:root {
    --color-bg: #0a0a0f;
    --color-surface: #1a1a2e;
    --color-surface-hover: #252540;
    --color-accent: #00b4d8;
    --color-accent-hover: #0096c7;
    --color-text: #e0e0e8;
    --color-text-secondary: #8888a0;
    --color-risk-low: #4ade80;
    --color-risk-medium: #facc15;
    --color-risk-high: #f87171;
    --font-stack: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', sans-serif;
    --max-width: 1100px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-stack);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--color-accent);
    text-decoration: none;
}

a:hover {
    color: var(--color-accent-hover);
}

/* ---- NAV ---- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 16px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: -0.5px;
    text-decoration: none;
}

.nav-logo:hover {
    color: var(--color-accent);
}

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

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

.nav-links a {
    color: var(--color-text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

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

.nav-cta {
    background: var(--color-accent) !important;
    color: var(--color-bg) !important;
    padding: 8px 20px;
    border-radius: 8px;
    font-weight: 600 !important;
    transition: background 0.2s !important;
}

.nav-cta:hover {
    background: var(--color-accent-hover) !important;
}


/* ---- HERO ---- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    text-align: center;
    padding: 180px 32px 80px;
}

.hero-inner {
    max-width: 900px;
}

.hero-logo {
    margin-bottom: 32px;
}

.hero-logo img {
    width: 200px;
    height: auto;
    filter: drop-shadow(0 0 40px rgba(0, 180, 216, 0.15));
    animation: float 4s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 20px;
    background: rgba(0, 180, 216, 0.1);
    color: var(--color-accent);
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 24px;
    border: 1px solid rgba(0, 180, 216, 0.2);
}

.hero h1 {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1.5px;
    margin-bottom: 20px;
}

.hero h1 span {
    background: linear-gradient(135deg, var(--color-accent), #48cae4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 18px;
    color: var(--color-text-secondary);
    max-width: 520px;
    margin: 0 auto 36px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    background: var(--color-accent);
    color: var(--color-bg);
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font-stack);
}

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

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    background: transparent;
    color: var(--color-text);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font-stack);
}

.btn-secondary:hover {
    border-color: rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.04);
    color: var(--color-text);
}

/* ---- APP PREVIEW (Redesigned as GUI mockup) ---- */
.app-preview {
    margin-top: 60px;
    perspective: 1000px;
}

.app-window {
    border-radius: 14px;
    overflow: hidden;
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.08),
        0 20px 60px rgba(0, 0, 0, 0.5),
        0 0 80px rgba(0, 180, 216, 0.08);
    transform: rotateX(2deg);
    transition: transform 0.4s ease;
}

.app-window:hover {
    transform: rotateX(0deg);
}

.app-titlebar {
    background: #2a2a3e;
    padding: 12px 16px;
    display: flex;
    align-items: center;
}

.app-titlebar-dots {
    display: flex;
    gap: 8px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot-red { background: #ff5f57; }
.dot-yellow { background: #febc2e; }
.dot-green { background: #28c840; }

.app-titlebar-title {
    flex: 1;
    text-align: center;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-secondary);
    letter-spacing: -0.3px;
}

.app-titlebar-spacer {
    width: 52px;
}

.app-body {
    display: flex;
    background: var(--color-bg);
    min-height: 320px;
}

/* Sidebar */
.app-sidebar {
    width: 200px;
    background: #111120;
    border-right: 1px solid rgba(255, 255, 255, 0.06);
    padding: 12px 0;
    flex-shrink: 0;
}

.sidebar-item {
    padding: 8px 16px;
    font-size: 13px;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: default;
    transition: background 0.15s;
}

.sidebar-item.active {
    background: rgba(0, 180, 216, 0.12);
    color: var(--color-accent);
    border-radius: 6px;
    margin: 0 8px;
    padding: 8px 8px;
}

.sidebar-item.highlight .sidebar-size {
    color: var(--color-risk-medium);
}

.sidebar-icon {
    font-size: 11px;
    opacity: 0.7;
}

.sidebar-size {
    margin-left: auto;
    font-size: 11px;
    opacity: 0.6;
    font-family: 'SF Mono', 'Fira Code', monospace;
}

.sidebar-section {
    padding: 16px 16px 6px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: rgba(255, 255, 255, 0.25);
}

/* Main content */
.app-main {
    flex: 1;
    padding: 24px;
}

.app-stats {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.stat-card {
    flex: 1;
    padding: 16px;
    border-radius: 10px;
    text-align: center;
}

.stat-cyan {
    background: rgba(0, 180, 216, 0.08);
    border: 1px solid rgba(0, 180, 216, 0.15);
}

.stat-orange {
    background: rgba(251, 146, 60, 0.08);
    border: 1px solid rgba(251, 146, 60, 0.15);
}

.stat-purple {
    background: rgba(168, 85, 247, 0.08);
    border: 1px solid rgba(168, 85, 247, 0.15);
}

.stat-value {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.stat-cyan .stat-value { color: var(--color-accent); }
.stat-orange .stat-value { color: #fb923c; }
.stat-purple .stat-value { color: #a855f7; }

.stat-label {
    font-size: 11px;
    color: var(--color-text-secondary);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.app-actions {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.mock-btn {
    flex: 1;
    padding: 10px;
    border: none;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    font-family: var(--font-stack);
    cursor: default;
}

.mock-scan {
    background: var(--color-accent);
    color: var(--color-bg);
}

.mock-clean {
    background: var(--color-risk-high);
    color: white;
}

.app-results {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.result-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 8px;
    font-size: 13px;
    transition: background 0.15s;
}

