/* ============================================================
   Houssam Moallem, Product Portfolio
   Palette: ink navy / cool paper / petrol green / amber
   Type: Sora (display) + IBM Plex Sans (body) + IBM Plex Mono (labels)
   ============================================================ */

:root {
  --ink: #0f1d2e;
  --ink-soft: #22344a;
  --paper: #f6f8fa;
  --card: #ffffff;
  --line: #dde4ea;
  --slate: #5b6b7c;
  --green: #0e7c66;
  --green-soft: #e2f1ed;
  --amber: #e8a33d;
  --amber-soft: #fbf1de;
  --radius: 14px;
  --maxw: 1080px;
  --font-display: "Sora", system-ui, sans-serif;
  --font-body: "IBM Plex Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.65;
  font-size: 16.5px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 2px;
  border-radius: 4px;
}

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

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

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(246, 248, 250, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand {
  font-family: var(--font-display);
  font-weight: 700; font-size: 17px; color: var(--ink);
  letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; }
.brand .pmp {
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  color: var(--green); background: var(--green-soft);
  padding: 2px 7px; border-radius: 999px; margin-left: 8px;
  vertical-align: middle;
}
.nav-links { display: flex; gap: 22px; align-items: center; }
.nav-links a { color: var(--ink-soft); font-size: 15px; font-weight: 500; }
.nav-links a:hover { color: var(--green); text-decoration: none; }
.nav-links a.cta {
  background: var(--ink); color: #fff; padding: 8px 16px; border-radius: 999px;
  font-size: 14px;
}
.nav-links a.cta:hover { background: var(--green); }

/* ---------- Hero ---------- */
.hero { padding: 88px 0 64px; }
.status-chip {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 12.5px; font-weight: 500;
  color: var(--green); background: var(--green-soft);
  border: 1px solid rgba(14, 124, 102, 0.25);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 26px;
}
.status-chip::before {
  content: ""; width: 8px; height: 8px; border-radius: 50%;
  background: var(--green);
  animation: pulse 2.2s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }
@media (prefers-reduced-motion: reduce) {
  .status-chip::before { animation: none; }
  html { scroll-behavior: auto; }
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(34px, 5.2vw, 56px);
  font-weight: 700; line-height: 1.12; letter-spacing: -0.025em;
  max-width: 18ch;
}
.hero h1 .hl { color: var(--green); }
.hero .lede {
  margin-top: 24px; max-width: 62ch; font-size: 18.5px; color: var(--ink-soft);
}
.hero-actions { margin-top: 34px; display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-block; font-family: var(--font-display); font-weight: 600;
  font-size: 15px; padding: 13px 26px; border-radius: 999px;
  transition: transform 0.15s ease, background 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--ink); color: #fff; }
.btn-primary:hover { background: var(--green); }
.btn-ghost { border: 1.5px solid var(--line); color: var(--ink); background: var(--card); }
.btn-ghost:hover { border-color: var(--green); color: var(--green); }

/* ---------- Section scaffolding ---------- */
section { padding: 64px 0; }
.eyebrow {
  font-family: var(--font-mono); font-size: 12.5px; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--green);
  margin-bottom: 14px;
}
.section-title {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(26px, 3.4vw, 36px); letter-spacing: -0.02em;
  margin-bottom: 14px;
}
.section-sub { color: var(--slate); max-width: 60ch; margin-bottom: 40px; }

/* ---------- Clients ---------- */
.clients { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--card); }
.client-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 14px;
}
.client-card {
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  gap: 10px; padding: 26px 20px; border: 1px solid var(--line); border-radius: var(--radius);
  background: #fff; text-align: center; min-height: 132px;
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}
.client-card:hover {
  text-decoration: none; border-color: var(--green); transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(15, 29, 46, 0.07);
}
.client-logo {
  height: 40px; width: auto; max-width: 100%;
  object-fit: contain;
  opacity: 0.9;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.client-card:hover .client-logo { opacity: 1; transform: scale(1.03); }
.client-mark {
  font-family: var(--font-display); font-weight: 700; font-size: 19px;
  color: var(--ink); letter-spacing: -0.01em;
}
.client-domain { font-family: var(--font-mono); font-size: 11.5px; color: var(--slate); }

/* ---------- Case study cards ---------- */
.case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
@media (max-width: 780px) { .case-grid { grid-template-columns: 1fr; } }

