/* ==========================================================================
   River Tech LLC — rivertech.llc
   Sibling stylesheet to rivertechschool.com
   Same bones, same type, blue instead of red.
   ========================================================================== */

:root {
  /* Shared with school */
  --color-bg: #f6f4f0;
  --color-text: #272443;
  --color-white: #ffffff;
  --color-black: #000000;

  /* Blue accent system (replaces red) */
  --color-blue-light: #5AAFE8;
  --color-blue: #1F7FD1;
  --color-blue-deep: #15568F;
  --color-blue-darker: #104472;

  /* Role tokens that mirror the school's pattern */
  --color-accent: var(--color-blue);
  --color-accent-btn: var(--color-blue-deep);
  --color-link: var(--color-blue);
  --color-tint: #dfeaf5;  /* pale blue — parallels the school's #f0dddd pink */

  /* Accent gradient — used on filled buttons, active nav, and display marks */
  --gradient-accent: linear-gradient(135deg, var(--color-blue-light) 0%, var(--color-blue) 55%, var(--color-blue-deep) 100%);

  /* Typography — same as school */
  --font-body: "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --font-display: "Avenir Next", "Avenir", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-nav: "Adobe Caslon Pro", "Palatino Linotype", Palatino, Georgia, serif;

  /* Layout tokens */
  --sidebar-w: 240px;
  --content-max: 800px;
}

/* ---------- Base ---------- */
html, body { background: var(--color-bg); color: var(--color-text); }
body {
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.6;
}
a {
  color: var(--color-link);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}
a:hover { border-bottom-color: var(--color-link); }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.005em; }

/* ---------- Layout shell ---------- */
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  padding: 32px 20px;
  border-right: 1px solid #ebe7de;
  background: var(--color-bg);
  position: sticky;
  top: 0;
  align-self: flex-start;
  height: 100vh;
  overflow-y: auto;
}
.sidebar .brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #8c8897;
  margin-bottom: 20px;
  padding-left: 6px;
}
.nav-item {
  display: block;
  font-family: var(--font-nav);
  font-size: 16px;
  padding: 10px 18px;
  border: 1.5px solid var(--color-text);
  border-radius: 4px;
  margin-bottom: 10px;
  text-align: center;
  color: var(--color-text);
  background: var(--color-bg);
  border-bottom: 1.5px solid var(--color-text); /* override anchor underline */
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}
.nav-item:hover {
  background: var(--color-tint);
  border-color: var(--color-text);
}
.nav-item.active {
  background: var(--gradient-accent);
  color: var(--color-white);
  border-color: transparent;
}
.nav-item.active:hover { background: var(--gradient-accent); }

.main {
  flex: 1;
  min-width: 0;
}

/* ---------- Top bar ---------- */
.topbar {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 16px;
  padding: 20px 40px;
  border-bottom: 1px solid #ebe7de;
  background: var(--color-bg);
}
.topbar .site-title {
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text);
  text-align: center;
  padding-left: 180px; /* visually center despite right-side buttons */
}
.topbar .site-title .dot {
  display: inline-block;
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--color-blue);
  vertical-align: middle;
  margin: 0 6px 3px;
}
.enroll-btn {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #fff;
  padding: 10px 18px;
  border-radius: 4px;
  background: var(--gradient-accent);
  border: none;
  border-bottom: none !important;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.enroll-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(31, 127, 209, 0.28);
}
.social {
  display: flex; gap: 10px; align-items: center;
}
.social a {
  width: 32px; height: 32px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--color-blue-deep);
  border: 1.5px solid var(--color-blue-deep);
  border-bottom: 1.5px solid var(--color-blue-deep);
  transition: background 0.2s ease, color 0.2s ease;
}
.social a:hover { background: var(--color-blue-deep); color: #fff; }
.social svg { width: 16px; height: 16px; display: block; }

/* ---------- Content container ---------- */
.content {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 56px 40px 80px;
}

