/* Texas Aerial Group — single shared stylesheet.
   Tokens and rules per DESIGN.md. Mobile-first. */

:root {
  --ink: #1A2230;
  --ink-soft: #4A5568;
  --paper: #FAFAF7;
  --panel: #EFF1EC;
  --navy: #16324F;
  --navy-2: #1E4266;
  --navy-text: #E8EDF3;
  --navy-muted: #C7D2DE;
  --signal: #E8641B;
  --signal-deep: #C24F0E;
  --signal-soft: #F0A36B;
  --line: #D8DBD3;
  --ok: #2E6B4F;
  --font-head: "Barlow Semi Condensed", -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-body: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow-lift: 0 6px 24px rgb(22 50 79 / 0.10);
  --container: 1120px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.15;
  color: inherit;
}

h1 { font-size: clamp(2.1rem, 5vw, 3.05rem); }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.44rem); }
h3 { font-size: 1.25rem; }

p, li { max-width: 68ch; }

a { color: var(--signal-deep); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--signal); }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid rgb(232 100 27 / 0.45);
  outline-offset: 2px;
}

img, svg { max-width: 100%; height: auto; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */

.site-header {
  position: sticky; top: 0; z-index: 40;
  background: rgb(250 250 247 / 0.97);
  border-bottom: 1px solid var(--line);
}

.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 64px; gap: 16px;
}

.logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-head); font-weight: 700; font-size: 1.05rem;
  letter-spacing: 0.04em; color: var(--navy); text-decoration: none;
  white-space: nowrap;
}
.logo svg { flex: none; }

.nav-toggle {
  display: none; background: none; border: 0; cursor: pointer;
  padding: 10px; color: var(--navy);
}

.site-nav { display: flex; align-items: center; gap: 18px; }

.site-nav a {
  font-size: 0.95rem; font-weight: 500; color: var(--ink);
  text-decoration: none; padding: 8px 0; white-space: nowrap;
}
.site-nav a:hover { color: var(--signal-deep); }
.site-nav a[aria-current="page"] {
  border-bottom: 2px solid var(--signal);
}

.site-nav .btn { margin-left: 8px; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  font-family: var(--font-head); font-weight: 700; font-size: 1rem;
  letter-spacing: 0.02em;
  padding: 14px 28px; border-radius: var(--radius);
  border: 0; cursor: pointer; text-decoration: none; text-align: center;
  background: var(--signal); color: #fff;
  transition: background-color 0.15s ease;
}
.btn:hover { background: var(--signal-deep); color: #fff; }
/* Beat higher-specificity link colors (.site-nav a, .on-dark a) */
a.btn, .site-nav a.btn, .on-dark a.btn { color: #fff; }
a.btn.btn-secondary { color: inherit; }
.hero-ctas a.btn.btn-secondary { color: var(--navy); }
.on-dark a.btn.btn-secondary { color: var(--navy-text); }

.btn-secondary {
  background: transparent; color: inherit;
  border: 1.5px solid currentColor;
}
.btn-secondary:hover { background: rgb(22 50 79 / 0.06); color: inherit; }
.on-dark .btn-secondary:hover { background: rgb(255 255 255 / 0.1); }

.btn-small { padding: 10px 20px; font-size: 0.95rem; }

/* ---------- Sections ---------- */

section { padding: 96px 0; }

.eyebrow {
  display: block;
  font-family: var(--font-head); font-size: 0.8rem; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--signal-deep); margin-bottom: 12px;
}

.on-dark { background: var(--navy); color: var(--navy-text); }
.on-dark .eyebrow { color: var(--signal-soft); }
.on-dark h2, .on-dark h3 { color: #fff; }
.on-dark a { color: var(--signal-soft); }
.on-panel { background: var(--panel); }

section > .container > h2 { margin-bottom: 16px; }
.section-intro { color: var(--ink-soft); margin-bottom: 48px; }
.on-dark .section-intro { color: var(--navy-muted); }

