/* ============================================================
   RIDGE & RIVER HEATING — HVAC concept demo
   Character: night cooling. Deep navy stage, ice type,
   flowing air streams, glass surfaces, coral signal glows.
   ============================================================ */

@font-face {
  font-family: "Archivo";
  src: url("../../assets/fonts/archivo-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Archivo";
  src: url("../../assets/fonts/archivo-600.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Archivo";
  src: url("../../assets/fonts/archivo-700.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("../../assets/fonts/plex-mono-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("../../assets/fonts/plex-mono-600.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

:root {
  --night: #0c1420;
  --night-deep: #0a101a;
  --surface: rgba(238, 244, 250, 0.045);
  --surface-raise: rgba(238, 244, 250, 0.075);
  --line: rgba(238, 244, 250, 0.14);
  --line-soft: rgba(238, 244, 250, 0.07);
  --text: #eef4fa;
  --muted: #9db0c6;
  --coral: #c23a20;
  --coral-bright: #ff8a63;
  --coral-glow: rgba(255, 138, 99, 0.32);
  --ice: #eef4fa;
  --air: #9cc3e8;
  --air-soft: #dbeaf6;
  --white: #ffffff;
  --ink: #0a101a;
  --lift: 0 24px 56px rgba(3, 7, 13, 0.6);
  --body: "Archivo", "Segoe UI", Tahoma, sans-serif;
  --utility: "IBM Plex Mono", Consolas, "Courier New", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--night);
  color: var(--text);
  font-family: var(--body);
  font-size: 18px;
  line-height: 1.65;
}

main > section > *,
header > *,
footer > * {
  min-width: 0;
}

h1, h2, h3, p, li, a, strong, span, small, b {
  overflow-wrap: break-word;
}

a {
  color: inherit;
}

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

.skip-link {
  position: fixed;
  top: 0;
  left: 1rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  background: var(--ice);
  color: var(--ink);
  transform: translateY(-120%);
}

.skip-link:focus {
  transform: translateY(0);
}

:focus-visible {
  outline: 3px solid var(--coral-bright);
  outline-offset: 4px;
}

::selection {
  background: var(--air-soft);
  color: var(--ink);
}

/* ---------- type ---------- */

h1, h2, h3 {
  margin-top: 0;
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.03em;
}

h1 {
  max-width: 640px;
  margin-bottom: 1.5rem;
  font-size: clamp(2.6rem, 5.6vw, 4.6rem);
}

h1 .accent,
h2 .accent {
  color: var(--coral-bright);
}

h2 {
  font-size: clamp(1.9rem, 3.8vw, 3.1rem);
}

h3 {
  font-size: clamp(1.2rem, 2.2vw, 1.55rem);
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--coral-bright);
  font-family: var(--utility);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "// ";
  color: var(--line);
}

/* ---------- disclosure + header ---------- */

.concept-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  padding: 0.34rem 5vw;
  background: rgba(238, 244, 250, 0.07);
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--utility);
  font-size: 0.68rem;
}

.concept-bar strong {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text);
}

.concept-bar span {
  color: var(--muted);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  width: min(1180px, calc(100% - 3rem));
  margin-inline: auto;
  min-height: 84px;
  border-bottom: 1px solid var(--line-soft);
  background: rgba(12, 20, 32, 0.72);
  -webkit-backdrop-filter: blur(14px) saturate(1.15);
  backdrop-filter: blur(14px) saturate(1.15);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  text-decoration: none;
}

.logo-mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  background: var(--coral-bright);
  color: var(--ink);
  font-family: var(--utility);
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 10px;
  box-shadow: 0 0 24px var(--coral-glow);
}

.logo-name {
  font-weight: 700;
  font-size: 0.92rem;
  line-height: 1.15;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

nav {
  display: flex;
  align-items: center;
  gap: 1.6rem;
}

nav a {
  font-family: var(--utility);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted);
}

nav a:not(.nav-cta):hover {
  color: var(--text);
}

.nav-cta {
  padding: 0.62rem 1rem;
  background: var(--coral-bright);
  color: var(--ink);
  font-family: var(--body);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 999px;
  box-shadow: 0 0 22px var(--coral-glow);
  transition: background 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.nav-cta:hover {
  background: var(--air-soft);
  transform: translateY(-1px);
  box-shadow: 0 0 30px rgba(219, 234, 246, 0.35);
}

main > section,
footer {
  width: min(1180px, calc(100% - 3rem));
  margin-inline: auto;
}

