/* Giyilebilir Sağlık Teknolojileri — sunum sitesi
   Tema: Georgia başlık, Arial gövde; kömür / krem / terracotta */

:root {
  --charcoal: #23262B;
  --cream: #F6F3EE;
  --card: #EBE6DD;
  --text: #4A4D52;
  --accent: #B4472F;
  --accent-on-dark: #E8947A;
  --muted-on-dark: #B9B4AA;
  --subtitle-on-dark: #D8D3C8;
  --source: #6B6A66;
  --panel-dark: #2C2F34;
  --bar-muted: #A7A299;
  --rule: rgba(35, 38, 43, 0.08);
  --font-serif: Georgia, "Times New Roman", Times, "Liberation Serif", "Noto Serif", serif;
  --font-sans: Arial, Helvetica, "Liberation Sans", sans-serif;
  --radius: 14px;
  --nav-h: 72px;
  --max: 1120px;
  --space: clamp(4.5rem, 8vw, 7.5rem);
  --gutter: clamp(1.25rem, 4vw, 2rem);
  --focus: 0 0 0 3px var(--cream), 0 0 0 5px var(--accent);
  --shadow-none: none;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: #8f3825;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 200;
  background: var(--charcoal);
  color: var(--cream);
  padding: 0.6rem 1rem;
  border-radius: 8px;
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

/* ---------- Layout ---------- */

.wrap {
  width: min(var(--max), 100% - var(--gutter) * 2);
  margin-inline: auto;
}

.section {
  padding: var(--space) 0;
}

.section h2 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(1.85rem, 3.2vw, 2.35rem);
  line-height: 1.2;
  color: var(--charcoal);
  margin: 0 0 1.25rem;
  letter-spacing: -0.01em;
}

.lead {
  font-size: clamp(1.1rem, 1.6vw, 1.375rem);
  line-height: 1.5;
  color: var(--charcoal);
  margin: 0 0 0.6rem;
  max-width: 46rem;
}

.lead-accent {
  font-size: clamp(1.1rem, 1.6vw, 1.375rem);
  line-height: 1.5;
  color: var(--accent);
  margin: 0 0 2.5rem;
  max-width: 46rem;
}

/* ---------- Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246, 243, 238, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--nav-h);
  gap: 1rem;
}

.logo {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--charcoal);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.logo:hover { color: var(--charcoal); }

.logo span {
  color: var(--accent);
  margin-left: 0.18em;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
  color: var(--charcoal);
}

.nav-toggle-bars {
  display: block;
  width: 22px;
  height: 2px;
  margin: 0 auto;
  background: currentColor;
  position: relative;
  border-radius: 1px;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
}

.nav-toggle-bars::before { top: -7px; }
.nav-toggle-bars::after { top: 7px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-bars {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after {
  top: 0;
  transform: rotate(-45deg);
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.15rem 0.1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a {
  display: inline-block;
  color: var(--text);
  text-decoration: none;
  font-size: 0.875rem;
  padding: 0.45rem 0.55rem;
  border-radius: 8px;
  white-space: nowrap;
}

.nav-list a:hover,
.nav-list a[aria-current="true"] {
  color: var(--accent);
}

.nav-list a[aria-current="true"] {
  font-weight: 700;
}

/* ---------- Hero ---------- */

.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: calc(100svh - var(--nav-h));
  background: var(--charcoal);
  color: var(--cream);
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(2.5rem, 6vw, 5rem) clamp(2rem, 5vw, 4.5rem);
}

.hero h1 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.35rem, 5.2vw, 3.75rem);
  line-height: 1.15;
  color: var(--cream);
  margin: 0 0 1.4rem;
  letter-spacing: -0.02em;
}

.hero .tagline {
  font-size: clamp(1.1rem, 1.8vw, 1.3rem);
  line-height: 1.5;
  color: var(--subtitle-on-dark);
  margin: 0 0 2.25rem;
  max-width: 28rem;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent-on-dark);
  text-decoration: none;
  font-size: 1rem;
  width: fit-content;
  border-bottom: 1px solid transparent;
}

.hero-cta:hover {
  color: var(--cream);
  border-bottom-color: currentColor;
}

.hero-cta svg {
  width: 18px;
  height: 18px;
}

.hero-visual {
  position: relative;
  min-height: 280px;
  overflow: hidden;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 55% 50%;
  position: absolute;
  inset: 0;
}

