/* RailGrid Technologies — site styles
   Brand: navy #012256 · cyan #01B2DE (sampled from the official logo) */

:root {
  --navy: #012256;
  --navy-700: #0b3170;
  --navy-900: #01173a;
  --cyan: #01b2de;
  --cyan-600: #0796bb;
  --cyan-100: #e2f6fc;
  --ink: #0f1a2e;
  --ink-2: #3a4a63;
  --ink-3: #6b7890;
  --line: #dfe5ee;
  --line-2: #eef2f7;
  --paper: #f6f8fb;
  --white: #ffffff;
  --green: #15803d;
  --green-bg: #e6f6ec;
  --amber: #b45309;
  --amber-bg: #fff4e5;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 12px 32px -12px rgba(1, 34, 86, 0.18);
  --shadow-lg: 0 32px 64px -24px rgba(1, 34, 86, 0.28);
  --font: "Manrope", system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --container: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--paper); line-height: 1.55; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: var(--cyan-600); text-decoration: none; }
a:hover { color: var(--navy); }
h1, h2, h3, h4 { margin: 0; font-weight: 700; letter-spacing: -0.02em; line-height: 1.12; color: var(--navy); text-wrap: pretty; }
h1 { font-size: clamp(38px, 5vw, 60px); letter-spacing: -0.03em; }
h2 { font-size: clamp(30px, 3.2vw, 40px); }
h3 { font-size: 20px; }
p { margin: 0; text-wrap: pretty; }
.lead { font-size: 19px; color: var(--ink-2); line-height: 1.6; }
.muted { color: var(--ink-3); }
.small { font-size: 13px; }
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 88px 0; }
.section--tight { padding: 56px 0; }
.section--dark { background: var(--navy); color: #eaf0f8; }
.section--dark h2, .section--dark h3 { color: #fff; }
.section--dark .lead, .section--dark .muted { color: #a9b8cf; }
.section--white { background: var(--white); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.eyebrow { display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--cyan-600); margin-bottom: 14px; }
.section--dark .eyebrow { color: var(--cyan); }
.section-head { display: grid; grid-template-columns: 7fr 5fr; gap: 40px; align-items: end; margin-bottom: 44px; }
.section-head p { font-size: 16px; color: var(--ink-2); }
.section--dark .section-head p { color: #a9b8cf; }

/* Header */
.header { position: sticky; top: 0; z-index: 50; background: rgba(246, 248, 251, 0.86); backdrop-filter: saturate(160%) blur(12px); -webkit-backdrop-filter: saturate(160%) blur(12px); border-bottom: 1px solid var(--line); }
.header__inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--navy); }
.brand img { height: 40px; width: auto; }
.brand__word { font-weight: 800; font-size: 18px; letter-spacing: 0.02em; line-height: 1; }
.brand__word span { color: var(--cyan); }
.brand__sub { display: block; font-size: 9px; font-weight: 600; letter-spacing: 0.32em; color: var(--navy); margin-top: 3px; }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a { padding: 8px 12px; border-radius: var(--radius-sm); font-size: 14px; font-weight: 600; color: var(--ink-2); }
.nav a:hover, .nav a[aria-current="page"] { color: var(--navy); background: rgba(1, 34, 86, 0.06); }
.header__cta { display: flex; align-items: center; gap: 8px; }
.nav-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fff; align-items: center; justify-content: center; cursor: pointer; }
.nav-toggle svg { width: 22px; height: 22px; stroke: var(--navy); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 46px; padding: 0 20px; border-radius: var(--radius-sm); font-size: 15px; font-weight: 700; border: 1px solid transparent; cursor: pointer; font-family: inherit; white-space: nowrap; transition: background .15s, color .15s, border-color .15s, transform .15s; }
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--cyan); color: var(--navy-900); }
.btn--primary:hover { background: #21c3ec; color: var(--navy-900); }
.btn--navy { background: var(--navy); color: #fff; }
.btn--navy:hover { background: var(--navy-700); color: #fff; }
.btn--ghost { background: transparent; border-color: var(--line); color: var(--navy); }
.btn--ghost:hover { border-color: var(--navy); color: var(--navy); }
.btn--ghost-light { background: transparent; border-color: rgba(255,255,255,0.28); color: #fff; }
.btn--ghost-light:hover { border-color: #fff; color: #fff; }
.btn--sm { height: 40px; padding: 0 14px; font-size: 14px; }
.btn--lg { height: 52px; padding: 0 26px; font-size: 16px; }

