/* ============================================================
   THE TRAGEDY AT MARMARA SEA — design tokens
   Palette metaphor: the sea's own colour story, from clear
   Marmara teal to the murky olive of 2021's mucilage outbreak.
   ============================================================ */

:root{
  --ink:        #0E211D;
  --sea-deep:   #0A2A31;
  --sea-mid:    #146B72;
  --sea-bright: #1E8A8F;
  --sea-glow:   #4FD6CE;
  --mucilage:   #7C8A4A;
  --mucilage-dk:#565F32;
  --rust:       #C1502E;
  --amber:      #F2B48A;
  --foam:       #F4F7EF;
  --foam-dim:   #E7ECDC;
  --paper:      #FBFCF8;
  --line:       rgba(14,33,29,0.12);

  --display: "Fraunces", "Iowan Old Style", serif;
  --label:   "Space Grotesk", "IBM Plex Mono", monospace;
  --body:    "Source Serif 4", "Georgia", serif;

  --max: 880px;
  --wide: 1180px;
  --ease: cubic-bezier(.22,.68,0,1);
}

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

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--body);
  font-size:18px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

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

.container{ max-width:var(--max); margin:0 auto; padding:0 28px; }
.container-wide{ max-width:var(--wide); margin:0 auto; padding:0 28px; }

h1,h2,h3,h4{
  font-family:var(--display);
  font-weight:700;
  color:var(--sea-deep);
  margin:0 0 0.5em;
  letter-spacing:-0.01em;
}
h2{ font-size:clamp(1.9rem,3.8vw,2.75rem); font-weight:600; }
h3{ font-size:1.05rem; font-weight:600; color:var(--sea-mid); text-transform:uppercase; letter-spacing:0.03em; font-family:var(--label); }

p{ margin:0 0 1.1em; }
a{ color:var(--sea-mid); text-decoration-thickness:1.5px; }
a:hover{ color:var(--rust); }

.eyebrow{
  font-family:var(--label); text-transform:uppercase; letter-spacing:0.14em;
  font-size:0.78rem; color:var(--sea-bright); font-weight:600;
  display:inline-flex; align-items:center; gap:8px;
}
.eyebrow .dot{ width:6px; height:6px; border-radius:50%; background:currentColor; display:inline-block; }

.skip-link{ position:absolute; left:-999px; top:0; background:var(--sea-deep); color:#fff; padding:10px 16px; z-index:200; }
.skip-link:focus{ left:8px; top:8px; }
:focus-visible{ outline:3px solid var(--rust); outline-offset:2px; }

/* ---------- Scroll reveal ---------- */
.reveal{ opacity:0; transform:translateY(28px); transition:opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-visible{ opacity:1; transform:none; }
.reveal-stagger > *{ opacity:0; transform:translateY(20px); transition:opacity .6s var(--ease), transform .6s var(--ease); }
.reveal-stagger.is-visible > *{ opacity:1; transform:none; }
.reveal-stagger.is-visible > *:nth-child(1){ transition-delay:.02s; }
.reveal-stagger.is-visible > *:nth-child(2){ transition-delay:.10s; }
.reveal-stagger.is-visible > *:nth-child(3){ transition-delay:.18s; }
.reveal-stagger.is-visible > *:nth-child(4){ transition-delay:.26s; }
@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  .reveal, .reveal-stagger > *{ opacity:1 !important; transform:none !important; transition:none !important; }
}

