/* =========================================================================
   YOUSEF DARVISHVAND — Business Ecosystem Architect & Entrepreneur
   Design system: "The Blueprint" — an architect's drafting language.
   Grid coordinates, dashed connector lines, node diagrams and FIG./REF
   annotations are the literal visual vocabulary of ecosystem architecture.
   ========================================================================= */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root{
  /* ---- DARK (default) ---- */
  --bg: #0A0E16;
  --bg-elevated: #0F1420;
  --surface: #131928;
  --surface-2: #171f30;
  --border: #232D40;
  --border-strong: #35435e;
  --grid-line: rgba(140,168,214,0.07);
  --grid-line-strong: rgba(140,168,214,0.14);
  --text-primary: #EDEFF3;
  --text-secondary: #9AA6BA;
  --text-tertiary: #5C6980;
  --accent: #C9A15C;
  --accent-strong: #E0BA79;
  --accent-soft: rgba(201,161,92,0.12);
  --accent-line: #5A76A6;
  --link-line: #3D4C6B;

  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --container: 1180px;
  --radius: 2px;
  --shadow-card: 0 1px 0 rgba(0,0,0,0.4);

  color-scheme: dark;
}

html[data-theme="light"]{
  --bg: #F1EEE7;
  --bg-elevated: #E9E4D9;
  --surface: #FBFAF7;
  --surface-2: #F3EFE6;
  --border: #D9D2C2;
  --border-strong: #C3B9A3;
  --grid-line: rgba(60,70,95,0.07);
  --grid-line-strong: rgba(60,70,95,0.14);
  --text-primary: #14181F;
  --text-secondary: #48505F;
  --text-tertiary: #7C8494;
  --accent: #97672A;
  --accent-strong: #7A5320;
  --accent-soft: rgba(151,103,42,0.10);
  --accent-line: #5A6B85;
  --link-line: #C9BFA9;
  color-scheme: light;
}

*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin:0;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background .35s ease, color .35s ease;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  background-attachment: fixed;
}

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

::selection{ background: var(--accent); color:#0A0E16; }

a{ color: inherit; text-decoration: none; }
img{ max-width:100%; display:block; }

.container{ max-width: var(--container); margin: 0 auto; padding: 0 24px; }

h1,h2,h3,h4{
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.08;
  margin: 0;
  letter-spacing: -0.01em;
}

p{ margin: 0; }

.eyebrow{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before{
  content:"";
  width: 22px;
  height: 1px;
  background: var(--accent);
  display: inline-block;
}

.fig-label{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

/* ---------------------------- SKIP LINK --------------------------------- */
.skip-link{
  position:absolute; left:-999px; top:auto;
  background: var(--accent); color:#0A0E16; padding: 10px 16px; z-index: 999;
  font-family: var(--font-mono); font-size: 13px;
}
.skip-link:focus{ left: 16px; top: 16px; }

/* ------------------------------- FOCUS ---------------------------------- */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ------------------------------- HEADER --------------------------------- */
.site-header{
  position: sticky; top: 0; z-index: 500;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-row{
  display:flex; align-items:center; justify-content:space-between;
  height: 76px;
}
.brand{ display:flex; align-items:center; gap:12px; font-family: var(--font-display); }
.brand-mark{ width:34px; height:34px; flex-shrink:0; }
.brand-text{ display:flex; flex-direction:column; line-height:1.1; }
.brand-name{ font-size:15px; font-weight:600; letter-spacing:0.01em; }
.brand-role{ font-family: var(--font-mono); font-size:10px; letter-spacing:0.08em; text-transform:uppercase; color: var(--text-tertiary); margin-top:2px; }

.main-nav{ display:flex; align-items:center; gap: 30px; }
.main-nav a{
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 0;
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active{ color: var(--text-primary); }
.main-nav a.active::after{
  content:""; position:absolute; left:0; right:0; bottom:-2px; height:2px; background: var(--accent);
}

.header-actions{ display:flex; align-items:center; gap: 14px; }

/* Theme toggle — day/night switch */
.theme-toggle{
  --size: 40px;
  width: var(--size); height: var(--size);
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  display:flex; align-items:center; justify-content:center;
  cursor:pointer;
  color: var(--text-primary);
  position: relative;
  flex-shrink:0;
}
.theme-toggle:hover{ border-color: var(--accent); }
.theme-toggle svg{ width:18px; height:18px; }
.theme-toggle .icon-sun{ display:none; }
html[data-theme="light"] .theme-toggle .icon-moon{ display:none; }
html[data-theme="light"] .theme-toggle .icon-sun{ display:block; }

