/* ==========================================================
   Eka Teknologi Solusi
   Warna utama mengikuti hijau dokumen resmi ETS (#0F6E56).
   Aksen kuning dipakai hanya untuk "lubang" label kabel
   (motif identitas) dan fokus keyboard.
   ========================================================== */

:root {
  --green: #0F6E56;
  --green-strong: #0A5442;
  --ink: #14201C;
  --muted: #475751;
  --paper: #FFFFFF;
  --surface: #EEF5F1;
  --line: #CFE0D8;
  --accent: #E3A12F;

  --btn-bg: var(--green);
  --btn-bg-hover: var(--green-strong);
  --btn-fg: #FFFFFF;
  --link: var(--green);
  --node-bg: #FFFFFF;
  --node-key-bg: var(--green);
  --node-key-fg: #FFFFFF;
  --cable: var(--green);

  --font: "Archivo", system-ui, -apple-system, "Segoe UI", sans-serif;
  --wrap: 1120px;
  --gutter: clamp(16px, 4vw, 32px);
  --radius: 6px;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --green: #3FBF95;
    --green-strong: #5FD3AB;
    --ink: #E4EEEA;
    --muted: #A6B8B1;
    --paper: #0F1916;
    --surface: #16241F;
    --line: #2A4139;
    --btn-bg: #3FBF95;
    --btn-bg-hover: #5FD3AB;
    --btn-fg: #0F1916;
    --link: #5FD3AB;
    --node-bg: #16241F;
    --node-key-bg: #3FBF95;
    --node-key-fg: #0F1916;
    --cable: #3FBF95;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --green: #3FBF95;
  --green-strong: #5FD3AB;
  --ink: #E4EEEA;
  --muted: #A6B8B1;
  --paper: #0F1916;
  --surface: #16241F;
  --line: #2A4139;
  --btn-bg: #3FBF95;
  --btn-bg-hover: #5FD3AB;
  --btn-fg: #0F1916;
  --link: #5FD3AB;
  --node-bg: #16241F;
  --node-key-bg: #3FBF95;
  --node-key-fg: #0F1916;
  --cable: #3FBF95;
  color-scheme: dark;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { margin: 0; line-height: 1.15; }
p { margin: 0; }
a { color: var(--link); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

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

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip {
  position: absolute; left: 12px; top: -60px; z-index: 100;
  background: var(--btn-bg); color: var(--btn-fg);
  padding: 10px 16px; border-radius: var(--radius); font-weight: 600;
}
.skip:focus { top: 12px; }

/* ---------- Tombol ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px; padding: 0 22px;
  font: inherit; font-weight: 650; font-size: 1rem;
  border-radius: var(--radius); border: 2px solid transparent;
  text-decoration: none; cursor: pointer;
  transition: background-color .15s ease, border-color .15s ease;
}
.btn-primary { background: var(--btn-bg); color: var(--btn-fg); }
.btn-primary:hover { background: var(--btn-bg-hover); }
.btn-ghost { color: var(--ink); border-color: var(--line); background: transparent; }
.btn-ghost:hover { border-color: var(--green); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 68px; gap: 16px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--ink); text-decoration: none;
}
.brand-logo { display: block; width: auto; height: 40px; flex: none; }
.brand-name { font-weight: 700; font-stretch: 105%; font-size: 1.02rem; }

.site-nav { display: flex; align-items: center; gap: 28px; }
.site-nav ul { display: flex; gap: 24px; list-style: none; margin: 0; padding: 0; }
.site-nav ul a {
  color: var(--ink); text-decoration: none; font-weight: 550;
  padding: 10px 0; display: inline-block;
}
.site-nav ul a:hover { color: var(--green); }

.nav-tools { display: flex; align-items: center; gap: 10px; }

.lang-switch {
  display: inline-flex; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
}
.lang-switch button {
  font: inherit; font-weight: 650; font-size: .85rem;
  min-width: 44px; min-height: 40px; padding: 0 10px;
  background: transparent; color: var(--muted); border: 0; cursor: pointer;
}
.lang-switch button[aria-pressed="true"] { background: var(--surface); color: var(--ink); }

.theme-toggle {
  display: inline-grid; place-items: center;
  width: 44px; height: 42px; border-radius: var(--radius);
  background: transparent; color: var(--ink);
  border: 1px solid var(--line); cursor: pointer;
}
.theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: block; }
  :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: none; }
}

.nav-toggle {
  display: none;
  width: 44px; height: 44px; border-radius: var(--radius);
  background: transparent; border: 1px solid var(--line); cursor: pointer;
  position: relative;
}
.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
  position: absolute; left: 11px; width: 20px; height: 2px;
  background: var(--ink); content: ""; transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle-bar { top: 21px; }
.nav-toggle-bar::before { left: 0; top: -6px; }
.nav-toggle-bar::after { left: 0; top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { padding: clamp(40px, 7vw, 88px) 0 clamp(48px, 7vw, 96px); }
.hero-grid {
  display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(32px, 5vw, 56px);
  align-items: center;
}
.hero h1 {
  font-size: clamp(2rem, 1.2rem + 3vw, 3.25rem);
  font-weight: 750; font-stretch: 112%;
  letter-spacing: -0.015em;
  max-width: 17ch;
}
.lead {
  margin-top: 20px; max-width: 46ch;
  font-size: 1.15rem; color: var(--muted);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }

