/* Callita Fuel — public site
   Quiet industrial · customer-facing · not a memo */

/* Fonts loaded via <link> in HTML for faster paint */

:root {
  --ink: #141c19;
  --ink-2: #2c3833;
  --muted: #5a6761;
  --line: #d8dfdb;
  --line-soft: #e8edea;
  --paper: #f7f5f0;
  --paper-2: #efece5;
  --white: #ffffff;
  --green: #0d5c4d;
  --green-deep: #083d34;
  --green-soft: #e4f0ec;
  --steel: #3d5a73;
  --steel-soft: #e8eef3;
  --warm: #8b5a2b;
  --shadow: 0 18px 50px rgba(20, 28, 25, 0.08);
  --shadow-sm: 0 4px 16px rgba(20, 28, 25, 0.06);
  --radius: 14px;
  --max: 1140px;
  --font: "DM Sans", system-ui, -apple-system, sans-serif;
  --display: "Instrument Serif", Georgia, "Times New Roman", serif;
}

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

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}

body {
  margin: 0;
  min-width: 320px;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink-2);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--green);
  text-underline-offset: 3px;
}
a:hover { color: var(--green-deep); }

:focus-visible {
  outline: 3px solid var(--steel);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--ink);
  color: #fff;
  padding: 0.75rem 1rem;
}
.skip-link:focus { left: 0.5rem; top: 0.5rem; }

.wrap {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

/* ——— Type ——— */
h1, h2, h3 {
  color: var(--ink);
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

h1 {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(2.4rem, 6vw, 3.65rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
}

h2 {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(1.85rem, 3.8vw, 2.55rem);
}

h3 {
  font-family: var(--font);
  font-weight: 650;
  font-size: 1.08rem;
  letter-spacing: -0.01em;
}

.lede {
  font-size: 1.12rem;
  color: var(--muted);
  max-width: 36rem;
  margin: 0 0 0;
  line-height: 1.65;
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--green);
  margin: 0 0 0.85rem;
}

/* ——— Header ——— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(247, 245, 240, 0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
.site-header.is-scrolled,
.site-header {
  border-bottom-color: var(--line-soft);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--ink);
}
.logo:hover { color: var(--ink); }

.logo-mark { width: 34px; height: 34px; flex-shrink: 0; }

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}
.logo-text strong {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}
.logo-text span {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.nav {
  display: none;
  gap: 1.6rem;
  align-items: center;
}
.nav a {
  color: var(--ink-2);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 550;
}
.nav a:hover { color: var(--green); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header-phone {
  display: none;
  font-weight: 650;
  font-size: 0.95rem;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}
.header-phone:hover { color: var(--green); }

.nav-cta { display: none; }

@media (min-width: 880px) {
  .nav { display: flex; }
  .nav-cta { display: inline-flex; }
  .header-phone { display: inline; }
  .header-mobile-cta { display: none !important; }
}

.founder-line {
  margin: 1.1rem 0 0;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.hp { position: absolute; left: -9999px; height: 0; overflow: hidden; }

/* ——— Buttons ——— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 50px;
  padding: 0.75rem 1.35rem;
  border-radius: 999px;
  font-family: inherit;
  font-weight: 650;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s, transform 0.15s;
}
.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--green);
  color: #fff;
  border-color: var(--green);
}
.btn--primary:hover {
  background: var(--green-deep);
  border-color: var(--green-deep);
  color: #fff;
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn--ghost:hover {
  border-color: var(--ink);
  color: var(--ink);
}

.btn--on-dark {
  background: #fff;
  color: var(--green-deep);
  border-color: #fff;
}
.btn--on-dark:hover {
  background: var(--paper);
  color: var(--green-deep);
}

.btn--ghost-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
}
.btn--ghost-light:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