/* Hero */
.hero { padding: 88px 0 72px; background: linear-gradient(180deg, #fff 0%, var(--paper) 100%); border-bottom: 1px solid var(--line); }
.hero__grid { display: grid; grid-template-columns: 7fr 5fr; gap: 48px; align-items: center; }
.hero__copy { display: flex; flex-direction: column; gap: 24px; }
.badges { display: flex; flex-wrap: wrap; gap: 8px; }
.badge { display: inline-flex; align-items: center; gap: 7px; min-height: 30px; padding: 5px 12px; line-height: 1.2; border-radius: 999px; font-size: 12px; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; }
.badge--cyan { background: var(--cyan-100); color: var(--navy); }
.badge--line { border: 1px solid var(--line); color: var(--ink-3); }
.badge svg { width: 14px; height: 14px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; }
.proof { display: flex; flex-wrap: wrap; gap: 24px; font-size: 13px; color: var(--ink-3); padding-top: 8px; }
.proof span { display: inline-flex; align-items: center; gap: 8px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); display: inline-block; }
.page-hero { padding: 72px 0 56px; background: #fff; border-bottom: 1px solid var(--line); }
.page-hero .lead { max-width: 720px; margin-top: 18px; }
.page-hero--dark { background: var(--navy); color: #eaf0f8; border-bottom: 0; }
.page-hero--dark h1 { color: #fff; }
.page-hero--dark .lead { color: #b7c4d8; }

/* Product window mock */
.window, .phone { color: var(--ink); }
.window { border-radius: 12px; border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow-lg); overflow: hidden; }
.window__bar { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--line-2); background: #fbfcfd; font-size: 12px; color: var(--ink-3); }
.window__dots { display: flex; gap: 6px; }
.window__dots span { width: 10px; height: 10px; border-radius: 50%; background: var(--line); display: inline-block; }
.window__body { padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.stat { padding: 14px; border-radius: 8px; background: var(--paper); display: flex; flex-direction: column; gap: 4px; }
.stat__label { font-size: 11px; color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.06em; font-weight: 600; }
.stat__value { font-size: 24px; font-weight: 800; letter-spacing: -0.02em; color: var(--navy); }
.rows { display: flex; flex-direction: column; gap: 8px; }
.row { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 10px 12px; border: 1px solid var(--line-2); border-radius: 8px; font-size: 13px; }
.pill { font-size: 11px; font-weight: 700; padding: 3px 9px; border-radius: 999px; white-space: nowrap; }
.pill--amber { color: var(--amber); background: var(--amber-bg); }
.pill--green { color: var(--green); background: var(--green-bg); }
.pill--cyan { color: var(--navy); background: var(--cyan-100); }
.pill--dark { color: #fff; background: rgba(255,255,255,0.14); }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12px; }

/* Cards & grids */
.grid { display: grid; gap: 16px; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.card { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; display: flex; flex-direction: column; gap: 12px; }
.card h3 { font-size: 17px; }
.card p { font-size: 14px; color: var(--ink-2); }
.card .icon { width: 40px; height: 40px; border-radius: 9px; background: var(--cyan-100); display: flex; align-items: center; justify-content: center; }
.card .icon svg { width: 22px; height: 22px; stroke: var(--navy); fill: none; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; }
.card--dark { background: rgba(255,255,255,0.05); border-color: rgba(255,255,255,0.12); }
.card--dark h3 { color: #fff; }
.card--dark p { color: #b7c4d8; }
.card--link { transition: transform .15s, box-shadow .15s, border-color .15s; }
.card--link:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: #c9d3e0; }
.card__top { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.card__label { font-size: 12px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--cyan-600); }
.section--dark .card__label { color: var(--cyan); }
.card__more { font-size: 14px; font-weight: 700; color: var(--navy); margin-top: auto; }
.section--dark .card__more { color: var(--cyan); }
.num { font-size: 13px; font-weight: 700; color: var(--ink-3); }
.card--top { border-top: 2px solid var(--cyan); border-radius: 0 0 var(--radius) var(--radius); }

