/* Kolektif Vizyon — logo renkleri: lacivert #153F58, bronz #9D7435 */
:root {
  --navy: #153F58;
  --navy-deep: #0D2A3C;
  --bronze: #9D7435;
  --bronze-text: #7A5822;      /* küçük metinlerde yeterli kontrast için */
  --bronze-light: #E6D5B8;
  --paper: #F4F6F7;
  --white: #FFFFFF;
  --ink: #17293A;
  --muted: #52636F;
  --line: #D9E0E5;
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "Figtree", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --container: 1180px;
  --hex: polygon(50% 0, 100% 25%, 100% 75%, 50% 100%, 0 75%, 0 25%);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--navy); text-underline-offset: 3px; }
a:hover { color: var(--bronze-text); }
:focus-visible { outline: 3px solid var(--bronze); outline-offset: 3px; border-radius: 2px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 500; color: var(--navy); line-height: 1.15; margin: 0 0 .6em; letter-spacing: -.01em; }
h2 { font-size: clamp(2rem, 3.6vw, 2.75rem); }
h3 { font-size: 1.35rem; }
p { margin: 0 0 1em; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 clamp(1.25rem, 4vw, 2.5rem); }
.narrow > * { max-width: 820px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 0; background: var(--navy); color: #fff; padding: .6rem 1rem; z-index: 100; }
.skip:focus { left: 1rem; top: 1rem; color: #fff; }

/* ---------- Üst bar ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.site-header.scrolled { border-bottom-color: var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 72px; gap: 1rem; }
.logo { display: flex; align-items: center; gap: .7rem; text-decoration: none; font-family: var(--serif); font-size: 1.3rem; font-weight: 600; color: var(--navy); }
.logo img { width: 40px; height: 40px; }
.main-nav { display: flex; gap: clamp(.9rem, 1.6vw, 1.6rem); }
.main-nav a { text-decoration: none; color: var(--ink); font-size: .95rem; font-weight: 500; padding: .4rem 0; border-bottom: 2px solid transparent; }
.main-nav a:hover, .main-nav a.active { color: var(--navy); border-bottom-color: var(--bronze); }
.menu-toggle { display: none; background: none; border: 0; width: 44px; height: 44px; cursor: pointer; padding: 10px; }
.menu-icon, .menu-icon::before, .menu-icon::after { display: block; width: 24px; height: 2px; background: var(--navy); position: relative; transition: transform .25s, background .25s; }
.menu-icon::before, .menu-icon::after { content: ""; position: absolute; left: 0; }
.menu-icon::before { top: -7px; } .menu-icon::after { top: 7px; }
.menu-toggle[aria-expanded="true"] .menu-icon { background: transparent; }
.menu-toggle[aria-expanded="true"] .menu-icon::before { transform: translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-icon::after { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 980px) {
  .menu-toggle { display: block; }
  .main-nav {
    position: fixed; inset: 72px 0 auto 0;
    flex-direction: column; gap: 0;
    background: var(--white); border-bottom: 1px solid var(--line);
    padding: .5rem clamp(1.25rem, 4vw, 2.5rem) 1.25rem;
    display: none; max-height: calc(100vh - 72px); overflow-y: auto;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: .85rem 0; border-bottom: 1px solid var(--line); font-size: 1.05rem; }
  .main-nav a:last-child { border-bottom: 0; }
}

/* ---------- Hero ---------- */
.hero { background: var(--paper); padding: clamp(3.5rem, 8vw, 6.5rem) 0 clamp(3.5rem, 7vw, 6rem); overflow: hidden; }
.hero-inner { display: grid; grid-template-columns: 1.25fr 1fr; gap: clamp(2rem, 5vw, 5rem); align-items: center; }
.kicker { font-weight: 600; color: var(--bronze-text); margin-bottom: 1.2rem; }
.hero h1 { font-size: clamp(2.4rem, 5.4vw, 4.4rem); line-height: 1.05; max-width: 14ch; margin-bottom: .45em; }
.lead { font-size: clamp(1.1rem, 1.6vw, 1.25rem); color: var(--muted); max-width: 56ch; }
.actions { display: flex; flex-wrap: wrap; gap: .8rem; margin: 2rem 0 1.5rem; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 0 1.6rem; font-weight: 600; text-decoration: none; border-radius: 4px; transition: background .2s, color .2s, border-color .2s; }
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { background: var(--navy-deep); color: #fff; }
.btn-ghost { border: 1.5px solid var(--navy); color: var(--navy); }
.btn-ghost:hover { background: var(--navy); color: #fff; }
.hero-note { color: var(--muted); font-size: .95rem; margin: 0; }
.hero-mark { display: flex; justify-content: center; }
.hero-mark img { width: min(100%, 440px); animation: assemble 1.4s cubic-bezier(.2, .8, .2, 1) both .15s; }
@keyframes assemble {
  from { opacity: 0; transform: rotate(-60deg) scale(.82); }
  to   { opacity: 1; transform: none; }
}
@media (max-width: 820px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-mark { display: none; }
}