/* ---------- hero: canvas stage ---------- */

.hero {
  position: relative;
  display: block;
  padding: 0 0 clamp(3.5rem, 8vh, 6rem);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(1180px, calc(100% - 3rem));
  pointer-events: none;
}

.field-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: block;
}

.hero-copy {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: clamp(2.5rem, 5vw, 5rem);
  align-items: center;
  width: min(1180px, calc(100% - 3rem));
  margin-inline: auto;
  min-height: max(78vh, 620px);
  padding-block: clamp(3rem, 7vh, 5rem) 0;
  text-shadow: 0 2px 26px rgba(6, 11, 18, 0.8);
}

.lede {
  max-width: 600px;
  color: var(--muted);
  font-size: clamp(1.02rem, 1.9vw, 1.25rem);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.3rem;
  margin: 2rem 0 1.6rem;
}

.primary {
  display: inline-flex;
  align-items: center;
  min-height: 54px;
  padding: 0.8rem 1.6rem;
  background: var(--coral-bright);
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  box-shadow: 0 0 28px var(--coral-glow);
  transition: background 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.primary:hover {
  background: var(--air-soft);
  color: var(--ink);
  transform: translateY(-2px);
  box-shadow: 0 0 36px rgba(219, 234, 246, 0.4);
}

.quiet-link {
  font-family: var(--utility);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-underline-offset: 5px;
  color: var(--text);
}

.quiet-link:hover {
  color: var(--coral-bright);
}

.call-path {
  max-width: 520px;
  padding: 0.9rem 1.1rem;
  border-left: 3px solid var(--coral-bright);
  border-radius: 0 12px 12px 0;
  background: var(--surface);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.call-path span {
  display: block;
  font-family: var(--utility);
  font-size: 0.64rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.call-path strong {
  font-size: 0.88rem;
}

/* ---------- machine illustration (glass card) ---------- */

.air-machine {
  position: relative;
  padding: 0;
}

.machine-disc {
  position: absolute;
  top: -8%;
  right: -10%;
  width: 320px;
  height: 320px;
  background: rgba(156, 195, 232, 0.05);
  border: 1px solid var(--line-soft);
  border-radius: 50%;
  box-shadow: 0 0 60px rgba(156, 195, 232, 0.08);
}

.air-machine svg {
  position: relative;
  display: block;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 18px 40px rgba(3, 7, 13, 0.55));
}

.air-machine svg .air-line {
  fill: none;
  stroke: var(--air);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-dasharray: 900;
  stroke-dashoffset: 900;
  animation: draw-line 1.6s cubic-bezier(0.22, 0.61, 0.2, 1) forwards;
}

.air-machine svg .air-line.two { animation-delay: 0.18s; opacity: 0.7; }
.air-machine svg .air-line.three { animation-delay: 0.36s; opacity: 0.45; }

@keyframes draw-line {
  to { stroke-dashoffset: 0; }
}

.air-machine svg .unit {
  fill: rgba(12, 20, 32, 0.85);
  stroke: var(--air-soft);
  stroke-width: 2;
}

.air-machine svg .louvers line {
  stroke: var(--air-soft);
  stroke-width: 1.5;
  opacity: 0.45;
}

.air-machine svg .fan-ring {
  fill: rgba(10, 16, 26, 0.6);
  stroke: var(--air);
  stroke-width: 2;
}

.air-machine svg .fan-blade {
  fill: rgba(156, 195, 232, 0.16);
  stroke: var(--air-soft);
  stroke-width: 1.5;
}

.air-machine svg .fan-hub {
  fill: var(--coral-bright);
  stroke: var(--air-soft);
  stroke-width: 1.5;
}

.air-machine svg .fan-rotor {
  transform-origin: 285px 304px;
  animation: rotor-turn 16s linear infinite;
}