/* ---------- Nav ---------- */
.site-nav{ position:sticky; top:0; z-index:100; background:rgba(251,252,248,0.92); backdrop-filter:blur(10px); border-bottom:1px solid var(--line); }
.site-nav .container-wide{ display:flex; align-items:center; justify-content:space-between; padding-top:14px; padding-bottom:14px; gap:16px; }
.site-nav .brand{ font-family:var(--label); font-weight:700; font-size:0.85rem; letter-spacing:0.02em; color:var(--sea-deep); white-space:nowrap; display:flex; align-items:center; gap:8px; }
.site-nav .brand svg{ width:20px; height:20px; }
.site-nav ul{ display:flex; flex-wrap:wrap; gap:20px; list-style:none; margin:0; padding:0; font-family:var(--label); font-size:0.76rem; letter-spacing:0.02em; }
.site-nav a{ color:var(--ink); text-decoration:none; text-transform:uppercase; padding:4px 0; border-bottom:2px solid transparent; transition:border-color .2s, color .2s; }
.site-nav a:hover{ border-bottom-color:var(--amber); color:var(--ink); }
.site-nav a.active{ color:var(--rust); border-bottom-color:var(--rust); }

/* ---------- Hero ---------- */
.hero{
  position:relative;
  background:linear-gradient(180deg, var(--sea-deep) 0%, #0d3a42 100%);
  color:var(--foam);
  padding:110px 0 40px;
  overflow:hidden;
  isolation:isolate;
}
.hero-illustration{ position:absolute; inset:0; z-index:0; opacity:0.9; }
.hero-illustration svg{ width:100%; height:100%; }
.hero::after{
  content:""; position:absolute; inset:0; z-index:1;
  background:linear-gradient(180deg, rgba(10,42,49,0.35) 0%, rgba(10,42,49,0.55) 55%, rgba(10,42,49,0.92) 100%);
}
.hero .container{ position:relative; z-index:2; }
.hero h1{
  color:#fff; font-size:clamp(2.6rem,7vw,4.6rem); line-height:1.02; margin:0.4em 0 0.45em;
  text-shadow:0 2px 30px rgba(0,0,0,0.25);
}
.hero .lede{ font-family:var(--body); font-size:1.28rem; color:#E4EFEB; max-width:640px; }
.hero .byline{ margin-top:26px; font-family:var(--label); font-size:0.85rem; color:#B9D6D2; letter-spacing:0.02em; }

.stat-strip{ margin-top:46px; display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:rgba(255,255,255,0.14); border-radius:12px; overflow:hidden; box-shadow:0 30px 60px -30px rgba(0,0,0,0.5); }
.stat-strip .stat{ background:rgba(9,36,42,0.72); padding:20px 18px; display:flex; flex-direction:column; gap:8px; }
.stat .icon{ width:22px; height:22px; color:var(--sea-glow); }
.stat .icon.warn{ color:var(--amber); }
.stat .num{ font-family:var(--label); font-weight:700; font-size:1.75rem; color:#fff; line-height:1; font-variant-numeric:tabular-nums; }
.stat .num.warn{ color:var(--amber); }
.stat .cap{ font-size:0.78rem; color:#B9D6D2; line-height:1.35; }

.scroll-cue{ display:flex; justify-content:center; padding:26px 0 4px; position:relative; z-index:2; }
.scroll-cue svg{ width:20px; height:20px; color:#9FCFC9; animation:bob 1.8s ease-in-out infinite; }
@keyframes bob{ 0%,100%{ transform:translateY(0); opacity:.5;} 50%{ transform:translateY(8px); opacity:1;} }

/* ---------- Wave dividers ---------- */
.wave{ display:block; width:100%; height:70px; margin-top:-2px; position:relative; z-index:2; }
.wave-1{ color:var(--sea-deep); }
.wave-2{ color:var(--sea-mid); }
.wave-3{ color:var(--sea-bright); }
.wave-4{ color:#9AA25E; }
.wave-5{ color:var(--mucilage); }
.wave-6{ color:var(--mucilage-dk); }

/* ---------- Sections ---------- */
section{ padding:84px 0; position:relative; }
.section-tight{ padding:56px 0; }
.bg-foam{ background:var(--foam); }
.bg-foam-dim{ background:var(--foam-dim); }
.bg-paper{ background:var(--paper); }
.bg-deep{ background:var(--sea-deep); color:#EAF3F1; }
.bg-deep h2, .bg-deep h3{ color:#EAF3F1; }
.bg-mucilage{ background:linear-gradient(160deg,#3c4324,var(--mucilage-dk)); color:#F0F1E4; }
.bg-mucilage h2, .bg-mucilage h3{ color:#F5F6EA; }

