/* ==========================================================================
   Shared styling for case-study pages (work/)
   Same tokens + Host Grotesk as the main site. Self-contained.
   ========================================================================== */
:root {
  --bg:        #fafaf9;
  --surface:   #ffffff;
  --surface-2: #f3f3f1;
  --ink:       #16150f;
  --ink-soft:  #57544c;
  --line:      #e6e4df;
  --accent:    #0f7a5a;
  --accent-2:  #0c6249;
  --accent-tint:#e7f3ee;
  --on-accent: #ffffff;
  --prose:     #2c2a22;
  --font-sans: "Host Grotesk", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --radius: 16px;
  --radius-sm: 10px;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --dur: .35s;
}
:root[data-theme="dark"] {
  --bg:         #121210;
  --surface:    #1b1a17;
  --surface-2:  #232019;
  --ink:        #f5f3ee;
  --ink-soft:   #b7b2a5;
  --line:       #34312a;
  --accent:     #3ddc97;
  --accent-2:   #29c081;
  --accent-tint:#17332a;
  --on-accent:  #06231a;
  --prose:      #dcd8cc;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:         #121210;
    --surface:    #1b1a17;
    --surface-2:  #232019;
    --ink:        #f5f3ee;
    --ink-soft:   #b7b2a5;
    --line:       #34312a;
    --accent:     #3ddc97;
    --accent-2:   #29c081;
    --accent-tint:#17332a;
    --on-accent:  #06231a;
    --prose:      #dcd8cc;
  }
}
:root { color-scheme: light dark; }
:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"]  { color-scheme: dark; }

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  font-size: clamp(1.02rem, 1rem + .25vw, 1.15rem);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--accent-2); text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

/* Reading column + a wider column for cover / prototype */
.wrap {
  width: 100%;
  max-width: 46rem;
  margin-inline: auto;
  padding-inline: clamp(1.1rem, 5vw, 2rem);
}
.wrap-wide { max-width: 64rem; }

/* ---------- Top bar ---------- */
.cs-nav {
  position: sticky; top: 0; z-index: 50;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
}
.cs-nav .wrap {
  max-width: 64rem;
  display: flex; align-items: center; justify-content: space-between;
  min-height: 4rem;
}
.back-link { display: inline-flex; align-items: center; gap: .5rem; font-weight: 600; font-size: .95rem; color: var(--ink); text-decoration: none; transition: gap var(--dur) var(--ease); }
.back-link:hover { gap: .8rem; }
.brand-mini { font-weight: 700; font-size: .95rem; color: var(--ink-soft); text-decoration: none; }
.brand-mini:hover { color: var(--ink); }

.nav-end { display: flex; align-items: center; gap: 1rem; }

/* Theme toggle */
.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0;
  width: 2.2rem; height: 2.2rem;
  border: 0; border-radius: 999px;
  background: transparent; color: var(--ink-soft);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.theme-toggle:hover { background: var(--accent-tint); color: var(--accent-2); }
.theme-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
@media (max-width: 760px) {
  .theme-toggle { width: 2.75rem; height: 2.75rem; }
}
.theme-icon { display: block; }
.theme-icon-moon { display: none; }
:root[data-theme="dark"] .theme-icon-sun { display: none; }
:root[data-theme="dark"] .theme-icon-moon { display: block; }

/* ---------- Hero ---------- */
.cs-header { padding-block: clamp(2.5rem, 7vw, 4.5rem) clamp(1.5rem, 4vw, 2.5rem); }
.cs-eyebrow { font-size: .8rem; letter-spacing: .14em; text-transform: uppercase; font-weight: 600; color: var(--accent); margin-bottom: 1rem; }
.cs-h1 { font-weight: 700; font-size: clamp(2rem, 1.3rem + 3.4vw, 3.2rem); line-height: 1.08; letter-spacing: -.02em; }
.cs-lede { margin-top: 1.1rem; color: var(--ink-soft); font-size: clamp(1.1rem, 1rem + .5vw, 1.3rem); max-width: 48ch; }

.cs-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.5rem;
  margin-top: 1.8rem;
  padding-block: 1.2rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.cs-meta div { display: flex; flex-direction: column; gap: .2rem; }
.cs-meta .k { font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-soft); font-weight: 600; }
.cs-meta .v { font-size: .98rem; font-weight: 500; }

/* ---------- Cover ---------- */
.cs-cover {
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: radial-gradient(120% 120% at 20% 10%, var(--accent-tint), transparent 60%), linear-gradient(160deg, var(--surface-2), var(--surface));
  display: grid; place-items: center;
  color: var(--ink-soft); font-size: .85rem; letter-spacing: .04em;
  margin-block: clamp(2rem, 5vw, 3rem);
  overflow: hidden;
}
.cs-cover img { width: 100%; height: 100%; object-fit: cover; }