/* ---------- Hero / welcome ---------- */
.welcome {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 72px;
  line-height: 1;
  letter-spacing: -0.01em;
  text-align: center;
  margin-bottom: 10px;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.welcome.small { font-size: 56px; }
.welcome.tight { margin-bottom: 4px; }

/* Breadcrumb */
.crumbs {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #8c8897;
  margin-bottom: 28px;
}
.crumbs a { color: #6b6865; border-bottom: none; }
.crumbs a:hover { color: var(--color-blue-deep); }
.crumbs .sep { margin: 0 8px; color: #c8c4bb; }

/* Sub-nav (submenu links under sidebar items) */
.sub-nav {
  padding: 4px 0 10px 8px;
  margin-bottom: 10px;
  margin-top: -6px;
}
.sub-nav a {
  display: block;
  font-family: var(--font-nav);
  font-size: 14px;
  padding: 5px 12px;
  color: #6b6865;
  border-left: 2px solid #d8d4cb;
  border-bottom: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.sub-nav a:hover, .sub-nav a.active {
  color: var(--color-blue-deep);
  border-left-color: var(--color-blue);
}
.kicker {
  font-family: var(--font-nav);
  font-size: 18px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-align: center;
  color: var(--color-text);
  margin-bottom: 14px;
}
.rule {
  width: 56px; height: 3px;
  margin: 0 auto 22px;
  background: var(--gradient-accent);
  border-radius: 2px;
}
.lede {
  font-size: 20px;
  line-height: 1.55;
  text-align: center;
  color: var(--color-text);
  max-width: 620px;
  margin: 0 auto 40px;
}

/* ---------- Section blocks ---------- */
section { margin-bottom: 64px; }
section h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 32px;
  line-height: 1.15;
  color: var(--color-text);
  margin-bottom: 16px;
  letter-spacing: -0.005em;
}
section h2 .accent {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
section p + p { margin-top: 1em; }

/* Image placeholder (tasteful gray block with label) */
.img-placeholder {
  background: linear-gradient(135deg, #d6d0c2, #b9b0a0);
  border-radius: 6px;
  aspect-ratio: 16 / 9;
  position: relative;
  overflow: hidden;
  margin: 8px 0 20px;
}
.img-placeholder::after {
  content: attr(data-label);
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.85);
  white-space: nowrap;
}

/* Real photo container */
.photo {
  border-radius: 6px;
  overflow: hidden;
  margin: 8px 0 20px;
  background: #e8e5df;
  position: relative;
}
.photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.photo.hero {
  aspect-ratio: 21/9;
  max-height: 520px;
}
.photo.wide { aspect-ratio: 16/9; }
.photo.square { aspect-ratio: 1/1; }
.photo.portrait { aspect-ratio: 4/5; }
.photo.tall { aspect-ratio: 3/4; }

/* Photo grid — for galleries on Flagship and Concept */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 16px 0 24px;
}
.photo-grid .photo { margin: 0; aspect-ratio: 1/1; }
.photo-grid.asym {
  grid-template-columns: 2fr 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  aspect-ratio: 16/9;
}
.photo-grid.asym .photo:nth-child(1) { grid-row: 1 / 3; aspect-ratio: auto; }
.photo-grid.asym .photo { aspect-ratio: auto; }
.img-caption {
  font-family: var(--font-body);
  font-style: italic;
  font-size: 14px;
  color: #6b6865;
  text-align: center;
  margin-bottom: 40px;
}

