/* ============================================================
   ASTOR GROUP LIMITED — astorgroup.co
   Palette: espresso ink / kraft paper / wordmark gold
   Type:    Marcellus (display) · Figtree (body) · Spline Sans Mono (labels)
            + Noto Serif TC / Noto Sans TC for Traditional Chinese
   ============================================================ */

:root {
  --ink:    #1F1811;
  --ink-2:  #291F15;
  --ink-3:  #16100A;
  --kraft:  #EFE5D0;
  --kraft-2:#F6EEDD;
  --gold:   #C9A557;
  --gold-2: #E2C077;
  --gold-deep: #A8842F;

  --t-dark:       #EFE7D5;  /* text on ink */
  --t-dark-mute:  #B3A68C;
  --t-light:      #2C2318;  /* text on kraft */
  --t-light-mute: #6F6049;

  --line-dark:  rgba(226, 197, 133, 0.16);
  --line-light: rgba(44, 35, 24, 0.16);

  --serif: 'Marcellus', 'Noto Serif TC', Georgia, serif;
  --sans:  'Figtree', 'Noto Sans TC', system-ui, -apple-system, sans-serif;
  --mono:  'Spline Sans Mono', ui-monospace, 'Cascadia Mono', monospace;

  --ease: cubic-bezier(0.22, 0.61, 0.21, 1);
  --wrap: 1160px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--t-dark);
  background: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: inherit; text-decoration: none; }

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

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

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
}

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

[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 0.8s var(--ease),
    transform 0.8s var(--ease);
  transition-delay: var(--d, 0ms);
}

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

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

.site-head {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  transition: background 0.4s ease, border-color 0.4s ease;
  border-bottom: 1px solid transparent;
}

.site-head.is-scrolled {
  background: rgba(31, 24, 17, 0.86);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--line-dark);
}

.head-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand img { height: 22px; width: auto; }

.head-nav { display: flex; gap: clamp(1.4rem, 2.6vw, 2.4rem); }

.head-nav a {
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--t-dark-mute);
  position: relative;
  padding: 0.35rem 0;
  transition: color 0.3s ease;
}

.head-nav a::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--gold-2);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s var(--ease);
}

.head-nav a:hover { color: var(--t-dark); }
.head-nav a:hover::after { transform: scaleX(1); transform-origin: left; }

.head-right { display: flex; align-items: center; gap: 1.1rem; }

.lang {
  display: flex;
  align-items: center;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  padding: 0.2rem;
  font-family: var(--mono);
  font-size: 0.78rem;
}

.lang a {
  padding: 0.22rem 0.72rem;
  border-radius: 999px;
  color: var(--t-dark-mute);
  transition: color 0.25s ease, background 0.25s ease;
}

.lang a:hover { color: var(--gold-2); }

.lang a.on {
  background: var(--gold);
  color: var(--ink);
  font-weight: 500;
}

/* burger */

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  background: none;
  border: 0;
  cursor: pointer;
  position: relative;
  z-index: 70;
}

.nav-toggle span {
  position: absolute;
  left: 8px; right: 8px;
  height: 1.5px;
  background: var(--t-dark);
  transition: transform 0.35s var(--ease), top 0.35s var(--ease);
}

.nav-toggle span:nth-child(1) { top: 16px; }
.nav-toggle span:nth-child(2) { top: 23px; }

.menu-open .nav-toggle span:nth-child(1) { top: 19.5px; transform: rotate(45deg); }
.menu-open .nav-toggle span:nth-child(2) { top: 19.5px; transform: rotate(-45deg); }

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 60;
  background: var(--ink);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 clamp(2rem, 8vw, 4rem);
  gap: 0.4rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.menu-open .mobile-menu { opacity: 1; visibility: visible; }

.mobile-menu a {
  font-family: var(--serif);
  font-size: clamp(1.9rem, 7vw, 2.6rem);
  letter-spacing: 0.08em;
  padding: 0.55rem 0;
  color: var(--t-dark);
  border-bottom: 1px solid var(--line-dark);
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.45s var(--ease), transform 0.45s var(--ease), color 0.3s ease;
}

