/* ============================================================
   ROSS Business Solutions — DESIGN.md uygulaması
   Editoryal serif + sans · düz yüzeyler · hairline çizgiler
   ============================================================ */

:root {
  /* Renkler — marka */
  --color-ross-red: #d3232c;
  --color-ross-navy: #263f84;
  --color-white: #ffffff;

  /* Renkler — türetilmiş */
  --color-navy-ink: #10182e;
  --color-ink: #151a26;
  --color-slate: #5a6072;
  --color-hairline: #e4e7ef;
  --color-mist: #f5f6fa;
  --color-navy-wash: #eceff7;
  --color-red-deep: #b01d25;
  --color-navy-deep: #1b2d61;
  --color-success: #2e7d5b;
  --color-success-wash: #ecf5f0;
  --color-navy-scrim: rgba(16, 24, 46, 0.55);
  --gradient-brand: linear-gradient(90deg, #d3232c, #263f84);

  /* Tipografi */
  --font-display: 'Fraunces', 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;

  /* Yerleşim */
  --page-max-width: 1200px;
  --radius-card: 10px;
  --radius-button: 999px;
  --radius-input: 10px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: var(--color-ross-navy); text-decoration: none; }
a:hover { color: var(--color-ross-red); }
ul, ol { list-style: none; }
button { font: inherit; cursor: pointer; background: none; border: none; }

:focus-visible {
  outline: 2px solid var(--color-ross-navy);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection { background: var(--color-navy-wash); color: var(--color-navy-deep); }

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

/* ---------- Tipografi rolleri ---------- */
.display, .heading-lg, .heading, .heading-sm {
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--color-ink);
}
.display {
  font-size: clamp(40px, 5.6vw, 72px);
  line-height: 1.05;
  letter-spacing: -0.03em;
}
.heading-lg {
  font-size: clamp(34px, 4.4vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.025em;
}
.heading {
  font-size: clamp(30px, 3.6vw, 44px);
  line-height: 1.12;
  letter-spacing: -0.02em;
}
.heading-sm {
  font-size: clamp(22px, 2.4vw, 28px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 500;
}
.lead {
  font-size: 18px;
  line-height: 1.6;
  color: var(--color-slate);
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ross-red);
}

/* İmza öğe: marka gradyan çizgisi */
.grad-rule {
  display: block;
  width: 120px;
  height: 2px;
  background: var(--gradient-brand);
  border: none;
  margin: 0 0 28px;
}

/* ---------- Butonlar ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--radius-button);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.2;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-ross-red);
  color: var(--color-white);
}
.btn-primary:hover { background: var(--color-red-deep); color: var(--color-white); }

.btn-ghost {
  background: transparent;
  border: 1px solid var(--color-ross-navy);
  color: var(--color-ross-navy);
}
.btn-ghost:hover { background: var(--color-ross-navy); color: var(--color-white); }

.band-dark .btn-ghost {
  border-color: rgba(255, 255, 255, 0.6);
  color: var(--color-white);
}
.band-dark .btn-ghost:hover { background: var(--color-white); color: var(--color-navy-ink); border-color: var(--color-white); }

.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
  font-size: 15px;
  color: var(--color-ross-navy);
}
.arrow-link .arrow { transition: transform 160ms ease; }
.arrow-link:hover { color: var(--color-ross-red); }
.arrow-link:hover .arrow { transform: translateX(4px); }

/* ---------- Üst navigasyon ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-hairline);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 72px;
}
.logo { display: flex; flex-direction: column; line-height: 1; gap: 3px; }
.logo-word {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 27px;
  letter-spacing: 0.01em;
}
.logo-ro { color: var(--color-ross-red); }
.logo-ss { color: var(--color-ross-navy); }
.logo-sub {
  font-size: 8.5px;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--color-slate);
}
.logo:hover .logo-ro { color: var(--color-red-deep); }

.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
}
.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink);
  padding: 6px 0;
  position: relative;
}
.nav-link:hover { color: var(--color-ross-navy); }
.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--color-ross-red);
}

