/* ============================================================
   PROJECT CASE STUDY — Portfolio of Marvic Dollentas
   Distinct from VIXEL: merged intro banner, editorial C/S layout
   Plus Jakarta Sans · DM Sans · DM Mono
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,700;1,9..40,300&family=DM+Mono:ital,wght@0,300;0,400;0,500;1,300&display=swap');

/* ── TOKENS ─────────────────────────────────────────────────── */
:root {
  --green:      #10E8A0;
  --cyan:       #22D3EE;
  --grad:       linear-gradient(135deg, #4ADE80 0%, #10E8A0 50%, #06B6D4 100%);
  --grad-text:  linear-gradient(120deg, #4ADE80 0%, #10E8A0 55%, #22D3EE 100%);

  --bg:         #060A08;
  --surface:    #0F1612;
  --surface-2:  #161F1A;
  --ink:        #E6EDE9;
  --ink-mid:    #8A9E94;
  --ink-dim:    #2E3D35;
  --border:     rgba(255,255,255,0.05);
  --border-mid: rgba(255,255,255,0.10);
  --nav-glass:  rgba(6,10,8,0.88);

  --display: 'Plus Jakarta Sans', sans-serif;
  --sans:    'DM Sans', sans-serif;
  --mono:    'DM Mono', monospace;
  --ease:    cubic-bezier(0.22, 1, 0.36, 1);
  --ts:      0.28s;
}

[data-theme="light"] {
  --bg:         #F7FAF8;
  --surface:    #ECEEF0;
  --surface-2:  #E2E5E3;
  --ink:        #0A120D;
  --ink-mid:    #445248;
  --ink-dim:    #C8D4CC;
  --border:     rgba(0,0,0,0.06);
  --border-mid: rgba(0,0,0,0.10);
  --nav-glass:  rgba(247,250,248,0.90);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }

/* ── CURSOR ────────────────────────────────────────────────── */
.cursor {
  position: fixed; width: 6px; height: 6px;
  background: var(--green); border-radius: 50%;
  pointer-events: none; z-index: 9999;
  transform: translate(-50%,-50%);
}
.cursor-ring {
  position: fixed; width: 28px; height: 28px;
  border: 1px solid rgba(16,232,160,.35); border-radius: 50%;
  pointer-events: none; z-index: 9998;
  transform: translate(-50%,-50%);
}

/* ── NAV ────────────────────────────────────────────────────── */
.pnav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 0 40px;
  transition: background .3s var(--ease), backdrop-filter .3s, border-color .3s;
  border-bottom: 1px solid transparent;
}
.pnav.scrolled {
  background: var(--nav-glass);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-color: var(--border);
}
.pnav__inner {
  max-width: 1280px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.pnav__back {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--sans); font-size: 13px; color: var(--ink-mid);
  transition: color var(--ts);
}
.pnav__back:hover { color: var(--ink); }
.pnav__back svg { transition: transform var(--ts); }
.pnav__back:hover svg { transform: translateX(-3px); }
.pnav__logo img { height: 28px; width: auto; }
.pnav__cta {
  font-family: var(--display); font-size: 13px; font-weight: 600;
  padding: 9px 22px; border-radius: 100px;
  background: var(--grad); color: #fff;
  transition: opacity var(--ts), transform var(--ts);
}
.pnav__cta:hover { opacity: .88; transform: translateY(-1px); }

/* ── PAGE WRAPPER ───────────────────────────────────────────── */
.cs { padding-top: 68px; }

/* gradient text helper */
.text-grad {
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─────────────────────────────────────────────────────────────
   INTRO BANNER — replaces separate header + hero-img + overview
   Full-width accent-tinted section with title left, overview right
   ───────────────────────────────────────────────────────────── */
.cs-intro {
  position: relative; overflow: hidden;
  border-bottom: 1px solid var(--border);
  padding: 80px 0 72px;
}