/* ---------- Bölümler ---------- */
.section { padding: clamp(4rem, 8vw, 6.5rem) 0; }
.section.tint { background: var(--paper); }
.section-lead { color: var(--muted); font-size: 1.125rem; max-width: 62ch; margin-bottom: 2.5rem; }

.about-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1.5rem, 3vw, 3rem); margin-top: 1.5rem; }
.about-grid > div { border-top: 2px solid var(--navy); padding-top: 1.25rem; }
.about-grid > div:nth-child(2) { border-top-color: var(--bronze); }
.about-grid p { color: var(--muted); max-width: 60ch; }
.logo-story { display: flex; align-items: center; gap: clamp(1.25rem, 3vw, 2.5rem); margin: clamp(3rem, 6vw, 4.5rem) 0 0; padding: clamp(1.5rem, 3vw, 2rem); background: var(--paper); border-radius: 6px; }
.logo-story img { width: 110px; flex: none; }
.logo-story figcaption { font-family: var(--serif); font-size: clamp(1.1rem, 1.8vw, 1.3rem); line-height: 1.55; color: var(--ink); max-width: 68ch; }

.manifesto { background: var(--navy); color: #fff; padding: clamp(4rem, 9vw, 7rem) 0; }
.manifesto h2 { color: var(--bronze-light); font-size: 1.1rem; font-family: var(--sans); font-weight: 600; letter-spacing: 0; }
.manifesto blockquote { margin: 0; font-family: var(--serif); }
.manifesto blockquote p { font-size: clamp(1.3rem, 2.3vw, 1.7rem); line-height: 1.45; color: rgba(255, 255, 255, .86); margin-bottom: .9em; }
.manifesto blockquote p:first-child { font-size: clamp(1.8rem, 3.6vw, 2.7rem); line-height: 1.2; color: #fff; }
.manifesto blockquote p:last-child { color: var(--bronze-light); margin: 0; }

.vm-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 5rem); }
.vm h2 { font-size: 1.1rem; font-family: var(--sans); font-weight: 600; color: var(--bronze-text); letter-spacing: 0; }
.statement { font-family: var(--serif); font-size: clamp(1.35rem, 2.2vw, 1.7rem); line-height: 1.4; color: var(--navy); margin: 0; }

.roles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.role { background: var(--white); padding: 1.75rem; border-left: 4px solid var(--line); border-radius: 0 6px 6px 0; }
.role-navy { border-left-color: var(--navy); }
.role-bronze { border-left-color: var(--bronze); }
.role p { color: var(--muted); margin: 0; }

/* ---------- Vizyonerler (altıgen portreler) ---------- */
.people { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 2.75rem 1.5rem; }
.person { text-align: center; }
.hex { width: 148px; aspect-ratio: .866; margin: 0 auto 1.1rem; padding: 4px; clip-path: var(--hex); background: var(--navy); transition: background .25s; }
.hex-bronze { background: var(--bronze); }
.hex img, .hex .initials { width: 100%; height: 100%; object-fit: cover; clip-path: var(--hex); background: var(--paper); }
.hex .initials { display: flex; align-items: center; justify-content: center; font-family: var(--serif); font-size: 2.6rem; color: var(--navy); }
.person:hover .hex-navy { background: var(--bronze); }
.person:hover .hex-bronze { background: var(--navy); }
.person h3 { font-size: 1.12rem; margin-bottom: .3rem; }
.person h3 a { text-decoration: none; }
.person h3 a:hover { text-decoration: underline; }
.role-title { font-size: .92rem; color: var(--ink); margin: 0 0 .15rem; line-height: 1.4; }
.org { font-size: .88rem; color: var(--bronze-text); font-weight: 600; margin: 0; line-height: 1.4; }
.textlink { font-weight: 600; }