/* ---------- Cards ---------- */

.icon {
  width: 44px;
  height: 44px;
  color: var(--accent);
  display: block;
  margin-bottom: 1.1rem;
  flex-shrink: 0;
}

.icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.cards-4,
.cards-2,
.cards-3,
.cards-6 {
  display: grid;
  gap: 1.15rem;
}

.cards-4 { grid-template-columns: repeat(4, 1fr); }
.cards-2 { grid-template-columns: repeat(2, 1fr); }
.cards-3 { grid-template-columns: repeat(3, 1fr); }
.cards-6 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.6rem 1.5rem 1.55rem;
  min-width: 0;
}

.card h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.3rem;
  color: var(--charcoal);
  margin: 0 0 0.4rem;
  line-height: 1.25;
}

.card.card-sans h3,
.card-sans h3 {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.15rem;
}

.card p {
  margin: 0;
  color: var(--text);
  font-size: 0.98rem;
  line-height: 1.5;
}

/* ---------- Timeline ---------- */

.timeline {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 6.1rem;
  top: 0.35rem;
  bottom: 0.35rem;
  width: 1px;
  background: #d4cfc4;
}

.timeline li {
  display: grid;
  grid-template-columns: 5.4rem 1fr;
  gap: 2.1rem;
  padding: 0.85rem 0 0.85rem 0;
  position: relative;
}

.timeline .year {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: var(--accent);
  line-height: 1.4;
}

.timeline p {
  margin: 0;
  color: var(--charcoal);
  font-size: 1.1rem;
  line-height: 1.45;
  padding-top: 0.12rem;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: calc(6.1rem - 4px);
  top: 1.35rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--cream);
}

/* ---------- How it works ---------- */

.steps {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 0.75rem;
  align-items: stretch;
  margin-top: 2.25rem;
}

.step-arrow {
  display: flex;
  align-items: center;
  color: var(--accent);
  opacity: 0.7;
}

.step-arrow svg {
  width: 22px;
  height: 22px;
}

/* ---------- Measure / use ---------- */

.split {
  display: grid;
  grid-template-columns: 1fr 1px 1fr;
  gap: 0 3.5rem;
  margin-top: 2.25rem;
  align-items: start;
}

.split-rule {
  background: #d4cfc4;
  width: 1px;
  align-self: stretch;
}

.split h3 {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--accent);
  margin: 0 0 1.15rem;
}

.split ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.split li {
  color: var(--charcoal);
  font-size: 1.15rem;
  padding: 0.55rem 0;
  border-top: 1px solid rgba(35, 38, 43, 0.08);
}

.split li:last-child {
  padding-bottom: 0;
}

/* ---------- Numbers (dark band) ---------- */

.section-dark {
  background: var(--charcoal);
  color: var(--cream);
  padding: var(--space) 0 calc(var(--space) - 0.5rem);
}

.section-dark h2 {
  color: var(--cream);
  margin-bottom: 2rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  gap: 1.15rem;
}

.panel {
  background: var(--panel-dark);
  border-radius: var(--radius);
  padding: 1.4rem 1.5rem 1.3rem;
}

.panel h3 {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1rem;
  color: var(--cream);
  margin: 0 0 1.1rem;
}

.bar-row {
  display: grid;
  grid-template-columns: 3.2rem minmax(0, 1fr) minmax(9.2rem, auto);
  gap: 0.85rem;
  align-items: center;
  margin: 0.55rem 0;
}

.bar-year {
  color: var(--muted-on-dark);
  font-size: 0.92rem;
}

.bar-track {
  height: 14px;
  background: transparent;
  min-width: 0;
}

.bar {
  display: block;
  height: 14px;
  border-radius: 3px;
  background: var(--accent-on-dark);
}

.bar--muted {
  background: var(--bar-muted);
}

.bar-value {
  font-family: var(--font-serif);
  color: var(--cream);
  font-size: 1.05rem;
  white-space: nowrap;
}

.stat-stack {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.stat {
  background: var(--panel-dark);
  border-radius: var(--radius);
  padding: 1.15rem 1.5rem 1.2rem;
}

.stat .figure {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 4vw, 2.7rem);
  line-height: 1.1;
  color: var(--accent-on-dark);
  margin: 0 0 0.25rem;
}

.stat .label {
  margin: 0;
  color: var(--cream);
  font-size: 1rem;
}

.stat .src {
  margin: 0.15rem 0 0;
  color: var(--muted-on-dark);
  font-size: 0.8rem;
}