/* ---------- Three pillars ---------- */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.pillar {
  padding: 28px 24px;
  background: #fbf9f5;
  border: 1px solid #ebe7de;
  border-radius: 6px;
}
.pillar .pillar-num {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-blue);
  margin-bottom: 10px;
  font-weight: 600;
}
.pillar h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
}
.pillar.full {
  padding: 32px 32px;
  grid-column: 1 / -1; /* full-width rows for the expanded pillar variant */
}
.pillar.full h3 { font-size: 24px; }
.pillar ul {
  padding-left: 20px;
  margin-top: 10px;
  font-size: 15px;
}
.pillar ul li { margin-bottom: 4px; }
.pillar p {
  font-size: 16px;
  line-height: 1.55;
  color: var(--color-text);
}

/* ---------- The fire / "Fifteen Days" block ---------- */
.story-block {
  max-width: 620px;
  margin: 0 auto;
  text-align: center;
  padding: 48px 20px;
  border-top: 1px solid #ebe7de;
  border-bottom: 1px solid #ebe7de;
}
.story-block .big-number {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 96px;
  line-height: 1;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}
.story-block .big-label {
  font-family: var(--font-nav);
  font-size: 16px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: 24px;
}
.story-block p {
  font-size: 18px;
  line-height: 1.6;
  color: var(--color-text);
  text-align: left;
}
.story-block p + p { margin-top: 14px; }

/* ---------- Flagship split ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: center;
}
.split .img-placeholder { aspect-ratio: 4 / 5; margin: 0; }
.split h2 { margin-bottom: 14px; }
.split p { font-size: 17px; line-height: 1.6; }
.split.reverse > :first-child { order: 2; }
.split .photo { margin: 0; }
.split .stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 22px 0 20px;
  padding: 18px 0;
  border-top: 1px solid #ebe7de;
  border-bottom: 1px solid #ebe7de;
}
.split .stats .stat .n {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 28px;
  color: var(--color-blue-deep);
  line-height: 1;
}
.split .stats .stat .l {
  font-family: var(--font-nav);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #6b6865;
  margin-top: 4px;
}

/* ---------- Licensing CTA section ---------- */
.cta-block {
  background: var(--gradient-accent);
  border-radius: 8px;
  padding: 48px 40px;
  color: #fff;
  text-align: center;
}
.cta-block h2 { color: #fff; font-size: 30px; margin-bottom: 12px; }
.cta-block p {
  color: rgba(255,255,255,0.92);
  font-size: 17px;
  line-height: 1.6;
  max-width: 560px;
  margin: 0 auto 24px;
}
.cta-row {
  display: flex; gap: 12px; justify-content: center; flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 12px 20px;
  border-radius: 4px;
  border-bottom: none !important;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}
.btn-solid {
  background: #fff;
  color: var(--color-blue-deep);
}
.btn-solid:hover { transform: translateY(-1px); background: #fff; }
.btn-outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.7);
}
.btn-outline:hover { background: rgba(255,255,255,0.12); }

/* ---------- Forms ---------- */
form.inquiry {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}
form.inquiry label {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
}
form.inquiry input[type="text"],
form.inquiry input[type="email"],
form.inquiry textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 17px;
  padding: 12px 14px;
  background: #fff;
  color: var(--color-text);
  border: 1.5px solid #d8d4cb;
  border-radius: 4px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
form.inquiry input:focus,
form.inquiry textarea:focus {
  outline: none;
  border-color: var(--color-blue);
  box-shadow: 0 0 0 3px rgba(31,127,209,0.15);
}
form.inquiry textarea { min-height: 140px; resize: vertical; }
form.inquiry .submit-row {
  display: flex; gap: 12px; align-items: center; margin-top: 8px;
}
.btn-submit {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #fff;
  padding: 12px 24px;
  border: none;
  border-radius: 4px;
  background: var(--gradient-accent);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.btn-submit:hover { transform: translateY(-1px); box-shadow: 0 6px 14px rgba(31,127,209,0.28); }

/* ---------- Callout box ---------- */
.callout {
  background: #fbf9f5;
  border-left: 3px solid var(--color-blue);
  padding: 20px 24px;
  margin: 28px 0;
  border-radius: 0 6px 6px 0;
}
.callout .label {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-blue-deep);
  font-weight: 600;
  margin-bottom: 6px;
}
.callout p { font-size: 16px; line-height: 1.55; }
.callout p + p { margin-top: 10px; }