.section-num{ font-family:var(--label); font-size:0.78rem; color:var(--rust); letter-spacing:0.12em; display:flex; align-items:center; gap:10px; margin-bottom:14px; }
.section-num .line{ height:1px; width:36px; background:var(--rust); display:inline-block; }

/* Problem statement */
.research-question{
  position:relative; margin:30px 0 0; padding:38px 40px 32px;
  background:var(--paper); border-left:5px solid var(--rust); border-radius:2px;
  box-shadow:0 20px 44px -26px rgba(14,33,29,0.35);
}
.research-question .quote-mark{ position:absolute; top:8px; left:16px; font-family:var(--display); font-size:4rem; color:var(--rust); opacity:0.18; line-height:1; }
.research-question .rq{ font-family:var(--display); font-style:italic; font-size:1.45rem; color:var(--sea-deep); margin:0 0 0.6em; line-height:1.35; position:relative; }
.research-question p:last-child{ margin-bottom:0; font-size:1rem; }
.pull-fact{ display:inline-block; font-family:var(--label); font-weight:700; color:var(--rust); font-size:1.05rem; }

.bridge{
  margin-top:30px; padding:18px 22px 18px 20px; border-left:3px solid var(--sea-bright);
  background:rgba(30,138,143,0.07); font-family:var(--label); font-size:0.92rem;
  color:var(--sea-deep); line-height:1.55; display:flex; gap:12px; align-items:flex-start;
}
.bridge svg{ width:18px; height:18px; flex-shrink:0; margin-top:2px; color:var(--sea-bright); }
.bg-deep .bridge, .bg-mucilage .bridge{ border-left-color:var(--amber); background:rgba(255,255,255,0.08); color:#F0F4F0; }
.bg-deep .bridge svg, .bg-mucilage .bridge svg{ color:var(--amber); }

/* Charts */
.chart-boundary{ margin:34px 0 8px; background:var(--paper); border:1px solid var(--line); border-radius:10px; padding:24px 24px 10px; position:relative; overflow:hidden; box-shadow:0 18px 40px -30px rgba(14,33,29,0.3); }
.chart-boundary::before{ content:""; position:absolute; top:0; left:0; right:0; height:4px; background:linear-gradient(90deg,var(--sea-bright),var(--sea-mid)); }
.bg-deep .chart-boundary, .bg-mucilage .chart-boundary{ background:#0e343c; border-color:rgba(255,255,255,0.12); }
.bg-mucilage .chart-boundary::before{ background:linear-gradient(90deg,var(--amber),var(--rust)); }
.chart-boundary h3{ margin-bottom:16px; }
.chart-caption{ font-family:var(--label); font-size:0.82rem; color:var(--sea-mid); max-width:var(--max); margin-top:12px; }
.bg-deep .chart-caption, .bg-mucilage .chart-caption{ color:#B9D6D2; }