/* ---------- Hero ---------- */

.hero {
  padding: 96px 0;
  background-color: var(--paper);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='600' height='600' viewBox='0 0 600 600'%3E%3Cg fill='none' stroke='%2316324F' stroke-opacity='0.05' stroke-width='1.5'%3E%3Cpath d='M60 500c80-120 40-200 140-260s60-140 180-160'/%3E%3Cpath d='M20 540c100-140 60-230 170-300S250 90 390 60'/%3E%3Cpath d='M100 460c60-100 20-170 110-220s70-120 170-140'/%3E%3Ccircle cx='470' cy='420' r='90'/%3E%3Ccircle cx='470' cy='420' r='140'/%3E%3Ccircle cx='470' cy='420' r='190'/%3E%3C/g%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right -80px top -60px;
}

.hero .container { max-width: 820px; margin-left: auto; margin-right: auto; text-align: left; }
.hero h1 { margin-bottom: 20px; color: var(--navy); }
.hero .lede { font-size: 1.2rem; color: var(--ink-soft); margin-bottom: 32px; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
.hero-ctas .btn-secondary { color: var(--navy); }

/* ---------- Trust strip ---------- */

.trust-strip { padding: 24px 0; }
.trust-strip ul {
  list-style: none;
  display: flex; flex-wrap: wrap; gap: 8px 40px;
  justify-content: center;
}
.trust-strip li {
  font-family: var(--font-head); font-weight: 600; font-size: 0.95rem;
  letter-spacing: 0.03em; display: flex; align-items: center; gap: 10px;
}
.trust-strip svg { color: var(--signal-soft); flex: none; }

/* ---------- Cards ---------- */

.card-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px;
}
.card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
  display: flex; flex-direction: column; gap: 12px;
}
.on-panel .card { background: var(--paper); }
section:not(.on-panel):not(.on-dark) .card { background: var(--panel); border-color: var(--line); }
.card:hover { box-shadow: var(--shadow-lift); border-color: var(--navy); }
.card svg { color: var(--navy); }
.card h3 { color: var(--navy); }
.card p { color: var(--ink-soft); font-size: 0.98rem; }
.card .card-link {
  margin-top: auto; font-weight: 600; font-size: 0.95rem;
  text-decoration: none;
}
.card .card-link::after { content: " \2192"; }

/* ---------- Steps ---------- */

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; counter-reset: step; }
.step { counter-increment: step; }
.step::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  font-family: var(--font-head); font-weight: 700; font-size: 2.44rem;
  color: var(--signal); line-height: 1; margin-bottom: 12px;
}
.step h3 { margin-bottom: 8px; color: var(--navy); }
.step p { color: var(--ink-soft); font-size: 0.98rem; }

/* ---------- Two-column feature rows ---------- */

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split figure {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: 48px;
  display: flex; align-items: center; justify-content: center;
}
.split h2 { margin-bottom: 16px; }
.split ul { padding-left: 20px; color: var(--ink-soft); display: grid; gap: 10px; }

/* ---------- Checklist ---------- */

.checklist { list-style: none; display: grid; gap: 14px; }
.checklist li { display: flex; gap: 12px; align-items: flex-start; color: var(--ink-soft); }
.checklist li strong { color: var(--ink); }
.on-dark .checklist li { color: var(--navy-muted); }
.on-dark .checklist li strong { color: #fff; }
.checklist svg { flex: none; margin-top: 5px; color: var(--signal-deep); }
.on-dark .checklist svg { color: var(--signal-soft); }

/* ---------- FAQ ---------- */

.faq { display: grid; gap: 16px; max-width: 820px; }
.faq details {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: 0;
}
.faq summary {
  cursor: pointer; padding: 20px 24px;
  font-family: var(--font-head); font-weight: 600; font-size: 1.1rem;
  color: var(--navy); list-style: none; position: relative; padding-right: 56px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 24px; top: 50%;
  transform: translateY(-50%);
  font-size: 1.4rem; color: var(--signal-deep); font-weight: 600;
}
.faq details[open] summary::after { content: "\2212"; }
.faq details p { padding: 0 24px 20px; color: var(--ink-soft); }

