/* ==========================================================================
   Gürkan Sağlam — AI Dönüşüm Danışmanlığı
   Design tokens
   ========================================================================== */

:root{
  /* Color — cool, modern, tech-forward */
  --bg:        #F5F6FA;   /* soft cool white */
  --bg-alt:    #ECEEF6;   /* pale indigo-gray, section breaks */
  --panel:     #FFFFFF;   /* card surfaces */
  --ink:       #161A26;   /* cool near-black text */
  --ink-soft:  #545C70;   /* secondary text, slate */
  --ink-faint: #8A92A6;   /* tertiary / captions */
  --accent:    #4A5AF0;   /* vivid indigo — highlight, links */
  --accent-ink:#3A46CC;   /* darker indigo, for text-on-light use */
  --trust:     #121B33;   /* deep navy — the "trust" note */
  --trust-soft:#E7E9F6;   /* indigo tint for backgrounds */
  --line:      #E0E3EE;   /* hairline cool border */
  --line-soft: #ECEEF6;

  /* Type */
  --font-display: 'Fraunces', 'Iowan Old Style', serif;
  --font-body: 'Public Sans', -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;

  /* Scale */
  --step-0: clamp(1rem, 0.95rem + 0.2vw, 1.0625rem);
  --step-1: clamp(1.25rem, 1.15rem + 0.4vw, 1.5rem);
  --step-2: clamp(1.75rem, 1.5rem + 1vw, 2.25rem);
  --step-3: clamp(2.25rem, 1.8rem + 1.8vw, 3.25rem);
  --step-4: clamp(3rem, 2.2rem + 3vw, 4.75rem);

  --radius: 6px;
  --radius-lg: 14px;
  --maxw: 1160px;
}

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

html{ scroll-behavior: smooth; }

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

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

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

a{ color: var(--accent-ink); text-decoration: none; }
a:hover{ text-decoration: underline; }

h1, h2, h3{
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.12;
  margin: 0 0 0.5em;
  color: var(--ink);
  letter-spacing: -0.01em;
}
h1{ font-size: var(--step-4); font-weight: 500; }
h2{ font-size: var(--step-3); font-weight: 500; }
h3{ font-size: var(--step-1); font-weight: 600; }

p{ margin: 0 0 1.1em; color: var(--ink-soft); }

.eyebrow{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--accent-ink);
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
}
.eyebrow::before{
  content: "";
  width: 18px; height: 1px;
  background: currentColor;
  display: inline-block;
}

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

/* Constrains hero copy width WITHOUT re-centering it — keeps the left edge
   aligned with every other page's container, unlike max-width + margin:auto
   on the container itself (which shifts the whole block sideways). */
.hero-copy{ max-width: 70ch; }

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

/* ---------------------------------- Header --------------------------------- */
.site-header{
  position: sticky; top: 0; z-index: 40;
  background: rgba(250, 245, 236, 0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .container{
  display:flex; align-items:center; justify-content:space-between;
  padding-top: 18px; padding-bottom: 18px;
}
.brand{
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--ink);
}
.brand span{ color: var(--accent-ink); }

.nav-links{
  display:flex; align-items:center; gap: 28px;
  font-size: 0.94rem;
}
.nav-links a{
  color: var(--ink-soft);
  font-weight: 500;
}
.nav-links a:hover{ color: var(--ink); text-decoration: none; }
.nav-links a.active{ color: var(--ink); }
.nav-links a.cta{
  color: var(--panel);
  background: var(--trust);
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 0.88rem;
}
.nav-links a.cta:hover{ background: #26443b; text-decoration: none; }

.nav-toggle{ display:none; }

@media (max-width: 760px){
  .nav-links{
    position: fixed; inset: 64px 0 0 0;
    background: var(--bg);
    flex-direction: column;
    align-items: flex-start;
    padding: 28px;
    gap: 20px;
    transform: translateX(100%);
    transition: transform 0.28s ease;
  }
  .nav-links.open{ transform: translateX(0); }
  .nav-toggle{
    display:block; background:none; border:none;
    font-family: var(--font-mono); font-size: 0.85rem;
    color: var(--ink); cursor:pointer;
  }
}

/* ---------------------------------- Hero --------------------------------- */
.hero{
  padding: 88px 0 60px;
}
.hero-grid{
  display:grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items:center;
}
@media (max-width: 900px){
  .hero-grid{ grid-template-columns: 1fr; }
}
.hero h1{ margin-top: 0.4em; }
.hero .lede{
  font-size: 1.15rem;
  max-width: 46ch;
  color: var(--ink-soft);
}
.hero-actions{
  display:flex; gap:16px; margin-top: 28px; flex-wrap: wrap;
}

.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding: 13px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary{
  background: var(--trust);
  color: var(--panel);
}
.btn-primary:hover{ background: #26443b; text-decoration:none; }
.btn-ghost{
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}
.btn-ghost:hover{ border-color: var(--ink-faint); text-decoration:none; }