/* Map */
.map-frame{ margin:30px 0 16px; border-radius:10px; overflow:hidden; border:1px solid var(--line); background:#0e343c; aspect-ratio:16/10; box-shadow:0 24px 50px -30px rgba(14,33,29,0.4); }
.map-frame iframe{ width:100%; height:100%; border:0; display:block; }
.outfall-list{ list-style:none; margin:26px 0; padding:0; display:grid; grid-template-columns:repeat(3,1fr); gap:18px; }
.outfall-list li{ background:var(--paper); border:1px solid var(--line); border-radius:10px; padding:20px 20px 18px; transition:transform .25s var(--ease), box-shadow .25s var(--ease); }
.outfall-list li:hover{ transform:translateY(-4px); box-shadow:0 20px 40px -24px rgba(14,33,29,0.35); }
.outfall-list .icon{ width:26px; height:26px; color:var(--rust); margin-bottom:10px; }
.outfall-list .name{ font-family:var(--label); font-weight:700; font-size:0.92rem; color:var(--sea-deep); display:block; margin-bottom:6px; }
.map-button{ display:inline-flex; align-items:center; gap:8px; font-family:var(--label); font-size:0.85rem; font-weight:700; text-transform:uppercase; letter-spacing:0.04em; color:#fff; text-decoration:none; background:var(--rust); padding:13px 24px; border-radius:5px; margin-top:8px; transition:background .2s, transform .2s; }
.map-button:hover{ background:#a13f22; color:#fff; transform:translateY(-2px); }
button{ background:none; border:none; padding:0; cursor:pointer; }

/* Stakeholder onion */
.onion-wrap{ display:grid; grid-template-columns:1.1fr 1fr; gap:44px; align-items:center; margin-top:36px; }
.onion-svg{ width:100%; height:auto; }
.onion-svg text{ font-family:var(--label); pointer-events:none; }
.ring{ cursor:pointer; transition:opacity .25s var(--ease); }
.ring circle.fill{ transition:filter .25s var(--ease); }
.onion-svg .ring:hover circle.fill, .ring.ring-active circle.fill{ filter:brightness(1.28); }
.onion-hint{ font-family:var(--label); font-size:0.78rem; color:#9FCFC9; margin-top:14px; text-align:center; }

.stakeholder-cards{ display:grid; gap:14px; }
.s-card{ border:1px solid rgba(255,255,255,0.14); border-left:4px solid var(--ring-color, var(--sea-bright)); background:rgba(255,255,255,0.05); border-radius:8px; padding:16px 20px; transition:transform .25s var(--ease), background .25s var(--ease), border-color .25s var(--ease); cursor:pointer; }
.s-card:hover, .s-card.active{ transform:translateX(6px); background:rgba(255,255,255,0.1); }
.s-card h4{ font-family:var(--label); font-size:0.82rem; text-transform:uppercase; letter-spacing:0.04em; color:#fff; margin:0 0 6px; display:flex; align-items:center; gap:8px; }
.s-card h4 svg{ width:16px; height:16px; flex-shrink:0; }
.s-card p{ margin:0; font-size:0.95rem; color:#DCE6DA; }

/* Research & policy */
.foundation-grid{ display:grid; grid-template-columns:1fr 1fr; gap:20px; margin:30px 0 8px; }
.foundation-card{ background:var(--paper); border:1px solid var(--line); border-radius:10px; padding:22px 24px; transition:box-shadow .25s var(--ease), transform .25s var(--ease); }
.foundation-card:hover{ transform:translateY(-3px); box-shadow:0 20px 40px -28px rgba(14,33,29,0.3); }
.foundation-card .src{ font-family:var(--label); font-size:0.78rem; color:var(--sea-mid); text-transform:uppercase; letter-spacing:0.03em; display:block; margin-bottom:8px; }
.foundation-card p{ font-size:0.96rem; margin-bottom:0; }

.reco-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:18px; margin-top:26px; }
.reco{ padding:20px 22px; border-radius:10px; background:var(--foam); border:1px solid var(--line); transition:transform .25s var(--ease), box-shadow .25s var(--ease); }
.reco:hover{ transform:translateY(-3px); box-shadow:0 18px 36px -26px rgba(14,33,29,0.3); }
.reco .icon{ width:22px; height:22px; color:var(--rust); margin-bottom:10px; }
.reco h4{ font-family:var(--label); font-size:0.85rem; text-transform:uppercase; color:var(--rust); margin:0 0 8px; letter-spacing:0.03em; }
.reco p{ margin:0; font-size:0.95rem; }