.menu-open .mobile-menu a { opacity: 1; transform: none; }
.mobile-menu a:hover { color: var(--gold-2); }
.menu-open .mobile-menu a:nth-child(1) { transition-delay: 0.08s; }
.menu-open .mobile-menu a:nth-child(2) { transition-delay: 0.14s; }
.menu-open .mobile-menu a:nth-child(3) { transition-delay: 0.20s; }
.menu-open .mobile-menu a:nth-child(4) { transition-delay: 0.26s; }

.mobile-menu .menu-lang {
  margin-top: 2rem;
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--t-dark-mute);
  opacity: 0;
  transition: opacity 0.45s ease 0.32s;
}

.menu-open .mobile-menu .menu-lang { opacity: 1; }
.mobile-menu .menu-lang a {
  font-family: var(--mono);
  font-size: 0.9rem;
  border: 0;
  padding: 0;
  display: inline;
  letter-spacing: 0.06em;
  color: var(--gold-2);
  opacity: 1;
  transform: none;
}

body.menu-open { overflow: hidden; }

/* ---------- shared section pieces ---------- */

.eyebrow {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.34em;
  color: var(--gold);
}

.sec { padding: clamp(4.5rem, 9vw, 7.5rem) 0; }

.sec h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.75rem, 3.4vw, 2.55rem);
  line-height: 1.2;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 0.9rem 0 1.4rem;
}

.sec-lead {
  max-width: 58ch;
  font-size: clamp(1.02rem, 1.5vw, 1.14rem);
  line-height: 1.75;
}

.sec-light {
  background: var(--kraft);
  color: var(--t-light);
}

.sec-light .sec-lead { color: #473A28; }
.sec-light .eyebrow { color: var(--gold-deep); }

.sec-dark { background: var(--ink); }
.sec-dark .sec-lead { color: #CFC3AA; }

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

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 82% 8%, #2E2314 0%, var(--ink) 55%);
  padding: 7.5rem 0 5.5rem;
}

.hero-waves {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  -webkit-mask-image: radial-gradient(95% 85% at 76% 42%, #000 0%, rgba(0,0,0,0.5) 48%, transparent 80%);
  mask-image: radial-gradient(95% 85% at 76% 42%, #000 0%, rgba(0,0,0,0.5) 48%, transparent 80%);
}

.wl-a { animation: drift 44s linear infinite; }
.wl-b { animation: drift 64s linear infinite reverse; }

@keyframes drift {
  to { transform: translateX(-120px); }
}

.hero-inner { position: relative; z-index: 1; width: 100%; }

.hero-lockup { margin: 1.6rem 0 0; }

.hero-lockup img {
  width: min(520px, 78vw);
  height: auto;
}

.lockup-sub {
  display: block;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(0.95rem, 2.4vw, 1.35rem);
  letter-spacing: 0.62em;
  text-indent: 0.18em;
  color: var(--t-dark-mute);
  margin-top: 1.05rem;
}

.hero-lead {
  max-width: 46ch;
  margin-top: 2rem;
  font-size: clamp(1.08rem, 1.8vw, 1.3rem);
  line-height: 1.7;
  color: #D8CCB2;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2.4rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--mono);
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.95rem 1.7rem;
  border-radius: 3px;
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease, transform 0.3s var(--ease);
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-solid { background: var(--gold); color: var(--ink); }
.btn-solid:hover { background: var(--gold-2); }

.btn-ghost {
  border: 1px solid var(--line-dark);
  color: var(--t-dark);
}

.btn-ghost:hover { border-color: var(--gold); color: var(--gold-2); }

.hero-scroll {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.55rem;
  z-index: 1;
}

.hero-scroll .cue-label {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--t-dark-mute);
}

.hero-scroll .cue-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(var(--gold-2), transparent);
  animation: cue 2.6s var(--ease) infinite;
}

@keyframes cue {
  0%   { transform: translateY(-8px); opacity: 0; }
  35%  { opacity: 1; }
  100% { transform: translateY(12px); opacity: 0; }
}

/* ---------- products ---------- */

.prod-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 3rem;
}

.card {
  background: var(--kraft-2);
  border: 1px solid var(--line-light);
  border-radius: 6px;
  padding: 1.6rem 1.4rem 1.5rem;
  transition: transform 0.35s var(--ease), border-color 0.35s ease, box-shadow 0.35s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(168, 132, 47, 0.55);
  box-shadow: 0 14px 30px -18px rgba(44, 35, 24, 0.35);
}