/* ---------- Etkinlikler ---------- */
.sub { font-size: 1.5rem; margin: 2rem 0 1.25rem; }
.events { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.75rem; }
.event { background: var(--white); border-radius: 6px; overflow: hidden; display: flex; flex-direction: column; border: 1px solid var(--line); }
.event-media { aspect-ratio: 16 / 9; background: var(--navy-deep); position: relative; }
.event-media > img, .event-media iframe { width: 100%; height: 100%; object-fit: cover; border: 0; display: block; }
.yt { all: unset; position: absolute; inset: 0; cursor: pointer; display: block; }
.yt img { width: 100%; height: 100%; object-fit: cover; }
.yt-play { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; background: rgba(13, 42, 60, .18); transition: background .2s; }
.yt-bg { fill: var(--navy); fill-opacity: .92; transition: fill .2s; }
.yt:hover .yt-play, .yt:focus-visible .yt-play { background: rgba(13, 42, 60, .05); }
.yt:hover .yt-bg, .yt:focus-visible .yt-bg { fill: #c4302b; fill-opacity: 1; }
.yt:focus-visible { outline: 3px solid var(--bronze); outline-offset: -3px; }
.event-placeholder { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; background: var(--paper); }
.event-body { padding: 1.5rem 1.6rem 1.75rem; }
.event-body h3 { font-size: 1.4rem; }
.event-body p { color: var(--muted); }
.event-date { font-size: .92rem; font-weight: 600; color: var(--bronze-text); margin-bottom: .5rem; }
.tag { display: inline-block; background: var(--navy); color: #fff; font-size: .78rem; padding: .1rem .55rem; border-radius: 3px; margin-left: .4rem; vertical-align: 1px; }
.empty { background: var(--white); border: 1px dashed var(--line); padding: 1.5rem; border-radius: 6px; max-width: 62ch; }

/* ---------- Yol haritası ---------- */
.roadmap { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; position: relative; }
.roadmap::before { content: ""; position: absolute; top: 14px; left: 0; right: 0; height: 2px; background: linear-gradient(to right, var(--navy) 0 25%, var(--bronze) 25% 50%, var(--line) 50%); }
.step { position: relative; padding-top: 3rem; }
.step::before { content: ""; position: absolute; top: 5px; left: 0; width: 20px; height: 23px; clip-path: var(--hex); background: var(--line); }
.step.is-now::before { background: var(--navy); }
.step.is-next::before { background: var(--bronze); }
.status { display: inline-block; font-size: .8rem; font-weight: 600; padding: .15rem .6rem; border-radius: 3px; background: var(--paper); color: var(--muted); margin-bottom: .75rem; }
.is-now .status { background: var(--navy); color: #fff; }
.is-next .status { background: var(--bronze-light); color: var(--navy-deep); }
.step p { color: var(--muted); margin: 0; }

.values { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; margin: 1.5rem 0 0; }
.values dt { font-family: var(--serif); font-size: 1.45rem; color: var(--navy); margin-bottom: .5rem; }
.values dd { margin: 0; color: var(--muted); }

/* ---------- Destekleyenler ---------- */
.supporters { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 1rem; }
.supporters li > a, .supporters li > div { display: flex; align-items: center; justify-content: center; height: 110px; padding: 1.25rem; background: var(--white); border: 1px solid var(--line); border-radius: 6px; text-decoration: none; transition: border-color .2s; }
.supporters li > a:hover { border-color: var(--bronze); }
.supporters img { max-height: 54px; width: auto; max-width: 100%; object-fit: contain; }
.sname { font-weight: 600; color: var(--navy); }
.supporter-join a { flex-direction: column; border-style: dashed !important; gap: .2rem; text-align: center; }
.supporter-join strong { color: var(--navy); }
.supporter-join span { font-size: .85rem; color: var(--muted); }

