/* sediment-atlas-v1 — editorial earth-tone layout system */

:root {
  --gl-bg: #f8f1de;
  --gl-bg-alt: #efe0cd;
  --gl-surface: #fffdf8;
  --gl-ink: #4f220f;
  --gl-ink-muted: #607556;
  --gl-accent: #9c6638;
  --gl-accent-alt: #b96a4c;
  --gl-line: rgba(79, 34, 15, 0.14);
  --gl-line-strong: rgba(79, 34, 15, 0.28);
  --rail-w: clamp(220px, 16vw, 300px);
  --page-max: min(1680px, calc(100vw - var(--rail-w) - 4rem));
  --section-gap: clamp(3rem, 6vw, 6rem);
  --radius-sm: 6px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --font-display: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --shadow-soft: 0 18px 48px rgba(79, 34, 15, 0.08);
  --shadow-card: 0 8px 28px rgba(79, 34, 15, 0.06);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.62;
  color: var(--gl-ink);
  background: var(--gl-bg);
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--gl-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--gl-accent-alt);
}

.page-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: var(--rail-w) minmax(0, 1fr);
}

.site-rail {
  position: sticky;
  top: 0;
  align-self: start;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  padding: clamp(1.25rem, 2vw, 2rem);
  background: linear-gradient(180deg, #4f220f 0%, #283339 100%);
  color: #f8f1de;
  border-right: 1px solid rgba(248, 241, 222, 0.12);
  z-index: 40;
}

.rail-brand-row {
  display: flex;
  align-items: center;
}

.brand {
  display: grid;
  grid-template-columns: min(64px, 100%) 1fr;
  align-items: center;
  gap: 0.75rem;
  color: inherit;
  text-decoration: none;
}

.brand-logo {
  width: 64px;
  height: 64px;
  flex-shrink: 0;
}

.brand-logo svg {
  width: 64px;
  height: 64px;
}

.brand > span:last-child {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.15;
}

.brand small {
  font-size: 0.72rem;
  font-weight: 500;
  opacity: 0.72;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.rail-nav-row {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  flex: 1;
}

.rail-nav-row a {
  display: block;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-sm);
  color: rgba(248, 241, 222, 0.88);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: background 0.2s ease, color 0.2s ease;
}

.rail-nav-row a:hover {
  background: rgba(248, 241, 222, 0.1);
  color: #fff;
}

.rail-cta-row {
  display: flex;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 44px;
  padding: 0.65rem 1rem;
  border-radius: 999px;
  background: var(--gl-accent-alt);
  color: #fffdf8;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.header-cta:hover {
  background: #c47a52;
  color: #fff;
}

.page-canvas {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.page-main {
  flex: 1;
  width: min(var(--page-max), calc(100% - clamp(1.5rem, 4vw, 4rem) * 2));
  margin-inline: auto;
  padding-block: clamp(1.5rem, 3vw, 2.5rem);
}

.section-inner {
  width: 100%;
}

.section {
  padding-block: var(--section-gap);
  border-bottom: 1px solid var(--gl-line);
}

.section:last-of-type {
  border-bottom: 0;
}

.section-heading {
  max-width: 52rem;
  margin-bottom: clamp(1.75rem, 3vw, 2.75rem);
}

.section-kicker {
  display: inline-block;
  margin-bottom: 0.75rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gl-accent);
}

.section-heading h2 {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.2vw, 2.85rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 600;
}

.section-heading p {
  margin: 0;
  color: var(--gl-ink-muted);
  font-size: clamp(1rem, 1.35vw, 1.12rem);
  max-width: 46rem;
}

/* Hero — editorial stack composition */

.hero {
  position: relative;
  padding-block: clamp(1rem, 2vw, 2rem) clamp(2rem, 4vw, 3.5rem);
}

.hero-grid {
  display: grid;
  gap: clamp(1.75rem, 3vw, 2.75rem);
}

.hero-copy {
  display: grid;
  gap: 1.1rem;
  max-width: 44rem;
}

.eyebrow {
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gl-accent);
}

.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.8vw, 3.75rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  font-weight: 600;
}

.lead {
  margin: 0;
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  color: var(--gl-ink-muted);
  max-width: 38rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 0.35rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.7rem 1.35rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.94rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.button-primary {
  background: var(--gl-ink);
  color: var(--gl-bg);
}

.button-primary:hover {
  background: #7b2524;
  color: #fffdf8;
}

.button-secondary {
  background: transparent;
  color: var(--gl-ink);
  border-color: var(--gl-line-strong);
}

.button-secondary:hover {
  border-color: var(--gl-accent);
  color: var(--gl-accent);
}

.geo-line {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gl-accent-alt);
}

