/* Karvan Partners — Iran ⇄ Europe trade & investment
   Palette derived from Persian tilework: lapis, turquoise, brass, paper. */

:root {
  --lapis: #0B1A2E;
  --lapis-2: #12263F;
  --lapis-3: #1B3454;
  --turquoise: #34A5A0;
  --turquoise-lt: #66C7C1;
  --brass: #C89B3C;
  --brass-lt: #E2C078;
  --paper: #F6F3EC;
  --paper-2: #EBE5D8;
  --ink: #10161F;
  --muted: #5B6673;
  --muted-dk: #9BAAB9;
  --line: rgba(11, 26, 46, 0.14);
  --line-dk: rgba(246, 243, 236, 0.16);

  --display: "Spectral", Georgia, serif;
  --body: "Archivo", system-ui, -apple-system, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --fa: "Vazirmatn", var(--body);

  --wrap: 1180px;
  --gut: clamp(20px, 5vw, 56px);
  --r: 3px;
}

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

html { scroll-behavior: smooth; }

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

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

a { color: inherit; }

::selection { background: var(--brass-lt); color: var(--lapis); }

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

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

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0;
}

h1 { font-size: clamp(2.6rem, 6vw, 4.4rem); }
h2 { font-size: clamp(1.9rem, 3.6vw, 2.9rem); }
h3 { font-size: 1.3rem; letter-spacing: -0.005em; }

p { margin: 0 0 1em; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--turquoise);
  margin: 0 0 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--brass);
  flex: none;
}

.lead {
  font-size: clamp(1.05rem, 1.6vw, 1.24rem);
  color: var(--muted);
  max-width: 62ch;
}

.fa {
  font-family: var(--fa);
  direction: rtl;
  unicode-bidi: isolate;
}

/* ---------- layout ---------- */

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gut);
}

section { padding-block: clamp(64px, 9vw, 118px); }

.band-dark {
  background: var(--lapis);
  color: var(--paper);
}

.band-dark .lead,
.band-dark .muted { color: var(--muted-dk); }

.band-tint { background: var(--paper-2); }

.rule {
  height: 1px;
  background: var(--line);
  border: 0;
  margin: 0;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.band-dark .grid-3 { background: var(--line-dk); border-color: var(--line-dk); }

/* ---------- header ---------- */

.masthead {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(11, 26, 46, 0.96);
  backdrop-filter: blur(8px);
  color: var(--paper);
  border-bottom: 1px solid var(--line-dk);
}

.masthead__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.brand__mark { width: 30px; height: 30px; flex: none; }

.brand__name {
  font-family: var(--display);
  font-size: 1.16rem;
  letter-spacing: 0.02em;
}

.brand__name span {
  display: block;
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--brass-lt);
  margin-top: 2px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav a {
  text-decoration: none;
  font-size: 0.93rem;
  color: var(--paper);
  opacity: 0.78;
  padding: 6px 0;
  border-bottom: 1px solid transparent;
  transition: opacity 0.2s, border-color 0.2s;
}

.nav a:hover { opacity: 1; }
.nav a[aria-current="page"] { opacity: 1; border-bottom-color: var(--brass); }

.nav__cta {
  border: 1px solid var(--brass);
  padding: 9px 18px !important;
  opacity: 1 !important;
  border-radius: var(--r);
  color: var(--brass-lt) !important;
}

.nav__cta:hover { background: var(--brass); color: var(--lapis) !important; }

.burger {
  display: none;
  background: none;
  border: 1px solid var(--line-dk);
  border-radius: var(--r);
  color: var(--paper);
  padding: 8px 12px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  cursor: pointer;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--body);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  padding: 14px 26px;
  border-radius: var(--r);
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.2s;
}

.btn:hover { transform: translateY(-1px); }

.btn--primary { background: var(--brass); color: var(--lapis); }
.btn--primary:hover { background: var(--brass-lt); }

.btn--ghost {
  border-color: currentColor;
  color: var(--paper);
  opacity: 0.9;
}

.btn--ghost:hover { background: rgba(246, 243, 236, 0.08); opacity: 1; }

.btn--ink { border-color: var(--lapis); color: var(--lapis); }
.btn--ink:hover { background: var(--lapis); color: var(--paper); }

.btn-row { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }

/* ---------- hero ---------- */

.hero {
  position: relative;
  background: var(--lapis);
  color: var(--paper);
  overflow: hidden;
  padding-block: clamp(56px, 8vw, 96px) clamp(48px, 7vw, 88px);
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120' viewBox='0 0 120 120'%3E%3Cg fill='none' stroke='%23C89B3C' stroke-width='1' opacity='.16'%3E%3Cpath d='M60 0 120 60 60 120 0 60Z'/%3E%3Cpath d='M60 30 90 60 60 90 30 60Z'/%3E%3Cpath d='M0 0h120v120H0z'/%3E%3C/g%3E%3C/svg%3E");
  background-size: 120px 120px;
  opacity: 0.5;
  pointer-events: none;
}