/* Diagram topologi: elemen utama halaman */
.topology { margin: 0; }
.topology svg { width: 100%; height: auto; display: block; overflow: visible; }
.topology .topo-narrow { display: none; max-width: 400px; }
.topology figcaption { margin-top: 14px; font-size: .92rem; color: var(--muted); }

.cable { stroke: var(--cable); stroke-width: 2.5; stroke-linecap: square; }
.node rect { fill: var(--node-bg); stroke: var(--green); stroke-width: 1.5; }
.node .hole { fill: var(--accent); }
.node text {
  font-family: var(--font); font-size: 14px; font-weight: 600;
  fill: var(--ink); text-anchor: middle;
}
.node-key rect { fill: var(--node-key-bg); stroke: var(--node-key-bg); }
.node-key text { fill: var(--node-key-fg); }
.node-muted rect { stroke-dasharray: 4 4; }

/* Satu-satunya animasi otomatis: kabel "ditarik" saat halaman dimuat */
@media (prefers-reduced-motion: no-preference) {
  .cable {
    stroke-dasharray: 1; stroke-dashoffset: 1;
    animation: pull .7s ease-out forwards;
  }
  .cable:nth-child(2) { animation-delay: .25s; }
  .cable:nth-child(3) { animation-delay: .5s; }
  .cable:nth-child(n+4) { animation-delay: .65s; animation-duration: .9s; }
  @keyframes pull { to { stroke-dashoffset: 0; } }
}

/* ---------- Section umum ---------- */
.section { padding: clamp(56px, 8vw, 104px) 0; }
.section-head { max-width: 640px; margin-bottom: clamp(32px, 5vw, 52px); }
.section-head h2, .contact-info h2 {
  font-size: clamp(1.7rem, 1.2rem + 1.8vw, 2.4rem);
  font-weight: 750; font-stretch: 110%; letter-spacing: -0.01em;
}
.section-head p { margin-top: 14px; color: var(--muted); font-size: 1.1rem; }

/* ---------- Layanan ---------- */
.services { background: var(--surface); }

.svc-primary {
  display: grid; grid-template-columns: 1fr 1fr; gap: clamp(24px, 4vw, 48px);
}
.svc-major {
  background: var(--paper);
  border-top: 4px solid var(--green);
  border-radius: 0 0 var(--radius) var(--radius);
  padding: clamp(24px, 3vw, 36px);
}
.svc-major p { margin-top: 16px; color: var(--muted); max-width: 52ch; }

/* Label kabel: motif identitas */
.tag {
  display: inline-flex; align-items: center; gap: 12px;
  font-size: 1.35rem; font-weight: 750; font-stretch: 108%;
}
.tag::before {
  content: ""; width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent); flex: none;
  box-shadow: 0 0 0 4px var(--surface);
}

.spec {
  list-style: none; margin: 22px 0 0; padding: 0;
  border-top: 1px solid var(--line);
}
.spec li {
  padding: 10px 0; border-bottom: 1px solid var(--line);
  font-weight: 550;
}

.svc-minor {
  display: grid; grid-template-columns: repeat(4, 1fr);
  margin-top: clamp(36px, 5vw, 56px);
  border-top: 1px solid var(--line);
}
.svc-minor article {
  padding: 24px 24px 0 0;
}
.svc-minor article + article { padding-left: 24px; border-left: 1px solid var(--line); }
.svc-minor h3 { font-size: 1.1rem; font-weight: 700; font-stretch: 105%; }
.svc-minor p { margin-top: 8px; color: var(--muted); font-size: .98rem; }

/* ---------- Cara kerja ---------- */
.steps {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px;
  counter-reset: step;
  position: relative;
}
.steps::before {
  content: ""; position: absolute; left: 22px; right: 22px; top: 21px;
  height: 2px; background: var(--line);
}
.steps li { counter-increment: step; position: relative; }
.steps li::before {
  content: counter(step);
  display: grid; place-items: center;
  width: 44px; height: 44px; border-radius: var(--radius);
  background: var(--paper); border: 2px solid var(--green); color: var(--green);
  font-weight: 800; font-stretch: 115%; position: relative;
}
.steps h3 { margin-top: 18px; font-size: 1.15rem; font-weight: 700; }
.steps p { margin-top: 8px; color: var(--muted); }

/* ---------- Partner ---------- */
.partner { border-top: 1px solid var(--line); }
.partner-grid {
  display: grid; grid-template-columns: 1.2fr 1fr; gap: clamp(32px, 6vw, 80px);
  align-items: center;
}
.partner-copy h2 {
  font-size: clamp(1.7rem, 1.2rem + 1.8vw, 2.4rem);
  font-weight: 750; font-stretch: 110%; letter-spacing: -0.01em;
}
.partner-copy p { margin-top: 14px; color: var(--muted); font-size: 1.1rem; max-width: 54ch; }
.partner-link { display: inline-block; margin-top: 20px; padding: 10px 0; font-weight: 600; }

