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

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #000;
    color: #fff;
    line-height: 1.6;
    overflow-x: hidden;
}

/* ─── Hero ───────────────────────────────────────────────────────────── */

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 4rem 2rem;
    position: relative;
    background: linear-gradient(180deg, #000 0%, #0d0d0d 100%);
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(255,255,255,0.02) 2px, rgba(255,255,255,0.02) 4px),
        repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(255,255,255,0.02) 2px, rgba(255,255,255,0.02) 4px);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 680px;
}

/* ─── Icon ───────────────────────────────────────────────────────────── */

.landing-icon {
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s ease-out;
}

.landing-icon svg {
    border-radius: 18px;
    box-shadow: 0 8px 32px rgba(255,255,255,0.06);
}

/* ─── Title ──────────────────────────────────────────────────────────── */

.hero h1 {
    font-size: 3.5rem;
    font-weight: 900;
    letter-spacing: -0.04em;
    margin-bottom: 0.75rem;
    color: #fff;
    animation: fadeInUp 0.8s ease-out;
}

.tagline {
    font-size: 1.3rem;
    font-weight: 300;
    color: rgba(255,255,255,0.6);
    margin-bottom: 2.5rem;
    animation: fadeInUp 0.8s ease-out 0.15s both;
}

.description {
    font-size: 1rem;
    color: rgba(255,255,255,0.45);
    line-height: 1.8;
    margin-bottom: 3rem;
    text-align: justify;
    animation: fadeInUp 0.8s ease-out 0.3s both;
}

/* ─── Features ───────────────────────────────────────────────────────── */

.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin-bottom: 3rem;
    animation: fadeInUp 0.8s ease-out 0.45s both;
}

.feature {
    background: linear-gradient(135deg, #111 0%, #0a0a0a 100%);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 10px;
    padding: 1.5rem 1.25rem;
    text-align: left;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.feature:hover {
    transform: translateY(-4px);
    border-color: rgba(255,255,255,0.18);
}

.feature:hover::before {
    transform: translateX(100%);
}

.feature h2 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #fff;
}

.feature h2 svg {
    flex-shrink: 0;
    opacity: 0.5;
}

.feature p {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
    line-height: 1.65;
}

/* ─── Notice ─────────────────────────────────────────────────────────── */

.notice {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 10px;
    padding: 1.25rem 1.5rem;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.notice p {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.55);
    line-height: 1.6;
}

.notice a {
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    border-bottom: 1px solid rgba(255,255,255,0.3);
    transition: border-color 0.2s;
}

.notice a:hover {
    border-color: #fff;
}

/* ─── Footer link ────────────────────────────────────────────────────── */

.hero-footer {
    margin-top: 4rem;
    animation: fadeInUp 0.8s ease-out 0.75s both;
}

.hero-footer a {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.25);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    transition: color 0.2s;
}

.hero-footer a:hover {
    color: rgba(255,255,255,0.5);
}

/* ─── Animations ─────────────────────────────────────────────────────── */

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ─── Responsive ─────────────────────────────────────────────────────── */

@media (max-width: 640px) {
    .hero { padding: 3rem 1.5rem; }
    .hero h1 { font-size: 2.2rem; }
    .tagline { font-size: 1.1rem; }
    .features { grid-template-columns: 1fr; }
}