.hero > * { position: relative; z-index: 1; }

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}

.hero h1 { margin-bottom: 20px; }
.hero h1 em { font-style: italic; color: var(--brass-lt); }

.hero__fa {
  font-family: var(--fa);
  direction: rtl;
  font-size: 1.05rem;
  color: var(--turquoise-lt);
  margin-bottom: 26px;
  padding-right: 14px;
  border-right: 2px solid var(--brass);
}

.hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin-top: 46px;
  border-top: 1px solid var(--line-dk);
}

.hero__stat {
  padding: 20px 26px 0 0;
  margin-right: 26px;
  border-right: 1px solid var(--line-dk);
}

.hero__stat:last-child { border-right: 0; }

.hero__stat b {
  display: block;
  font-family: var(--display);
  font-size: 1.85rem;
  font-weight: 500;
  color: var(--brass-lt);
}

.hero__stat span {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted-dk);
}

/* corridor map */

.corridor { width: 100%; height: auto; }
.corridor .arc {
  fill: none;
  stroke: var(--turquoise);
  stroke-width: 1.2;
  opacity: 0.55;
  stroke-dasharray: 4 6;
  animation: drift 9s linear infinite;
}
.corridor .arc--hot { stroke: var(--brass); opacity: 0.85; stroke-dasharray: 3 7; }
.corridor .node { fill: var(--paper); }
.corridor .node--hub { fill: var(--brass); }
.corridor .halo {
  fill: none;
  stroke: var(--brass);
  opacity: 0.5;
  transform-origin: center;
  animation: pulse 3.4s ease-out infinite;
}
.corridor .lbl {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.1em;
  fill: var(--muted-dk);
  text-transform: uppercase;
}
.corridor .lbl--hub { fill: var(--brass-lt); }
.corridor .frame { fill: none; stroke: rgba(246,243,236,.14); }

@keyframes drift { to { stroke-dashoffset: -200; } }
@keyframes pulse {
  0% { r: 7; opacity: 0.55; }
  70% { r: 22; opacity: 0; }
  100% { r: 22; opacity: 0; }
}

/* ---------- cards ---------- */

.card {
  background: var(--paper);
  padding: 34px 30px;
}

.band-dark .card { background: var(--lapis); }

.card__no {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--brass);
  display: block;
  margin-bottom: 14px;
}

.card h3 { margin-bottom: 10px; }

.card p { color: var(--muted); font-size: 0.96rem; margin: 0; }
.band-dark .card p { color: var(--muted-dk); }

/* sector list */

.sectors { border-top: 1px solid var(--line); }

.sector {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr) minmax(0, 1.25fr);
  gap: 22px;
  align-items: baseline;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
  transition: background 0.25s, padding-left 0.25s;
}

.sector:hover { background: var(--paper-2); padding-left: 12px; }

.band-dark .sector { border-color: var(--line-dk); }
.band-dark .sector:hover { background: var(--lapis-2); }

.sector__code {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--brass);
}

.sector h3 { font-size: 1.42rem; }

.sector p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.band-dark .sector p { color: var(--muted-dk); }

.sector__tags {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid var(--line);
  padding: 4px 9px;
  border-radius: 100px;
  color: var(--muted);
}

.band-dark .tag { border-color: var(--line-dk); color: var(--muted-dk); }

/* markets */

.markets {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1px;
  background: var(--line-dk);
  border: 1px solid var(--line-dk);
  margin-top: 44px;
}

.market {
  background: var(--lapis);
  padding: 26px 24px;
}

.market b {
  font-family: var(--display);
  font-size: 1.28rem;
  font-weight: 500;
  display: block;
  margin-bottom: 6px;
}

.market span {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--turquoise-lt);
}

.market p { margin: 12px 0 0; font-size: 0.9rem; color: var(--muted-dk); }

/* steps */

.steps { counter-reset: step; margin-top: 40px; }

.step {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 22px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}

.step__n {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--brass);
  padding-top: 5px;
}

.step h3 { margin-bottom: 8px; }
.step p { color: var(--muted); margin: 0; }

/* quote / pledge */

.pledge {
  border-left: 2px solid var(--brass);
  padding-left: clamp(20px, 3vw, 34px);
  font-family: var(--display);
  font-size: clamp(1.35rem, 2.6vw, 1.95rem);
  line-height: 1.34;
  max-width: 46ch;
}

