:root {
    --teal: #0d9488;
    --teal-dark: #0f766e;
    --ink: #0f172a;
    --accent: #f59e0b;
    --bg: #f7faf9;
    --surface: #ffffff;
    --border: #e2e8e6;
    --text: #16211f;
    --text-muted: #5b6b67;
    --danger: #a4342a;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}
a { color: inherit; }
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

header {
    background: var(--ink);
    color: #fff;
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 16px 0; }
.brand { font-size: 21px; font-weight: 800; letter-spacing: .3px; }
.brand span { color: var(--teal); }
nav.main-nav { display: flex; align-items: center; gap: 26px; }
nav.main-nav a { text-decoration: none; color: #cbd5d1; font-size: 14px; font-weight: 500; }
nav.main-nav a:hover { color: #fff; }
.btn-signup {
    background: var(--teal); color: #fff;
    padding: 10px 22px; border-radius: 6px; font-weight: 700; font-size: 14px;
    text-decoration: none; display: inline-flex; align-items: center; gap: 8px;
    border: none; cursor: pointer;
}
.btn-signup:hover { background: var(--teal-dark); }

.hero {
    background: linear-gradient(160deg, var(--ink) 0%, #12302c 100%);
    color: #fff; padding: 90px 0 100px; text-align: center;
}
.hero .kicker {
    display: inline-block; background: rgba(13,148,136,.18); color: #5eead4;
    padding: 6px 16px; border-radius: 20px; font-size: 12px; font-weight: 700;
    letter-spacing: .5px; margin-bottom: 22px;
}
.hero h1 { font-size: 42px; margin-bottom: 18px; line-height: 1.2; }
.hero h1 span { color: var(--teal); }
.hero p { font-size: 17px; color: #c9d6d3; max-width: 620px; margin: 0 auto 34px; }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn-outline { border: 1px solid rgba(255,255,255,.35); color: #fff; padding: 12px 24px; border-radius: 6px; text-decoration: none; font-size: 14px; font-weight: 600; }
.btn-outline:hover { background: rgba(255,255,255,.08); }
.btn-signup.large { padding: 13px 28px; font-size: 15px; }

section { padding: 68px 0; }
.section-label { font-size: 12px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--teal-dark); font-weight: 700; margin-bottom: 8px; }
.section-title { font-size: 28px; margin-bottom: 18px; }
.section-intro { color: var(--text-muted); max-width: 640px; margin-bottom: 40px; }
.centered { text-align: center; margin-left: auto; margin-right: auto; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center; }

.card {
    background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 28px;
}
.card .icon-badge {
    width: 44px; height: 44px; border-radius: 8px;
    background: #e6f6f4; display: flex; align-items: center; justify-content: center; margin-bottom: 18px;
}
.card h3 { font-size: 17px; margin-bottom: 8px; }
.card p { font-size: 14px; color: var(--text-muted); }

.problem-band {
    background: #fff7ec; border: 1px solid #f4e2c0; border-radius: 10px;
    padding: 30px 32px; display: flex; gap: 20px; align-items: flex-start;
}
.problem-band .icon { stroke: var(--danger); }
.problem-band .icon-badge { background: #fbe6e2; }
.problem-band h3 { font-size: 17px; margin-bottom: 8px; }
.problem-band p { font-size: 14.5px; color: var(--text-muted); }

.steps { counter-reset: step; }
.step { display: flex; gap: 18px; margin-bottom: 28px; align-items: flex-start; }
.step .num {
    counter-increment: step; content: counter(step);
    width: 36px; height: 36px; border-radius: 50%; background: var(--teal); color: #fff;
    display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 15px; flex-shrink: 0;
}
.step h3 { font-size: 16px; margin-bottom: 4px; }
.step p { font-size: 13.5px; color: var(--text-muted); }

.demo-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: 10px; overflow: hidden;
    text-decoration: none; color: var(--text); display: block; transition: box-shadow .15s, transform .15s;
}
.demo-card:hover { box-shadow: 0 8px 24px rgba(15,23,42,.08); transform: translateY(-2px); }
.demo-card .demo-band { height: 8px; }
.demo-card .demo-body { padding: 24px; }
.demo-card h3 { font-size: 16px; margin-bottom: 6px; }
.demo-card p { font-size: 13.5px; color: var(--text-muted); margin-bottom: 14px; }
.demo-card .visit { font-size: 13px; font-weight: 700; color: var(--teal-dark); display: flex; align-items: center; gap: 6px; }
.demo-card .icon.visit-icon { width: 14px; height: 14px; stroke: var(--teal-dark); }

.cta-band {
    background: var(--ink); color: #fff; border-radius: 14px; padding: 54px 40px; text-align: center;
}
.cta-band h2 { font-size: 26px; margin-bottom: 12px; }
.cta-band p { color: #c9d6d3; margin-bottom: 26px; }

.icon { width: 22px; height: 22px; stroke: var(--teal-dark); fill: none; stroke-width: 1.7; }
.icon-sm { width: 16px; height: 16px; }

footer { background: var(--ink); color: #9fb0ac; padding: 40px 0 26px; font-size: 13px; }
footer .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 20px; }
footer a { text-decoration: none; color: #9fb0ac; }
.foot-bottom { border-top: 1px solid #1f3934; margin-top: 26px; padding-top: 18px; text-align: center; font-size: 12px; }

/* SIGN UP PAGE */
.form-wrap { max-width: 480px; margin: 60px auto; padding: 0 20px; }
.form-card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 32px; }
.form-group { margin-bottom: 16px; }
label { display: block; font-size: 13px; font-weight: 700; margin-bottom: 6px; }
input, select {
    width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 6px;
    font-size: 14px; font-family: inherit; background: #fff; color: var(--text);
}
input:focus, select:focus { outline: none; border-color: var(--teal); }
.btn-submit {
    width: 100%; background: var(--teal); color: #fff; border: none; padding: 13px;
    border-radius: 6px; font-size: 15px; font-weight: 700; cursor: pointer;
}
.btn-submit:hover { background: var(--teal-dark); }
.alert-box { padding: 12px 14px; border-radius: 6px; font-size: 13px; margin-top: 16px; display: none; }
.alert-box.show { display: block; }
.alert-success { background: #e6f6f4; color: var(--teal-dark); border: 1px solid #bfe8e2; }
.alert-error { background: #fbeceb; color: var(--danger); border: 1px solid #f0cdc9; }
.page-hero { background: var(--ink); color: #fff; padding: 50px 0; text-align: center; }
.page-hero h1 { font-size: 27px; }
.page-hero p { color: #c9d6d3; font-size: 14px; margin-top: 6px; }

@media (max-width: 768px) {
    .grid-3, .grid-2 { grid-template-columns: 1fr; }
    nav.main-nav { display: none; }
    footer .container { flex-direction: column; }
}