.card svg {
  width: 46px;
  height: 46px;
  color: #3B2F1F;
  margin-bottom: 1.05rem;
  transition: transform 0.35s var(--ease);
}

.card:hover svg { transform: translateY(-2px); }

.card .au  { stroke: var(--gold-deep); }
.card .auf { fill: var(--gold-deep); }

.card h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.14rem;
  letter-spacing: 0.05em;
  line-height: 1.35;
}

.card .alt {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--t-light-mute);
}

/* ---------- markets / network ---------- */

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

.net-wrap { margin-top: 2.2rem; }

.net { width: 100%; height: auto; }

.net .region {
  font-family: var(--mono);
  font-size: 17px;
  letter-spacing: 0.32em;
  fill: rgba(201, 165, 87, 0.72);
}

.net .hub-dot   { fill: var(--gold-2); }
.net .hub-ring  {
  fill: none;
  stroke: var(--gold-2);
  stroke-width: 1;
  opacity: 0.55;
  transform-origin: center;
  transform-box: fill-box;
  animation: hubpulse 3.6s ease-out infinite;
}

@keyframes hubpulse {
  0%   { transform: scale(0.72); opacity: 0.65; }
  70%  { transform: scale(1.5);  opacity: 0; }
  100% { transform: scale(1.5);  opacity: 0; }
}

.net .hub-label {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 23px;
  fill: #F2E9D4;
}

.net .arc {
  fill: none;
  stroke: var(--gold);
  stroke-opacity: 0.42;
  stroke-width: 1.8;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transition: stroke-dashoffset 1.15s cubic-bezier(0.4, 0, 0.2, 1) calc(var(--i) * 95ms);
}

.net .dot {
  fill: var(--ink);
  stroke: var(--gold);
  stroke-width: 1.6;
  opacity: 0;
  transform: scale(0.4);
  transform-origin: center;
  transform-box: fill-box;
  transition:
    opacity 0.45s ease calc(0.55s + var(--i) * 95ms),
    transform 0.55s cubic-bezier(0.34, 1.56, 0.64, 1) calc(0.55s + var(--i) * 95ms);
}

.net .lbl {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 21px;
  fill: #E6DBC1;
  opacity: 0;
  transition: opacity 0.5s ease calc(0.68s + var(--i) * 95ms);
}

.net.is-in .arc { stroke-dashoffset: 0; }
.net.is-in .dot { opacity: 1; transform: scale(1); }
.net.is-in .lbl { opacity: 1; }

/* mobile fallback list */

.net-list { display: none; }

/* ---------- services ---------- */

.svc-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.svc-list { list-style: none; margin-top: 0.5rem; }

.svc-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.35rem 0.2rem;
  border-top: 1px solid var(--line-light);
}

.svc-list li:last-child { border-bottom: 1px solid var(--line-light); }

.svc-name {
  font-family: var(--serif);
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  letter-spacing: 0.06em;
  display: flex;
  align-items: baseline;
  gap: 1rem;
}

.svc-name::before {
  content: '';
  width: 7px;
  height: 7px;
  background: var(--gold-deep);
  transform: rotate(45deg) translateY(-2px);
  flex: none;
}

.svc-alt {
  font-size: 0.92rem;
  letter-spacing: 0.1em;
  color: var(--t-light-mute);
  white-space: nowrap;
}

/* ---------- contact ---------- */

.sec-contact {
  background:
    radial-gradient(110% 100% at 20% 110%, #2B2113 0%, var(--ink) 60%);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.8rem;
  align-items: start;
}

.mail {
  display: inline-block;
  margin-top: 1.2rem;
  font-family: var(--serif);
  font-size: clamp(1.25rem, 3vw, 1.9rem);
  letter-spacing: 0.04em;
  color: var(--gold-2);
  border-bottom: 1px solid rgba(226, 192, 119, 0.35);
  padding-bottom: 0.3rem;
  transition: border-color 0.3s ease, color 0.3s ease;
}

.mail:hover { color: #F2D68F; border-bottom-color: var(--gold-2); }

.addr {
  font-style: normal;
  font-family: var(--mono);
  font-size: 0.95rem;
  line-height: 2;
  color: #CFC3AA;
  border-left: 2px solid var(--gold);
  padding-left: 1.6rem;
}

.addr .addr-label {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--t-dark-mute);
  margin-bottom: 0.7rem;
}