/* Feature list */
.list { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 10px; }
.list li { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; color: var(--ink-2); }
.list li::before { content: ""; flex: 0 0 auto; width: 18px; height: 18px; margin-top: 3px; border-radius: 50%; background: var(--cyan-100) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%23012256' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3.5 8.5l3 3 6-7'/%3E%3C/svg%3E") center / 11px no-repeat; }
.section--dark .list li { color: #cbd5e3; }

/* Chips */
.chips { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.chip { font-size: 13px; font-weight: 600; padding: 7px 12px; border-radius: 999px; border: 1px solid var(--line); background: #fff; color: var(--ink); }
.section--dark .chip { border-color: rgba(255,255,255,0.2); background: transparent; color: #eaf0f8; }

/* Doctrine */
.doctrine { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.doctrine div { padding: 28px; border-left: 2px solid var(--cyan); background: rgba(255,255,255,0.04); font-size: 18px; font-weight: 600; color: #fff; line-height: 1.4; }

/* Split */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split--wide { grid-template-columns: 7fr 5fr; }

/* Panel / callout */
.panel { padding: 48px; border-radius: 16px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
.cta-panel { padding: 56px; border-radius: 16px; background: var(--navy); color: #fff; display: grid; grid-template-columns: 8fr 4fr; gap: 32px; align-items: center; }
.cta-panel h2 { color: #fff; }
.cta-panel p { color: #b7c4d8; font-size: 17px; margin-top: 10px; max-width: 620px; }
.cta-panel .btn-wrap { display: flex; justify-content: flex-end; }

/* Forms */
.form { display: flex; flex-direction: column; gap: 16px; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 13px; font-weight: 700; color: var(--navy); }
.field label small { font-weight: 500; color: var(--ink-3); }
.field input, .field select, .field textarea { font: inherit; font-size: 15px; padding: 0 14px; height: 46px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fff; color: var(--ink); width: 100%; }
.field textarea { height: auto; min-height: 120px; padding: 12px 14px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--cyan); outline-offset: 1px; border-color: var(--cyan); }
.field .check, .check { font-weight: 500; color: var(--ink-2); font-size: 14px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--ink-2); }
.check input { width: 18px; height: 18px; margin-top: 2px; accent-color: var(--navy); }
.checks { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 16px; }
.form__legend { font-size: 12px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--cyan-600); margin-top: 8px; }
.form__note { font-size: 13px; color: var(--ink-3); }
.form__status { display: none; padding: 14px 16px; border-radius: var(--radius-sm); background: var(--green-bg); color: var(--green); font-weight: 600; font-size: 14px; }
.form__status.is-visible { display: block; }

/* Insights */
.post-card { display: flex; flex-direction: column; gap: 10px; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.post-card .meta { display: flex; gap: 12px; font-size: 12px; color: var(--ink-3); }
.post-card h3 { font-size: 18px; }
.post-card p { font-size: 14px; color: var(--ink-2); }
.article { max-width: 760px; margin: 0 auto; }
.article p { font-size: 17px; line-height: 1.75; color: var(--ink-2); margin-bottom: 22px; }
.article h2 { font-size: 26px; margin: 40px 0 14px; }
.article ol { padding-left: 20px; color: var(--ink-2); font-size: 14px; line-height: 1.6; }
.article ol li { margin-bottom: 8px; }
.article figure { margin: 32px 0; }
.article figcaption { font-size: 13px; color: var(--ink-3); margin-top: 8px; }
.article__hero { padding: 64px 0 40px; background: #fff; border-bottom: 1px solid var(--line); }