@keyframes rotor-turn {
  to { transform: rotate(360deg); }
}

.air-machine svg .unit-base,
.air-machine svg .refrigerant {
  stroke: var(--air-soft);
  stroke-width: 2.5;
}

.air-machine svg .refrigerant.thin {
  stroke-width: 1.5;
  opacity: 0.5;
}

.machine-caption {
  margin: 0.8rem 0 0;
  color: var(--muted);
  font-family: var(--utility);
  font-size: 0.7rem;
}

/* ---------- issue router ---------- */

.issue-router {
  padding-block: clamp(3.5rem, 8vh, 6rem);
  border-top: 1px solid var(--line-soft);
}

.router-heading {
  max-width: 640px;
  margin-bottom: 2.6rem;
}

.router-heading p:not(.eyebrow) {
  color: var(--muted);
}

.issue-lines {
  display: flex;
  flex-direction: column;
}

.issue-lines a {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) 48px;
  gap: 1.4rem;
  align-items: center;
  padding: 1.35rem 0.6rem;
  border-top: 1px solid var(--line-soft);
  text-decoration: none;
  border-left: 3px solid transparent;
  border-radius: 0 12px 12px 0;
  background: transparent;
  transition: border-left-color 0.15s ease, background 0.15s ease, padding-left 0.15s ease;
}

.issue-lines a:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.issue-lines a:hover,
.issue-lines a:focus-visible {
  border-left-color: var(--coral-bright);
  background: var(--surface);
  padding-left: 1.1rem;
}

.issue-index {
  color: var(--air);
  font-family: var(--utility);
  font-size: 1.5rem;
  font-weight: 600;
}

.issue-lines a:hover .issue-index {
  color: var(--coral-bright);
}

.issue-body b {
  display: block;
  font-size: 1.12rem;
  font-weight: 700;
}

.issue-body small {
  color: var(--muted);
  font-size: 0.88rem;
}

.issue-arrow {
  justify-self: end;
  color: var(--air-soft);
  font-size: 1.3rem;
  transition: transform 0.15s ease;
}

.issue-lines a:hover .issue-arrow {
  color: var(--coral-bright);
  transform: translateX(6px);
}

/* ---------- before-call (glass panel) ---------- */

.before-call {
  padding-block: clamp(3.5rem, 8vh, 6rem);
  margin-block: clamp(3rem, 6vh, 5rem);
  background: var(--surface);
  border: 1px solid var(--line-soft);
  border-radius: 20px;
  box-shadow: var(--lift);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  width: min(1180px, calc(100% - 3rem));
}

.before-heading {
  max-width: 640px;
  margin-bottom: 2.4rem;
  padding-inline: clamp(1.4rem, 4vw, 3.2rem);
}

.before-heading .eyebrow {
  color: var(--air);
}

.before-heading .eyebrow::before {
  color: var(--line);
}

.before-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin: 0;
  padding: 0 clamp(1.4rem, 4vw, 3.2rem) clamp(1.4rem, 4vw, 2.8rem);
  list-style: none;
}

.before-grid li {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 1rem;
  padding: 1.3rem 0;
  border-top: 1px solid var(--line-soft);
}

.before-grid span {
  color: var(--air);
  font-family: var(--utility);
  font-weight: 600;
}

.before-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 0.96rem;
}

.before-grid strong {
  color: var(--text);
}

/* ---------- expect ---------- */

.expect {
  padding-block: clamp(3.5rem, 8vh, 6rem);
}

.expect-heading {
  max-width: 700px;
  margin-bottom: 2.6rem;
}

.expect-track {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: stage;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
}

.expect-track li {
  counter-increment: stage;
  position: relative;
  padding: 1.6rem 1.8rem 0 0;
  border-top: 2px solid var(--air);
}

.expect-track li::before {
  content: "0" counter(stage);
  position: absolute;
  top: -1.7rem;
  left: 0;
  color: var(--coral-bright);
  font-family: var(--utility);
  font-size: 0.9rem;
  font-weight: 600;
}