/* ---------- Body prose ---------- */
.cs-body { padding-bottom: clamp(2.5rem, 6vw, 4rem); }
.cs-body > * + * { margin-top: 1.3rem; }
.cs-sec { font-size: .8rem; text-transform: uppercase; letter-spacing: .1em; color: var(--accent); font-weight: 600; margin-top: 2.6rem; }
.cs-body h2 { font-weight: 600; font-size: clamp(1.4rem, 1.1rem + 1.2vw, 1.9rem); line-height: 1.2; letter-spacing: -.01em; margin-top: .4rem; }
.cs-body p { color: var(--prose); }
.cs-body ul, .cs-body ol { padding-left: 1.3rem; color: var(--prose); }
.cs-body li { margin-top: .5rem; }
.cs-body blockquote { border-left: 3px solid var(--accent); padding: .4rem 0 .4rem 1.3rem; color: var(--ink-soft); font-size: 1.12em; font-style: italic; }
.cs-body hr { border: 0; border-top: 1px solid var(--line); margin-block: 2.5rem; }

/* Image grid for process shots */
.cs-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; margin-top: 1.4rem; }
.cs-shot { aspect-ratio: 4 / 3; border-radius: var(--radius-sm); border: 1px solid var(--line); background: var(--surface-2); display: grid; place-items: center; color: var(--ink-soft); font-size: .82rem; overflow: hidden; }
.cs-shot img { width: 100%; height: 100%; object-fit: cover; }
@media (min-width: 620px) { .cs-grid.two { grid-template-columns: 1fr 1fr; } }

/* Outcome checklist (qualitative outcomes, no hard numbers) */
.cs-checks { list-style: none; padding: 0; margin-top: 1.2rem; display: grid; gap: .7rem; }
.cs-checks li { position: relative; padding-left: 1.8rem; color: var(--prose); }
.cs-checks li::before {
  content: ""; position: absolute; left: 0; top: .35em;
  width: 1.05rem; height: 1.05rem; border-radius: 50%;
  background: var(--accent-tint);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230c6249' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E");
  background-size: .7rem; background-position: center; background-repeat: no-repeat;
}
:root[data-theme="dark"] .cs-checks li::before {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2329c081' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E");
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .cs-checks li::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2329c081' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E");
  }
}

/* Contribution panel: "I led" vs "Team" */
.cs-panel {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: clamp(1.25rem, 4vw, 2rem); margin-top: 1.4rem;
}
.cs-split { display: grid; grid-template-columns: 1fr; gap: 1.5rem 2rem; }
@media (min-width: 620px) { .cs-split { grid-template-columns: 1fr 1fr; } }
.cs-split h3 { font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; color: var(--accent); font-weight: 600; margin-bottom: .8rem; }
.cs-split ul { list-style: none; padding: 0; display: grid; gap: .55rem; }
.cs-split li { position: relative; padding-left: 1.1rem; font-size: .96rem; color: var(--prose); }
.cs-split li::before { content: ""; position: absolute; left: 0; top: .6em; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.cs-split .team li::before { background: var(--ink-soft); }

/* Outcome metrics */
.cs-metrics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .8rem; margin-top: 1.4rem; }
.cs-metric { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 1rem; }
.cs-metric b { display: block; font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem); font-weight: 600; color: var(--accent); }
.cs-metric span { font-size: .82rem; color: var(--ink-soft); }
@media (max-width: 460px) { .cs-metrics { grid-template-columns: 1fr; } }

/* ==========================================================================
   PROTOTYPE EMBED — device-framed, lazy-loaded iframe
   ========================================================================== */
.proto { margin-block: clamp(2rem, 6vw, 3.5rem); }
.proto-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.proto-head .cs-sec { margin-top: 0; }
.proto-frame { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--surface); box-shadow: 0 30px 60px -40px rgba(22,21,15,.35); }
.proto-chrome { display: flex; align-items: center; gap: .55rem; padding: .7rem 1rem; background: var(--surface-2); border-bottom: 1px solid var(--line); }
.proto-dot { width: 11px; height: 11px; border-radius: 50%; background: #cfccc4; flex-shrink: 0; }
.proto-url { flex: 1; text-align: center; font-size: .78rem; color: var(--ink-soft); background: var(--surface); border-radius: 6px; padding: .25rem .75rem; margin-inline: .5rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.proto-fs {
  display: inline-flex; align-items: center; gap: .35rem;
  background: transparent; border: 1px solid var(--line); color: var(--ink);
  font-size: .8rem; font-weight: 600; padding: .35rem .7rem; border-radius: 999px;
  cursor: pointer; transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.proto-fs:hover { border-color: var(--accent); color: var(--accent-2); }

