:root {
    --teal: #2ec5dd;
    --teal-dark: #17b3cc;
    --navy: #173e6e;
    --navy-dark: #0f2a4f;
    --accent-orange: #ef5a24;
    --ink: #0c1a2b;
    --gray-900: #1a2634;
    --gray-700: #4b5a6b;
    --gray-500: #7b8a9a;
    --gray-300: #cdd6e0;
    --gray-200: #e6ecf2;
    --gray-100: #f1f5f9;
    --gray-50: #f8fafc;
    --white: #ffffff;
    --radius: 10px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 2px rgba(15,42,79,0.06), 0 1px 3px rgba(15,42,79,0.08);
    --shadow-md: 0 4px 16px rgba(15,42,79,0.10), 0 2px 6px rgba(15,42,79,0.06);
    --shadow-lg: 0 20px 40px rgba(15,42,79,0.15);
    --container: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    color: var(--gray-900);
    background: var(--white);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--teal-dark); text-decoration: none; }
a:hover { color: var(--navy); }
h1, h2, h3, h4 { margin: 0 0 0.5em; line-height: 1.2; color: var(--ink); letter-spacing: -0.01em; }
h1 { font-size: clamp(2.25rem, 5vw, 3.75rem); font-weight: 800; letter-spacing: -0.025em; }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); font-weight: 700; letter-spacing: -0.015em; }
h3 { font-size: 1.2rem; font-weight: 700; }
p { margin: 0 0 1em; }

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.eyebrow {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--teal-dark);
    margin-bottom: 0.75rem;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,0.92);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid var(--gray-200);
}
.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 1rem;
    padding-bottom: 1rem;
}
.site-header .logo img { height: 42px; width: auto; }
.nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}
.nav a {
    color: var(--gray-700);
    font-weight: 500;
    font-size: 0.95rem;
}
.nav a:hover { color: var(--navy); }
.nav .cta {
    background: var(--navy);
    color: var(--white);
    padding: 0.6rem 1.1rem;
    border-radius: var(--radius);
    font-weight: 600;
}
.nav .cta:hover { background: var(--navy-dark); color: var(--white); }

/* Hero */
.hero {
    position: relative;
    padding: 6rem 0 7rem;
    background:
        radial-gradient(1200px 500px at 10% -10%, rgba(46,197,221,0.18), transparent 60%),
        radial-gradient(900px 500px at 90% 110%, rgba(23,62,110,0.12), transparent 60%),
        linear-gradient(180deg, #ffffff 0%, #f1f9fc 100%);
    overflow: hidden;
}
.hero .container {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 3rem;
    align-items: center;
    position: relative;
}
.hero h1 { margin-bottom: 1.25rem; color: var(--ink); }
.hero h1 .accent { color: var(--teal-dark); }
.hero p.lead {
    font-size: 1.2rem;
    color: var(--gray-700);
    max-width: 580px;
    margin-bottom: 2rem;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; }
.btn {
    display: inline-block;
    padding: 0.9rem 1.6rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    transition: transform 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
    cursor: pointer;
    border: none;
}
.btn-primary { background: var(--navy); color: var(--white); box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--navy-dark); color: var(--white); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-secondary {
    background: var(--teal);
    color: var(--white);
}
.btn-secondary:hover { background: var(--teal-dark); color: var(--white); }
.btn-ghost {
    background: transparent;
    color: var(--navy);
    border: 1.5px solid var(--gray-300);
}
.btn-ghost:hover { border-color: var(--navy); color: var(--navy); }

.hero-visual { justify-self: end; position: relative; }
.hero-visual::before {
    content: "";
    position: absolute;
    top: -10%;
    right: -10%;
    width: 80%;
    height: 120%;
    background: linear-gradient(135deg, rgba(46,197,221,0.2), rgba(23,62,110,0.1));
    border-radius: 50%;
    filter: blur(40px);
    z-index: 0;
}
.hero-visual img {
    position: relative;
    z-index: 1;
    max-width: 500px;
    filter: drop-shadow(0 24px 48px rgba(15,42,79,0.25));
}

/* Stat bar */
.stat-bar {
    background: var(--navy);
    color: var(--white);
    padding: 2rem 0;
}
.stat-bar .container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
}
.stat-bar .stat strong {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--teal);
    letter-spacing: -0.02em;
}
.stat-bar .stat span {
    color: rgba(255,255,255,0.75);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* Sections */
section {
    padding: 5rem 0;
}
section.alt { background: var(--gray-50); }
.section-head {
    text-align: center;
    max-width: 740px;
    margin: 0 auto 3rem;
}
.section-head p {
    color: var(--gray-700);
    font-size: 1.1rem;
}

/* What is */
.what-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 4rem;
    align-items: center;
}
.what-grid p {
    color: var(--gray-700);
    font-size: 1.05rem;
}

/* Benefits (4 cards) */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}
.benefit {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.benefit:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--teal);
}
.benefit .icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, var(--teal) 0%, var(--navy) 100%);
    color: var(--white);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    margin-bottom: 1.25rem;
}
.benefit .icon svg { width: 26px; height: 26px; }
.benefit h3 { color: var(--navy); margin-bottom: 0.5rem; }
.benefit p { color: var(--gray-700); font-size: 0.98rem; margin: 0; }