.stats-note {
  margin: 1.5rem 0 0;
  color: var(--muted-on-dark);
  font-size: 0.85rem;
  line-height: 1.5;
}

.stats-note a {
  color: var(--accent-on-dark);
}

.stats-note a:hover {
  color: var(--cream);
}

/* ---------- Highlight / study ---------- */

.highlight {
  margin-top: 1.5rem;
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.4rem 1.6rem 1.35rem 1.5rem;
  display: grid;
  grid-template-columns: 4px 1fr;
  gap: 0 1.15rem;
}

.highlight-bar {
  background: var(--accent);
  border-radius: 2px;
  grid-row: 1 / span 3;
}

.highlight h3 {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--accent);
  margin: 0 0 0.45rem;
}

.highlight p {
  margin: 0 0 0.55rem;
  color: var(--charcoal);
  font-size: 1.02rem;
  line-height: 1.55;
}

.highlight .src,
.src {
  margin: 0;
  color: var(--source);
  font-size: 0.82rem;
}

.highlight .src a,
.src a {
  color: inherit;
}

.highlight .src a:hover,
.src a:hover {
  color: var(--accent);
}

/* ---------- Sources ---------- */

.sources {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.25rem 3rem;
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  counter-reset: src;
}

.sources li {
  counter-increment: src;
  padding: 0.95rem 0;
  border-top: 1px solid rgba(35, 38, 43, 0.08);
  display: grid;
  grid-template-columns: 1.7rem 1fr;
  gap: 0.35rem 0.55rem;
  min-width: 0;
}

.sources li::before {
  content: counter(src) ".";
  color: var(--accent);
  font-size: 0.9rem;
  padding-top: 0.15rem;
}

.sources a.title {
  color: var(--charcoal);
  text-decoration: none;
  font-size: 0.98rem;
  line-height: 1.45;
}

.sources a.title:hover {
  color: var(--accent);
  text-decoration: underline;
}

.sources .url {
  grid-column: 2;
  color: var(--accent);
  font-size: 0.8rem;
  text-decoration: none;
  overflow-wrap: anywhere;
  word-break: break-word;
  line-height: 1.4;
}

.sources .url:hover {
  text-decoration: underline;
}

/* ---------- Footer ---------- */

.site-footer {
  background: var(--charcoal);
  color: var(--cream);
  padding: clamp(4rem, 8vw, 6.5rem) 0;
}

.site-footer h2 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.4rem, 5vw, 3.4rem);
  color: var(--cream);
  margin: 0 0 0.7rem;
  letter-spacing: -0.02em;
}

.site-footer p {
  margin: 0;
  color: var(--subtitle-on-dark);
  font-size: 1.1rem;
  max-width: 28rem;
}


/* ---------- v2 additions (yeni sunum) ---------- */

.eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-on-dark);
  margin: 0 0 1rem;
}

.tagline-label { color: var(--muted-on-dark); font-size: 0.95em; }

.card-center { text-align: center; }
.card-center .icon { margin-inline: auto; width: 52px; height: 52px; }
.card-center h3 { margin: 0; }

.steps-5 {
  list-style: none;
  margin: 2.25rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.15rem;
}

.steps-5 li { display: flex; flex-direction: column; gap: 0.9rem; }

.step-num {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  display: grid;
  place-items: center;
  font-size: 1.05rem;
}

.types-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.42fr);
  gap: 1.15rem;
  margin-top: 2rem;
  align-items: stretch;
}

.cards-types {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.15rem;
}

.cards-types h3 { color: var(--accent); }

.photo-stack {
  display: grid;
  grid-template-rows: 1fr 1fr;
  gap: 1.15rem;
  min-height: 0;
}

.photo-stack img,
.media-split img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}

.media-split {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 3rem;
  align-items: center;
  margin-top: 2rem;
}

.media-split img { aspect-ratio: 4 / 3; height: auto; }

.plain-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.plain-list li {
  color: var(--charcoal);
  font-size: 1.12rem;
  padding: 0.8rem 0 0.8rem 1.4rem;
  border-top: 1px solid var(--rule);
  position: relative;
}

.plain-list li:first-child { border-top: 0; }

.plain-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.35rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