/* accent radial glow in top-right corner */
.cs-intro::before {
  content: '';
  position: absolute; top: -120px; right: -120px;
  width: 480px; height: 480px; border-radius: 50%;
  background: radial-gradient(circle,
    color-mix(in srgb, var(--accent-color, var(--green)) 14%, transparent) 0%,
    transparent 70%
  );
  pointer-events: none;
}
/* thin accent line along the bottom */
.cs-intro::after {
  content: '';
  position: absolute; bottom: 0; left: 40px; right: 40px; height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    color-mix(in srgb, var(--accent-color, var(--green)) 40%, transparent) 30%,
    color-mix(in srgb, var(--accent-color, var(--green)) 40%, transparent) 70%,
    transparent
  );
}

.cs-intro__inner {
  position: relative; z-index: 1;
  max-width: 1280px; margin: 0 auto;
  padding: 0 40px;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: start;
}

/* LEFT — breadcrumb + category + title + tags */
.cs-intro__left {}

.cs-breadcrumb {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--sans); font-size: 12px; color: var(--ink-mid);
  margin-bottom: 40px;
}
.cs-breadcrumb a {
  display: inline-flex; align-items: center; gap: 6px;
  transition: color var(--ts);
}
.cs-breadcrumb a:hover { color: var(--ink); }
.cs-breadcrumb__sep { color: var(--border-mid); }
.cs-breadcrumb__current { color: var(--ink-dim); }

.cs-intro__category {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-color, var(--green));
  margin-bottom: 20px;
}
.cs-intro__title {
  font-family: var(--display); font-weight: 800;
  font-size: clamp(2.8rem, 5vw, 5rem);
  line-height: 1.0; letter-spacing: -0.03em;
  color: var(--ink); margin-bottom: 32px;
}
.cs-intro__tags {
  display: flex; flex-wrap: wrap; gap: 8px;
}
.cs-tag {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.04em;
  padding: 5px 14px; border-radius: 100px;
  border: 1px solid var(--tag-border, rgba(16,232,160,0.28));
  color: var(--accent-color, var(--green));
}

/* RIGHT — year badge + description + divider + meta row */
.cs-intro__right {
  padding-top: 96px; /* visual alignment with title block */
}
.cs-intro__year {
  display: inline-block;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--ink-mid);
  border: 1px solid var(--border-mid); border-radius: 4px;
  padding: 3px 10px; margin-bottom: 24px;
}
.cs-intro__desc {
  font-family: var(--sans); font-size: 1rem; line-height: 1.85;
  color: var(--ink-mid); margin-bottom: 32px;
}
.cs-intro__divider {
  width: 100%; height: 1px;
  background: var(--border); margin-bottom: 28px;
}
.cs-intro__meta {
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px 16px;
}
.cs-meta-label {
  font-family: var(--mono); font-size: 9px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--ink-dim); margin-bottom: 5px;
}
.cs-meta-val {
  font-family: var(--display); font-weight: 600;
  font-size: 13px; color: var(--ink);
}

/* ─────────────────────────────────────────────────────────────
   CHALLENGE & SOLUTION — editorial numbered style (not icon cards)
   ───────────────────────────────────────────────────────────── */
.cs-cs {
  max-width: 1280px; margin: 0 auto 80px;
  padding: 0 40px;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 0 1px; /* hairline divider between columns */
  background: var(--border); /* shows through the gap as divider */
  border: 1px solid var(--border); border-radius: 20px; overflow: hidden;
}
.cs-cs__block {
  padding: 48px 40px;
  background: var(--surface);
  position: relative;
}
/* large faded number watermark */
.cs-cs__block::before {
  content: attr(data-n);
  position: absolute; top: 24px; right: 28px;
  font-family: var(--display); font-weight: 800;
  font-size: 5rem; line-height: 1;
  color: var(--ink-dim);
  letter-spacing: -0.04em;
  pointer-events: none; user-select: none;
}
/* left accent bar */
.cs-cs__block:first-child {
  border-left: 3px solid rgba(255,255,255,0.08);
}
.cs-cs__block:last-child {
  border-left: 3px solid var(--accent-color, var(--green));
}