.nav-item { position: relative; }
.dropdown {
  position: absolute;
  top: calc(100% + 14px);
  left: -20px;
  min-width: 320px;
  background: var(--color-white);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-card);
  padding: 10px;
  display: none;
  z-index: 60;
}
.dropdown::before {
  content: "";
  position: absolute;
  top: -16px; left: 0; right: 0;
  height: 16px;
}
.nav-item:hover .dropdown,
.nav-item:focus-within .dropdown { display: block; }
.dropdown a {
  display: block;
  padding: 11px 14px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink);
}
.dropdown a:hover { background: var(--color-mist); color: var(--color-ross-navy); }

.lang { font-size: 13px; font-weight: 500; color: var(--color-ink); }
.lang-off { color: var(--color-slate); opacity: 0.55; }
.btn-nav { padding: 10px 20px; font-size: 13.5px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  align-items: center;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  transition: transform 200ms ease, opacity 200ms ease;
}
.nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* ---------- Koyu bantlar (hero + footer) ---------- */
.band-dark {
  position: relative;
  background: var(--color-navy-ink);
  color: var(--color-white);
}
.band-dark::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: var(--gradient-brand);
}
.band-dark .display,
.band-dark .heading-lg,
.band-dark .heading,
.band-dark .heading-sm { color: var(--color-white); }
.band-dark .lead { color: rgba(255, 255, 255, 0.75); }
.band-dark .eyebrow { color: rgba(255, 255, 255, 0.8); }

.hero { padding: 110px 0 88px; }
.hero-sub { padding: 88px 0 72px; }
.hero-copy { max-width: 780px; }
.hero-copy .lead { margin-top: 24px; max-width: 640px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 40px; }

/* Ana sayfa hero: içindekiler indeksi */
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 4.4fr);
  gap: 72px;
  align-items: center;
}
.hero-index { border-top: 1px solid rgba(255, 255, 255, 0.22); }
.hero-index a {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  align-items: baseline;
  gap: 14px;
  padding: 19px 4px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
  color: var(--color-white);
}
.hero-index .idx-num {
  font-family: var(--font-display);
  font-size: 16px;
  color: var(--color-ross-red);
  filter: brightness(1.35);
}
.hero-index .idx-name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.25;
}
.hero-index .arrow { opacity: 0; transition: opacity 160ms ease, transform 160ms ease; color: rgba(255,255,255,.85); }
.hero-index a:hover { background: rgba(255, 255, 255, 0.05); }
.hero-index a:hover .arrow { opacity: 1; transform: translateX(3px); }
.hero-index-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 12px;
}

/* ---------- Bölümler ---------- */
.section { padding: 96px 0; }
.section-alt { background: var(--color-mist); }
.section-head { max-width: 760px; margin-bottom: 56px; }
.section-head .lead { margin-top: 20px; }
.section-head--center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head--center .grad-rule { margin-left: auto; margin-right: auto; }

/* ---------- İstatistik / kanıt bandı ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px 32px;
}
.stat-grid--5 { grid-template-columns: repeat(5, 1fr); }
.stat-num {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(26px, 2.6vw, 34px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-ross-navy);
  margin-bottom: 10px;
}
.stat p { font-size: 14.5px; color: var(--color-slate); line-height: 1.5; }

/* ---------- Kartlar ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.card {
  background: var(--color-white);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-card);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color 180ms ease;
}
.card:hover { border-color: var(--color-ross-navy); }
.card-num {
  font-family: var(--font-display);
  font-size: 17px;
  color: var(--color-ross-red);
}
.card h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 25px;
  line-height: 1.22;
  letter-spacing: -0.015em;
}
.card p { font-size: 15px; color: var(--color-slate); flex: 1; }
.card .arrow-link { margin-top: 6px; }

/* ---------- Satır listeleri (bold başlangıçlı maddeler) ---------- */
.list-rows { border-top: 1px solid var(--color-hairline); }
.list-rows li {
  padding: 20px 0;
  border-bottom: 1px solid var(--color-hairline);
  font-size: 16px;
  color: var(--color-slate);
  line-height: 1.6;
}
.list-rows strong { color: var(--color-ink); font-weight: 600; }

/* İki sütunlu içerik ---------- */
.split {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 64px;
  align-items: start;
}
.split-head { position: sticky; top: 104px; }
.split-head .lead { margin-top: 18px; }