/* ---------- Timeline ---------- */
.timeline {
  margin: 20px 0 40px;
  padding-left: 4px;
}
.timeline-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid #ebe7de;
}
.timeline-item:last-child { border-bottom: none; }
.timeline-item .when {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  color: var(--color-blue-deep);
  letter-spacing: 0.04em;
}
.timeline-item .what h4 {
  font-family: var(--font-display);
  font-size: 18px;
  margin-bottom: 4px;
  color: var(--color-text);
}
.timeline-item .what p { font-size: 16px; line-height: 1.55; }

/* ---------- Anchor scroll offset ---------- */
h2[id], h3[id], section[id] { scroll-margin-top: 24px; }

/* ---------- Quote ---------- */
blockquote {
  font-family: var(--font-body);
  font-style: italic;
  font-size: 20px;
  line-height: 1.5;
  color: var(--color-text);
  padding: 12px 0 12px 24px;
  border-left: 3px solid var(--color-blue);
  margin: 24px 0;
}
blockquote cite {
  display: block;
  font-family: var(--font-display);
  font-style: normal;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #6b6865;
  margin-top: 10px;
}

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid #ebe7de;
  padding: 36px 40px;
  font-size: 14px;
  color: #6b6865;
  text-align: center;
  line-height: 1.6;
}
footer .legal { margin-bottom: 8px; }
footer a { color: var(--color-blue-deep); }

/* ---------- Mobile menu ---------- */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  padding: 6px;
  cursor: pointer;
  color: var(--color-text);
}
.mobile-toggle svg { width: 24px; height: 24px; display: block; }

.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 200;
  padding: 80px 28px 40px;
  overflow-y: auto;
}
.mobile-overlay.open { display: block; }
.mobile-overlay .close {
  position: absolute;
  top: 14px; right: 14px;
  background: none; border: none;
  font-size: 28px; line-height: 1;
  color: var(--color-text);
  cursor: pointer;
  padding: 8px 12px;
}
.mobile-overlay .mobile-brand {
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-blue-deep);
  margin-bottom: 24px;
  text-align: center;
}
.mobile-overlay a.mobile-link {
  display: block;
  font-family: var(--font-nav);
  font-size: 20px;
  padding: 14px 0;
  color: var(--color-text);
  border-bottom: 1px solid #ebe7de;
  text-align: center;
}
.mobile-overlay a.mobile-link:last-child { border-bottom: none; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .sidebar { display: none; }
  .topbar { padding: 14px 20px; grid-template-columns: auto 1fr auto; gap: 10px; }
  .topbar .site-title { padding-left: 0; text-align: left; font-size: 12px; }
  .topbar .enroll-btn { padding: 8px 12px; font-size: 11px; }
  .social { display: none; }
  .mobile-toggle { display: inline-flex; }
  .content { padding: 36px 20px 60px; }
  .welcome { font-size: 44px; }
  .welcome.small { font-size: 36px; }
  .lede { font-size: 17px; }
  section h2 { font-size: 26px; }
  .pillars { grid-template-columns: 1fr; gap: 16px; }
  .split { grid-template-columns: 1fr; gap: 20px; }
  .split.reverse > :first-child { order: 0; }
  .story-block .big-number { font-size: 72px; }
  .cta-block { padding: 32px 24px; }
  .photo-grid { grid-template-columns: 1fr 1fr; }
  .photo-grid.asym { grid-template-columns: 1fr; grid-template-rows: auto; aspect-ratio: auto; }
  .photo-grid.asym .photo:nth-child(1) { grid-row: auto; }
  .timeline-item { grid-template-columns: 1fr; gap: 4px; }
  .timeline-item .when { font-size: 13px; }
}