.cs-cs__label {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--ink-mid);
  margin-bottom: 16px; display: block;
}
.cs-cs__block:last-child .cs-cs__label {
  color: var(--accent-color, var(--green));
}
.cs-cs__heading {
  font-family: var(--display); font-weight: 700;
  font-size: 1.25rem; color: var(--ink); margin-bottom: 16px;
}
.cs-cs__text {
  font-family: var(--sans); font-size: 14.5px;
  line-height: 1.85; color: var(--ink-mid);
}

/* ─────────────────────────────────────────────────────────────
   RESULTS
   ───────────────────────────────────────────────────────────── */
.cs-results {
  max-width: 1280px; margin: 0 auto 80px;
  padding: 0 40px;
}
.cs-results__card {
  position: relative; overflow: hidden;
  padding: 48px 48px 44px;
  border-radius: 20px; border: 1px solid;
  border-color: color-mix(in srgb, var(--accent-color, var(--green)) 22%, transparent);
  background: color-mix(in srgb, var(--accent-color, var(--green)) 4%, var(--surface));
}
.cs-results__glow {
  position: absolute; top: -80px; right: -80px;
  width: 280px; height: 280px; border-radius: 50%;
  background: var(--accent-color, var(--green));
  opacity: 0.12; filter: blur(80px); pointer-events: none;
}
.cs-results__label {
  position: relative;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-color, var(--green));
  margin-bottom: 36px;
}
.cs-results__grid {
  position: relative;
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 2px; background: var(--border); border-radius: 12px; overflow: hidden;
}
.cs-result {
  padding: 24px 20px;
  background: color-mix(in srgb, var(--accent-color, var(--green)) 5%, var(--bg));
}
.cs-result__num {
  font-family: var(--display); font-weight: 800;
  font-size: 1.7rem; line-height: 1;
  color: var(--accent-color, var(--green));
  margin-bottom: 8px;
}
.cs-result__label {
  font-family: var(--sans); font-size: 12px;
  line-height: 1.6; color: var(--ink-mid);
}

/* ─────────────────────────────────────────────────────────────
   PROJECT IMAGES
   ───────────────────────────────────────────────────────────── */
.cs-images {
  max-width: 1280px; margin: 0 auto 80px;
  padding: 0 40px;
  display: flex; flex-direction: column; gap: 12px;
}
.cs-image {
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--surface);
}
.cs-image img {
  width: 100%; height: auto;
  object-fit: cover; object-position: top; display: block;
  transition: transform 0.8s var(--ease);
}
.cs-image:hover img { transform: scale(1.015); }

/* ─────────────────────────────────────────────────────────────
   NEXT PROJECT
   ───────────────────────────────────────────────────────────── */
.cs-next {
  max-width: 1280px; margin: 0 auto;
  padding: 64px 40px 80px;
  border-top: 1px solid var(--border);
}
.cs-next__eyebrow {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--ink-mid);
  margin-bottom: 24px;
}
.cs-next__link {
  display: flex; align-items: flex-end;
  justify-content: space-between; gap: 32px;
  cursor: pointer;
}
.cs-next__cat {
  font-family: var(--sans); font-size: 12px;
  color: var(--ink-mid); margin-bottom: 8px;
}
.cs-next__title {
  font-family: var(--display); font-weight: 800;
  font-size: clamp(2.2rem, 5vw, 4.5rem);
  line-height: 1; letter-spacing: -0.03em; color: var(--ink);
  transition: color var(--ts);
}
.cs-next__link:hover .cs-next__title {
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.cs-next__arrow {
  flex-shrink: 0;
  width: 56px; height: 56px; border-radius: 50%;
  border: 1px solid var(--border-mid);
  display: flex; align-items: center; justify-content: center;
  color: var(--ink); font-size: 20px;
  transition: border-color var(--ts), color var(--ts), transform var(--ts);
}
.cs-next__link:hover .cs-next__arrow {
  border-color: var(--cyan); color: var(--cyan);
  transform: translateX(6px);
}

/* ── SCROLL REVEAL ──────────────────────────────────────────── */
.reveal {
  opacity: 0; transform: translateY(28px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
}
.reveal.in { opacity: 1; transform: none; }