/* Mode gelap memakai versi logo dengan teks terang (partner-tridatu-dark.png) */
.partner-logo {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(28px, 4vw, 48px);
  display: grid; justify-items: center; gap: 16px;
}
.partner-logo img { width: 100%; max-width: 280px; height: auto; display: block; }
.partner-logo .logo-dark { display: none; }
:root[data-theme="dark"] .partner-logo .logo-light { display: none; }
:root[data-theme="dark"] .partner-logo .logo-dark { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .partner-logo .logo-light { display: none; }
  :root:not([data-theme="light"]) .partner-logo .logo-dark { display: block; }
}
.partner-logo figcaption { font-size: .9rem; color: var(--muted); }

/* ---------- Kontak ---------- */
.contact { border-top: 1px solid var(--line); }
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: clamp(36px, 6vw, 80px);
  align-items: start;
}
.contact-info > p { margin-top: 14px; color: var(--muted); font-size: 1.1rem; max-width: 44ch; }

.details { margin: 32px 0 0; }
.details div { padding: 14px 0; border-top: 1px solid var(--line); }
.details div:last-child { border-bottom: 1px solid var(--line); }
.details dt { font-size: .9rem; color: var(--muted); }
.details dd { margin: 4px 0 0; font-weight: 550; overflow-wrap: anywhere; }
.area-note { margin-top: 18px; font-size: .95rem; color: var(--muted); }

.wa-form {
  background: var(--surface);
  border-radius: var(--radius);
  padding: clamp(22px, 3vw, 36px);
}
.field + .field { margin-top: 18px; }
.field label { display: block; font-weight: 600; margin-bottom: 6px; }
.field input, .field select, .field textarea {
  width: 100%; font: inherit; font-size: 1rem; color: var(--ink);
  background: var(--paper);
  border: 1.5px solid var(--line); border-radius: var(--radius);
  padding: 11px 12px; min-height: 48px;
}
.field textarea { resize: vertical; }
.field input::placeholder, .field textarea::placeholder { color: var(--muted); opacity: .85; }
.field input:focus-visible, .field select:focus-visible, .field textarea:focus-visible {
  border-color: var(--green); outline-offset: 1px;
}
.field [aria-invalid="true"] { border-color: #C2410C; }
.err { margin-top: 6px; font-size: .92rem; font-weight: 600; color: #B23A0B; }
:root[data-theme="dark"] .err { color: #FFA27A; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .err { color: #FFA27A; } }

.form-actions { display: grid; gap: 10px; margin-top: 24px; }
.wa-form .btn { width: 100%; }
.wa-form .btn-ghost { background: var(--paper); }
.form-status { margin-top: 14px; font-size: .95rem; }
.form-status:empty { display: none; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 28px 0; }
.footer-inner {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px;
  font-size: .92rem; color: var(--muted);
}

/* ---------- Tombol WhatsApp melayang ---------- */
.wa-float {
  position: fixed; z-index: 40;
  right: max(16px, env(safe-area-inset-right));
  bottom: max(16px, env(safe-area-inset-bottom));
  width: 58px; height: 58px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--btn-bg); color: var(--btn-fg);
  box-shadow: 0 6px 18px rgba(10, 40, 32, .28); /* satu-satunya bayangan: penanda elemen yang mengambang */
  text-decoration: none;
  transition: background-color .15s ease, transform .15s ease;
}
.wa-float:hover { background: var(--btn-bg-hover); transform: translateY(-2px); }
.wa-float:focus-visible { outline-offset: 4px; border-radius: 50%; }
.site-footer { padding-bottom: 96px; }
@media (min-width: 861px) { .site-footer { padding-bottom: 28px; } }

/* ---------- Responsif ---------- */
@media (max-width: 960px) {
  .svc-minor { grid-template-columns: 1fr 1fr; }
  .svc-minor article:nth-child(3) { padding-left: 0; border-left: 0; }
  .svc-minor article:nth-child(n+3) { margin-top: 8px; }
  .steps { grid-template-columns: 1fr 1fr; row-gap: 40px; }
  .steps::before { display: none; }
}

@media (max-width: 860px) {
  .nav-toggle { display: inline-block; }
  .site-nav {
    position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    padding: 8px var(--gutter) 20px;
    display: none;
  }
  .site-nav.is-open { display: flex; }
  .site-nav ul { flex-direction: column; gap: 0; }
  .site-nav ul a { display: block; padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav-tools { margin-top: 16px; }

  .hero-grid { grid-template-columns: 1fr; }
  .svc-primary { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .partner-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .brand-name { font-size: .95rem; }
  .hero-actions .btn { width: 100%; }
  .topology .topo-wide { display: none; }
  .topology .topo-narrow { display: block; margin: 0 auto; }
  .svc-minor { grid-template-columns: 1fr; }
  .svc-minor article,
  .svc-minor article + article { padding: 20px 0 0; border-left: 0; }
  .steps { grid-template-columns: 1fr; }
}

@media (max-width: 340px) {
  .brand-name { display: none; }
}

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