--card-bg), var(--dark-bg));
    border: 2px dashed var(--border-color);
    border-radius: 20px;
    padding: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    text-align: center;
    transition: all 0.3s ease;
}

.screenshot-placeholder:hover {
    border-color: var(--primary-color);
    transform: scale(1.02);
}

.screenshot-placeholder p {
    font-size: 2rem;
    color: var(--gray-text);
}

.screenshot-placeholder.large {
    min-height: 500px;
}

/* Section Styles */
section {
    padding: 80px 0;
}

.section-title {
    font-size: 3rem;
    text-align: center;
    margin-bottom: 1rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--light-text), var(--gray-text));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    font-size: 1.3rem;
    color: var(--gray-text);
    margin-bottom: 3rem;
}

/* Hero Selling Points */
.hero-selling-points {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 1.5rem 0 2rem;
}

.hero-selling-point {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem 1.2rem;
    border-radius: 12px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hero-selling-point:nth-child(1) {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.15), rgba(251, 146, 60, 0.10));
    border-left: 4px solid #ef4444;
}

.hero-selling-point:nth-child(2) {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.15), rgba(14, 165, 233, 0.10));
    border-left: 4px solid #2563eb;
}

.hero-selling-point:nth-child(3) {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(52, 211, 153, 0.10));
    border-left: 4px solid #10b981;
}

.hero-selling-point:hover {
    transform: translateX(4px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.hero-sp-icon {
    font-size: 1.8rem;
    flex-shrink: 0;
    margin-top: 0.1rem;
}

.hero-selling-point strong {
    display: block;
    font-size: 1.1rem;
    color: var(--light-text);
    margin-bottom: 0.25rem;
}

.hero-selling-point:nth-child(1) strong { color: #f87171; }
.hero-selling-point:nth-child(2) strong { color: #60a5fa; }
.hero-selling-point:nth-child(3) strong { color: #34d399; }

.hero-selling-point p {
    color: var(--gray-text);
    font-size: 0.95rem;
    line-height: 1.5;
    margin: 0;
}

/* Light mode adjustments for selling points */
:root[data-theme="light"] .hero-selling-point:nth-child(1) {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.08), rgba(251, 146, 60, 0.05));
}
:root[data-theme="light"] .hero-selling-point:nth-child(2) {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(14, 165, 233, 0.05));
}
:root[data-theme="light"] .hero-selling-point:nth-child(3) {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.08), rgba(52, 211, 153, 0.05));
}
:root[data-theme="light"] .hero-selling-point:nth-child(1) strong { color: #dc2626; }
:root[data-theme="light"] .hero-selling-point:nth-child(2) strong { color: #2563eb; }
:root[data-theme="light"] .hero-selling-point:nth-child(3) strong { color: #059669; }

/* Features Section */
.features {
    background: var(--dark-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.2);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--light-text);
}

.feature-card p {
    color: var(--gray-text);
    line-height: 1.6;
}

/* Screenshots Section */
.screenshots {
    background: var(--darker-bg);
}

.screenshots-carousel {
    position: relative;
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 3rem;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.carousel-container {
    overflow: hidden;
    flex: 1;
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(13, 1fr);
    gap: 2rem;
    transition: transform 0.5s ease;
}

.carousel-track {
    display: flex;
    gap: 2rem;
}

.screenshot-item {
    text-align: center;
    flex: 0 0 calc(33.333% - 1.333rem);
    min-width: 0;
}

.screenshot-caption {
    margin-top: 1rem;
    font-size: 1.1rem;
    color: var(--gray-text);
    font-weight: 500;
}

/* Carousel Buttons */
.carousel-btn {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--light-text);
    font-size: 2rem;
    flex-shrink: 0;
}

.carousel-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: scale(1.1);
}

.carousel-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    transform: scale(1);
}

.carousel-btn span {
    line-height: 1;
    margin-top: -4px;
}

/* Carousel Dots */
.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
}

.carousel-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-color);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.carousel-dot:hover {
    background: var(--gray-text);
}

.carousel-dot.active {
    background: var(--primary-color);
    width: 32px;
    border-radius: 6px;
}

/* How It Works Section */
.how-it-works {
    background: var(--dark-bg);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.step {
    text-align: center;
    padding: 2rem;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0 auto 1.5rem;
}

.step h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--light-text);
}

.step p {
    color: var(--gray-text);
    line-height: 1.6;
}

/* Privacy Section */
.privacy {
    background: var(--darker-bg);
}

.privacy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.privacy-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.privacy-card:hover {
    transform: translateY(-5px);
    border-color: var(--success-color);
}

.privacy-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--light-text);
}

.privacy-card p {
    color: var(--gray-text);
    line-height: 1.6;
}

.privacy-cta {
    text-align: center;
    margin-top: 4rem;
    padding: 2rem;
}

.privacy-cta p {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--gray-text);
}

/* Technology Section */
.technology {
    background: var(--dark-bg);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.tech-item {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.tech-item:hover {
    transform: translateY(-5px);
    border-color: var(--secondary-color);
}

.tech-item h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--secondary-color);
}

.tech-item p {
    color: var(--gray-text);
}

/* Contact Section */
.contact {
    background: var(--darker-bg);
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.contact-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.contact-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.contact-card p {
    color: var(--gray-text);
}

.contact-card a {
    color: var(--secondary-color);
    text-decoration: none;
}

.contact-card a:hover {
    text-decoration: underline;
}

/* Footer */
footer {
    backlogo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 1rem;
}

.footer-icon {
    width: 36px;
    height: 36px;
    filter: drop-shadow(0 2px 6px rgba(37, 99, 235, 0.3));
}

.footer-ground: var(--darker-bg);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 1rem;
}

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

.footer-section h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-section h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--light-text);
}

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

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

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

.footer-section ul li a {
    color: var(--gray-text);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.company-info {
    font-size: 1.1rem;
    margin-top: 0.5rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--gray-text);
}

.footer-bottom p {
    margin: 0.5rem 0;
}

/* Responsive Design */
@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-title {
        font-size: 3rem;
    }

    .nav-links {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }

    .section-title {
        font-size: 2.5rem;
    }

    .cta-buttons {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .navbar .container {
        gap: 0.5rem;
    }

    .logo h1 {
        font-size: 1.3rem;
    }

    .logo-icon {
        width: 32px;
        height: 32px;
    }

    .theme-text {
        display: none;
    }

    .theme-toggle {
        padding: 0.4rem 0.6rem;
    }

    .theme-selector {
        margin-left: auto;
    }

    .language-select {
        padding: 0.4rem 1.5rem 0.4rem 0.5rem;
        font-size: 0.85rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.4rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .features-grid,
    .privacy-grid,
    .tech-grid,
    .contact-info {
        grid-template-columns: 1fr;
    }

    .screenshot-item {
        flex: 0 0 100%;
    }

    .carousel-btn {
        width: 45px;
        height: 45px;
        font-size: 1.8rem;
    }

    .screenshot-placeholder {
        min-height: 300px;
    }

    .screenshot-placeholder.large {
        min-height: 350px;
    }

    .nav-links {
        font-size: 0.9rem;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card,
.privacy-card,
.tech-item,
.contact-card {
    animation: fadeInUp 0.6s ease-out;
}