@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;1,9..40,400&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #F2EFEB;
  --bg-card: #FFFFFF;
  --text: #1a1a1a;
  --text-secondary: #5a5a5a;
  --text-light: #6E6D6C;
  --accent: #4A5568;
  --accent-light: #EDF0F4;
  --border: #E8E4E0;
  --heading: 'Inter', -apple-system, sans-serif;
  --sans: 'DM Sans', -apple-system, sans-serif;
  --max-width: 720px;
  --max-width-wide: 1080px;
}

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.7;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent); color: white; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; transition: opacity 0.2s ease; }
a:hover { opacity: 0.7; }

h1, h2, h3, h4 { font-family: var(--heading); font-weight: 600; letter-spacing: -0.02em; }
h1 { font-size: clamp(2rem, 4.5vw, 2.8rem); line-height: 1.2; margin-bottom: 0.5em; }
h2 { font-size: clamp(1.4rem, 2.8vw, 1.75rem); line-height: 1.3; margin-top: 2.5em; margin-bottom: 0.6em; }
h3 { font-size: 1.1rem; font-weight: 600; line-height: 1.35; margin-top: 2em; margin-bottom: 0.5em; }
p { margin-bottom: 1.2em; }
strong { font-weight: 600; }
hr { border: none; border-top: 1px solid var(--border); margin: 3em 0; }

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

.site-header {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.85);
}
.site-header .container { max-width: var(--max-width-wide); display: flex; justify-content: space-between; align-items: center; }
.site-header__name { font-family: var(--heading); font-size: 1.2rem; font-weight: 600; color: var(--text); text-decoration: none; letter-spacing: -0.01em; }
.site-header__name:hover { opacity: 1; color: var(--accent); }
.site-header__nav { display: flex; gap: 28px; list-style: none; }
.site-header__nav a { font-size: 0.9rem; font-weight: 500; color: var(--text-secondary); letter-spacing: 0.01em; }
.site-header__nav a:hover { color: var(--text); opacity: 1; }

.hero { padding: 80px 0 60px; }
.hero__intro { font-family: var(--heading); font-weight: 600; font-size: clamp(1.7rem, 3.8vw, 2.5rem); line-height: 1.3; max-width: 680px; color: var(--text); letter-spacing: -0.02em; }
.hero__intro em { font-style: normal; color: var(--accent); }
.hero__sub { margin-top: 24px; font-size: 1.05rem; color: var(--text-secondary); max-width: 560px; line-height: 1.7; }

.work-section { padding: 0 0 80px; }
.work-section__label { font-family: var(--heading); font-size: 0.78rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-light); margin-bottom: 32px; }

.case-study-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }

.case-study-card {
  background: var(--bg-card); border-radius: 12px; overflow: hidden;
  border: 1px solid var(--border); transition: transform 0.3s ease, box-shadow 0.3s ease;
  text-decoration: none; color: var(--text); display: flex; flex-direction: column;
}
.case-study-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,0.08); opacity: 1; }

.case-study-card__image { width: 100%; aspect-ratio: 16/10; background: var(--accent-light); display: flex; align-items: center; justify-content: center; overflow: hidden; position: relative; }
.case-study-card__image img { width: 100%; height: 100%; object-fit: cover; }
.case-study-card__image-placeholder { font-family: var(--heading); font-size: 0.9rem; color: var(--accent); opacity: 0.4; }

.case-study-card__content { padding: 24px 24px 28px; flex: 1; display: flex; flex-direction: column; }
.case-study-card__meta { font-family: var(--heading); font-size: 0.75rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-light); margin-bottom: 8px; }
.case-study-card__title { font-family: var(--heading); font-size: 1.2rem; font-weight: 600; line-height: 1.3; margin-bottom: 10px; letter-spacing: -0.01em; }
.case-study-card__desc { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.6; flex: 1; }
.case-study-card__read { margin-top: 16px; font-size: 0.85rem; font-weight: 500; color: var(--accent); display: inline-flex; align-items: center; gap: 6px; }
.case-study-card__read::after { content: '\2192'; transition: transform 0.2s ease; }
.case-study-card:hover .case-study-card__read::after { transform: translateX(4px); }

.case-study-header { padding: 60px 0 40px; }
.case-study-header__back { font-family: var(--heading); font-size: 0.85rem; font-weight: 500; color: var(--text-light); display: inline-flex; align-items: center; gap: 6px; margin-bottom: 32px; }
.case-study-header__back::before { content: '\2190'; }
.case-study-header__back:hover { color: var(--text); opacity: 1; }
.case-study-header__meta { display: flex; flex-wrap: wrap; gap: 24px; margin-top: 24px; padding-top: 24px; border-top: 1px solid var(--border); }
.case-study-header__meta-item { font-size: 0.85rem; }
.case-study-header__meta-label { font-family: var(--heading); color: var(--text-light); display: block; margin-bottom: 2px; font-size: 0.72rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; }
.case-study-header__meta-value { color: var(--text); }