.nav-toggle{
  display:none;
  width: 40px; height:40px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  align-items:center; justify-content:center;
  cursor:pointer;
  flex-direction: column;
  gap:4px;
}
.nav-toggle span{ width:16px; height:1.5px; background: var(--text-primary); display:block; transition: transform .25s ease, opacity .25s ease; }
.nav-toggle.is-open span:nth-child(1){ transform: translateY(5.5px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2){ opacity:0; }
.nav-toggle.is-open span:nth-child(3){ transform: translateY(-5.5px) rotate(-45deg); }

/* mobile nav panel */
.mobile-nav{
  display:none;
  position: fixed; inset: 76px 0 0 0;
  background: var(--bg);
  z-index: 490;
  overflow-y: auto;
  padding: 8px 24px 40px;
}
.mobile-nav.is-open{ display:block; }
.mobile-nav a{
  display:flex; align-items:center; justify-content:space-between;
  padding: 18px 2px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-display); font-size: 22px; font-weight:500;
}
.mobile-nav a span.num{ font-family: var(--font-mono); font-size:12px; color: var(--text-tertiary); }
.mobile-nav a.active{ color: var(--accent); }

/* ------------------------------- BUTTONS -------------------------------- */
.btn{
  display:inline-flex; align-items:center; gap:10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 14px 22px;
  border-radius: var(--radius);
  border: 1px solid var(--border-strong);
  cursor:pointer;
  transition: border-color .2s ease, background .2s ease, color .2s ease, transform .2s ease;
}
.btn-primary{ background: var(--accent); border-color: var(--accent); color:#0A0E16; }
.btn-primary:hover{ background: var(--accent-strong); border-color: var(--accent-strong); transform: translateY(-1px); }
.btn-ghost{ background: transparent; color: var(--text-primary); }
.btn-ghost:hover{ border-color: var(--accent); color: var(--accent); }
.btn-arrow{ transition: transform .2s ease; }
.btn:hover .btn-arrow{ transform: translateX(3px); }

/* ------------------------------- HERO ----------------------------------- */
.hero{
  position:relative;
  padding: 96px 0 80px;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.hero-grid{
  display:grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items:center;
}
.hero-kicker{ margin-bottom: 26px; }
.hero-title{
  font-size: clamp(38px, 6vw, 68px);
  margin-bottom: 22px;
}
.hero-title .accent-word{ color: var(--accent); }
.hero-lede{
  font-size: 18px; color: var(--text-secondary); max-width: 46ch; margin-bottom: 34px;
}
.hero-cta{ display:flex; gap:14px; flex-wrap:wrap; margin-bottom: 44px; }
.hero-coords{
  font-family: var(--font-mono); font-size:11px; color: var(--text-tertiary);
  display:flex; gap:22px; flex-wrap:wrap; letter-spacing:0.04em;
}
.hero-coords b{ color: var(--text-secondary); font-weight:500; }

.hero-diagram-wrap{ position:relative; }
.hero-diagram{ width:100%; height:auto; }

/* -------------------------- CREDIBILITY STRIP --------------------------- */
.strip{
  border-bottom: 1px solid var(--border);
  padding: 22px 0;
}
.strip-row{
  display:flex; flex-wrap:wrap; gap: 10px 34px; align-items:center; justify-content:space-between;
}
.strip-item{
  font-family: var(--font-mono); font-size: 12px; letter-spacing:0.04em; color: var(--text-secondary);
  display:flex; align-items:center; gap:8px; white-space:nowrap;
}
.strip-item .dot{ width:5px; height:5px; border-radius:50%; background: var(--accent); flex-shrink:0; }

/* ------------------------------ SECTION --------------------------------- */
.section{ padding: 96px 0; border-bottom: 1px solid var(--border); }
.section-tight{ padding: 72px 0; }
.section:last-of-type{ border-bottom:none; }
.section-head{
  display:flex; justify-content:space-between; align-items:flex-end; gap:24px;
  margin-bottom: 56px; flex-wrap: wrap;
}
.section-title{ font-size: clamp(28px, 4vw, 42px); margin-top:14px; max-width: 20ch; }
.section-desc{ color: var(--text-secondary); max-width: 42ch; font-size:15px; }

/* --------------------------- ECOSYSTEM DIAGRAM --------------------------- */
.ecosystem-diagram-frame{
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  padding: 32px;
  position: relative;
}
.ecosystem-diagram-frame::before{
  content: attr(data-fig);
  position:absolute; top:14px; left:18px;
  font-family: var(--font-mono); font-size:10px; letter-spacing:0.1em; color: var(--text-tertiary);
}
.eco-svg{ width:100%; height:auto; }
.eco-node{ cursor:pointer; }
.eco-node circle.node-dot{ transition: r .2s ease, fill .2s ease; }
.eco-node:hover circle.node-dot, .eco-node:focus circle.node-dot{ fill: var(--accent); }
.eco-node text{ font-family: var(--font-mono); }
.eco-link{ stroke-dasharray: 3 4; }

