/* ============================================================
   ZEPHYRLINE NETWORKS — design tokens
   Palette sampled directly from brand logo assets.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,600;9..144,700;9..144,900&family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  /* color — sampled from logo: navy #0B1423, wordmark cream #C9C5BA, mauve accent #4A4560 */
  --ink:         #0B1423;
  --ink-2:       #121D30;
  --ink-3:       #182642;
  --ink-soft:    #5B5670;
  --parchment:   #EDEAE1;
  --parchment-2: #E3DFD2;
  --paper:       #F6F4EC;
  --cream:       #C9C5BA;
  --mauve:       #4A4560;
  --mauve-bright:#8B82AE;
  --mauve-deep:  #302B44;
  --line:        rgba(11,20,35,0.15);
  --line-on-dark:rgba(201,197,186,0.20);
  --white:       #FFFFFF;

  /* type */
  --f-display: 'Fraunces', serif;
  --f-body: 'IBM Plex Sans', sans-serif;
  --f-mono: 'IBM Plex Mono', monospace;

  /* layout */
  --maxw: 1180px;
  --pad: clamp(20px, 5vw, 64px);
  --radius: 2px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--parchment);
  color:var(--ink);
  font-family:var(--f-body);
  font-size:16px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
img,svg{ display:block; max-width:100%; }
a{ color:inherit; }
h1,h2,h3,h4{ font-family:var(--f-display); font-weight:600; margin:0; line-height:1.08; letter-spacing:-0.01em; }
p{ margin:0; }
ul{ margin:0; padding:0; list-style:none; }
button{ font-family:inherit; }

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

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; scroll-behavior:auto !important; }
}

.wrap{ max-width:var(--maxw); margin:0 auto; padding-left:var(--pad); padding-right:var(--pad); }

.eyebrow{
  font-family:var(--f-mono); font-size:0.76rem; letter-spacing:0.1em; text-transform:uppercase;
  color:var(--mauve-bright);
}
.eyebrow.on-light{ color:var(--mauve); }

/* ---------------- header / nav ---------------- */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(11,20,35,0.94);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line-on-dark);
}
.nav{ display:flex; align-items:center; justify-content:space-between; padding-top:14px; padding-bottom:14px; }
.brand{ display:flex; align-items:center; gap:10px; text-decoration:none; }
.brand img{ height:30px; width:30px; flex-shrink:0; }
.brand > span{ display:flex; flex-direction:column; line-height:1.2; }
.brand .word{ display:block; font-family:var(--f-display); font-weight:600; font-size:1.2rem; color:var(--cream); letter-spacing:0.01em; }
.brand .sub{ font-family:var(--f-mono); font-weight:400; font-size:0.64rem; color:var(--ink-soft); text-transform:uppercase; letter-spacing:0.1em; display:block; margin-top:1px; }
.nav-links{ display:flex; align-items:center; gap:2px; }
.nav-links a{
  display:block; padding:10px 16px; text-decoration:none;
  color:#B9B6C4; font-size:0.92rem; font-weight:500;
  border-radius:var(--radius);
  transition:color .15s ease, background .15s ease;
}
.nav-links a:hover{ color:var(--white); background:rgba(201,197,186,0.08); }
.nav-links a.current{ color:var(--cream); }
.nav-cta{
  margin-left:8px !important;
  background:var(--cream) !important; color:var(--ink) !important;
  font-weight:700 !important;
}
.nav-cta:hover{ background:var(--white) !important; }
.nav-toggle{
  display:none; background:none; border:1px solid var(--line-on-dark);
  color:var(--cream); padding:8px 10px; border-radius:var(--radius); cursor:pointer;
}

@media (max-width: 860px){
  .nav-toggle{ display:block; }
  .nav-links{
    position:absolute; top:100%; left:0; right:0;
    flex-direction:column; align-items:stretch;
    background:var(--ink-2); border-bottom:1px solid var(--line-on-dark);
    padding:8px; gap:0; display:none;
  }
  .nav-links.open{ display:flex; }
  .nav-links a{ padding:14px 16px; }
  .nav-cta{ margin-left:0 !important; text-align:center; margin-top:6px; }
}

/* ---------------- hero ---------------- */
.hero{
  background:var(--ink);
  color:var(--white);
  padding:64px 0 0;
  overflow:hidden;
}
.hero-inner{ display:grid; grid-template-columns:1.05fr 0.95fr; gap:48px; align-items:center; padding-bottom:40px; }
.hero h1{ font-size:clamp(2.1rem, 4.4vw, 3.4rem); font-weight:600; margin-top:14px; color:var(--cream); }
.hero h1 em{ color:var(--mauve-bright); font-style:italic; }
.hero .lede{ margin-top:20px; max-width:52ch; font-size:1.08rem; color:#B9B6C4; }
.hero-actions{ display:flex; gap:12px; margin-top:30px; flex-wrap:wrap; }