/* ——— Hero ——— */
.hero {
  position: relative;
  padding: 3.25rem 0 4.5rem;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 100% 0%, rgba(13, 92, 77, 0.12), transparent 55%),
    radial-gradient(ellipse 50% 40% at 0% 100%, rgba(61, 90, 115, 0.08), transparent 50%),
    linear-gradient(180deg, #ebe7df 0%, var(--paper) 70%);
  border-bottom: 1px solid var(--line-soft);
}

.hero-grid {
  display: grid;
  gap: 2.5rem;
  align-items: end;
}

@media (min-width: 920px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3rem;
    align-items: center;
  }
}

.hero h1 { margin-bottom: 1.15rem; max-width: 14ch; }

.hero .lede {
  font-size: 1.15rem;
  color: var(--ink-2);
  max-width: 32rem;
}

.trust {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 550;
}
.trust li {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.trust li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  opacity: 0.7;
}

.hero-panel {
  background: var(--white);
  border: 1px solid var(--line-soft);
  border-radius: calc(var(--radius) + 4px);
  box-shadow: var(--shadow);
  padding: 1.6rem 1.5rem 1.5rem;
  position: relative;
}
.hero-panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.4rem;
  bottom: 1.4rem;
  width: 3px;
  border-radius: 2px;
  background: var(--green);
}

.hero-panel p {
  margin: 0 0 1rem;
  font-size: 0.95rem;
  color: var(--muted);
  font-weight: 550;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero-panel ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.95rem;
}

.hero-panel li {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem 1rem;
  align-items: baseline;
  padding-bottom: 0.95rem;
  border-bottom: 1px solid var(--line-soft);
  font-size: 1rem;
  color: var(--ink);
  font-weight: 550;
}
.hero-panel li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.hero-panel li span {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--muted);
  text-align: right;
}

/* ——— Sections ——— */
.section {
  padding: 5rem 0;
}
.section--tight { padding: 4rem 0; }
.section--paper { background: var(--paper-2); }
.section--white { background: var(--white); border-block: 1px solid var(--line-soft); }
.section--dark {
  background: linear-gradient(160deg, var(--green-deep) 0%, #0a2f28 55%, #12261f 100%);
  color: #d5e0db;
}
.section--dark h2 { color: #fff; }
.section--dark .lede { color: #a8b8b1; }
.section--dark .eyebrow { color: #8fc9b8; }

.section-head {
  max-width: 36rem;
  margin-bottom: 2.5rem;
}
.section-head h2 { margin-bottom: 0.85rem; }
.section-head .lede { margin-top: 0; }

/* ——— Problem cards ——— */
.cards {
  display: grid;
  gap: 1rem;
}
@media (min-width: 760px) {
  .cards--3 { grid-template-columns: repeat(3, 1fr); }
  .cards--2 { grid-template-columns: repeat(2, 1fr); }
}

.card {
  background: var(--white);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 1.5rem 1.4rem;
  box-shadow: var(--shadow-sm);
}
.card h3 {
  margin-bottom: 0.5rem;
  font-size: 1.12rem;
}
.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.55;
}

.card--quiet {
  background: transparent;
  box-shadow: none;
  border-color: var(--line);
}

/* ——— How it works ——— */
.process {
  display: grid;
  gap: 0;
  counter-reset: step;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--white);
}
@media (min-width: 800px) {
  .process { grid-template-columns: repeat(4, 1fr); }
  .process--3 { grid-template-columns: repeat(3, 1fr); }
}

.process-step {
  padding: 1.6rem 1.35rem 1.7rem;
  border-bottom: 1px solid var(--line-soft);
  position: relative;
}
@media (min-width: 800px) {
  .process-step {
    border-bottom: 0;
    border-right: 1px solid var(--line-soft);
  }
  .process-step:last-child { border-right: 0; }
}
.process-step:last-child { border-bottom: 0; }

.process-step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  font-family: var(--display);
  font-size: 1.5rem;
  color: var(--green);
  margin-bottom: 0.85rem;
  line-height: 1;
}