.hero-visual {
  position: relative;
  isolation: isolate;
  min-height: clamp(280px, 38vw, 520px);
  border-radius: var(--gl-radius-lg, var(--radius-lg));
  overflow: hidden;
  background: linear-gradient(145deg, #283339 0%, #2b5748 55%, #4f220f 100%);
  box-shadow: var(--shadow-soft);
}

.hero-visual > svg {
  width: 100%;
  height: auto;
  min-height: clamp(280px, 38vw, 520px);
  object-fit: cover;
}

/* Services — masonry bento */

.cards-grid {
  display: grid;
  gap: 1rem;
}

.services-bento {
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.services-bento .card {
  grid-column: span 4;
}

.services-bento .card:nth-child(1),
.services-bento .card:nth-child(4),
.services-bento .card:nth-child(7) {
  grid-column: span 5;
}

.services-bento .card:nth-child(2),
.services-bento .card:nth-child(5) {
  grid-column: span 7;
}

.services-bento .card:nth-child(3),
.services-bento .card:nth-child(6) {
  grid-column: span 6;
}

.card {
  background: var(--gl-surface);
  border: 1px solid var(--gl-line);
  border-radius: var(--radius-md);
  padding: clamp(1.1rem, 2vw, 1.5rem);
  box-shadow: var(--shadow-card);
  display: grid;
  gap: 0.55rem;
  align-content: start;
}

.card-icon {
  width: 2.25rem;
  height: 2.25rem;
  color: var(--gl-accent);
}

.card-icon svg {
  width: 100%;
  height: 100%;
}

.card-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gl-accent-alt);
}

.card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
  line-height: 1.2;
}

.card p {
  margin: 0;
  color: var(--gl-ink-muted);
  font-size: 0.96rem;
}

.card-value {
  font-size: 0.88rem;
  color: var(--gl-ink);
}

.card small {
  font-size: 0.78rem;
  color: var(--gl-ink-muted);
}

/* Benefits — staggered columns */

.benefits-mosaic {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.benefits-mosaic .card:nth-child(2) {
  transform: translateY(1.25rem);
}

.benefits-mosaic .card:nth-child(5) {
  transform: translateY(0.75rem);
}

/* Geography — ledger panels */

.geo-chips {
  display: grid;
  gap: 1rem;
}

.geo-ledger {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.geo-chip {
  background: var(--gl-bg-alt);
  border: 1px solid var(--gl-line);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: grid;
  gap: 0.65rem;
}

.geo-chip strong {
  font-family: var(--font-display);
  font-size: 1.15rem;
  line-height: 1.25;
}

.geo-chip span {
  color: var(--gl-ink-muted);
  font-size: 0.94rem;
}

/* Process — vertical rail timeline */

.process-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  position: relative;
}

.process-timeline {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1rem;
}

.process-timeline::before {
  content: "";
  position: absolute;
  top: 1.75rem;
  left: 5%;
  right: 5%;
  height: 2px;
  background: linear-gradient(90deg, var(--gl-accent) 0%, var(--gl-accent-alt) 100%);
  opacity: 0.35;
}

.process-timeline li {
  position: relative;
  display: grid;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem 0;
  background: var(--gl-surface);
  border: 1px solid var(--gl-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}

.step-icon {
  width: 2.5rem;
  height: 2.5rem;
  color: var(--gl-accent);
}

.step-icon svg {
  width: 100%;
  height: 100%;
}

.process-timeline h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  line-height: 1.25;
}

.process-timeline p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--gl-ink-muted);
}

/* Scenarios — horizontal cards */

.scenarios-row {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* Guide — magazine two-column */

.guide-chapters-stack {
  display: grid;
  gap: 1.25rem;
}

.guide-body .chapter {
  display: grid;
  grid-template-columns: minmax(12rem, 18rem) minmax(0, 1fr);
  gap: clamp(1rem, 2.5vw, 2rem);
  padding: clamp(1.25rem, 2vw, 1.75rem);
  background: var(--gl-surface);
  border: 1px solid var(--gl-line);
  border-radius: var(--radius-md);
}

.chapter h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
  line-height: 1.25;
  color: var(--gl-accent);
}

.chapter p {
  margin: 0 0 0.85rem;
  color: var(--gl-ink-muted);
}

.chapter ul {
  margin: 0;
  padding-left: 1.15rem;
  display: grid;
  gap: 0.45rem;
}

.chapter li {
  color: var(--gl-ink);
  font-size: 0.94rem;
}

/* FAQ */

.faq-accordion {
  display: grid;
  gap: 0.65rem;
  max-width: 52rem;
}

.faq-accordion details {
  background: var(--gl-surface);
  border: 1px solid var(--gl-line);
  border-radius: var(--radius-sm);
  padding: 0.15rem 0.85rem;
}

.faq-accordion summary {
  cursor: pointer;
  font-weight: 600;
  padding: 0.85rem 0.25rem;
  list-style-position: outside;
}