/* Closing stat band */
.closing{ background:linear-gradient(160deg,var(--sea-deep),#0d3a42); color:#EAF3F1; padding:78px 0; text-align:center; position:relative; overflow:hidden; }
.closing h2{ color:#fff; max-width:680px; margin:0 auto 8px; }
.closing .sub{ color:#B9D6D2; max-width:560px; margin:0 auto 40px; font-size:1.05rem; }
.closing-stats{ display:grid; grid-template-columns:repeat(4,1fr); gap:28px; max-width:900px; margin:0 auto; }
.closing-stats .cnum{ font-family:var(--label); font-weight:700; font-size:2.1rem; color:var(--amber); font-variant-numeric:tabular-nums; }
.closing-stats .clabel{ font-size:0.82rem; color:#B9D6D2; margin-top:6px; font-family:var(--label); }

/* Footer / references */
footer{ background:var(--sea-deep); color:#B9D6D2; padding:60px 0 40px; font-family:var(--label); }
footer .container{ max-width:var(--wide); }
footer h3{ color:#EAF3F1; font-family:var(--label); font-size:0.9rem; letter-spacing:0.05em; margin-bottom:20px; }
footer ol{ padding-left:1.2em; margin:0; columns:2; column-gap:40px; }
footer li{ font-size:0.85rem; line-height:1.6; margin-bottom:14px; break-inside:avoid; }
footer a{ color:#8FE0DC; }
.credit{ margin-top:38px; font-size:0.78rem; color:#7FA6A0; columns:1; }

/* ---------- Hero illustration blobs ---------- */
.blob{ animation:blobFloat 6.5s ease-in-out infinite; transform-origin:center; }
.blob:nth-child(2n){ animation-duration:7.8s; animation-delay:.4s; }
.blob:nth-child(3n){ animation-delay:1.1s; animation-duration:5.6s; }
@keyframes blobFloat{ 0%,100%{ transform:translateY(0) scale(1); opacity:.45;} 50%{ transform:translateY(-9px) scale(1.1); opacity:.8;} }
@media (prefers-reduced-motion:reduce){ .blob{ animation:none; } }

/* ---------- Icon defaults ---------- */
svg.icon{ display:inline-block; overflow:visible; }

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .stat-strip{ grid-template-columns:repeat(2,1fr); }
  .onion-wrap{ grid-template-columns:1fr; }
  .foundation-grid{ grid-template-columns:1fr; }
  .reco-grid{ grid-template-columns:1fr; }
  .outfall-list{ grid-template-columns:1fr; }
  .closing-stats{ grid-template-columns:repeat(2,1fr); }
  footer ol{ columns:1; }
  .site-nav ul{ display:none; }
}

.catalog-btn {
    background-color: #2a6f97;
    padding: 6px 12px;
    border-radius: 4px;
    color: white !important;
}

.catalog-btn:hover {
    background-color: #d90429;
}

/* Strategic Policy Highlight styling */
.policy-box {
    background-color: #fff1f2;
    border-left: 5px solid #d90429;
    padding: 20px;
    border-radius: 4px;
    margin-top: 20px;
}
.policy-box h3 { margin: 0 0 10px 0; color: #9f1239; }
.policy-box ol { margin: 0; padding-left: 20px; }
.policy-box li { margin-bottom: 10px; color: #4c0519; }

/* Sticky Navigation Bar Layout */
.navbar {
    position: sticky;
    top: 0;
    background-color: #1a2f3b;
    padding: 15px 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border-bottom: 2px solid #2a6f97;
}

.nav-container {
    max-width: 820px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.nav-brand {
    color: white;
    text-decoration: none;
    font-weight: 700;
    font-family: 'Montserrat', sans-serif;
}

.nav-links a {
    color: #cbd5e1;
    text-decoration: none;
    margin-left: 20px;
    font-size: 0.9rem;
    font-family: 'Montserrat', sans-serif;
    transition: color 0.2s ease;
}

.nav-links a:hover {
    color: white;
}