/* ── RESPONSIVE ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .cs-intro__inner { grid-template-columns: 1fr; gap: 40px; }
  .cs-intro__right { padding-top: 0; }
  .cs-results__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .pnav { padding: 0 20px; }
  .cs-intro { padding: 60px 0 56px; }
  .cs-intro__inner { padding: 0 20px; gap: 32px; }
  .cs-cs { grid-template-columns: 1fr; background: none; border: none; border-radius: 0; gap: 12px; padding: 0 20px; }
  .cs-cs__block { border-radius: 16px; border: 1px solid var(--border); }
  .cs-cs__block:first-child { border-left: 1px solid var(--border); }
  .cs-cs__block:last-child  { border-left: 3px solid var(--accent-color, var(--green)); }
  .cs-results { padding: 0 20px; }
  .cs-results__card { padding: 32px 24px; }
  .cs-images { padding: 0 20px; gap: 10px; }
  .cs-next { padding: 48px 20px 56px; }
  .cs-next__title { font-size: 2rem; }
  .cs-next__arrow { width: 44px; height: 44px; font-size: 16px; }
  .cs-intro__meta { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 540px) {
  .cs-results__grid { grid-template-columns: 1fr 1fr; }
  .cs-intro__title { font-size: 2.4rem; }
  .cs-cs__block::before { font-size: 3.5rem; }
}

/* ─────────────────────────────────────────────────────────────
   EXTENDED CASE STUDY SECTIONS — for process heavy write ups
   (multi stage research, solution grids, testing panels, etc.)
   Shared across any works/*.html that needs more than the
   standard intro / challenge-solution / results / images shape.
   ───────────────────────────────────────────────────────────── */

/* bullet list used inside cs-cs__text and standalone */
.cs-cs__text ul, .cs-list {
  margin-top: 14px; padding-left: 0; list-style: none;
  display: grid; gap: 11px;
}
.cs-cs__text li, .cs-list li {
  padding-left: 20px; position: relative;
  font-family: var(--sans); font-size: 14.5px; line-height: 1.7; color: var(--ink-mid);
}
.cs-cs__text li::before, .cs-list li::before {
  content: ''; position: absolute; left: 0; top: 9px;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-color, var(--green));
}

/* generic section wrapper: eyebrow + heading + intro paragraph */
.cs-sec { max-width: 1280px; margin: 0 auto 80px; padding: 0 40px; }
.cs-sec__label {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent-color, var(--green)); margin-bottom: 16px; display: block;
}
.cs-sec__heading {
  font-family: var(--display); font-weight: 800;
  font-size: clamp(1.6rem, 3vw, 2.4rem); letter-spacing: -0.02em;
  color: var(--ink); margin-bottom: 16px; max-width: 22ch;
}
.cs-sec__intro {
  font-family: var(--sans); font-size: 15px; line-height: 1.8;
  color: var(--ink-mid); max-width: 62ch; margin-bottom: 40px;
}

/* card grid — target users, key issues, or any repeating short-form list */
.cs-people { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; background: var(--border); border: 1px solid var(--border); border-radius: 16px; overflow: hidden; }
.cs-person { padding: 28px 26px; background: var(--surface); }
.cs-person__n { font-family: var(--mono); font-size: 11px; color: var(--accent-color, var(--green)); margin-bottom: 14px; }
.cs-person__t { font-family: var(--display); font-weight: 700; font-size: 15px; color: var(--ink); margin-bottom: 8px; }
.cs-person__d { font-family: var(--sans); font-size: 13px; line-height: 1.65; color: var(--ink-mid); }

/* stat strip — reuses cs-results visuals with a 3 column variant */
.cs-stats3 .cs-results__grid { grid-template-columns: repeat(3, 1fr); }