.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:13px 22px; border-radius:var(--radius);
  font-weight:700; font-size:0.95rem; text-decoration:none;
  border:1px solid transparent; cursor:pointer;
  transition:transform .12s ease, background .15s ease, border-color .15s ease;
}
.btn:hover{ transform:translateY(-1px); }
.btn-signal{ background:var(--cream); color:var(--ink); }
.btn-signal:hover{ background:var(--white); }
.btn-outline{ border-color:var(--line-on-dark); color:var(--cream); }
.btn-outline:hover{ border-color:var(--cream); }
.btn-ink{ background:var(--mauve); color:var(--parchment); }
.btn-ink:hover{ background:var(--mauve-deep); }

.hero-meta{
  margin-top:34px; display:flex; gap:28px; flex-wrap:wrap;
  font-family:var(--f-mono); font-size:0.8rem; color:#7F7C90;
  border-top:1px solid var(--line-on-dark); padding-top:18px;
}
.hero-meta strong{ color:var(--cream); display:block; font-size:1rem; font-family:var(--f-display); font-weight:600; }

@media (max-width: 900px){ .hero-inner{ grid-template-columns:1fr; padding-bottom:20px; } }

/* ---------------- signature: line-of-sight diagram ---------------- */
.los-diagram{ width:100%; }
.los-beam{ stroke-dasharray:6 7; animation:beam-move 1.6s linear infinite; }
@keyframes beam-move{ to{ stroke-dashoffset:-26; } }
.los-pulse{ animation:pulse-fade 2.2s ease-in-out infinite; }
@keyframes pulse-fade{ 0%,100%{ opacity:0.35; } 50%{ opacity:1; } }
.los-readout{ font-family:var(--f-mono); }

.tower-photo{ margin:0; position:relative; border-radius:var(--radius); overflow:hidden; border:1px solid var(--line-on-dark); }
.tower-photo img{ width:100%; height:100%; aspect-ratio:1/1; object-fit:cover; display:block; }
.tower-photo figcaption{
  position:absolute; left:0; right:0; bottom:0;
  padding:14px 18px;
  background:linear-gradient(0deg, rgba(11,20,35,0.92) 0%, rgba(11,20,35,0) 100%);
  color:var(--cream); font-size:0.78rem; letter-spacing:0.04em;
}

/* ---------------- sections ---------------- */
section{ padding:72px 0; }
.section-head{ max-width:640px; margin-bottom:40px; }
.section-head h2{ font-size:clamp(1.6rem,3vw,2.2rem); margin-top:10px; color:inherit; }
.section-head p{ margin-top:14px; color:var(--ink-soft); font-size:1.02rem; }

.on-dark{ background:var(--ink); color:var(--cream); }
.on-dark .section-head p{ color:#ADA9BC; }
.on-steel{ background:var(--ink-3); color:var(--cream); }

/* audience doors */
.doors{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
.door{
  background:var(--paper); border:1px solid var(--line); border-radius:var(--radius);
  padding:30px 26px; text-decoration:none; color:var(--ink);
  display:flex; flex-direction:column; gap:14px;
  transition:border-color .15s ease, transform .15s ease, box-shadow .15s ease;
}
.door:hover{ border-color:var(--mauve); transform:translateY(-3px); box-shadow:0 10px 24px rgba(11,20,35,0.10); }
.door .tag{ font-family:var(--f-mono); font-size:0.72rem; letter-spacing:0.06em; text-transform:uppercase; color:var(--mauve); }
.door h3{ font-size:1.3rem; }
.door p{ color:var(--ink-soft); font-size:0.95rem; flex-grow:1; }
.door .go{ font-family:var(--f-mono); font-size:0.85rem; font-weight:600; color:var(--mauve); }

@media (max-width:900px){ .doors{ grid-template-columns:1fr; } }

/* numbered process (legitimate sequence only) */
.steps{ display:grid; grid-template-columns:repeat(4,1fr); gap:18px; counter-reset:step; }
.step{ border-top:2px solid var(--mauve-bright); padding-top:16px; }
.step .num{ font-family:var(--f-mono); font-size:0.85rem; color:var(--mauve-bright); }
.step h4{ font-size:1.05rem; margin-top:8px; font-weight:600; }
.step p{ margin-top:8px; color:var(--ink-soft); font-size:0.92rem; }
.on-dark .step p{ color:#ADA9BC; }
@media (max-width:900px){ .steps{ grid-template-columns:1fr 1fr; } }
@media (max-width:560px){ .steps{ grid-template-columns:1fr; } }