.stage {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--muted);
  font-family: var(--utility);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.expect-track h3 {
  margin-bottom: 0.55rem;
}

.expect-track p {
  color: var(--muted);
  font-size: 0.95rem;
}

/* ---------- request ---------- */

.request {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(2.5rem, 5vw, 5rem);
  padding-block: clamp(3.5rem, 8vh, 6rem);
  border-top: 1px solid var(--line-soft);
}

.request-copy h2 {
  margin-bottom: 1.2rem;
}

.request-copy > p:not(.eyebrow) {
  color: var(--muted);
}

.request-staging {
  margin-top: 1.8rem;
  padding: 1rem 1.2rem;
  border-left: 3px solid var(--air);
  border-radius: 0 12px 12px 0;
  background: var(--surface);
  font-size: 0.85rem;
}

.request-staging p {
  margin: 0;
  color: var(--muted);
}

form {
  padding: clamp(1.4rem, 3vw, 2.2rem);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--lift);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.field {
  margin-bottom: 1.2rem;
}

label {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--utility);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

input,
select,
textarea {
  width: 100%;
  min-height: 50px;
  padding: 0.65rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(10, 16, 26, 0.65);
  color: var(--text);
  font: inherit;
}

input::placeholder,
textarea::placeholder {
  color: rgba(157, 176, 198, 0.55);
}

input:hover,
select:hover,
textarea:hover {
  border-color: rgba(238, 244, 250, 0.4);
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  border-color: var(--coral-bright);
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 138, 99, 0.22);
}

textarea {
  resize: vertical;
}

.field-error {
  display: block;
  min-height: 1.3em;
  color: var(--coral-bright);
  font-size: 0.74rem;
}

form button {
  display: inline-flex;
  align-items: center;
  min-height: 54px;
  padding: 0.8rem 1.6rem;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--coral-bright);
  color: var(--ink);
  font-family: var(--body);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: 0 0 28px var(--coral-glow);
  transition: background 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

form button:hover {
  background: var(--air-soft);
  color: var(--ink);
  transform: translateY(-2px);
  box-shadow: 0 0 36px rgba(219, 234, 246, 0.4);
}

.form-status {
  min-height: 1.6em;
  margin: 1rem 0 0;
  color: var(--air);
  font-weight: 700;
}

/* ---------- footer ---------- */

footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.6rem 0 2.2rem;
  border-top: 1px solid var(--line-soft);
  font-size: 0.76rem;
  color: var(--muted);
}

footer p {
  margin: 0;
}

footer a {
  font-family: var(--utility);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

footer a:hover {
  color: var(--coral-bright);
}

/* ---------- reveals ---------- */

.js [data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 0.61, 0.2, 1);
}

.js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

.d1 { transition-delay: 0.08s; }
.d2 { transition-delay: 0.16s; }
.d3 { transition-delay: 0.24s; }
.d4 { transition-delay: 0.32s; }

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .hero-copy {
    grid-template-columns: 1fr;
    min-height: 0;
    gap: 2.6rem;
  }

  .air-machine {
    max-width: 480px;
  }

  .machine-disc {
    width: 240px;
    height: 240px;
  }

  .expect-track {
    grid-template-columns: 1fr;
    gap: 2.2rem;
  }

  .expect-track li {
    padding-right: 0;
  }

  nav {
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .site-header {
    align-items: flex-start;
    padding-block: 1.1rem;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .site-header,
  main > section,
  .before-call,
  footer {
    width: min(100% - 1.5rem, 1180px);
  }

  .hero-copy {
    width: min(100% - 1.5rem, 1180px);
  }

  nav {
    width: 100%;
    gap: 0.7rem;
  }

  nav a:not(.nav-cta) {
    display: none;
  }

  .issue-lines a {
    grid-template-columns: 44px 1fr;
    gap: 0.9rem;
  }

  .issue-arrow {
    display: none;
  }

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

  .field-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .primary,
  form button {
    width: 100%;
  }
}

/* ---------- reduced motion ---------- */

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .air-machine svg .air-line {
    stroke-dashoffset: 0;
    animation: none;
  }

  .air-machine svg .fan-rotor {
    animation: none;
  }
}