/* ===========================
   Design Tokens
   =========================== */
:root {
    /* Colors */
    --color-bg: #0a0a0f;
    --color-bg-secondary: #111118;
    --color-bg-card: rgba(255, 255, 255, 0.04);
    --color-bg-card-hover: rgba(255, 255, 255, 0.07);
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(255, 255, 255, 0.15);
    --color-text: #f0f0f5;
    --color-text-secondary: #9a9ab0;
    --color-text-muted: #6b6b80;

    --color-primary: hsl(190, 50%, 42%);
    --color-primary-light: hsl(190, 55%, 50%);
    --color-primary-glow: hsla(190, 55%, 50%, 0.25);

    --color-teal: hsl(175, 45%, 40%);
    --color-amber: hsl(38, 85%, 55%);
    --color-rose: hsl(350, 65%, 55%);
    --color-indigo: hsl(235, 55%, 60%);
    --color-emerald: hsl(155, 50%, 42%);
    --color-blue: hsl(210, 60%, 55%);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --section-padding: 120px 0;
    --container-max: 1200px;

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ===========================
   Reset & Base
   =========================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.65;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: var(--section-padding);
    position: relative;
}

/* ===========================
   Typography Utilities
   =========================== */
.gradient-text {
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-teal), var(--color-amber));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 72px;
}

.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-primary-light);
    background: var(--color-primary-glow);
    padding: 6px 16px;
    border-radius: 100px;
    margin-bottom: 20px;
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
}

.section-description {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ===========================
   Navigation
   =========================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition-smooth);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    padding: 10px 0;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.nav-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary-light);
    border-radius: 2px;
    transform: scaleX(0);
    transition: transform var(--transition-fast);
}

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

.nav-links a:hover::after {
    transform: scaleX(1);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* ===========================
   Button System
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    font-family: var(--font-family);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-teal));
    color: #fff;
    box-shadow: 0 4px 20px var(--color-primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px var(--color-primary-glow);
}

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

.btn-secondary:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-border-hover);
    transform: translateY(-2px);
}

/* ===========================
   Hero Section
   =========================== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg-glow {
    position: absolute;
    top: -30%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(ellipse, var(--color-primary-glow) 0%, transparent 70%);
    opacity: 0.6;
    pointer-events: none;
    animation: pulseGlow 6s ease-in-out infinite alternate;
}

@keyframes pulseGlow {
    0% {
        opacity: 0.4;
        transform: translateX(-50%) scale(1);
    }

    100% {
        opacity: 0.7;
        transform: translateX(-50%) scale(1.15);
    }
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-amber);
    background: hsla(38, 85%, 55%, 0.12);
    border: 1px solid hsla(38, 85%, 55%, 0.2);
    padding: 8px 16px;
    border-radius: 100px;
    margin-bottom: 24px;
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 3.8rem);
    font-weight: 800;
    line-height: 1.12;
    letter-spacing: -0.04em;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    max-width: 520px;
    margin-bottom: 36px;
}

.hero-cta-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: center;
}

.app-store-badge {
    display: inline-flex;
    align-items: center;
    transition: all var(--transition-fast);
    border-radius: var(--radius-md);
}

.app-store-badge img {
    height: 48px;
    width: auto;
}

.app-store-badge:hover {
    transform: translateY(-2px);
    filter: brightness(1.15);
}

/* Screenshot Styles */
.hero-screenshot {
    width: 615px;
    margin: 0 auto;
    border-radius: var(--radius-xl);
    display: block;
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.5),
        0 0 80px var(--color-primary-glow);
    border: 1px solid var(--color-border);
}

.share-screenshot {
    width: 260px;
    border-radius: var(--radius-xl);
    display: block;
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.5),
        0 0 80px var(--color-primary-glow);
    border: 1px solid var(--color-border);
}

.hero-visual {
    position: relative;
}

/* Floating Cards */
.floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(20, 20, 30, 0.9);
    backdrop-filter: blur(16px);
    border: 1px solid var(--color-border);
    padding: 14px 18px;
    border-radius: var(--radius-md);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    animation: floatCard 4s ease-in-out infinite alternate;
    z-index: 3;
}

.floating-card-icon {
    font-size: 1.5rem;
}

.floating-card strong {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
}

.floating-card span {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.floating-card-1 {
    top: 10%;
    right: -30px;
    animation-delay: 0s;
}

.floating-card-2 {
    bottom: 15%;
    left: -20px;
    animation-delay: 2s;
}

@keyframes floatCard {
    0% {
        transform: translateY(0);
    }

    100% {
        transform: translateY(-12px);
    }
}

/* Hero Scroll Indicator */
.hero-scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--color-text-muted);
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    50% {
        transform: translateX(-50%) translateY(8px);
    }
}

/* ===========================
   Features Grid
   =========================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: all var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-primary-light), transparent);
    opacity: 0;
    transition: opacity var(--transition-smooth);
}

.feature-card:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon-wrapper {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon-blue {
    background: hsla(210, 60%, 55%, 0.15);
    color: var(--color-blue);
}