.case-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; display: flex; flex-direction: column; gap: 14px;
  color: var(--ink); position: relative;
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}
.case-card:hover {
  text-decoration: none; border-color: var(--green);
  transform: translateY(-3px); box-shadow: 0 12px 28px rgba(15, 29, 46, 0.08);
}
.case-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.case-id { font-family: var(--font-mono); font-size: 12px; color: var(--slate); letter-spacing: 0.08em; }
.chip {
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  padding: 3px 10px; border-radius: 999px;
}
.chip-live { color: var(--green); background: var(--green-soft); }
.chip-delivered { color: #8a6116; background: var(--amber-soft); }
.case-card h3 {
  font-family: var(--font-display); font-size: 20px; font-weight: 600;
  letter-spacing: -0.015em; line-height: 1.3;
}
.case-card p { color: var(--slate); font-size: 15.5px; flex-grow: 1; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-family: var(--font-mono); font-size: 11.5px; color: var(--ink-soft);
  background: var(--paper); border: 1px solid var(--line);
  padding: 3px 10px; border-radius: 999px;
}
.case-link { font-family: var(--font-display); font-weight: 600; font-size: 14.5px; color: var(--green); }
.case-card:hover .case-link { text-decoration: underline; }

/* ---------- Credentials ---------- */
.cred-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; }
.cred {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 24px;
}
.cred b { font-family: var(--font-display); font-size: 16px; display: block; margin-bottom: 4px; }
.cred span { color: var(--slate); font-size: 14.5px; }

/* ---------- Case study detail pages ---------- */
.cs-hero { padding: 72px 0 40px; border-bottom: 1px solid var(--line); }
.cs-hero h1 {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(28px, 4.2vw, 44px); letter-spacing: -0.02em; line-height: 1.15;
  max-width: 24ch; margin-top: 8px;
}
.cs-hero .tagline { margin-top: 18px; font-size: 18px; color: var(--ink-soft); max-width: 58ch; }

.meta-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1px; background: var(--line); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden; margin-top: 36px;
}
.meta-cell { background: var(--card); padding: 18px 20px; }
.meta-cell .k {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--slate); margin-bottom: 5px;
}
.meta-cell .v { font-weight: 500; font-size: 15px; }

.cs-cover {
  max-width: 760px; margin: 40px auto 0; padding: 0 24px;
}
.cs-cover img {
  width: 100%; border-radius: var(--radius); border: 1px solid var(--line);
}
.cs-cover figcaption {
  font-family: var(--font-mono); font-size: 12px; color: var(--slate);
  margin-top: 10px; text-align: center;
}

.cs-body { max-width: 760px; margin: 0 auto; padding: 56px 24px 72px; }
.cs-body h2 {
  font-family: var(--font-display); font-size: 24px; font-weight: 700;
  letter-spacing: -0.015em; margin: 44px 0 14px;
}
.cs-body h2:first-child { margin-top: 0; }
.cs-body p { margin-bottom: 16px; color: var(--ink-soft); }
.cs-body ul { margin: 0 0 16px 20px; color: var(--ink-soft); }
.cs-body li { margin-bottom: 9px; }
.cs-body li::marker { color: var(--green); }

.outcome-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px; margin: 24px 0;
}
.outcome {
  background: var(--card); border: 1px solid var(--line);
  border-left: 4px solid var(--green); border-radius: 10px; padding: 18px 20px;
}
.outcome b { font-family: var(--font-display); font-size: 17px; display: block; margin-bottom: 4px; }
.outcome span { color: var(--slate); font-size: 14px; }

.callout {
  background: var(--green-soft); border: 1px solid rgba(14, 124, 102, 0.25);
  border-radius: var(--radius); padding: 22px 24px; margin: 26px 0;
}
.callout .k {
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--green); margin-bottom: 8px;
}
.callout p { margin: 0; color: var(--ink); }

.cs-nav {
  display: flex; justify-content: space-between; gap: 16px;
  border-top: 1px solid var(--line); padding-top: 28px; margin-top: 56px;
  flex-wrap: wrap;
}

/* ---------- About page ---------- */
.about-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: start; }
@media (max-width: 820px) { .about-grid { grid-template-columns: 1fr; } }
.facts {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px;
}
.facts h3 { font-family: var(--font-display); font-size: 17px; margin-bottom: 16px; }
.facts dl { display: grid; gap: 14px; }
.facts dt {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--slate);
}
.facts dd { font-weight: 500; font-size: 15px; }