.case-study-body { padding-bottom: 80px; }
.case-study-body h2 { margin-top: 3em; }
.case-study-body h2:first-child { margin-top: 0; }
.case-study-body h3 { font-family: var(--heading); font-weight: 600; font-size: 1rem; margin-top: 2em; }
.case-study-body blockquote { border-left: 3px solid var(--accent); padding-left: 20px; margin: 1.5em 0; font-size: 1.05rem; line-height: 1.6; color: var(--text-secondary); font-style: italic; }

/* --- Image Upload Slots --- */
.image-slot { width: 100%; margin: 2em 0; position: relative; }
.image-slot input[type="file"] { display: none; }

.image-slot__upload {
  width: 100%; aspect-ratio: 16/9;
  background: var(--accent-light); border-radius: 8px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px;
  border: 2px dashed var(--border); cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.image-slot__upload:hover { border-color: var(--accent); background: #E5E9EE; }
.image-slot__upload.hidden { display: none; }

.image-slot__upload-icon {
  width: 40px; height: 40px; border-radius: 50%; background: var(--accent);
  display: flex; align-items: center; justify-content: center;
}
.image-slot__upload-icon svg { width: 18px; height: 18px; stroke: white; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.image-slot__upload-label { font-family: var(--heading); font-size: 0.85rem; font-weight: 500; color: var(--accent); }
.image-slot__upload-dims { font-size: 0.72rem; color: var(--text-light); font-family: var(--heading); }
.image-slot__upload-hint { font-size: 0.72rem; color: var(--text-light); margin-top: 2px; }

.image-slot__preview { width: 100%; border-radius: 8px; display: none; cursor: pointer; }
.image-slot__preview.visible { display: block; }
.image-slot__preview:hover { opacity: 0.9; }

/* --- Metrics --- */
.metrics-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 2em 0; }
.metric-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px; padding: 24px; text-align: center; }
.metric-card__number { font-family: var(--heading); font-size: 2rem; font-weight: 700; color: var(--accent); line-height: 1.1; margin-bottom: 6px; letter-spacing: -0.02em; }
.metric-card__label { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.4; }

.site-footer { padding: 40px 0; border-top: 1px solid var(--border); text-align: center; }
.site-footer__copy { font-size: 0.8rem; color: var(--text-light); }

.case-study-nav { display: flex; justify-content: space-between; gap: 20px; padding: 40px 0; border-top: 1px solid var(--border); margin-top: 40px; }
.case-study-nav__link { font-size: 0.85rem; color: var(--text-secondary); display: flex; flex-direction: column; gap: 4px; }
.case-study-nav__link:hover { color: var(--text); opacity: 1; }
.case-study-nav__link--next { text-align: right; margin-left: auto; }
.case-study-nav__direction { font-family: var(--heading); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-light); }
.case-study-nav__title { font-family: var(--heading); font-size: 1rem; font-weight: 500; color: var(--text); }

.about-section { padding: 60px 0 80px; border-top: 1px solid var(--border); }
.about-section__content { display: grid; grid-template-columns: 1fr 2fr; gap: 48px; align-items: start; }
.about-section__photo { width: 100%; aspect-ratio: 1; background: var(--accent-light); border-radius: 10px; overflow: hidden; }
.about-section__photo img { width: 100%; height: 100%; object-fit: cover; }
.about-section__text h2 { margin-top: 0; }
.about-section__text p { color: var(--text-secondary); }

@keyframes fadeUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.animate-in { animation: fadeUp 0.6s ease forwards; opacity: 0; }
.animate-in:nth-child(1) { animation-delay: 0.1s; }
.animate-in:nth-child(2) { animation-delay: 0.2s; }
.animate-in:nth-child(3) { animation-delay: 0.3s; }
.animate-in:nth-child(4) { animation-delay: 0.35s; }
.animate-in:nth-child(5) { animation-delay: 0.4s; }
.animate-in:nth-child(6) { animation-delay: 0.45s; }

@media (max-width: 768px) {
  body { font-size: 16px; }
  .case-study-grid { grid-template-columns: 1fr; gap: 24px; }
  .site-header .container { flex-direction: column; align-items: flex-start; gap: 12px; }
  .hero { padding: 48px 0 40px; }
  .metrics-row { grid-template-columns: 1fr; gap: 12px; }
  .about-section__content { grid-template-columns: 1fr; gap: 24px; }
  .about-section__photo { max-width: 200px; }
  .case-study-header__meta { flex-direction: column; gap: 16px; }
  .case-study-nav { flex-direction: column; }
  .case-study-nav__link--next { text-align: left; }
}

@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .case-study-card__content { padding: 18px 18px 22px; }
}