.icon-list {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem 2.5rem;
}

.icon-list--single { grid-template-columns: 1fr; max-width: 52rem; }

.icon-list li {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 1rem;
  align-items: center;
  color: var(--charcoal);
  font-size: 1.1rem;
  line-height: 1.45;
  padding: 0.35rem 0;
}

.icon-dot {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: var(--card);
  color: var(--accent);
  display: grid;
  place-items: center;
}

.icon-dot svg { width: 1.6rem; height: 1.6rem; }

.footer-authors {
  margin-top: 1.5rem !important;
  color: var(--accent-on-dark) !important;
  font-size: 1rem !important;
}

@media (max-width: 960px) {
  .steps-5 { grid-template-columns: 1fr; }
  .steps-5 li { flex-direction: row; align-items: center; }
  .step-num { flex-shrink: 0; }
  .types-layout { grid-template-columns: 1fr; }
  .photo-stack { grid-template-rows: none; grid-template-columns: 1fr 1fr; }
  .photo-stack img { aspect-ratio: 4 / 3; height: auto; }
  .media-split { grid-template-columns: 1fr; gap: 2rem; }
  .icon-list { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .cards-types { grid-template-columns: 1fr; }
  .icon-list li { font-size: 1.02rem; }
}

/* ---------- Responsive ---------- */

@media (max-width: 960px) {
  .nav-toggle { display: block; }

  .nav-list {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: var(--nav-h);
    background: var(--cream);
    border-bottom: 1px solid var(--rule);
    flex-direction: column;
    flex-wrap: nowrap;
    padding: 0.5rem var(--gutter) 1.25rem;
    gap: 0;
  }

  .nav-list.is-open { display: flex; }

  .nav-list a {
    display: block;
    padding: 0.75rem 0.25rem;
    font-size: 1rem;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .hero-visual {
    min-height: 0;
    height: min(52vw, 360px);
    order: -1;
  }

  .hero-visual img { position: absolute; }

  .cards-4 { grid-template-columns: repeat(2, 1fr); }
  .cards-6 { grid-template-columns: repeat(2, 1fr); }

  .timeline::before { left: 5.5rem; }
  .timeline li { grid-template-columns: 4.8rem 1fr; gap: 1.6rem; }
  .timeline li::before { left: calc(5.5rem - 4px); }

  .steps {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .step-arrow {
    justify-content: center;
    transform: rotate(90deg);
    height: 1rem;
  }

  .split {
    grid-template-columns: 1fr;
    gap: 2.25rem;
  }

  .split-rule { display: none; }

  .stats-grid { grid-template-columns: 1fr; }

  .sources { grid-template-columns: 1fr; gap: 0; }
}

@media (max-width: 560px) {
  .cards-4,
  .cards-2,
  .cards-3,
  .cards-6 {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    padding: 2.25rem 1.35rem 2.75rem;
  }

  .timeline::before { display: none; }
  .timeline li {
    grid-template-columns: 1fr;
    gap: 0.15rem;
    padding: 1rem 0;
    border-top: 1px solid rgba(35, 38, 43, 0.08);
  }
  .timeline li::before { display: none; }
  .timeline li:first-child { border-top: 0; }

  .bar-row {
    grid-template-columns: 3rem 1fr;
    grid-template-rows: auto auto;
  }
  .bar-value {
    grid-column: 2;
    white-space: normal;
  }
  .bar-track { grid-column: 2; }

  .highlight {
    padding: 1.2rem 1.15rem 1.2rem 1.1rem;
  }
}

@media (min-width: 961px) and (max-width: 1180px) {
  .nav-list a { padding: 0.45rem 0.4rem; font-size: 0.8125rem; }
}

/* ---------- v2 overrides ---------- */
.timeline::before { left: 8.6rem; }
.timeline li { grid-template-columns: 7.9rem 1fr; }
.timeline li::before { left: calc(8.6rem - 4px); }
.sources li { align-content: start; }

@media (max-width: 960px) {
  .timeline::before { left: 8.1rem; }
  .timeline li { grid-template-columns: 7.4rem 1fr; gap: 1.6rem; }
  .timeline li::before { left: calc(8.1rem - 4px); }
}

@media (max-width: 560px) {
  .cards-4.cards-measure { grid-template-columns: repeat(2, 1fr); gap: 0.8rem; }
  .cards-measure .card { padding: 1.2rem 0.8rem; }
  .cards-measure h3 { font-size: 1rem; }
  .timeline li { grid-template-columns: 1fr; gap: 0.15rem; }
}