.process-step h3 { margin-bottom: 0.4rem; }
.process-step p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.process-note {
  margin-top: 1.25rem;
  color: var(--muted);
  font-size: 0.98rem;
  max-width: 40rem;
}

/* ——— Fit ——— */
.fit-grid {
  display: grid;
  gap: 1.25rem;
}
@media (min-width: 800px) {
  .fit-grid { grid-template-columns: 1.1fr 0.9fr; }
}

.fit-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.75rem;
}
.fit-list li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  color: var(--ink-2);
  font-size: 1rem;
}
.fit-list li::before {
  content: "";
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  margin-top: 0.55rem;
  border-radius: 50%;
  background: var(--green);
}

.fit-list--wide {
  max-width: 40rem;
  display: grid;
  gap: 0.85rem;
}
@media (min-width: 700px) {
  .fit-list--wide {
    max-width: none;
    grid-template-columns: 1fr 1fr;
    gap: 1rem 2rem;
  }
}

/* ——— Pricing ——— */
.price-layout {
  display: grid;
  gap: 1.25rem;
}
@media (min-width: 860px) {
  .price-layout {
    grid-template-columns: 1.25fr 0.85fr;
    align-items: stretch;
  }
}

.price-main {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  box-shadow: var(--shadow-sm);
}

.price-main h3 {
  font-family: var(--display);
  font-size: 1.75rem;
  font-weight: 400;
  margin-bottom: 0.35rem;
}
.price-main > p {
  margin: 0 0 1.5rem;
  color: var(--muted);
}

.price-rows {
  display: grid;
  gap: 0;
}
.price-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  padding: 0.95rem 0;
  border-top: 1px solid var(--line-soft);
  align-items: baseline;
}
.price-row:last-child { border-bottom: 1px solid var(--line-soft); }
.price-row strong {
  color: var(--ink);
  font-weight: 650;
  font-size: 1.05rem;
  text-align: right;
  white-space: nowrap;
}
.price-row span {
  color: var(--muted);
  font-size: 0.95rem;
}
.price-row em {
  display: block;
  font-style: normal;
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 500;
  margin-top: 0.15rem;
}

.price-side {
  display: grid;
  gap: 1rem;
}
.price-side .card h3 {
  font-family: var(--display);
  font-size: 1.35rem;
  font-weight: 400;
}
.price-side .card p + p { margin-top: 0.65rem; }

.fine {
  font-size: 0.88rem;
  color: var(--muted);
  margin: 1.25rem 0 0;
  line-height: 1.5;
}

/* ——— Area ——— */
.area-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}
@media (min-width: 840px) {
  .area-grid { grid-template-columns: 1fr 1fr; gap: 3rem; }
}

.map-frame {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.area-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1.35rem;
}
.area-steps li {
  display: grid;
  grid-template-columns: 2.75rem 1fr;
  gap: 0.85rem;
}
.area-steps .n {
  font-family: var(--display);
  font-size: 1.5rem;
  color: var(--green);
  line-height: 1.1;
}
.area-steps strong {
  display: block;
  color: var(--ink);
  font-size: 1.05rem;
  margin-bottom: 0.2rem;
}
.area-steps span {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.area-steps--row {
  display: grid;
  gap: 1.25rem;
  padding: 1.5rem;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
@media (min-width: 800px) {
  .area-steps--row {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
  .area-steps--row li {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
}

/* ——— Why ——— */
.why-grid {
  display: grid;
  gap: 1rem;
  margin-top: 0.5rem;
}
@media (min-width: 760px) {
  .why-grid { grid-template-columns: repeat(3, 1fr); }
}
.why-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 1.5rem 1.35rem;
}
.why-card h3 {
  color: #fff;
  font-size: 1.1rem;
  margin-bottom: 0.45rem;
}
.why-card p {
  margin: 0;
  color: #a8b8b1;
  font-size: 0.96rem;
}