.feature-icon-teal {
    background: hsla(175, 45%, 40%, 0.15);
    color: var(--color-teal);
}

.feature-icon-amber {
    background: hsla(38, 85%, 55%, 0.15);
    color: var(--color-amber);
}

.feature-icon-rose {
    background: hsla(350, 65%, 55%, 0.15);
    color: var(--color-rose);
}

.feature-icon-indigo {
    background: hsla(235, 55%, 60%, 0.15);
    color: var(--color-indigo);
}

.feature-icon-emerald {
    background: hsla(155, 50%, 42%, 0.15);
    color: var(--color-emerald);
}

.feature-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.feature-card p {
    font-size: 0.93rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
}

/* ===========================
   How It Works (Steps)
   =========================== */
.how-it-works {
    background: var(--color-bg-secondary);
}

.steps-container {
    max-width: 800px;
    margin: 0 auto;
}

.step-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 40px;
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto auto;
    gap: 0 28px;
    transition: all var(--transition-smooth);
}

.step-card:hover {
    border-color: var(--color-border-hover);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.step-number {
    grid-row: 1 / 3;
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-teal));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-weight: 800;
    color: #fff;
    flex-shrink: 0;
}

.step-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.step-content p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
}

.step-visual {
    grid-column: 1 / -1;
    margin-top: 24px;
}

.step-image {
    width: 100%;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.step-connector {
    display: flex;
    justify-content: center;
    padding: 20px 0;
    color: var(--color-text-muted);
}

/* Follow-up Demo */
.followup-demo {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.demo-question,
.demo-answer {
    display: flex;
    gap: 10px;
    font-size: 0.93rem;
    line-height: 1.6;
}

.demo-label {
    font-weight: 700;
    color: var(--color-primary-light);
    flex-shrink: 0;
}

.demo-answer span {
    color: var(--color-text-secondary);
}

/* ===========================
   Share Extension
   =========================== */
.share-extension-layout {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 80px;
    align-items: center;
}

.share-extension-content h2 {
    font-size: clamp(2rem, 3.5vw, 2.8rem);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
}

.share-extension-content>p {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

.share-benefits {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.share-benefit {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

.share-benefit svg {
    color: var(--color-emerald);
    flex-shrink: 0;
    margin-top: 2px;
}



.share-extension-visual {
    display: flex;
    justify-content: center;
}

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

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

.privacy-icon {
    width: 88px;
    height: 88px;
    border-radius: 50%;
    background: hsla(155, 50%, 42%, 0.12);
    color: var(--color-emerald);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 28px;
}

.privacy-card h2 {
    font-size: clamp(2rem, 3.5vw, 2.6rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 12px;
}

.privacy-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: 48px;
}

.privacy-details {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    text-align: left;
}

.privacy-item {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    transition: all var(--transition-smooth);
}

.privacy-item:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-2px);
}

.privacy-item-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: hsla(155, 50%, 42%, 0.12);
    color: var(--color-emerald);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.privacy-item h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.privacy-item p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
}

/* ===========================
   Contact Section
   =========================== */
.contact-card {
    max-width: 500px;
    margin: 0 auto;
    text-align: center;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 48px 40px;
}

.contact-icon {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--color-primary-glow);
    color: var(--color-primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.contact-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.contact-card>p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    margin-bottom: 28px;
}

.contact-btn {
    justify-content: center;
    width: 100%;
}

/* ===========================
   Footer
   =========================== */
.footer {
    padding: 48px 0;
    border-top: 1px solid var(--color-border);
}

.footer-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-icon {
    width: 28px;
    height: 28px;
    border-radius: 8px;
}

.footer-name {
    font-size: 1.1rem;
    font-weight: 700;
}

.footer-links {
    display: flex;
    gap: 28px;
}

.footer-links a {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

.footer-copy {
    font-size: 0.82rem;
    color: var(--color-text-muted);
}

/* ===========================
   Scroll Reveal Animations
   =========================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
    }

    .hero-content {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-cta-group {
        justify-content: center;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .share-extension-layout {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .share-extension-visual {
        order: -1;
    }

    .privacy-details {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 80px 0;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(10, 10, 15, 0.97);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 36px;
        z-index: 999;
    }

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

    .nav-links a {
        font-size: 1.3rem;
    }

    .nav-toggle {
        display: flex;
        z-index: 1001;
    }

    .nav-toggle.open span:nth-child(1) {
        transform: rotate(45deg) translateY(5px) translateX(3px);
    }

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

    .nav-toggle.open span:nth-child(3) {
        transform: rotate(-45deg) translateY(-5px) translateX(3px);
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .step-card {
        padding: 28px 20px;
    }

    .floating-card {
        display: none;
    }

    .hero-screenshot {
        width: 240px;
    }

    .share-screenshot {
        width: 220px;
    }

    .contact-card {
        padding: 32px 24px;
    }
}

@media (max-width: 480px) {
    .hero-cta-group {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        justify-content: center;
        width: 100%;
    }
}