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

:root {
    --bg: #07070a;
    --surface: #0d0d12;
    --border: rgba(255, 255, 255, 0.08);
    --text: #f8f8fb;
    --muted: #9999a7;
    --purple: #8b5cf6;
    --purple-light: #a78bfa;
    --purple-dark: #6d42d8;
    --green: #34d399;
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    background:
        radial-gradient(circle at 50% -20%, rgba(139, 92, 246, 0.2), transparent 40%),
        radial-gradient(circle at 90% 50%, rgba(109, 66, 216, 0.08), transparent 35%),
        var(--bg);
    color: var(--text);
    font-family: Inter, "Segoe UI", Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}

body.light {
    --bg: #f6f4ff;
    --surface: #ffffff;
    --border: rgba(20, 16, 40, 0.1);
    --text: #16151d;
    --muted: #5f5e6c;
}

a {
    color: inherit;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 7%;
    background: rgba(7, 7, 10, 0.72);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(18px);
}

body.light .navbar {
    background: rgba(246, 244, 255, 0.82);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-decoration: none;
}

.logo-mark {
    width: 34px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--purple-light), var(--purple-dark));
    box-shadow: 0 0 25px rgba(139, 92, 246, 0.3);
}

.desktop-nav {
    display: flex;
    gap: 28px;
}

.desktop-nav a {
    color: var(--muted);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.icon-button,
.mobile-menu {
    width: 38px;
    height: 38px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
    cursor: pointer;
}

.nav-download,
.primary-button,
.secondary-button,
.download-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 16px;
    border-radius: 10px;
    text-decoration: none;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    border: 0;
}

.nav-download,
.primary-button,
.download-button {
    color: white;
    background: linear-gradient(135deg, var(--purple-light), var(--purple-dark));
    box-shadow: 0 10px 35px rgba(139, 92, 246, 0.22);
}

.secondary-button {
    color: var(--text);
    background: rgba(255, 255, 255, 0.045);
    border: 1px solid var(--border);
}

.download-button.disabled {
    opacity: 0.45;
    cursor: not-allowed;
    box-shadow: none;
}

.mobile-menu {
    display: none;
}

.mobile-nav {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    z-index: 90;
    padding: 16px 7%;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.mobile-nav.open {
    display: grid;
    gap: 14px;
}

.mobile-nav a {
    text-decoration: none;
    color: var(--text);
}

.hero {
    position: relative;
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 140px 7% 80px;
    text-align: center;
}

.hero-background {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 0%, rgba(139, 92, 246, 0.18), transparent 55%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    max-width: 860px;
    z-index: 2;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    margin-bottom: 24px;
    color: var(--purple-light);
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    background: rgba(139, 92, 246, 0.08);
    border: 1px solid rgba(139, 92, 246, 0.18);
    border-radius: 30px;
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 10px rgba(52, 211, 153, 0.8);
}

.hero h1 {
    font-size: clamp(48px, 7vw, 88px);
    line-height: 0.98;
    letter-spacing: -0.065em;
}

.hero h1 span,
.section-heading h2 span,
.experience h2 span,
.download-card h2 span {
    color: var(--purple-light);
}

.hero-description {
    max-width: 640px;
    margin: 22px auto 0;
    color: var(--muted);
    font-size: 17px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 32px;
    flex-wrap: wrap;
}

.platforms {
    margin-top: 22px;
    color: var(--muted);
    font-size: 12px;
    display: flex;
    gap: 8px;
    justify-content: center;
}

.app-preview {
    width: min(1100px, 100%);
    margin-top: 64px;
    overflow: hidden;
    background: #0b0b10;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 18px;
    box-shadow: 0 40px 100px rgba(0, 0, 0, 0.55);
    text-align: left;
}

.window-bar {
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 15px;
    background: #101017;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    color: var(--muted);
    font-size: 12px;
}

.window-dots {
    display: flex;
    gap: 6px;
}

.window-dots span {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: #34343d;
}

.preview-body {
    display: grid;
    grid-template-columns: 72px 1fr;
    min-height: 420px;
}

.preview-sidebar {
    display: grid;
    justify-items: center;
    align-content: start;
    gap: 12px;
    padding: 18px 0;
    background: #0c0c11;
    border-right: 1px solid rgba(255, 255, 255, 0.06);
}

.preview-logo,
.preview-nav {
    width: 36px;
    height: 36px;
    display: grid;
    place-items: center;
    border-radius: 10px;
    color: #777784;
}

.preview-nav.active,
.preview-logo {
    color: white;
    background: rgba(139, 92, 246, 0.16);
}

.preview-content {
    padding: 28px;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.preview-header small {
    color: var(--purple-light);
    font-size: 10px;
    letter-spacing: 0.14em;
}

.online {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--green);
    font-size: 12px;
}

.online span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--green);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-top: 24px;
}

.stat-card {
    padding: 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 10px;
}

.stat-card span {
    color: var(--muted);
    font-size: 11px;
}

.stat-card strong {
    display: block;
    margin: 8px 0;
    font-size: 24px;
}

.progress {
    height: 4px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    overflow: hidden;
}

