/* ============================================================
   CSS Custom Properties — edit here to restyle everything
   ============================================================ */
:root {
  /* Colors */
  --color-bg:         #ffffff;
  --color-text:       #0d0d0d;
  --color-muted:      #888888;
  --color-border:     #e6e6e6;
  --color-card-bg:    #ebebeb;
  --color-overlay:    rgba(0, 0, 0, 0.10);

  /* Typography */
  --font-serif:       'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-sans:        'Inter', 'Helvetica Neue', Arial, sans-serif;

  /* Layout */
  --header-height:    60px;
  --max-width:        1280px;
  --gutter:           clamp(1.5rem, 5vw, 4rem);
  --section-gap:      clamp(4rem, 10vw, 8rem);
}

/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* ============================================================
   Layout Helpers
   ============================================================ */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ============================================================
   Header
   ============================================================ */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  display: flex;
  align-items: center;
}

.header-inner {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-name {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.025em;
}

.header-name a {
  transition: opacity 0.2s ease;
}

.header-name a:hover {
  opacity: 0.5;
}

nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

nav a {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  text-transform: lowercase;
  position: relative;
  padding-bottom: 2px;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-text);
  transition: width 0.28s ease;
}

nav a:hover::after {
  width: 100%;
}

/* ============================================================
   Hero Section
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding-top: var(--header-height);
  padding-left: var(--gutter);
  padding-right: var(--gutter);
  padding-bottom: clamp(3rem, 8vw, 6rem);
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero-name {
  font-family: var(--font-serif);
  font-size: clamp(3.5rem, 9vw, 8rem);
  font-weight: 400;
  line-height: 1.0;
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
}

/* Wrapper clips the slide-in/out animation */
.hero-rotating-wrapper {
  overflow: hidden;
  height: clamp(2.2rem, 5.5vw, 4.5rem);
  display: flex;
  align-items: flex-end;
}

.hero-rotating-text {
  font-family: var(--font-sans);
  font-size: clamp(1.4rem, 4vw, 3.2rem);
  font-weight: 300;
  color: var(--color-muted);
  letter-spacing: -0.01em;
  line-height: 1.1;
  display: block;
  will-change: transform, opacity;
  transition: opacity 0.38s ease, transform 0.38s ease;
}

/* ============================================================
   Work / Case Study Grid Section
   ============================================================ */
.work-section {
  padding-top: var(--section-gap);
  padding-bottom: var(--section-gap);
  border-top: 1px solid var(--color-border);
}

.section-label {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 3rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 380px), 1fr));
  gap: 3rem 2.5rem;
}

/* ============================================================
   Card
   ============================================================ */
.card {
  display: block;
  cursor: pointer;
}

.card-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  background-color: var(--color-card-bg);
  position: relative;
  overflow: hidden;
  margin-bottom: 1.25rem;
  transition: outline-color 0.3s ease;
  outline: 1px solid transparent;
}

/* Darkening overlay on hover */
.card-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background-color: transparent;
  transition: background-color 0.35s ease;
}

.card:hover .card-image::after {
  background-color: var(--color-overlay);
}

.card:hover .card-image {
  outline-color: rgba(0, 0, 0, 0.18);
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.45rem;
}

.card-subtitle {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.card-year {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  color: var(--color-muted);
  font-variant-numeric: tabular-nums;
}

.card-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 400;
  line-height: 1.3;
  transition: opacity 0.2s ease;
}

.card:hover .card-title {
  opacity: 0.6;
}

/* ============================================================
   Footer
   ============================================================ */
footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-social {
  display: flex;
  gap: 1.75rem;
  flex-wrap: wrap;
}

.footer-social a {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  transition: color 0.2s ease;
}

.footer-social a:hover {
  color: var(--color-text);
}

.footer-clock {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--color-muted);
  font-variant-numeric: tabular-nums;
}

/* ============================================================
   Case Study Page — specific styles
   ============================================================ */
.cs-back-wrapper {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: calc(var(--header-height) + 2.5rem) var(--gutter) 0;
}

.cs-back {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  transition: color 0.2s ease;
}

.cs-back:hover {
  color: var(--color-text);
}

.cs-hero-image {
  width: 100%;
  height: 60vh;
  background-color: var(--color-card-bg);
  margin-top: 2.5rem;
}

.cs-content {
  max-width: 720px;
  margin: 0 auto;
  padding: clamp(3rem, 6vw, 5rem) var(--gutter) clamp(5rem, 12vw, 10rem);
}

.cs-subtitle {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 1rem;
}

.cs-title {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 6vw, 4.5rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.cs-content h2 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 400;
  line-height: 1.3;
  margin-top: 3rem;
  margin-bottom: 1rem;
}

.cs-content p {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.85;
  color: #3a3a3a;
  margin-bottom: 1.5rem;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 640px) {
  nav {
    gap: 1.25rem;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-clock {
    order: -1;
  }
}