/* ---------- Metodoloji adımları (gradyan iplik) ---------- */
.steps { position: relative; max-width: 720px; }
.steps::before {
  content: "";
  position: absolute;
  left: 23px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, #d3232c, #263f84);
}
.steps li {
  position: relative;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 22px;
  padding: 18px 0;
}
.step-num {
  position: relative;
  z-index: 1;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  background: var(--color-white);
  border: 1px solid var(--color-hairline);
  border-radius: 50%;
  font-family: var(--font-display);
  font-size: 19px;
  color: var(--color-ross-red);
}
.section-alt .step-num { background: var(--color-mist); }
.step-body strong {
  display: block;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 16px;
  color: var(--color-ross-navy);
  margin: 12px 0 4px;
}
.step-body p { font-size: 14.5px; color: var(--color-slate); }

/* ---------- Paneller ve alıntılar ---------- */
.panel {
  background: var(--color-navy-wash);
  border-radius: var(--radius-card);
  padding: 44px 40px;
}
.panel-cta {
  display: grid;
  grid-template-columns: minmax(0, 8fr) auto;
  gap: 32px;
  align-items: center;
  padding: 52px 48px;
}
.panel-cta .lead { margin-top: 14px; }

.quote {
  background: var(--color-navy-wash);
  border-radius: var(--radius-card);
  padding: 36px 40px;
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(19px, 2vw, 22px);
  line-height: 1.45;
  letter-spacing: -0.01em;
  color: var(--color-navy-deep);
}

/* ---------- Kurucu profilleri ---------- */
.profile {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: 64px;
  align-items: start;
}
.portrait {
  aspect-ratio: 4 / 5;
  background: var(--color-navy-wash);
  border-radius: var(--radius-card);
  display: grid;
  place-items: center;
  position: sticky;
  top: 104px;
}
.portrait span {
  font-family: var(--font-display);
  font-size: 72px;
  color: var(--color-ross-navy);
  opacity: 0.25;
}
.portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
  border-radius: var(--radius-card);
}
.profile-body > * + * { margin-top: 22px; }
.profile-body h2 { margin-bottom: 4px; }
.profile-role {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ross-red);
}
.profile-body p { color: var(--color-slate); font-size: 16px; }
.profile-meta { font-size: 14.5px; }
.profile-meta strong { color: var(--color-ink); }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-list li {
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-button);
  padding: 7px 15px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--color-navy-deep);
  background: var(--color-white);
}

/* ---------- Form ---------- */
.form-grid { display: grid; gap: 20px; }
.field label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 7px;
  color: var(--color-ink);
}
.field .req { color: var(--color-ross-red); }
.field input, .field textarea {
  width: 100%;
  background: var(--color-white);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-input);
  padding: 13px 16px;
  font-family: var(--font-sans);
  font-size: 16px;
  color: var(--color-ink);
  transition: border-color 160ms ease;
}
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--color-ross-navy);
}
.field textarea { min-height: 150px; resize: vertical; }
.field input.error, .field textarea.error { border-color: var(--color-red-deep); }
.field-error { font-size: 13.5px; color: var(--color-red-deep); margin-top: 6px; display: none; }
.form-note { font-size: 14px; color: var(--color-slate); }
.form-success {
  display: none;
  background: var(--color-success-wash);
  border-radius: var(--radius-card);
  padding: 24px 28px;
  color: var(--color-success);
  font-size: 16px;
  line-height: 1.55;
}
.form-success.visible { display: block; }

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 4.6fr);
  gap: 64px;
  align-items: start;
}
.contact-aside > * + * { margin-top: 28px; }
.contact-aside .panel h2 { margin-bottom: 10px; }
.contact-aside .panel p { color: var(--color-slate); font-size: 15px; margin-bottom: 20px; }
.channel-list li { padding: 14px 0; border-bottom: 1px solid var(--color-hairline); font-size: 15px; }
.channel-list li:first-child { border-top: 1px solid var(--color-hairline); }
.channel-list strong { color: var(--color-ink); font-weight: 600; }