/* Footer */
.footer { background: var(--navy-900); color: #b7c4d8; padding: 56px 0 32px; }
.footer__grid { display: grid; grid-template-columns: 5fr 2fr 2fr 3fr; gap: 32px; font-size: 14px; }
.footer img { height: 120px; width: auto; margin-bottom: 16px; }
.footer h4 { color: #fff; font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 12px; }
.footer a { color: #b7c4d8; display: block; padding: 4px 0; }
.footer a:hover { color: #fff; }
.footer__legal { margin-top: 40px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.12); display: flex; justify-content: space-between; gap: 16px; font-size: 12px; color: #8393ad; flex-wrap: wrap; }

/* Timeline-ish layers */
.layers { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 8px; }
.layer { padding: 16px 14px; border-radius: 8px; background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.12); }
.layer b { display: block; font-size: 11px; color: var(--cyan); letter-spacing: 0.1em; margin-bottom: 6px; }
.layer span { font-size: 14px; font-weight: 600; color: #fff; }
.layer small { display: block; margin-top: 6px; font-size: 12px; color: #a9b8cf; }

/* Table */
.table { width: 100%; border-collapse: collapse; font-size: 14px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.table th, .table td { text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--line-2); vertical-align: top; }
.table th { font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); background: var(--paper); }
.table tr:last-child td { border-bottom: 0; }
.table-wrap { overflow-x: auto; }

/* Phone mock */
.phone { width: 300px; margin: 0 auto; border-radius: 32px; border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow-lg); padding: 18px; display: flex; flex-direction: column; gap: 12px; }
.phone__hdr { display: flex; justify-content: space-between; font-size: 11px; color: var(--ink-3); font-weight: 600; letter-spacing: 0.06em; }
.phone__hello { font-size: 16px; font-weight: 700; color: var(--navy); }
.phone__sub { font-size: 12px; color: var(--ink-3); }
.phone .stat { padding: 12px; }
.phone .stat__value { font-size: 18px; }
.phone__actions { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.phone__actions div { height: 44px; display: flex; align-items: center; justify-content: center; border-radius: 8px; font-size: 12px; font-weight: 700; background: var(--paper); color: var(--navy); }
.phone__actions div:first-child { background: var(--cyan); }

/* Utilities */
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; } .mt-40 { margin-top: 40px; } .mt-56 { margin-top: 56px; }
.center { text-align: center; }
.maxw { max-width: 720px; }
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } }

/* Responsive */
@media (max-width: 1024px) {
  .grid--5 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .layers { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  .section { padding: 64px 0; }
  .hero { padding: 56px 0 48px; }
  .hero__grid, .split, .split--wide, .section-head, .cta-panel { grid-template-columns: 1fr; }
  .cta-panel { padding: 36px 28px; }
  .cta-panel .btn-wrap { justify-content: flex-start; }
  .grid--3, .grid--5 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .doctrine { grid-template-columns: 1fr; }
  .panel { padding: 28px; }
  .nav { display: none; position: absolute; top: 72px; left: 0; right: 0; flex-direction: column; align-items: stretch; padding: 12px 16px 16px; background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow); }
  .nav.is-open { display: flex; }
  .nav a { padding: 12px; font-size: 16px; }
  .nav-toggle { display: inline-flex; }
  .header__cta .btn { display: none; }
  .brand__sub { display: none; }
}
@media (max-width: 560px) {
  .grid--2, .grid--3, .grid--4, .grid--5, .checks, .form__row { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .section-head { margin-bottom: 28px; }
  .hero__actions .btn { width: 100%; }
  .layers { grid-template-columns: 1fr 1fr; }
  .phone { width: 100%; max-width: 300px; }
}

/* Form error state (server-side failure) */
.form__status.is-error { background: #fdecec; color: #8a1c1c; }