/* cta strip */

.cta-strip {
  background: var(--lapis-2);
  color: var(--paper);
  padding-block: clamp(52px, 7vw, 84px);
}

.cta-strip__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  align-items: center;
  justify-content: space-between;
}

.cta-strip h2 { max-width: 20ch; }

/* ---------- form ---------- */

.form-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: clamp(32px, 5vw, 70px);
  align-items: start;
}

.form {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: clamp(24px, 3.4vw, 40px);
}

.field { margin-bottom: 20px; }

.field label {
  display: block;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}

.field label .opt { color: var(--brass); text-transform: none; letter-spacing: 0.04em; }

.field input,
.field select,
.field textarea {
  width: 100%;
  font-family: var(--body);
  font-size: 1rem;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 13px 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.field textarea { min-height: 118px; resize: vertical; }

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--turquoise);
  box-shadow: 0 0 0 3px rgba(52, 165, 160, 0.16);
}

.field input[type="file"] { padding: 10px; background: var(--paper-2); cursor: pointer; }

.field--pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.hint { font-size: 0.82rem; color: var(--muted); margin: 7px 0 0; }

.err {
  display: none;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: #B3261E;
  margin-top: 7px;
}

.field.is-invalid input,
.field.is-invalid select { border-color: #B3261E; }

.field.is-invalid .err { display: block; }

.form__note {
  font-size: 0.84rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 16px;
  margin: 24px 0 0;
}

.form-status {
  display: none;
  border: 1px solid var(--turquoise);
  background: rgba(52, 165, 160, 0.1);
  padding: 18px 20px;
  margin-bottom: 24px;
  border-radius: var(--r);
}

.form-status.is-on { display: block; }
.form-status h3 { font-size: 1.1rem; margin-bottom: 6px; }
.form-status p { margin: 0; font-size: 0.93rem; color: var(--muted); }

.contact-list { list-style: none; margin: 30px 0 0; padding: 0; }

.contact-list li {
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.contact-list .clabel {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}

.contact-list a {
  font-family: var(--display);
  font-size: 1.15rem;
  text-decoration: none;
  border-bottom: 1px solid var(--brass);
}

.contact-list a:hover { color: var(--turquoise); }

/* faq */

.faq { border-top: 1px solid var(--line); margin-top: 40px; }

details {
  border-bottom: 1px solid var(--line);
  padding: 20px 0;
}

summary {
  cursor: pointer;
  font-family: var(--display);
  font-size: 1.14rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
}

summary::-webkit-details-marker { display: none; }

summary::after {
  content: "+";
  font-family: var(--mono);
  color: var(--brass);
  font-size: 1.1rem;
  flex: none;
}

details[open] summary::after { content: "–"; }

details p { margin: 14px 0 0; color: var(--muted); max-width: 68ch; }

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

.footer {
  background: var(--lapis);
  color: var(--muted-dk);
  padding-block: 56px 30px;
  font-size: 0.9rem;
}

.footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) repeat(2, minmax(0, 1fr));
  gap: 34px;
  padding-bottom: 34px;
  border-bottom: 1px solid var(--line-dk);
}

.footer h4 {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brass-lt);
  margin-bottom: 14px;
  font-weight: 400;
}

.footer ul { list-style: none; margin: 0; padding: 0; }
.footer li { margin-bottom: 9px; }
.footer a { text-decoration: none; }
.footer a:hover { color: var(--paper); }

.footer__base {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: space-between;
  padding-top: 22px;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
}

/* ---------- page header ---------- */

.page-head {
  background: var(--lapis);
  color: var(--paper);
  padding-block: clamp(56px, 7vw, 92px);
  border-bottom: 1px solid var(--line-dk);
}

.page-head h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); max-width: 18ch; }
.page-head .lead { margin-top: 20px; color: var(--muted-dk); }

/* ---------- reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-in { opacity: 1; transform: none; }

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

@media (max-width: 900px) {
  .hero__grid,
  .split,
  .form-shell,
  .footer__grid { grid-template-columns: 1fr; }

  .sector { grid-template-columns: 54px 1fr; }
  .sector p { grid-column: 2; }

  .burger { display: block; }

  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--lapis-2);
    border-bottom: 1px solid var(--line-dk);
    padding: 8px var(--gut) 20px;
    display: none;
  }

  .nav.is-open { display: flex; }
  .nav a { padding: 13px 0; border-bottom: 1px solid var(--line-dk); }
  .nav__cta { margin-top: 14px; text-align: center; justify-content: center; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .field--pair { grid-template-columns: 1fr; }
  .hero__stat { border-right: 0; padding-right: 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}