/* ——— FAQ ——— */
.faq {
  max-width: 42rem;
  display: grid;
  gap: 0.5rem;
}
.faq details {
  background: var(--white);
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  padding: 0 1.2rem;
}
.faq summary {
  cursor: pointer;
  font-weight: 650;
  color: var(--ink);
  padding: 1.05rem 0;
  list-style: none;
  font-size: 1rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  float: right;
  color: var(--green);
  font-weight: 500;
  font-size: 1.25rem;
  line-height: 1;
}
.faq details[open] summary::after { content: "–"; }
.faq details p {
  margin: 0 0 1.1rem;
  color: var(--muted);
  padding-right: 1.5rem;
  line-height: 1.55;
}

/* ——— Contact ——— */
.contact-grid {
  display: grid;
  gap: 2rem;
}
@media (min-width: 880px) {
  .contact-grid {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 2.5rem;
    align-items: start;
  }
}

.contact-copy p {
  color: var(--muted);
  margin: 0 0 1.25rem;
  max-width: 28rem;
}

.contact-bits {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  display: grid;
  gap: 1rem;
}
.contact-bits li strong {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 0.2rem;
  font-weight: 650;
}
.contact-bits a {
  color: var(--ink);
  font-weight: 650;
  text-decoration: none;
  font-size: 1.05rem;
}
.contact-bits a:hover { color: var(--green); }
.contact-bits span {
  color: var(--ink);
  font-weight: 550;
}

.form-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.6rem 1.45rem;
  box-shadow: var(--shadow);
}

.form-card h3 {
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 400;
  margin-bottom: 0.35rem;
}
.form-card > p {
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.form-grid {
  display: grid;
  gap: 0.9rem;
}
@media (min-width: 560px) {
  .form-grid--2 { grid-template-columns: 1fr 1fr; }
}

label.field {
  display: grid;
  gap: 0.35rem;
  font-size: 0.82rem;
  font-weight: 650;
  color: var(--ink-2);
}
label.field .opt {
  font-weight: 500;
  color: var(--muted);
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
textarea {
  width: 100%;
  min-height: 48px;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  font-size: 1rem;
  transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}
textarea { min-height: 110px; resize: vertical; }

input:focus, textarea:focus {
  outline: none;
  background: #fff;
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(13, 92, 77, 0.15);
}

.check-row {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  font-size: 0.92rem;
  color: var(--ink-2);
  font-weight: 500;
  cursor: pointer;
}
.check-row input {
  width: 1.1rem;
  height: 1.1rem;
  margin-top: 0.15rem;
  accent-color: var(--green);
  flex-shrink: 0;
}

.form-card .btn { width: 100%; margin-top: 0.25rem; }

.form-note {
  margin: 0.85rem 0 0;
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.45;
}

/* ——— Footer ——— */
.site-footer {
  background: #0c1210;
  color: #8a9791;
  padding: 2.75rem 0 2.25rem;
  font-size: 0.92rem;
}
.footer-top {
  display: grid;
  gap: 1.5rem;
}
@media (min-width: 700px) {
  .footer-top {
    grid-template-columns: 1.3fr 1fr;
    align-items: start;
  }
}
.site-footer .logo { color: #fff; margin-bottom: 0.65rem; }
.site-footer .logo:hover { color: #fff; }
.site-footer .logo-text span { color: #7a8781; }
.site-footer p { margin: 0; max-width: 28rem; line-height: 1.55; }
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-links a {
  color: #c5d0cb;
  text-decoration: none;
  font-weight: 550;
}
.footer-links a:hover { color: #fff; }
.footer-bottom {
  margin-top: 2rem;
  padding-top: 1.35rem;
  border-top: 1px solid #1e2824;
  font-size: 0.82rem;
  color: #6a7671;
  display: grid;
  gap: 0.4rem;
}
.footer-bottom p { margin: 0; max-width: none; }