.faq-accordion p {
  margin: 0 0 1rem;
  color: var(--gl-ink-muted);
  padding: 0 0.25rem 0.5rem;
}

/* Contact */

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.contact-form {
  display: grid;
  gap: 1rem;
  background: var(--gl-surface);
  border: 1px solid var(--gl-line);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 2.5vw, 1.75rem);
  box-shadow: var(--shadow-soft);
}

.contact-form label {
  display: grid;
  gap: 0.4rem;
  font-size: 0.88rem;
  font-weight: 600;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--gl-line-strong);
  border-radius: var(--radius-sm);
  background: var(--gl-bg);
  color: var(--gl-ink);
  font: inherit;
}

.contact-form textarea {
  min-height: 110px;
  resize: vertical;
}

.tripscan-disclaimer {
  margin-top: 1rem;
  font-size: 0.82rem;
  color: var(--gl-ink-muted);
}

.form-message {
  font-size: 0.9rem;
  color: var(--gl-accent);
}

/* Footer */

.site-footer {
  margin-top: auto;
  background: #283339;
  color: rgba(248, 241, 222, 0.88);
  padding-block: clamp(2rem, 4vw, 3rem);
}

.footer-grid {
  width: min(var(--page-max), calc(100% - clamp(1.5rem, 4vw, 4rem) * 2));
  margin-inline: auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: #f8f1de;
}

.site-footer p {
  margin: 0.65rem 0 0;
  font-size: 0.92rem;
  line-height: 1.55;
}

.site-footer h3 {
  margin: 0 0 0.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gl-accent-alt);
}

.footer-coverage {
  opacity: 0.72;
}

/* Icon motion — min 10s loops */

.icon-pulse svg {
  animation: iconPulse 12s ease-in-out infinite;
}

.icon-slide svg {
  animation: iconSlide 14s ease-in-out infinite;
}

.icon-spin svg {
  animation: iconSpin 16s linear infinite;
}

.icon-draw svg {
  stroke-dasharray: 120;
  stroke-dashoffset: 120;
  animation: iconDraw 18s ease-in-out infinite;
}

@keyframes iconPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.72; transform: scale(0.94); }
}

@keyframes iconSlide {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(3px); }
}

@keyframes iconSpin {
  to { transform: rotate(360deg); }
}

@keyframes iconDraw {
  0%, 100% { stroke-dashoffset: 120; }
  40%, 60% { stroke-dashoffset: 0; }
}

/* Wide desktop balance */

@media (min-width: 1440px) {
  :root {
    --page-max: min(1720px, calc(100vw - var(--rail-w) - 5rem));
  }

  .page-main {
    padding-block: 2.75rem;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: center;
  }

  .hero-copy {
    order: 1;
  }

  .hero-visual {
    order: 2;
  }
}

@media (min-width: 2160px) {
  :root {
    --page-max: min(1880px, calc(100vw - var(--rail-w) - 6rem));
    --section-gap: 5.5rem;
  }

  body {
    font-size: 1.0625rem;
  }
}

/* Tablet */

@media (max-width: 1100px) {
  .services-bento .card,
  .services-bento .card:nth-child(n) {
    grid-column: span 6;
  }

  .benefits-mosaic {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .benefits-mosaic .card:nth-child(n) {
    transform: none;
  }

  .geo-ledger {
    grid-template-columns: 1fr;
  }

  .process-timeline {
    grid-template-columns: 1fr;
  }

  .process-timeline::before {
    display: none;
  }

  .scenarios-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .guide-body .chapter {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* Mobile — rail becomes top bar */

@media (max-width: 820px) {
  .page-shell {
    grid-template-columns: 1fr;
  }

  .site-rail {
    position: relative;
    min-height: auto;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
  }

  .rail-brand-row {
    flex: 1 1 auto;
    min-width: 0;
  }

  .brand {
    grid-template-columns: 48px 1fr;
  }

  .brand-logo,
  .brand-logo svg {
    width: 48px;
    height: 48px;
  }

  .rail-nav-row {
    flex: 1 1 100%;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.35rem;
  }

  .rail-nav-row a {
    flex: 1 1 calc(50% - 0.35rem);
    text-align: center;
    font-size: 0.82rem;
    padding: 0.5rem;
  }

  .rail-cta-row {
    flex: 1 1 100%;
  }

  .page-main {
    width: calc(100% - 2rem);
    padding-block: 1.25rem;
  }

  .services-bento .card,
  .services-bento .card:nth-child(n) {
    grid-column: span 12;
  }

  .benefits-mosaic,
  .scenarios-row {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .rail-nav-row a {
    flex-basis: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .icon-pulse svg,
  .icon-slide svg,
  .icon-spin svg,
  .icon-draw svg,
  .route-main,
  .city-halo {
    animation: none !important;
  }

  .benefits-mosaic .card:nth-child(n) {
    transform: none;
  }
}