.progress i {
    display: block;
    height: 100%;
    background: linear-gradient(90deg, #6366f1, #a78bfa);
}

.preview-terminal {
    margin-top: 18px;
    background: #07070c;
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    overflow: hidden;
}

.terminal-header {
    display: flex;
    justify-content: space-between;
    padding: 10px 14px;
    color: var(--muted);
    font-size: 11px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.terminal-code {
    padding: 14px;
    font-family: Consolas, "Courier New", monospace;
    font-size: 13px;
    line-height: 1.7;
}

.terminal-success {
    color: var(--green);
}

.cursor {
    display: inline-block;
    width: 8px;
    height: 14px;
    background: var(--purple-light);
    margin-left: 4px;
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    50% { opacity: 0; }
}

.section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 110px 7%;
}

.section-heading,
.experience-content {
    max-width: 680px;
}

.eyebrow {
    color: var(--purple-light);
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.14em;
}

.section h2,
.experience h2,
.download-card h2 {
    margin-top: 10px;
    font-size: clamp(32px, 5vw, 52px);
    letter-spacing: -0.05em;
}

.section-heading p,
.experience-content p {
    margin-top: 14px;
    color: var(--muted);
    line-height: 1.7;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin-top: 40px;
}

.feature-card {
    padding: 24px;
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.01));
    border: 1px solid var(--border);
    border-radius: 14px;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(139, 92, 246, 0.25);
}

.feature-icon {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    margin-bottom: 16px;
    color: var(--purple-light);
    background: rgba(139, 92, 246, 0.1);
    border-radius: 10px;
}

.feature-card p {
    margin-top: 8px;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.65;
}

.experience {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 40px;
    align-items: center;
}

.check-list {
    margin-top: 24px;
    list-style: none;
    display: grid;
    gap: 12px;
}

.check-list li {
    display: flex;
    gap: 10px;
    color: var(--text);
}

.check-list span {
    color: var(--green);
}

.experience-card {
    position: relative;
    min-height: 280px;
    display: grid;
    place-content: center;
    text-align: center;
    border: 1px solid var(--border);
    border-radius: 20px;
    overflow: hidden;
    background: var(--surface);
}

.orb {
    position: absolute;
    inset: 20%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.35), transparent 70%);
    filter: blur(20px);
}

.experience-icon {
    position: relative;
    font-size: 42px;
}

.download-section {
    padding: 0 7% 80px;
}

.download-card {
    max-width: 1100px;
    margin: 0 auto;
    padding: 70px 40px;
    text-align: center;
    background: radial-gradient(circle at center, rgba(139, 92, 246, 0.12), transparent 65%), var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
}

.download-card p {
    max-width: 560px;
    margin: 14px auto 28px;
    color: var(--muted);
}

.download-options {
    display: grid;
    gap: 12px;
    max-width: 640px;
    margin: 0 auto;
}

.download-option {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 16px 18px;
    border: 1px solid var(--border);
    border-radius: 12px;
    text-align: left;
}

.download-platform span {
    display: block;
    color: var(--muted);
    font-size: 12px;
    margin-top: 4px;
}

.download-status {
    margin-top: 18px;
    color: var(--muted);
    font-size: 13px;
}

.faq-list {
    max-width: 760px;
    margin: 30px auto 0;
}

.faq-item {
    border-bottom: 1px solid var(--border);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 18px 0;
    background: transparent;
    border: 0;
    color: var(--text);
    font-size: 16px;
    cursor: pointer;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
}

.faq-answer p {
    padding-bottom: 18px;
    color: var(--muted);
    line-height: 1.7;
}

footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 30px 7%;
    color: #666671;
    font-size: 11px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 8px;
}

@media (max-width: 900px) {
    .desktop-nav {
        display: none;
    }

    .mobile-menu {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .feature-grid,
    .experience,
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .preview-body {
        grid-template-columns: 1fr;
    }

    .preview-sidebar {
        display: none;
    }
}

@media (max-width: 650px) {
    .hero-actions,
    .download-option,
    footer {
        flex-direction: column;
    }

    .download-button,
    .primary-button,
    .secondary-button {
        width: 100%;
    }
}

.start-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin-top: 36px;
}

.start-step {
    padding: 22px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.02);
}

.start-step span {
    color: var(--purple-light);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.12em;
}

.start-step h3 {
    margin: 10px 0 8px;
}

.start-step p {
    color: var(--muted);
    font-size: 13px;
    line-height: 1.6;
}

.copy-btn {
    margin-top: 14px;
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: rgba(139, 92, 246, 0.12);
    color: var(--text);
    cursor: pointer;
    font-weight: 700;
    font-size: 12px;
}

.shortcut-list {
    display: grid;
    gap: 10px;
    max-width: 640px;
    margin-top: 28px;
}

.shortcut-list div {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    color: var(--muted);
}

kbd {
    display: inline-block;
    padding: 3px 7px;
    margin-right: 4px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
    font-size: 11px;
}

@media (max-width: 900px) {
    .start-grid {
        grid-template-columns: 1fr;
    }
}