/* Features (8 grid) */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
}
.feature {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    transition: transform 0.15s ease, border-color 0.15s ease;
}
.feature:hover { transform: translateY(-2px); border-color: var(--teal); }
.feature .icon {
    width: 48px;
    height: 48px;
    background: var(--gray-100);
    color: var(--teal-dark);
    border-radius: var(--radius);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}
.feature .icon svg { width: 24px; height: 24px; }
.feature h3 { font-size: 0.98rem; color: var(--navy); margin: 0; }

/* How it works */
.how-it-works {
    background: linear-gradient(135deg, var(--navy) 0%, var(--navy-dark) 100%);
    color: var(--white);
    padding: 5rem 0;
}
.how-it-works h2 { color: var(--white); }
.how-it-works .section-head p { color: rgba(255,255,255,0.8); }
.devices-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
}
.device-card {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.12);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    text-align: center;
}
.device-card .badge {
    display: inline-block;
    background: var(--teal);
    color: var(--ink);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
    margin-bottom: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}
.device-card h3 { color: var(--white); margin-bottom: 0.5rem; font-size: 1.1rem; }
.device-card p { color: rgba(255,255,255,0.75); font-size: 0.92rem; margin: 0; }

/* Coming soon */
.coming-soon {
    padding: 4rem 0;
    background: var(--gray-50);
}
.coming-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}
.coming-item {
    background: var(--white);
    border: 1px dashed var(--teal);
    padding: 1.75rem;
    border-radius: var(--radius-lg);
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}
.coming-item .icon {
    width: 48px; height: 48px;
    background: var(--teal);
    border-radius: var(--radius);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    flex-shrink: 0;
}
.coming-item .icon svg { width: 24px; height: 24px; }
.coming-item h3 { color: var(--navy); margin: 0 0 0.25rem; font-size: 1.1rem; }
.coming-item p { color: var(--gray-700); margin: 0; font-size: 0.95rem; }

/* CTA band */
.cta-band {
    background:
        radial-gradient(600px 300px at 20% 30%, rgba(46,197,221,0.25), transparent 60%),
        linear-gradient(135deg, var(--navy) 0%, var(--navy-dark) 100%);
    color: var(--white);
    padding: 4rem 0;
    text-align: center;
}
.cta-band h2 { color: var(--white); }
.cta-band p { color: rgba(255,255,255,0.85); max-width: 600px; margin: 0 auto 2rem; }

/* Footer */
footer.footer {
    background: var(--ink);
    color: rgba(255,255,255,0.65);
    padding: 3rem 0 2rem;
    font-size: 0.92rem;
}
footer.footer .container {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 2rem;
    align-items: start;
}
footer.footer h4 { color: var(--white); margin-bottom: 0.75rem; font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.08em; }
footer.footer ul { list-style: none; padding: 0; margin: 0; }
footer.footer li { padding: 0.25rem 0; }
footer.footer a { color: rgba(255,255,255,0.75); }
footer.footer a:hover { color: var(--white); }
footer .by-robomo img { height: 40px; width: auto; background: var(--accent-orange); padding: 0.5rem 0.75rem; border-radius: var(--radius); }
footer .legal {
    border-top: 1px solid rgba(255,255,255,0.08);
    margin-top: 2rem;
    padding-top: 1.5rem;
    text-align: center;
    color: rgba(255,255,255,0.5);
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 900px) {
    .hero { padding: 4rem 0 5rem; }
    .hero .container { grid-template-columns: 1fr; }
    .hero-visual { justify-self: start; }
    .hero-visual img { max-width: 360px; }
    .what-grid { grid-template-columns: 1fr; gap: 2rem; }
    .benefits-grid { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .devices-row { grid-template-columns: 1fr; }
    .stat-bar .container { grid-template-columns: repeat(2, 1fr); }
    .coming-list { grid-template-columns: 1fr; }
    footer.footer .container { grid-template-columns: 1fr; }
    .nav { gap: 1rem; }
    .nav a:not(.cta) { display: none; }
}

/* ---------- Landing page patterns ---------- */
.lp-hero {
    position: relative;
    padding: 5rem 0 4rem;
    background:
        radial-gradient(800px 400px at 80% -20%, rgba(46,197,221,0.18), transparent 60%),
        radial-gradient(600px 400px at 10% 110%, rgba(23,62,110,0.14), transparent 60%),
        linear-gradient(180deg, #ffffff 0%, #f1f9fc 100%);
    overflow: hidden;
}
.lp-hero .container { position: relative; z-index: 1; }
.lp-hero h1 { max-width: 780px; }
.lp-hero h1 .accent { color: var(--teal-dark); }
.lp-hero p.lead { color: var(--gray-700); max-width: 620px; font-size: 1.15rem; margin-bottom: 1.75rem; }