.eco-legend{
  margin-top: 28px; display:grid; grid-template-columns: repeat(auto-fit,minmax(220px,1fr)); gap: 18px;
}
.eco-legend-item{ border-top:1px solid var(--border); padding-top:14px; }
.eco-legend-item h4{ font-size:15px; margin-bottom:6px; }
.eco-legend-item p{ font-size: 13.5px; color: var(--text-secondary); }
.eco-legend-item .tag{ font-family: var(--font-mono); font-size:10px; color: var(--accent); letter-spacing:0.08em; text-transform:uppercase; }

/* ------------------------------- CARDS ----------------------------------- */
.grid-2{ display:grid; grid-template-columns: repeat(2,1fr); gap: 1px; background: var(--border); border:1px solid var(--border); }
.grid-4{ display:grid; grid-template-columns: repeat(4,1fr); gap: 1px; background: var(--border); border:1px solid var(--border); }
.grid-3{ display:grid; grid-template-columns: repeat(3,1fr); gap: 1px; background: var(--border); border:1px solid var(--border); }

.card{
  background: var(--surface); padding: 32px; position:relative;
}
.card .fig-label{ margin-bottom: 18px; display:block; }
.card h3{ font-size: 19px; margin-bottom: 10px; }
.card p{ color: var(--text-secondary); font-size: 14.5px; }
.card .card-num{ font-family: var(--font-mono); color: var(--text-tertiary); font-size:12px; position:absolute; top:20px; right:24px; }

/* --------------------------------- STATS --------------------------------- */
.stat{ background: var(--surface); padding: 34px 28px; }
.stat-num{ font-family: var(--font-display); font-size: clamp(30px,4vw,44px); color: var(--accent); }
.stat-label{ font-family: var(--font-mono); font-size:11px; letter-spacing:0.08em; text-transform:uppercase; color: var(--text-secondary); margin-top: 8px; }
.stat-note{ font-size:12px; color: var(--text-tertiary); margin-top:10px; }

/* -------------------------------- TIMELINE -------------------------------- */
.timeline{ position:relative; padding-left: 34px; border-left: 1px dashed var(--border-strong); }
.timeline-item{ position:relative; padding-bottom: 46px; }
.timeline-item:last-child{ padding-bottom:0; }
.timeline-item::before{
  content:""; position:absolute; left:-40px; top:4px; width:10px; height:10px; border-radius:50%;
  background: var(--bg); border: 2px solid var(--accent);
}
.timeline-year{ font-family: var(--font-mono); font-size:12px; color: var(--accent); letter-spacing:0.08em; margin-bottom:8px; display:block; }
.timeline-item h3{ font-size:20px; margin-bottom:8px; }
.timeline-item p{ color: var(--text-secondary); font-size:14.5px; max-width: 56ch; }

/* -------------------------------- QUOTE ----------------------------------- */
.pull-quote{
  font-family: var(--font-display); font-size: clamp(22px,3vw,32px); line-height:1.3;
  border-left: 2px solid var(--accent); padding-left: 28px; color: var(--text-primary); max-width: 62ch;
}

/* -------------------------------- ARTICLES -------------------------------- */
.article-list{ display:flex; flex-direction:column; }
.article-row{
  display:grid; grid-template-columns: 120px 1fr auto; gap: 24px; align-items:center;
  padding: 26px 0; border-bottom: 1px solid var(--border);
  transition: padding-left .2s ease;
}
.article-row:hover{ padding-left: 8px; }
.article-row:first-child{ border-top: 1px solid var(--border); }
.article-tag{ font-family: var(--font-mono); font-size:11px; color: var(--accent); text-transform:uppercase; letter-spacing:0.06em; }
.article-title{ font-family: var(--font-display); font-size: 19px; font-weight:500; }
.article-arrow{ color: var(--text-tertiary); font-family: var(--font-mono); }

.filter-row{ display:flex; gap:10px; flex-wrap:wrap; margin-bottom: 40px; }
.filter-pill{
  font-family: var(--font-mono); font-size:11.5px; letter-spacing:0.05em; text-transform:uppercase;
  padding: 9px 16px; border:1px solid var(--border-strong); border-radius: 30px; cursor:pointer;
  color: var(--text-secondary); background: transparent;
}
.filter-pill.active, .filter-pill:hover{ border-color: var(--accent); color: var(--accent); }