/* The stage holds the iframe at a fixed ratio (browser ~16/10) */
.proto-stage { position: relative; aspect-ratio: 16 / 10; background: var(--surface); }
.proto-stage iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
/* Switch to a phone shape by adding class "mobile" on .proto-stage */
.proto-stage.mobile { aspect-ratio: 9 / 16; max-width: 22rem; margin-inline: auto; }

.proto-cap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-top: .8rem; }
.proto-cap small { color: var(--ink-soft); font-size: .85rem; }
.proto-cap a { font-size: .85rem; font-weight: 600; }

/* ---------- Next / footer ---------- */
.cs-next {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  border-top: 1px solid var(--line); padding-top: 1.6rem; margin-top: 2rem;
}
.cs-next .nl { font-size: .8rem; color: var(--ink-soft); }
.cs-next .nt { font-size: 1.15rem; font-weight: 600; }
.cs-next .nt a { color: var(--ink); text-decoration: none; }
.cs-next .nt a:hover { color: var(--accent-2); }
.pill-cta {
  display: inline-flex; align-items: center; gap: .4rem;
  background: var(--accent); color: var(--on-accent); font-weight: 600; font-size: .92rem;
  padding: .75rem 1.25rem; border-radius: 999px; text-decoration: none;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.pill-cta:hover { background: var(--accent-2); transform: translateY(-2px); }

.cs-foot { border-top: 1px solid var(--line); padding-block: 2rem; margin-top: clamp(2.5rem, 6vw, 4rem); }
.cs-foot .wrap { max-width: 64rem; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; align-items: center; }
.cs-foot small { color: var(--ink-soft); }
.cs-foot small a.foot-email {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.cs-foot small a.foot-email:hover { color: var(--accent-2); border-bottom-color: var(--accent); }

/* ==========================================================================
   INDEX PAGE — /work/  (listing all case studies as cards)
   ========================================================================== */
.index-header { padding-block: clamp(2.5rem, 7vw, 4.5rem) clamp(1.5rem, 4vw, 2.5rem); }
.index-h1 { font-weight: 700; font-size: clamp(2rem, 1.3rem + 3.4vw, 3.2rem); line-height: 1.08; letter-spacing: -.02em; }
.index-sub { margin-top: 1.1rem; color: var(--ink-soft); font-size: clamp(1.05rem, 1rem + .4vw, 1.2rem); max-width: 48ch; }

.cards { display: grid; grid-template-columns: 1fr; gap: clamp(1.25rem, 3vw, 1.75rem); padding-bottom: clamp(3rem, 8vw, 5rem); }
.card {
  display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; color: inherit; text-decoration: none;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.card:hover {
  transform: translateY(-6px);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
  box-shadow: 0 24px 48px -28px rgba(22,21,15,.4);
}
.card-media {
  aspect-ratio: 16 / 10; display: grid; place-items: center;
  background:
    radial-gradient(120% 120% at 20% 10%, var(--accent-tint), transparent 60%),
    linear-gradient(160deg, var(--surface-2), var(--surface));
  border-bottom: 1px solid var(--line); overflow: hidden;
}
.card-media-icon {
  width: clamp(3.4rem, 2.6rem + 3vw, 4.6rem);
  height: clamp(3.4rem, 2.6rem + 3vw, 4.6rem);
  color: var(--accent-2);
}
.card-body { display: flex; flex-direction: column; gap: .8rem; padding: clamp(1.1rem, 3vw, 1.5rem); flex: 1; }
.card-title { font-weight: 600; font-size: 1.3rem; }
.card-desc { color: var(--ink-soft); font-size: .95rem; }
.tags { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: .45rem; margin-top: auto; }
.tags li {
  font-size: .75rem; font-weight: 600; letter-spacing: .02em;
  color: var(--accent-2); background: var(--accent-tint);
  padding: .3rem .65rem; border-radius: 999px;
}
.card-go { display: inline-flex; align-items: center; gap: .4rem; margin-top: .5rem; font-weight: 600; font-size: .9rem; color: var(--accent-2); }
.card-go span { transition: transform var(--dur) var(--ease); }
.card:hover .card-go span { transform: translateX(4px); }

@media (min-width: 720px) { .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 900px) { .cards { grid-template-columns: repeat(3, minmax(0, 1fr)); } }