/* spec table (mono, engineered feel) */
.spec-table{ width:100%; border-collapse:collapse; font-family:var(--f-mono); font-size:0.92rem; }
.spec-table tr{ border-bottom:1px solid var(--line); }
.spec-table td{ padding:14px 4px; }
.spec-table td:first-child{ color:var(--ink-soft); width:46%; }
.spec-table td:last-child{ font-weight:600; }
.on-dark .spec-table tr{ border-bottom-color:var(--line-on-dark); }
.on-dark .spec-table td:first-child{ color:#8F8CA0; }

/* feature grid */
.feat-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:26px; }
.feat{ display:flex; flex-direction:column; gap:10px; }
.feat .ic{ width:34px; height:34px; }
.feat h4{ font-size:1.05rem; font-weight:600; }
.feat p{ color:var(--ink-soft); font-size:0.93rem; }
@media (max-width:900px){ .feat-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:560px){ .feat-grid{ grid-template-columns:1fr; } }

/* founder / local ethos block */
.ethos{ display:grid; grid-template-columns:0.9fr 1.1fr; gap:48px; align-items:center; }
.ethos blockquote{ font-family:var(--f-display); font-weight:600; font-style:italic; font-size:1.5rem; line-height:1.3; margin:0; color:var(--ink); }
.ethos cite{ display:block; margin-top:16px; font-style:normal; font-family:var(--f-mono); font-size:0.85rem; color:var(--ink-soft); }
@media (max-width:900px){ .ethos{ grid-template-columns:1fr; } }

/* form card */
.form-card{ background:var(--paper); border:1px solid var(--line); border-radius:var(--radius); padding:34px; max-width:560px; }
.form-row{ margin-bottom:16px; }
.form-row label{ display:block; font-family:var(--f-mono); font-size:0.78rem; text-transform:uppercase; letter-spacing:0.05em; color:var(--ink-soft); margin-bottom:6px; }
.form-row input, .form-row select, .form-row textarea{
  width:100%; padding:12px 14px; border:1px solid var(--line); border-radius:var(--radius);
  background:var(--white); font-family:var(--f-body); font-size:0.98rem; color:var(--ink);
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus{ border-color:var(--mauve); }
.form-note{ font-size:0.82rem; color:var(--ink-soft); margin-top:14px; }

/* status pill */
.pill{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--f-mono); font-size:0.82rem; padding:7px 14px;
  border:1px solid var(--line-on-dark); border-radius:20px; color:#CBC7D6;
}
.pill .dot{ width:7px; height:7px; border-radius:50%; background:var(--mauve-bright); animation:pulse-fade 1.8s ease-in-out infinite; }

/* callout / banner */
.callout{ border:1px solid var(--line); border-left:3px solid var(--mauve); background:var(--paper); padding:20px 24px; border-radius:var(--radius); }
.callout p{ color:var(--ink-soft); font-size:0.94rem; }
.callout strong{ color:var(--ink); }

/* footer */
footer{ background:var(--ink); color:#B9B6C4; padding:56px 0 28px; }
.foot-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:32px; }
.foot-grid h5{ font-family:var(--f-mono); font-size:0.78rem; text-transform:uppercase; letter-spacing:0.06em; color:#6E6A82; margin-bottom:14px; }
.foot-grid a{ display:block; text-decoration:none; color:#B9B6C4; font-size:0.92rem; padding:5px 0; }
.foot-grid a:hover{ color:var(--cream); }
.foot-brand p{ color:#79768A; font-size:0.88rem; max-width:34ch; margin-top:10px; }
.foot-bottom{
  margin-top:44px; padding-top:22px; border-top:1px solid var(--line-on-dark);
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;
  font-family:var(--f-mono); font-size:0.78rem; color:#6E6A82;
}
@media (max-width:800px){ .foot-grid{ grid-template-columns:1fr 1fr; } }

/* generic page hero (secondary pages) */
.page-hero{ background:var(--ink); color:var(--white); padding:56px 0; }
.logo-lockup{ display:flex; align-items:center; gap:12px; }
.logo-lockup img{ height:44px; width:44px; }
.logo-lockup .word{ font-family:var(--f-display); font-weight:600; font-size:1.5rem; color:var(--cream); }
.logo-lockup .sub{ font-family:var(--f-mono); font-size:0.66rem; letter-spacing:0.14em; color:var(--mauve-bright); text-transform:uppercase; }
.page-hero h1{ font-size:clamp(1.9rem,4vw,2.8rem); margin-top:12px; color:var(--cream); }
.page-hero .lede{ margin-top:16px; max-width:60ch; color:#B9B6C4; font-size:1.05rem; }

.two-col{ display:grid; grid-template-columns:1.1fr 0.9fr; gap:48px; align-items:start; }
@media (max-width:900px){ .two-col{ grid-template-columns:1fr; } }

.check-list li{ display:flex; gap:10px; padding:9px 0; font-size:0.96rem; color:var(--ink-soft); }
.on-dark .check-list li{ color:#B9B6C4; }
.check-list li svg{ flex-shrink:0; margin-top:3px; }