/* ---------- Yayın kartları ---------- */
.pub-card {
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-card);
  padding: 40px 36px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: border-color 180ms ease;
  background: var(--color-white);
}
.pub-card:hover { border-color: var(--color-ross-navy); }
.pub-kicker {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ross-red);
}
.pub-card h2 { font-size: clamp(24px, 2.4vw, 30px); }
.pub-card p { color: var(--color-slate); font-size: 15.5px; flex: 1; }
.pub-card--with-cover {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 28px;
}
.pub-cover {
  width: 170px;
  max-width: 170px;
  flex: 0 0 170px;
  aspect-ratio: 3 / 4;
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--color-navy-wash);
}
.pub-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.pub-body { display: flex; flex-direction: column; gap: 16px; flex: 1 1 auto; min-width: 0; }
.pub-body p { color: var(--color-slate); font-size: 15.5px; flex: 1; }
.pub-links { display: flex; flex-direction: column; gap: 12px; margin-top: 4px; }
.pub-links .arrow-link:first-child { color: var(--color-ross-red); }
.pub-links .arrow-link:first-child:hover { color: var(--color-red-deep); }

.pillar-list { counter-reset: pillar; max-width: 720px; }
.pillar-list li {
  counter-increment: pillar;
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-hairline);
  align-items: baseline;
}
.pillar-list li::before {
  content: counter(pillar);
  font-family: var(--font-display);
  font-size: 26px;
  color: var(--color-ross-red);
  line-height: 1;
}
.pillar-list strong { color: var(--color-ink); font-weight: 600; }
.pillar-list li { color: var(--color-slate); font-size: 15.5px; }

/* ---------- Footer ---------- */
.site-footer {
  position: relative;
  background: var(--color-navy-ink);
  color: rgba(255, 255, 255, 0.7);
  margin-top: 0;
}
.site-footer a { color: rgba(255, 255, 255, 0.75); }
.site-footer a:hover { color: var(--color-white); }
.site-footer::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient-brand);
}
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 4fr) minmax(0, 3fr);
  gap: 48px;
  padding: 72px 0 48px;
}
.site-footer .logo-word { font-size: 30px; }
.site-footer .logo-ro { color: #e9575e; }
.site-footer .logo-ss { color: #8fa3dd; }
.site-footer .logo-sub { color: rgba(255, 255, 255, 0.55); }
.footer-tagline { margin-top: 14px; font-size: 14px; }
.footer-col h4 {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 16px;
}
.footer-col a { color: rgba(255, 255, 255, 0.75); font-size: 14px; }
.footer-col a:hover { color: var(--color-white); }
.footer-col li { padding: 5px 0; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 24px 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- Görünüm animasyonu ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 600ms ease, transform 600ms ease;
}
[data-reveal].revealed { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  .btn, .arrow-link .arrow, .card { transition: none; }
}

/* ---------- Duyarlı ---------- */
@media (max-width: 1020px) {
  .hero-grid { grid-template-columns: 1fr; gap: 56px; }
  .stat-grid, .stat-grid--5 { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .split-head, .portrait { position: static; }
  .profile { grid-template-columns: 1fr; gap: 36px; }
  .portrait { max-width: 340px; }
  .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .panel-cta { grid-template-columns: 1fr; }
  .btn-nav { display: none; }
}

@media (max-width: 820px) {
  .section { padding: 64px 0; }
  .hero { padding: 80px 0 64px; }
  .hero-sub { padding: 64px 0 56px; }
  .card-grid { grid-template-columns: 1fr; }
  .stat-grid, .stat-grid--5 { grid-template-columns: 1fr 1fr; gap: 32px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; padding: 56px 0 40px; }

  .nav-toggle { display: flex; }
  .site-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0; right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-hairline);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 24px 28px;
    gap: 4px;
  }
  .site-nav.open { display: flex; }
  .nav-link { font-size: 16px; padding: 10px 0; }
  .dropdown {
    position: static;
    display: block;
    border: none;
    padding: 0 0 4px 16px;
    min-width: 0;
  }
  .dropdown a { padding: 8px 0; color: var(--color-slate); }
  .lang { padding: 10px 0; }
  .btn-nav { display: inline-flex; margin-top: 10px; }
}

@media (max-width: 520px) {
  .stat-grid, .stat-grid--5 { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .panel, .panel-cta, .pub-card { padding: 28px 24px; }
  .pub-card--with-cover { flex-direction: column; }
  .pub-cover { width: 150px; max-width: 150px; flex: 0 0 auto; }
}