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

:root {
    --green:  #2ECC71;
    --green2: #145C2B;
    --accent: #94E5DC;
    --white:  #ffffff;
    --dark:   #0A0C0E;
    --panel:  #101512;
    --card:   rgba(46,204,113,0.08);
    --line:   rgba(46,204,113,0.18);
}

html, body {
    height: 100%;
}

body {
    font-family: 'Share Tech Mono', monospace;
    background: var(--dark);
    color: var(--white);
    overflow-x: hidden;
}

/* Landing page only (index.html) — locked to one viewport, never scrolls */
body.landing {
    overflow: hidden;
}

/* ── Nav ── */
nav {
    background: rgba(0,0,0,0.3);
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--line);
}

nav a.brand {
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--white);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

nav a.brand span { color: var(--green); }

nav a.back {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.6);
    text-decoration: none;
}

nav a.back:hover { color: var(--white); }

/* ── Footer ── */
footer {
    background: rgba(0,0,0,0.4);
    text-align: center;
    padding: 32px 24px;
    font-size: 0.85rem;
    opacity: 0.6;
    border-top: 1px solid var(--line);
}

footer a { color: var(--green); }

/* ── Store button ── */
.store-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: clamp(16px, 3vh, 40px);
    padding: clamp(10px, 1.8vh, 16px) clamp(20px, 3vw, 32px);
    background: var(--green);
    color: var(--dark);
    font-family: 'Share Tech Mono', monospace;
    font-weight: 700;
    font-size: clamp(0.85rem, 1.8vh, 1.05rem);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border-radius: 4px;
    text-decoration: none;
    box-shadow: 0 4px 24px rgba(46,204,113,0.3);
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
}

.store-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(46,204,113,0.4);
}

.store-btn.disabled {
    background: transparent;
    color: var(--green);
    border: 1px solid var(--green);
    box-shadow: none;
    cursor: default;
    pointer-events: none;
}

.store-btn svg { width: 22px; height: 22px; }

/* ── Landing page (single viewport, no scroll) ── */
.page {
    height: 100vh;
    background:
        repeating-linear-gradient(0deg, rgba(46,204,113,0.03) 0px, rgba(46,204,113,0.03) 1px, transparent 1px, transparent 3px),
        radial-gradient(ellipse at center, #10201a 0%, #0A0C0E 70%);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(24px, 6vw, 90px);
    padding: clamp(12px, 3vh, 40px) clamp(20px, 5vw, 64px);
}

.panel-text {
    max-width: 420px;
    flex: 0 1 420px;
}

.brand-row {
    display: flex;
    align-items: center;
    gap: 14px;
}

.brand-icon {
    width: clamp(40px, 6vh, 56px);
    height: clamp(40px, 6vh, 56px);
    border-radius: 10px;
    border: 1px solid var(--line);
    box-shadow: 0 0 24px rgba(46,204,113,0.2);
}

.panel-text h1 {
    font-size: clamp(1.5rem, 4vh, 2.2rem);
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.panel-text h1 span { color: var(--green); }

.tagline {
    font-size: clamp(0.85rem, 2vh, 1.05rem);
    opacity: 0.85;
    margin-top: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
}

.feature-list {
    list-style: none;
    margin-top: clamp(16px, 3vh, 28px);
    display: flex;
    flex-direction: column;
    gap: clamp(6px, 1.4vh, 12px);
}

.feature-list li {
    font-size: clamp(0.85rem, 1.8vh, 1rem);
    display: flex;
    align-items: center;
    gap: 12px;
    opacity: 0.9;
}

.f-icon { font-size: 1.1em; }

.panel-image {
    flex: 0 1 auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

.panel-image img {
    height: min(72vh, 480px);
    width: auto;
    max-width: 46vw;
    object-fit: contain;
    filter: drop-shadow(0 0 40px rgba(46,204,113,0.15));
}

.footer-line {
    margin-top: clamp(16px, 3vh, 28px);
    font-size: 0.78rem;
    opacity: 0.5;
}

.footer-line a { color: var(--green); }

@media (max-width: 780px) {
    .page { flex-direction: column-reverse; gap: clamp(10px, 2vh, 20px); }
    .panel-image img { height: min(42vh, 320px); max-width: 80vw; }
    .panel-text { text-align: center; }
    .brand-row { justify-content: center; }
    .feature-list li { justify-content: center; }
}

/* ── Document pages (privacy, terms) ── */
.content {
    max-width: 760px;
    margin: 0 auto;
    padding: 60px 24px 80px;
}

.content h1 {
    font-size: clamp(1.6rem, 4vw, 2.2rem);
    font-weight: 700;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.content h1 span { color: var(--green); }

.effective-date {
    font-size: 0.9rem;
    opacity: 0.55;
    margin-bottom: 48px;
}

.content h2 {
    font-size: 1.05rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--green);
    margin: 40px 0 12px;
}

.content p {
    font-size: 0.95rem;
    line-height: 1.75;
    opacity: 0.8;
    margin-bottom: 16px;
}

.content ul {
    margin: 0 0 16px 20px;
}

.content ul li {
    font-size: 0.95rem;
    line-height: 1.75;
    opacity: 0.8;
    margin-bottom: 6px;
}

.content a {
    color: var(--green);
    text-decoration: underline;
}

/* ── 404 ── */
.error-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 24px;
}

.error-page h1 {
    font-size: 4rem;
    color: var(--green);
    letter-spacing: 0.1em;
}

.error-page p {
    opacity: 0.7;
    margin: 16px 0 32px;
}

/* ── Responsive ── */
@media (max-width: 600px) {
    .hero { padding: 60px 20px 60px; }
    .store-btn { padding: 14px 28px; }
}