/* -------------------------------- MEDIA ------------------------------------ */
.media-row{
  display:grid; grid-template-columns: 90px 1fr; gap:22px;
  padding: 24px 0; border-bottom:1px solid var(--border);
}
.media-row:first-child{ border-top:1px solid var(--border); }
.media-type{ font-family: var(--font-mono); font-size:11px; color: var(--text-tertiary); letter-spacing:0.06em; text-transform:uppercase; padding-top:3px; }
.media-row h3{ font-size:17px; margin-bottom:6px; }
.media-row p{ color: var(--text-secondary); font-size:14px; }
.media-meta{ font-family: var(--font-mono); font-size:11px; color: var(--text-tertiary); margin-top:8px; }

/* -------------------------------- CONTACT ---------------------------------- */
.contact-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--border); border:1px solid var(--border); margin-bottom: 64px; }
.contact-card{ background: var(--surface); padding: 34px; }
.contact-card h3{ font-size:18px; margin-bottom:10px; }
.contact-card p{ color: var(--text-secondary); font-size:14px; margin-bottom:18px; }
.contact-card a.link{ font-family: var(--font-mono); font-size:12.5px; color: var(--accent); letter-spacing:0.03em; }

.form-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.form-field{ display:flex; flex-direction:column; gap:8px; }
.form-field.full{ grid-column: 1 / -1; }
.form-field label{ font-family: var(--font-mono); font-size:11px; letter-spacing:0.08em; text-transform:uppercase; color: var(--text-tertiary); }
.form-field input, .form-field select, .form-field textarea{
  background: var(--surface); border: 1px solid var(--border-strong); color: var(--text-primary);
  padding: 13px 14px; font-family: var(--font-body); font-size: 14.5px; border-radius: var(--radius);
}
.form-field textarea{ resize: vertical; min-height: 120px; }
.form-field input:focus, .form-field select:focus, .form-field textarea:focus{ outline:none; border-color: var(--accent); }
.form-note{ font-size:12px; color: var(--text-tertiary); margin-top:16px; }

/* -------------------------------- FOOTER ------------------------------------ */
.site-footer{ padding: 64px 0 40px; }
.footer-top{ display:grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 56px; }
.footer-brand{ display:flex; align-items:center; gap:12px; margin-bottom:16px; }
.footer-brand .brand-mark{ width:28px; height:28px; }
.footer-tagline{ color: var(--text-secondary); font-size:13.5px; max-width: 32ch; }
.footer-col h4{ font-family: var(--font-mono); font-size:11px; letter-spacing:0.1em; text-transform:uppercase; color: var(--text-tertiary); margin-bottom:16px; }
.footer-col a{ display:block; font-size: 14px; color: var(--text-secondary); padding: 6px 0; }
.footer-col a:hover{ color: var(--accent); }
.footer-bottom{
  display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:12px;
  border-top:1px solid var(--border); padding-top: 26px;
  font-family: var(--font-mono); font-size: 11.5px; color: var(--text-tertiary);
}
.footer-bottom .socials{ display:flex; gap:16px; }

/* -------------------------------- PAGE HEADER (inner pages) ----------------- */
.page-hero{ padding: 64px 0 56px; border-bottom: 1px solid var(--border); }
.page-hero .section-title{ margin-top:14px; }
.breadcrumb{ font-family: var(--font-mono); font-size:11.5px; color: var(--text-tertiary); letter-spacing:0.05em; }
.breadcrumb a{ color: var(--text-tertiary); }
.breadcrumb a:hover{ color: var(--accent); }

/* -------------------------------- UTILS -------------------------------------- */
.mt-lg{ margin-top: 40px; }
.center-cta{ text-align:center; padding: 30px 0 10px; }
.reveal{ opacity:0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible{ opacity:1; transform: translateY(0); }

.edit-hint{ display:none; } /* placeholder class for editable regions, purely semantic */

/* ================================ RESPONSIVE ================================= */
@media (max-width: 980px){
  .hero-grid{ grid-template-columns: 1fr; }
  .grid-4{ grid-template-columns: repeat(2,1fr); }
  .footer-top{ grid-template-columns: 1fr 1fr; }
  .contact-grid{ grid-template-columns: 1fr; }
}

@media (max-width: 760px){
  body{ background-size: 40px 40px; }
  .main-nav{ display:none; }
  .nav-toggle{ display:flex; }
  .header-row{ height: 68px; }
  .hero{ padding: 56px 0 52px; }
  .section{ padding: 64px 0; }
  .grid-2, .grid-3, .grid-4{ grid-template-columns: 1fr; }
  .footer-top{ grid-template-columns: 1fr; gap: 30px; }
  .article-row{ grid-template-columns: 1fr; gap:6px; }
  .article-arrow{ display:none; }
  .form-grid{ grid-template-columns: 1fr; }
  .media-row{ grid-template-columns: 1fr; gap:8px; }
  .strip-row{ justify-content:flex-start; }
  .hero-coords{ gap: 14px 20px; }
  .mobile-nav{ inset: 68px 0 0 0; }
}