/* ---------- Pricing table ---------- */

.price-table-wrap { overflow-x: auto; }
.price-table { width: 100%; border-collapse: collapse; min-width: 560px; }
.price-table th, .price-table td {
  text-align: left; padding: 16px; border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.price-table th {
  font-family: var(--font-head); font-weight: 700; letter-spacing: 0.03em;
  color: var(--navy); font-size: 0.95rem; text-transform: uppercase;
}
.price-table td:nth-child(2) {
  font-family: var(--font-head); font-weight: 700; color: var(--navy);
  white-space: nowrap;
}
.price-table td:last-child { color: var(--ink-soft); font-size: 0.98rem; }

/* ---------- CTA band ---------- */

.cta-band { text-align: center; }
.cta-band h2 { margin-bottom: 12px; }
.cta-band p { margin: 0 auto 32px; color: var(--navy-muted); }
.cta-band .btn { font-size: 1.1rem; }

/* ---------- Forms ---------- */

.form-grid { display: grid; gap: 20px; max-width: 560px; }
.form-field label {
  display: block; font-weight: 600; font-size: 0.9rem; margin-bottom: 6px;
}
.form-field input, .form-field select, .form-field textarea {
  width: 100%; padding: 12px 14px;
  border: 1.5px solid var(--line); border-radius: var(--radius);
  background: #fff; font: inherit; color: var(--ink);
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  border-color: var(--navy);
}
.form-note { font-size: 0.9rem; color: var(--ink-soft); }

.contact-layout { display: grid; grid-template-columns: 1.4fr 1fr; gap: 64px; align-items: start; }
.contact-aside {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: 32px;
  display: grid; gap: 16px;
}
.contact-aside h3 { color: var(--navy); }
.contact-aside p { color: var(--ink-soft); font-size: 0.98rem; }

/* ---------- Footer ---------- */

.site-footer {
  background: var(--navy); color: var(--navy-muted);
  padding: 64px 0 32px; font-size: 0.95rem;
}
.footer-cols {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 48px;
  margin-bottom: 48px;
}
.site-footer h4 {
  color: #fff; font-size: 1rem; letter-spacing: 0.04em;
  text-transform: uppercase; margin-bottom: 16px;
}
.site-footer ul { list-style: none; display: grid; gap: 10px; }
.site-footer a { color: var(--navy-muted); text-decoration: none; }
.site-footer a:hover { color: #fff; }
.footer-brand p { max-width: 36ch; }
.footer-legal {
  border-top: 1px solid rgb(255 255 255 / 0.15);
  padding-top: 24px; font-size: 0.85rem;
  display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between;
}

/* ---------- Chatbot ---------- */

.chat-launcher {
  position: fixed; bottom: 16px; right: 16px; z-index: 60;
  width: 60px; height: 60px; border-radius: 50%;
  background: var(--signal); color: #fff; border: 0; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 16px rgb(22 50 79 / 0.3);
  transition: background-color 0.15s ease, transform 0.15s ease;
}
.chat-launcher:hover { background: var(--signal-deep); transform: scale(1.05); }

.chat-panel {
  position: fixed; bottom: 88px; right: 16px; z-index: 60;
  width: 380px; max-width: calc(100vw - 32px);
  height: min(560px, 85vh);
  background: var(--paper);
  border: 1px solid var(--line); border-radius: 16px;
  box-shadow: 0 12px 48px rgb(22 50 79 / 0.25);
  display: flex; flex-direction: column; overflow: hidden;
}
.chat-panel[hidden] { display: none; }