/* ---------- Contact / footer ---------- */
.contact-band { background: var(--ink); color: #fff; border-radius: 0; }
.contact-band .section-title { color: #fff; }
.contact-band p { color: #b9c5d1; max-width: 56ch; }
.contact-band .eyebrow { color: var(--amber); }
.contact-links { margin-top: 30px; display: flex; gap: 14px; flex-wrap: wrap; }
.contact-links .btn-primary { background: var(--green); }
.contact-links .btn-primary:hover { background: #0a6353; }
.contact-links .btn-ghost { background: transparent; color: #fff; border-color: #3b4d61; }
.contact-links .btn-ghost:hover { border-color: var(--amber); color: var(--amber); }

footer { padding: 30px 0 44px; }
.footer-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 14px; color: var(--slate);
}
.footer-inner a { color: var(--slate); }
.footer-inner a:hover { color: var(--green); }

/* ---------- Burger menu ---------- */
.nav-burger {
  display: none;
  width: 44px; height: 44px;
  flex-direction: column; justify-content: center; align-items: center; gap: 5px;
  background: none; border: 1.5px solid var(--line); border-radius: 10px;
  cursor: pointer; padding: 0;
}
.nav-burger span {
  display: block; width: 20px; height: 2px; background: var(--ink);
  border-radius: 2px; transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav.open .nav-burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav.open .nav-burger span:nth-child(2) { opacity: 0; }
.nav.open .nav-burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   Responsive: tablet (<= 1024px)
   ============================================================ */
@media (max-width: 1024px) {
  .hero { padding: 68px 0 52px; }
  section { padding: 52px 0; }
  .cs-hero { padding: 56px 0 36px; }
  .about-grid { gap: 32px; }
  .client-grid { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
}

/* ============================================================
   Responsive: mobile nav (<= 760px)
   ============================================================ */
@media (max-width: 760px) {
  .nav-burger { display: flex; }
  .nav-inner { padding: 12px 20px; }
  .nav-links {
    display: none;
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--card); border-bottom: 1px solid var(--line);
    box-shadow: 0 16px 32px rgba(15, 29, 46, 0.10);
    padding: 8px 0 14px;
  }
  .nav.open .nav-links { display: flex; }
  .nav-links a {
    padding: 14px 24px; font-size: 16px;
  }
  .nav-links a.cta {
    margin: 10px 20px 0; text-align: center; border-radius: 12px; padding: 13px 16px;
  }
}

/* ============================================================
   Responsive: mobile (<= 620px)
   ============================================================ */
@media (max-width: 620px) {
  body { font-size: 16px; }
  .wrap { padding: 0 20px; }
  .hero { padding: 48px 0 40px; }
  section { padding: 44px 0; }
  .hero .lede { font-size: 17px; }
  .status-chip { font-size: 11.5px; padding: 6px 12px; }

  .hero-actions .btn, .contact-links .btn {
    flex: 1 1 100%; text-align: center;
  }

  .client-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .client-card { padding: 20px 10px; }
  .client-mark { font-size: 16px; }
  .client-domain { font-size: 10.5px; }

  .case-card { padding: 22px; }

  .cs-hero { padding: 44px 0 30px; }
  .meta-grid { grid-template-columns: 1fr 1fr; margin-top: 28px; }
  .meta-cell { padding: 14px 16px; }
  .cs-body { padding: 40px 20px 56px; }
  .cs-body h2 { font-size: 21px; margin-top: 36px; }
  .outcome-grid { grid-template-columns: 1fr; }
  .callout { padding: 18px 20px; }
  .cs-nav { flex-direction: column; gap: 12px; }

  .facts { padding: 22px 20px; }
  .footer-inner { flex-direction: column; gap: 8px; }
}

/* ============================================================
   Responsive: small phones (<= 400px)
   ============================================================ */
@media (max-width: 400px) {
  .brand .pmp { display: none; }
  .client-grid { grid-template-columns: 1fr; }
  .meta-grid { grid-template-columns: 1fr; }
}

.nav-links .active { color: var(--green) !important; font-weight: 800; font-size: 15px; cursor: default; text-decoration: none; }