/* ============================================
   Threat Defender — Landing Page Styles
   Design System: Dark theme, red accent (#ef4444)
   Matching MalDoc app aesthetic
   ============================================ */

:root {
    --bg: #09090b;
    --bg-elevated: #111113;
    --bg-card: #18181b;
    --border: #27272a;
    --text: #fafafa;
    --text-muted: #a1a1aa;
    --text-dim: #71717a;
    --accent: #ef4444;
    --accent-hover: #dc2626;
    --accent-glow: rgba(239, 68, 68, 0.15);
    --accent-glow-strong: rgba(239, 68, 68, 0.3);
    --green: #22c55e;
    --blue: #3b82f6;
    --purple: #8b5cf6;
    --orange: #f97316;
    --radius: 0.625rem;
    --radius-lg: 1rem;
    --transition: 0.2s ease;
}

/* ---- Reset ---- */
*, *::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: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

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

img { max-width: 100%; }

/* ---- Grain Overlay ---- */
.grain {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

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

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--transition);
    white-space: nowrap;
}

.btn-accent {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 0 20px var(--accent-glow);
}
.btn-accent:hover {
    background: var(--accent-hover);
    box-shadow: 0 0 30px var(--accent-glow-strong);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-outline:hover {
    border-color: var(--text-muted);
    background: rgba(255,255,255,0.03);
}

.btn-lg {
    padding: 0.75rem 1.75rem;
    font-size: 0.95rem;
}

.btn-sm {
    padding: 0.4rem 1rem;
    font-size: 0.8rem;
}

/* ---- Navbar ---- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0.75rem 0;
    background: rgba(9, 9, 11, 0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition);
}

.navbar.scrolled {
    border-bottom-color: var(--border);
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.brand-icon {
    color: var(--accent);
}

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

.nav-links a {
    font-size: 0.875rem;
    color: var(--text-muted);
    transition: color var(--transition);
    font-weight: 500;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all 0.3s;
}

.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: rgba(9, 9, 11, 0.95);
    backdrop-filter: blur(16px);
    padding: 1.5rem 2rem;
    flex-direction: column;
    gap: 1rem;
    z-index: 999;
    border-bottom: 1px solid var(--border);
}

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

.mobile-menu a {
    font-size: 1rem;
    color: var(--text-muted);
    padding: 0.5rem 0;
    font-weight: 500;
}

.mobile-menu a:hover {
    color: var(--text);
}

/* ---- Hero ---- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 8rem 0 6rem;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
}

.hero-glow-1 {
    width: 500px;
    height: 500px;
    background: rgba(239, 68, 68, 0.08);
    top: 10%;
    left: 20%;
}

.hero-glow-2 {
    width: 400px;
    height: 400px;
    background: rgba(139, 92, 246, 0.06);
    bottom: 20%;
    right: 15%;
}

.hero-glow-3 {
    width: 300px;
    height: 300px;
    background: rgba(59, 130, 246, 0.05);
    top: 40%;
    right: 30%;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: 9999px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 2rem;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.05;
    letter-spacing: -0.04em;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent), var(--orange), var(--accent));
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% { background-position: 0% center; }
    50% { background-position: 200% center; }
}

.hero-desc {
    font-size: 1.125rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 2.5rem;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

.hero-ctas {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ---- Animations ---- */
.animate-fade {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.7s ease forwards;
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ---- Stats ---- */
.stats {
    padding: 4rem 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    background: var(--bg-elevated);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text);
    font-variant-numeric: tabular-nums;
}

.stat-suffix {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
    font-weight: 500;
}

/* ---- Section Headers ---- */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
    margin-bottom: 0.75rem;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
}

.section-desc {
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ---- Services ---- */
.services {
    padding: 6rem 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: all 0.3s ease;
    position: relative;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.service-card:hover {
    transform: translateY(-2px);
    border-color: rgba(239, 68, 68, 0.3);
}

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

.service-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(239, 68, 68, 0.08);
    border-radius: var(--radius);
    margin-bottom: 1.25rem;
}

.service-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin-bottom: 0.75rem;
}

.service-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ---- Product ---- */
.product {
    padding: 6rem 0;
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.product-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.product-tagline {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
}

.product-desc {
    font-size: 1rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.product-benefits {
    list-style: none;
    margin-bottom: 2rem;
}

.product-benefits li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.5rem 0;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.product-benefits li svg {
    flex-shrink: 0;
    margin-top: 3px;
}

.product-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.feature-card {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.feature-card:hover {
    border-color: rgba(239, 68, 68, 0.3);
}

.feature-icon-sm {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: rgba(255,255,255,0.03);
    border-radius: 8px;
}

.feature-card strong {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.15rem;
}

.feature-card span {
    display: block;
    font-size: 0.75rem;
    color: var(--text-dim);
    line-height: 1.4;
}

/* ---- CTA Section ---- */
.cta-section {
    padding: 6rem 0;
}

.cta-box {
    text-align: center;
    padding: 4rem 3rem;
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.06), rgba(139, 92, 246, 0.04));
    border: 1px solid rgba(239, 68, 68, 0.15);
    border-radius: var(--radius-lg);
}

.cta-box h2 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 0.75rem;
}

.cta-box p {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

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

/* ---- Contact ---- */
.contact {
    padding: 6rem 0;
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
}

.contact-layout {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: start;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
}

.optional {
    font-weight: 400;
    color: var(--text-dim);
}

.form-group input,
.form-group textarea {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.7rem 1rem;
    font-family: inherit;
    font-size: 0.9rem;
    color: var(--text);
    transition: border-color var(--transition);
    outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-dim);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-feedback {
    font-size: 0.85rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    display: none;
}

.form-feedback.success {
    display: block;
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: var(--green);
}

.form-feedback.error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--accent);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    padding-top: 2rem;
}

.contact-info-card {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.contact-info-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(239, 68, 68, 0.08);
    border-radius: var(--radius);
    color: var(--accent);
    flex-shrink: 0;
}

.contact-info-card strong {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.15rem;
}

.contact-info-card span,
.contact-info-card a {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.contact-info-card a:hover {
    color: var(--accent);
}

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

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    padding-bottom: 3rem;
}

.footer-brand .nav-brand {
    margin-bottom: 1rem;
}

.footer-tagline {
    font-size: 0.85rem;
    color: var(--text-dim);
    line-height: 1.6;
    max-width: 280px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer-col h4 {
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text);
}

.footer-col a {
    display: block;
    font-size: 0.8rem;
    color: var(--text-dim);
    padding: 0.25rem 0;
    transition: color var(--transition);
}

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

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-dim);
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .product-layout {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .product-features {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-actions .btn { display: none; }
    .hamburger { display: flex; }

    .hero { padding: 7rem 0 4rem; min-height: auto; }
    .hero-title { font-size: 2.25rem; }
    .hero-desc { font-size: 1rem; }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .stat-number { font-size: 2rem; }

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

    .services, .product, .cta-section, .contact { padding: 4rem 0; }
    .section-title { font-size: 1.75rem; }
    .section-header { margin-bottom: 2.5rem; }

    .contact-layout {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .contact-info { padding-top: 0; }

    .form-row {
        grid-template-columns: 1fr;
    }

    .cta-box { padding: 3rem 1.5rem; }
    .cta-box h2 { font-size: 1.5rem; }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

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

    .product-tagline { font-size: 1.5rem; }
}

@media (max-width: 480px) {
    .container { padding: 0 1.25rem; }

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

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

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

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

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

    .footer-links {
        grid-template-columns: 1fr;
    }
}