.chat-head {
  background: var(--navy); color: #fff;
  padding: 14px 18px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.chat-head strong { font-family: var(--font-head); letter-spacing: 0.03em; }
.chat-head small { display: block; color: var(--navy-muted); font-size: 0.8rem; }
.chat-close {
  background: none; border: 0; color: #fff; cursor: pointer;
  font-size: 1.3rem; line-height: 1; padding: 8px;
}

.chat-log {
  flex: 1; overflow-y: auto; padding: 18px;
  display: flex; flex-direction: column; gap: 10px;
}
.chat-msg {
  max-width: 85%; padding: 10px 14px; border-radius: 14px;
  font-size: 0.95rem; line-height: 1.5;
}
.chat-msg.bot { background: var(--panel); color: var(--ink); border-bottom-left-radius: 4px; align-self: flex-start; }
.chat-msg.user { background: var(--navy-2); color: #fff; border-bottom-right-radius: 4px; align-self: flex-end; }

.chat-chips { display: flex; flex-wrap: wrap; gap: 8px; align-self: flex-start; }
.chat-chip {
  background: transparent; border: 1.5px solid var(--navy);
  color: var(--navy); border-radius: 999px; padding: 8px 16px;
  font: inherit; font-size: 0.9rem; font-weight: 600; cursor: pointer;
  min-height: 38px;
}
.chat-chip:hover { background: var(--navy); color: #fff; }

.chat-input-row {
  display: flex; gap: 8px; padding: 12px;
  border-top: 1px solid var(--line); background: #fff;
}
.chat-input-row input {
  flex: 1; padding: 12px 14px; border: 1.5px solid var(--line);
  border-radius: var(--radius); font: inherit;
}
.chat-input-row input:focus { border-color: var(--navy); }
.chat-send {
  background: var(--signal); color: #fff; border: 0; border-radius: var(--radius);
  padding: 0 18px; font-family: var(--font-head); font-weight: 700;
  cursor: pointer; min-height: 44px;
}
.chat-send:hover { background: var(--signal-deep); }
.chat-send:disabled { opacity: 0.5; cursor: default; }

/* ---------- 404 ---------- */

.error-page { min-height: 55vh; display: flex; align-items: center; }
.error-page .container { text-align: center; }
.error-page h1 { color: var(--navy); margin-bottom: 16px; }
.error-page p { margin: 0 auto 32px; color: var(--ink-soft); }
.error-page .hero-ctas { justify-content: center; }

/* ---------- Utility ---------- */

.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.center { text-align: center; }
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--navy); color: #fff; padding: 12px 20px;
}
.skip-link:focus { left: 0; }

/* ---------- Responsive ---------- */

@media (max-width: 1140px) {
  .nav-toggle { display: block; }
  .site-nav {
    display: none;
    position: absolute; top: 64px; left: 0; right: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 8px 24px 24px;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 14px 0; font-size: 1.05rem; border-bottom: 1px solid var(--line); }
  .site-nav a[aria-current="page"] { border-bottom: 1px solid var(--line); color: var(--signal-deep); }
  .site-nav .btn { margin: 16px 0 0; }
}

@media (max-width: 900px) {
  section { padding: 64px 0; }
  .hero { padding: 64px 0; }
  .split { grid-template-columns: 1fr; gap: 32px; }
  .split figure { order: -1; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .contact-layout { grid-template-columns: 1fr; gap: 48px; }
  .steps { grid-template-columns: 1fr; gap: 32px; }
  .card-grid.cols-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  .card-grid, .card-grid.cols-3 { grid-template-columns: 1fr; }
  .trust-strip ul { justify-content: flex-start; gap: 8px 24px; }
  .footer-cols { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  body { font-size: 1rem; }
  .chat-panel {
    bottom: 0; right: 0; width: 100vw; max-width: 100vw;
    height: 100dvh; border-radius: 0; border: 0;
  }
  .btn { width: 100%; }
  .hero-ctas .btn { width: 100%; }
  .site-nav .btn { width: auto; }
}