/* 2x2 solution / pillar grid */
.cs-solutions { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; background: var(--border); border: 1px solid var(--border); border-radius: 20px; overflow: hidden; }
.cs-solution { padding: 40px 36px; background: var(--surface); position: relative; }
.cs-solution::before {
  content: attr(data-n); position: absolute; top: 22px; right: 26px;
  font-family: var(--display); font-weight: 800; font-size: 3.2rem; line-height: 1;
  color: var(--ink-dim); letter-spacing: -0.03em; pointer-events: none; user-select: none;
}
.cs-solution__label { font-family: var(--mono); font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-mid); margin-bottom: 14px; display: block; }
.cs-solution__heading { font-family: var(--display); font-weight: 700; font-size: 1.05rem; color: var(--ink); margin-bottom: 4px; max-width: 18ch; }

/* horizontal process / wireframe flow */
.cs-flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.cs-flow__step { position: relative; padding: 0 18px; }
.cs-flow__node {
  display: flex; flex-direction: column; align-items: flex-start; gap: 14px;
  padding: 26px 20px; border: 1px solid var(--border); border-radius: 14px; background: var(--surface);
  height: 100%;
}
.cs-flow__badge {
  width: 30px; height: 30px; border-radius: 8px; display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: 12px; color: var(--bg);
  background: var(--accent-color, var(--green));
}
.cs-flow__title { font-family: var(--display); font-weight: 700; font-size: 14px; color: var(--ink); }
.cs-flow__desc { font-family: var(--sans); font-size: 12.5px; line-height: 1.6; color: var(--ink-mid); }
.cs-flow__arrow {
  display: none; position: absolute; top: 35px; right: -3px; z-index: 1;
  width: 24px; height: 24px; align-items: center; justify-content: center;
  color: var(--ink-dim);
}
.cs-flow__step:not(:last-child) .cs-flow__arrow { display: flex; }

/* two column comparison panel — feedback vs changes, before vs after */
.cs-testing {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0 1px; background: var(--border);
  border: 1px solid var(--border); border-radius: 20px; overflow: hidden;
}
.cs-testing__col { padding: 40px 36px; background: var(--surface); }
.cs-testing__label { font-family: var(--mono); font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 18px; display: block; color: var(--ink-mid); }
.cs-testing__col--after .cs-testing__label { color: var(--accent-color, var(--green)); }

/* closing text + highlighted takeaway / insight callout */
.cs-conclusion__text {
  font-family: var(--sans); font-size: 15.5px; line-height: 1.9; color: var(--ink-mid);
  max-width: 68ch; margin-bottom: 28px;
}
.cs-takeaway {
  position: relative; overflow: hidden;
  padding: 32px 36px; border-radius: 16px;
  border: 1px solid color-mix(in srgb, var(--accent-color, var(--green)) 22%, transparent);
  background: color-mix(in srgb, var(--accent-color, var(--green)) 5%, var(--surface));
  margin-bottom: 40px;
}
.cs-takeaway:last-child { margin-bottom: 0; }
.cs-takeaway__label { font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent-color, var(--green)); margin-bottom: 12px; display: block; }
.cs-takeaway__text { font-family: var(--display); font-weight: 600; font-size: 1.15rem; line-height: 1.5; color: var(--ink); max-width: 52ch; }

/* small external link, used near intro or section copy */
.cs-extlink {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--sans); font-size: 13px; font-weight: 500;
  color: var(--accent-color, var(--green));
  transition: opacity var(--ts);
}
.cs-extlink:hover { opacity: 0.78; }

@media (max-width: 1024px) {
  .cs-people { grid-template-columns: 1fr; }
  .cs-solutions { grid-template-columns: 1fr; }
  .cs-flow { grid-template-columns: 1fr; gap: 14px; }
  .cs-flow__arrow { display: none !important; }
  .cs-testing { grid-template-columns: 1fr; }
  .cs-stats3 .cs-results__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .cs-sec { padding: 0 20px; margin-bottom: 56px; }
  .cs-solution { padding: 30px 24px; }
  .cs-testing__col { padding: 30px 24px; }
  .cs-takeaway { padding: 26px 24px; }
}
@media (max-width: 540px) {
  .cs-stats3 .cs-results__grid { grid-template-columns: 1fr; }
}