.addr strong { color: var(--t-dark); font-weight: 500; }

.contact-info .addr { margin-top: 2.4rem; }

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

.enquiry { color-scheme: dark; }

.form-label {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.34em;
  color: var(--gold);
  margin-bottom: 1.6rem;
}

.f-row { display: grid; grid-template-columns: 1fr; gap: 0 1rem; }

.field {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-bottom: 1.15rem;
}

.field label {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--t-dark-mute);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--line-dark);
  border-radius: 3px;
  padding: 0.82rem 0.95rem;
  color: var(--t-dark);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.4;
  transition: border-color 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
}

.field input::placeholder,
.field textarea::placeholder { color: rgba(179, 166, 140, 0.55); }

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--gold);
  background: rgba(255, 255, 255, 0.05);
  box-shadow: 0 0 0 3px rgba(201, 165, 87, 0.16);
}

.field input:-webkit-autofill {
  -webkit-box-shadow: 0 0 0 1000px #2A2016 inset;
  -webkit-text-fill-color: var(--t-dark);
}

.field select {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 2.5rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%23C9A557' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.95rem center;
  cursor: pointer;
}

.field textarea { resize: vertical; min-height: 130px; }

.enquiry .btn { border: 0; cursor: pointer; margin-top: 0.3rem; }

.form-note {
  font-family: var(--mono);
  font-size: 0.72rem;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--t-dark-mute);
  margin-top: 1rem;
  transition: color 0.3s ease;
}

.form-note.is-live { color: var(--gold-2); }

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

.site-foot {
  background: var(--ink-3);
  border-top: 1px solid var(--line-dark);
  padding: 2.6rem 0;
}

.foot-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
}

.foot-inner img { height: 16px; width: auto; opacity: 0.9; }

.foot-inner p {
  font-size: 0.85rem;
  color: var(--t-dark-mute);
  letter-spacing: 0.03em;
}

.foot-inner a { color: #CBBFA5; transition: color 0.25s ease; }
.foot-inner a:hover { color: var(--gold-2); }

/* ---------- 404 ---------- */

.page-404 {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 1.4rem;
  padding: 2rem;
}

.page-404 img { width: min(320px, 70vw); }

.page-404 h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.5rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--t-dark-mute);
}

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

@media (min-width: 560px) {
  .f-row { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 760px) {
  .prod-grid { grid-template-columns: repeat(4, 1fr); gap: 1.1rem; }
  .contact-grid { grid-template-columns: 1fr 1.25fr; gap: 4rem; }
}

@media (min-width: 900px) {
  .svc-grid { grid-template-columns: 1fr 1.1fr; gap: 4rem; }
  .svc-intro { position: sticky; top: 110px; align-self: start; }
}

@media (min-width: 980px) {
  .mkts-grid { grid-template-columns: 0.95fr 1.3fr; gap: 3.5rem; align-items: center; }
  .net-wrap { margin-top: 0; }
}

@media (max-width: 860px) {
  .head-nav { display: none; }
  .nav-toggle { display: block; }
}

@media (min-width: 861px) {
  .mobile-menu { display: none; }
}

@media (max-width: 640px) {
  .net { display: none; }

  .net-list {
    display: grid;
    gap: 1.8rem;
    margin-top: 0.4rem;
  }

  .net-region {
    font-family: var(--mono);
    font-size: 0.72rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.32em;
    color: rgba(201, 165, 87, 0.85);
    margin-bottom: 0.85rem;
  }

  .net-group ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
  }

  .net-group li {
    font-size: 0.92rem;
    color: #E6DBC1;
    border: 1px solid var(--line-dark);
    border-radius: 999px;
    padding: 0.42rem 0.95rem;
  }

  .net-group li.hub-chip {
    border-color: var(--gold);
    color: var(--gold-2);
  }

  .hero-scroll { display: none; }
}

/* section anchors clear the fixed header */
section[id] { scroll-margin-top: 70px; }

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

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

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

  .wl-a, .wl-b, .hero-scroll .cue-line, .net .hub-ring { animation: none; }

  .net .arc { stroke-dashoffset: 0; transition: none; }
  .net .dot { opacity: 1; transform: none; transition: none; }
  .net .lbl { opacity: 1; transition: none; }

  .card, .card svg, .btn, .mobile-menu, .mobile-menu a { transition: none; }
}