.result-row:hover {
    background: rgba(255, 255, 255, 0.04);
}

.risk-badge {
    font-size: 10px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    flex-shrink: 0;
    width: 42px;
    text-align: center;
}

.risk-low {
    background: rgba(74, 222, 128, 0.12);
    color: var(--color-risk-low);
}

.risk-med {
    background: rgba(250, 204, 21, 0.12);
    color: var(--color-risk-medium);
}

.result-name {
    flex: 1;
    color: var(--color-text);
}

.result-size {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-weight: 600;
    font-size: 13px;
    color: var(--color-text);
    min-width: 80px;
    text-align: right;
}

.result-count {
    font-size: 12px;
    color: var(--color-text-secondary);
    min-width: 70px;
    text-align: right;
}

/* ---- FEATURES ---- */
.features {
    padding: 100px 32px;
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
}

.section-header h2 {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 12px;
}

.section-header p {
    color: var(--color-text-secondary);
    font-size: 16px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.feature-card {
    padding: 28px;
    background: var(--color-surface);
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: border-color 0.3s, transform 0.3s;
}

.feature-card:hover {
    border-color: rgba(0, 180, 216, 0.2);
    transform: translateY(-2px);
}

.feature-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ---- HOW IT WORKS ---- */
.how-it-works {
    padding: 100px 32px;
    background: var(--color-surface);
}

.steps {
    display: flex;
    gap: 40px;
    max-width: var(--max-width);
    margin: 0 auto;
    justify-content: center;
    flex-wrap: wrap;
}

.step {
    text-align: center;
    flex: 1;
    min-width: 220px;
    max-width: 300px;
}

.step-number {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: rgba(0, 180, 216, 0.1);
    color: var(--color-accent);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 20px;
    border: 2px solid rgba(0, 180, 216, 0.2);
}

.step h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.step p {
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* ---- PRICING ---- */
.pricing {
    padding: 100px 32px;
}

.pricing-card {
    max-width: 420px;
    margin: 0 auto;
    background: var(--color-surface);
    border-radius: 18px;
    padding: 40px;
    text-align: center;
    border: 1px solid rgba(0, 180, 216, 0.15);
    position: relative;
    overflow: hidden;
}

.pricing-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), #48cae4);
}

.pricing-label {
    font-size: 14px;
    color: var(--color-text-secondary);
    font-weight: 500;
    margin-bottom: 8px;
}

.pricing-price {
    font-size: 52px;
    font-weight: 800;
    letter-spacing: -2px;
    margin-bottom: 4px;
}

.pricing-price span {
    font-size: 18px;
    font-weight: 500;
    color: var(--color-text-secondary);
    letter-spacing: 0;
}

.pricing-note {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-bottom: 28px;
}

.pricing-features {
    list-style: none;
    text-align: left;
    margin-bottom: 32px;
}

.pricing-features li {
    padding: 10px 0;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.pricing-features li::before {
    content: '\2713';
    color: var(--color-accent);
    font-weight: 700;
    font-size: 16px;
    flex-shrink: 0;
}

.pricing-card .btn-primary {
    width: 100%;
    justify-content: center;
    padding: 16px;
    font-size: 17px;
}

/* ---- COMPATIBILITY ---- */
.compatibility {
    padding: 100px 32px;
    background: var(--color-surface);
}

.compat-card {
    max-width: 560px;
    margin: 0 auto;
    text-align: center;
}

.compat-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.9;
}

.compat-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
}

.compat-description {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

.compat-versions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 28px;
}

.compat-version {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    border-radius: 12px;
    text-align: left;
}

.compat-version div {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.compat-version strong {
    font-size: 15px;
    font-weight: 600;
}

.compat-version span {
    font-size: 13px;
    color: var(--color-text-secondary);
}

.compat-version.supported {
    background: rgba(74, 222, 128, 0.06);
    border: 1px solid rgba(74, 222, 128, 0.15);
}

.compat-version.unsupported {
    background: rgba(248, 113, 113, 0.06);
    border: 1px solid rgba(248, 113, 113, 0.12);
}

.compat-check {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-risk-low);
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(74, 222, 128, 0.1);
    border-radius: 50%;
}

.compat-x {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-risk-high);
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(248, 113, 113, 0.1);
    border-radius: 50%;
}

.compat-note {
    font-size: 13px;
    color: var(--color-text-secondary);
    padding: 16px;
    background: rgba(0, 180, 216, 0.06);
    border: 1px solid rgba(0, 180, 216, 0.1);
    border-radius: 10px;
    line-height: 1.6;
}

/* ---- FOOTER ---- */
.footer {
    padding: 40px 32px;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 16px;
}

.footer-links a {
    font-size: 13px;
    color: var(--color-text-secondary);
    transition: color 0.2s;
}

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

.footer p {
    font-size: 13px;
    color: var(--color-text-secondary);
}

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero {
        padding: 140px 20px 60px;
    }

    .hero-logo img {
        width: 150px;
    }

    .app-sidebar {
        display: none;
    }

    .app-stats {
        flex-direction: column;
    }

    .stat-value {
        font-size: 18px;
    }

    .result-count {
        display: none;
    }

    .result-size {
        min-width: 60px;
        font-size: 12px;
    }

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

    .steps {
        flex-direction: column;
        align-items: center;
    }

    .pricing-card {
        margin: 0 16px;
    }
}

@media (max-width: 480px) {
    .app-actions {
        flex-direction: column;
    }

    .risk-badge {
        font-size: 9px;
        width: 36px;
        padding: 2px 4px;
    }
}