.breadcrumb {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-bottom: 1.25rem;
}
.breadcrumb a { color: var(--teal-dark); }
.breadcrumb span { opacity: 0.5; margin: 0 0.35rem; }

.lp-body section { padding: 4rem 0; }
.lp-body section.alt { background: var(--gray-50); }
.lp-body h2 { margin-top: 0; margin-bottom: 1rem; }
.lp-body p { color: var(--gray-700); }
.lp-body ul { padding-left: 1.25rem; color: var(--gray-700); }
.lp-body ul li { margin-bottom: 0.45rem; }

.lp-two-col {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 3rem;
    align-items: start;
}
.lp-two-col.reverse { grid-template-columns: 1fr 1.2fr; }

.lp-feature-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    margin-top: 1.5rem;
}
.lp-feature-list .benefit { padding: 1.5rem; }

.spec-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
    margin: 1.25rem 0 2rem;
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}
.spec-table th, .spec-table td {
    text-align: left;
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--gray-200);
}
.spec-table th {
    background: var(--gray-100);
    color: var(--navy);
    font-weight: 600;
    width: 38%;
}
.spec-table tr:last-child td, .spec-table tr:last-child th { border-bottom: none; }

.lp-faq { max-width: 860px; margin: 0 auto; }
.lp-faq details {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    margin-bottom: 0.75rem;
    transition: border-color 0.15s ease;
}
.lp-faq details[open] { border-color: var(--teal); }
.lp-faq summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--navy);
    list-style: none;
    padding-right: 1.5rem;
    position: relative;
}
.lp-faq summary::-webkit-details-marker { display: none; }
.lp-faq summary::after {
    content: "+";
    position: absolute;
    right: 0;
    top: 0;
    color: var(--teal-dark);
    font-size: 1.5rem;
    line-height: 1;
}
.lp-faq details[open] summary::after { content: "−"; }
.lp-faq details p { margin-top: 0.75rem; color: var(--gray-700); }

.lp-cta-band {
    padding: 3.5rem 0;
    background:
        radial-gradient(600px 300px at 20% 30%, rgba(46,197,221,0.25), transparent 60%),
        linear-gradient(135deg, var(--navy) 0%, var(--navy-dark) 100%);
    color: var(--white);
    text-align: center;
}
.lp-cta-band h2 { color: var(--white); }
.lp-cta-band p { color: rgba(255,255,255,0.9); max-width: 600px; margin: 0 auto 1.75rem; }

.related-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 2rem;
}
.related-links a {
    display: block;
    background: var(--white);
    border: 1px solid var(--gray-200);
    padding: 1.25rem 1.5rem;
    border-radius: var(--radius);
    color: var(--navy);
    font-weight: 600;
    transition: all 0.15s ease;
}
.related-links a:hover {
    border-color: var(--teal);
    transform: translateY(-2px);
}
.related-links a small {
    display: block;
    font-weight: 400;
    color: var(--gray-500);
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

.pill-row {
    display: flex; flex-wrap: wrap; gap: 0.5rem;
    margin: 1rem 0 1.5rem;
}
.pill {
    background: var(--gray-100);
    color: var(--navy);
    padding: 0.4rem 0.85rem;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 500;
}

@media (max-width: 900px) {
    .lp-two-col, .lp-two-col.reverse { grid-template-columns: 1fr; }
    .lp-feature-list { grid-template-columns: 1fr; }
    .related-links { grid-template-columns: 1fr; }
}

/* Contact form */
.contact-form {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: grid;
    gap: 0.9rem;
    max-width: 640px;
    margin: 0 auto;
    text-align: left;
}
.contact-form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem; }
.contact-form label { font-size: 0.8rem; font-weight: 600; color: var(--navy); letter-spacing: 0.04em; text-transform: uppercase; display: block; margin-bottom: 0.35rem; }
.contact-form input, .contact-form textarea, .contact-form select {
    width: 100%;
    padding: 0.75rem 0.9rem;
    border: 1.5px solid var(--gray-200);
    background: var(--white);
    color: var(--ink);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.contact-form input:focus, .contact-form textarea:focus, .contact-form select:focus {
    outline: none;
    border-color: var(--teal);
    box-shadow: 0 0 0 3px rgba(46,197,221,0.18);
}
.contact-form textarea { min-height: 140px; resize: vertical; }
.contact-form .honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.contact-form button[type="submit"] {
    background: var(--navy);
    color: var(--white);
    padding: 0.95rem 1.5rem;
    border: none;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.15s ease;
    margin-top: 0.5rem;
}
.contact-form button[type="submit"]:hover { background: var(--navy-dark); transform: translateY(-1px); }
.contact-form button[type="submit"]:disabled { opacity: 0.6; cursor: wait; }
.form-error { color: #c2410c; font-size: 0.85rem; margin-top: -0.2rem; }
.form-feedback {
    padding: 0.85rem 1rem;
    border-radius: var(--radius);
    font-size: 0.95rem;
    display: none;
}
.form-feedback.visible { display: block; }
.form-feedback.success { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.form-feedback.error { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
@media (max-width: 700px) { .contact-form .row { grid-template-columns: 1fr; } }