/* Route / compass signature */
.route-wrap{
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 22px 20px;
}
.route-wrap .route-caption{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}
.route-svg path.route-line{
  fill:none;
  stroke: var(--line);
  stroke-width: 2;
  stroke-dasharray: 6 7;
}
.route-svg .stop circle{
  fill: var(--panel);
  stroke: var(--ink-faint);
  stroke-width: 1.6;
}
.route-svg .stop.featured circle{
  fill: var(--trust);
  stroke: var(--trust);
}
.route-svg .stop.start circle{
  fill: var(--accent);
  stroke: var(--accent);
}
.route-svg text{
  font-family: var(--font-mono);
  font-size: 11.5px;
  fill: var(--ink-soft);
}
.route-svg text.stop-label-featured{ fill: var(--trust); font-weight: 700;}

/* ---------------------------------- Stat strip --------------------------------- */
.stat-strip{
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg-alt);
}
.stat-strip .container{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  padding: 30px 28px;
}
@media (max-width: 760px){
  .stat-strip .container{ grid-template-columns: repeat(2, 1fr); gap: 22px 0; }
}
.stat{
  padding: 0 22px;
  border-left: 1px solid var(--line);
}
.stat:first-child{ border-left: none; padding-left: 0; }
@media (max-width: 760px){
  .stat:nth-child(2n+1){ border-left: none; padding-left: 0; }
  .stat:nth-child(2n){ padding-left: 22px; }
}
.stat b{
  display:block;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--accent-ink);
  letter-spacing: -0.01em;
}
.stat span{
  font-size: 0.8rem;
  color: var(--ink-soft);
  line-height: 1.4;
}

/* ---------------------------------- Sections --------------------------------- */
section{ padding: 80px 0; }
.section-head{ max-width: 62ch; margin-bottom: 44px; }
.section-head h2{ margin-top: 0.4em; }
.section-alt{ background: var(--bg-alt); }

/* Service cards */
.services-grid{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
@media (max-width: 760px){ .services-grid{ grid-template-columns: 1fr; } }

.service-card{
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px 28px;
  position: relative;
}
.service-card.featured{
  border-color: var(--trust);
  box-shadow: 0 0 0 1px var(--trust) inset;
}
.service-card .tag{
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--trust);
  background: var(--trust-soft);
  padding: 4px 10px;
  border-radius: 999px;
  display:inline-block;
  margin-bottom: 14px;
}
.service-card h3{ margin-bottom: 0.4em; }
.service-card p{ margin-bottom: 0; font-size: 0.96rem; }

/* Process list */
.process-list{
  display:flex;
  flex-direction: column;
}
.process-item{
  display:grid;
  grid-template-columns: 90px 1fr;
  gap: 24px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}
.process-item:last-child{ border-bottom: 1px solid var(--line); }
.process-item .idx{
  font-family: var(--font-mono);
  color: var(--ink-faint);
  font-size: 0.85rem;
  padding-top: 4px;
}
.process-item h3{ margin-bottom: 0.3em; }
.process-item p{ margin-bottom: 0; }

/* Quote / trust block */
.trust-block{
  background: var(--trust);
  color: #EFEDE4;
  border-radius: var(--radius-lg);
  padding: 46px 40px;
}
.trust-block p{
  color: #D6D9F5;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-style: italic;
  font-weight: 400;
  max-width: 58ch;
  margin: 0;
}

/* Cards grid generic (sectors) */
.pill-row{ display:flex; flex-wrap:wrap; gap:10px; }
.pill{
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

/* Blog */
.post-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 900px){ .post-grid{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 620px){ .post-grid{ grid-template-columns: 1fr; } }

.post-card{
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 26px 24px;
  display:flex; flex-direction:column; height:100%;
}
.post-card .post-date{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}
.post-card h3{ font-size: 1.15rem; margin-bottom: 0.5em; }
.post-card p{ font-size: 0.92rem; flex-grow:1; }
.post-card .read-more{
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--trust);
  font-weight: 600;
}

/* Article */
.article-hero{ padding: 64px 0 20px; }
.article-hero .post-date{
  font-family: var(--font-mono); font-size: 0.78rem; color: var(--ink-faint);
  text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 16px;
}
.article-hero h1{ font-size: var(--step-3); max-width: 24ch; }
article.post-body{
  max-width: 68ch;
  padding-bottom: 60px;
}
article.post-body h2{ font-size: var(--step-1); margin-top: 1.6em; }
article.post-body p{ font-size: 1.02rem; }
article.post-body ul, article.post-body ol{ color: var(--ink-soft); padding-left: 1.3em; }
article.post-body li{ margin-bottom: 0.6em; }
.post-nav-back{
  font-family: var(--font-mono); font-size: 0.82rem; color: var(--ink-soft);
}

/* Contact */
.contact-card{
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align:center;
  max-width: 620px;
  margin: 0 auto;
}
.contact-card .mail-link{
  font-family: var(--font-display);
  font-size: var(--step-2);
  color: var(--accent-ink);
  display:inline-block;
  margin: 14px 0 8px;
  word-break: break-word;
}

/* Footer */
.site-footer{
  border-top: 1px solid var(--line);
  padding: 36px 0;
}
.site-footer .container{
  display:flex; justify-content: space-between; align-items:center; flex-wrap: wrap; gap: 14px;
}
.site-footer p{ margin:0; font-size: 0.85rem; color: var(--ink-faint); }
.footer-links{ display:flex; gap: 20px; font-size: 0.85rem; }
.footer-links a{ color: var(--ink-soft); }