/* ---------- Sponsorlar ---------- */
.sponsors-section { background: linear-gradient(180deg, var(--paper) 0, var(--white) 100%); border-top: 4px solid var(--bronze); }
.sponsors { list-style: none; margin: 0 0 1.25rem; padding: 0; display: grid; gap: 1.25rem; }
.sponsors-main { grid-template-columns: 1fr; }
.sponsors-other { grid-template-columns: repeat(auto-fill, minmax(min(100%, 380px), 1fr)); }
.sponsor { display: flex; align-items: center; gap: 1.75rem; background: var(--white); border: 1px solid var(--line); border-radius: 8px; padding: 1.5rem 1.75rem; text-decoration: none; color: var(--ink); height: 100%; transition: border-color .2s, box-shadow .2s; }
a.sponsor:hover { border-color: var(--bronze); box-shadow: 0 10px 30px -18px rgba(21, 63, 88, .45); color: var(--ink); }
.sponsor-logo { flex: 0 0 130px; height: 70px; display: flex; align-items: center; justify-content: center; }
.sponsor-logo img { max-height: 70px; max-width: 100%; width: auto; object-fit: contain; }
.sponsor-text { display: flex; flex-direction: column; gap: .2rem; min-width: 0; }
.sponsor-tier { font-size: .82rem; font-weight: 600; color: var(--bronze-text); }
.sponsor-text strong { font-family: var(--serif); font-weight: 500; font-size: 1.3rem; color: var(--navy); }
.sponsor-desc { color: var(--muted); font-size: .95rem; }
.sponsors-main .sponsor { padding: clamp(1.75rem, 4vw, 2.75rem); border: 1.5px solid var(--bronze); gap: clamp(1.5rem, 4vw, 3.5rem); }
.sponsors-main .sponsor-logo { flex-basis: clamp(160px, 24vw, 280px); height: 110px; }
.sponsors-main .sponsor-logo img { max-height: 110px; }
.sponsors-main .sponsor-text strong { font-size: clamp(1.5rem, 2.6vw, 2rem); }
.sponsors-main .sponsor-desc { font-size: 1.05rem; max-width: 60ch; }
@media (max-width: 640px) {
  .sponsor, .sponsors-main .sponsor { flex-direction: column; align-items: flex-start; }
  .sponsor-logo, .sponsors-main .sponsor-logo { flex-basis: auto; justify-content: flex-start; height: 80px; }
  .sponsors-other { grid-template-columns: 1fr; }
}
.people-note { margin: 3rem 0 0; font-family: var(--serif); font-style: italic; font-size: 1.15rem; color: var(--muted); }

/* ---------- SSS ---------- */
.faq details { border-bottom: 1px solid var(--line); }
.faq details:first-child { border-top: 1px solid var(--line); }
.faq summary { cursor: pointer; list-style: none; padding: 1.2rem 2.5rem 1.2rem 0; font-family: var(--serif); font-size: 1.25rem; color: var(--navy); position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: .25rem; top: 50%; transform: translateY(-50%); font-family: var(--sans); font-size: 1.6rem; font-weight: 300; color: var(--bronze); transition: transform .2s; }
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq details p { color: var(--muted); padding-bottom: 1.2rem; margin: 0; max-width: 68ch; }

/* ---------- Alt bilgi ---------- */
.site-footer { background: var(--navy-deep); color: rgba(255, 255, 255, .75); padding: 3.5rem 0 1.5rem; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 2rem; flex-wrap: wrap; }
.footer-brand { display: flex; gap: 1rem; align-items: center; }
.footer-brand p { margin: 0; }
.fname { font-family: var(--serif); font-size: 1.35rem; color: #fff; }
.footer-links { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 1.5rem; }
.footer-links a { color: #fff; text-decoration: none; }
.footer-links a:hover { color: var(--bronze-light); text-decoration: underline; }
.copy { margin-top: 2.5rem; padding-top: 1.25rem; border-top: 1px solid rgba(255, 255, 255, .12); font-size: .88rem; padding-bottom: env(safe-area-inset-bottom, 0); }

/* ---------- Duyarlı ---------- */
@media (max-width: 980px) {
  .roles, .about-grid { grid-template-columns: 1fr; }
  .values { grid-template-columns: repeat(2, 1fr); }
  .roadmap { grid-template-columns: 1fr; gap: 0; }
  .roadmap::before { top: 0; bottom: 0; left: 9px; right: auto; width: 2px; height: auto; background: linear-gradient(to bottom, var(--navy) 0 25%, var(--bronze) 25% 50%, var(--line) 50%); }
  .step { padding: 0 0 2rem 2.5rem; }
  .step::before { top: 2px; }
}
@media (max-width: 720px) {
  .vm-grid, .events { grid-template-columns: 1fr; }
  .logo-story { flex-direction: column; align-items: flex-start; }
  .logo-story img { width: 80px; }
}
@media (max-width: 520px) {
  body { font-size: 1rem; }
  .values { grid-template-columns: 1fr; }
  .people { grid-template-columns: repeat(2, 1fr); gap: 2rem 1rem; }
  .hex { width: 120px; }
  .actions .btn { flex: 1 1 100%; }
  .supporters { grid-template-columns: repeat(2, 1fr); }
  .supporters li > a, .supporters li > div { height: 90px; padding: .9rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}