/* =========================================================
   Mudit Tripathi — Data Platform Architect Portfolio
   Design system: clean light theme + deep blue accent
   ========================================================= */

:root {
  /* Color palette */
  --color-bg: #ffffff;
  --color-bg-alt: #f6f8fb;
  --color-bg-dark: #0b1f3a;
  --color-bg-dark-alt: #102a4c;
  --color-ink: #0f172a;
  --color-ink-muted: #475569;
  --color-ink-soft: #64748b;
  --color-border: #e2e8f0;
  --color-border-dark: #1e3a5f;
  --color-primary: #1d4ed8;
  --color-primary-dark: #1e3a8a;
  --color-primary-darker: #14285c;
  --color-primary-light: #eef2ff;
  --color-accent: #0891b2;
  --color-success-bg: #ecfdf5;
  --color-success-text: #047857;
  --color-white: #ffffff;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
  --space-10: 8rem;

  /* Layout */
  --container-max: 1180px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; }
button { font-family: inherit; }
h1, h2, h3, h4 { margin: 0; line-height: 1.2; font-weight: 700; letter-spacing: -0.01em; }
p { margin: 0; }
main { display: block; }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary-dark);
  color: #fff;
  padding: var(--space-3) var(--space-5);
  z-index: 1000;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; }

/* ---------- Eyebrow / tags ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  font-weight: 600;
}
.eyebrow::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  display: inline-block;
}

.tag-row { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-ink-muted);
  background: var(--color-bg-alt);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.98rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn-primary {
  background: var(--color-primary-dark);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--color-primary-darker); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-secondary {
  background: transparent;
  color: var(--color-primary-dark);
  border-color: var(--color-border);
}
.btn-secondary:hover { border-color: var(--color-primary-dark); background: var(--color-primary-light); }
.btn-on-dark {
  background: #fff;
  color: var(--color-primary-darker);
}
.btn-on-dark:hover { background: var(--color-primary-light); transform: translateY(-1px); }
.btn-ghost-on-dark {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.35);
}
.btn-ghost-on-dark:hover { border-color: #fff; background: rgba(255,255,255,0.08); }
.btn-block { width: 100%; }
.btn[disabled] { opacity: 0.6; cursor: not-allowed; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  max-width: var(--container-max);
  margin: 0 auto;
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-ink);
}
.brand-mark {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-accent));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9rem;
}
.brand-text-title { display: block; }
.brand-text-sub {
  display: block;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--color-ink-soft);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}
.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-ink-muted);
  padding: var(--space-2) 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}
.nav-cta { display: flex; align-items: center; gap: var(--space-4); }
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  width: 44px; height: 44px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: "";
  display: block;
  width: 18px; height: 2px;
  background: var(--color-ink);
  position: relative;
  transition: transform 0.2s ease;
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(1100px 500px at 85% -10%, rgba(29,78,216,0.08), transparent 60%),
    var(--color-bg);
  padding: var(--space-9) 0 var(--space-8);
  border-bottom: 1px solid var(--color-border);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--space-8);
  align-items: center;
}
.hero h1 {
  font-size: clamp(2.1rem, 3.6vw, 3.2rem);
  margin: var(--space-4) 0 var(--space-5);
  color: var(--color-ink);
}
.hero h1 .accent { color: var(--color-primary-dark); }
.hero-lede {
  font-size: 1.15rem;
  color: var(--color-ink-muted);
  max-width: 46ch;
  margin-bottom: var(--space-6);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-4); margin-bottom: var(--space-6); }
.hero-panel {
  background: var(--color-bg-dark);
  background-image: linear-gradient(160deg, var(--color-bg-dark), var(--color-bg-dark-alt));
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  color: #fff;
  box-shadow: var(--shadow-lg);
}
.hero-panel-title {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #8fb2e8;
  margin-bottom: var(--space-4);
}
.stat-list { list-style: none; display: flex; flex-direction: column; gap: var(--space-4); }
.stat-item { display: flex; justify-content: space-between; align-items: baseline; border-bottom: 1px solid rgba(255,255,255,0.12); padding-bottom: var(--space-3); }
.stat-item:last-child { border-bottom: none; padding-bottom: 0; }
.stat-value { font-family: var(--font-mono); font-size: 1.5rem; font-weight: 700; color: #fff; }
.stat-label { font-size: 0.85rem; color: #b9cbe8; text-align: right; max-width: 18ch; }

/* ---------- Trust bar ---------- */
.trust-bar {
  padding: var(--space-6) 0;
  border-bottom: 1px solid var(--color-border);
}
.trust-bar .container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  align-items: center;
  justify-content: space-between;
}
.trust-bar-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

/* ---------- Sections ---------- */
section { padding: var(--space-9) 0; }
.section-alt { background: var(--color-bg-alt); }
.section-dark {
  background: linear-gradient(160deg, var(--color-bg-dark), var(--color-bg-dark-alt));
  color: #fff;
}
.section-dark .section-head p { color: #c3d3ec; }
.section-head { max-width: 640px; margin-bottom: var(--space-7); }
.section-head h2 { font-size: clamp(1.6rem, 2.6vw, 2.2rem); margin: var(--space-3) 0 var(--space-3); }
.section-head p { color: var(--color-ink-muted); font-size: 1.05rem; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

/* ---------- Cards / Grids ---------- */
.grid { display: grid; gap: var(--space-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  transition: box-shadow 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: #cbd8f0; }
.card-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  margin-bottom: var(--space-4);
}
.card h3 { font-size: 1.15rem; margin-bottom: var(--space-3); }
.card p { color: var(--color-ink-muted); font-size: 0.98rem; }
.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
  font-weight: 600;
  color: var(--color-primary-dark);
  font-size: 0.92rem;
}

.pillar-number {
  font-family: var(--font-mono);
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: var(--space-3);
}

/* ---------- CTA band ---------- */
.cta-band {
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary-darker));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
}
.cta-band h2 { font-size: clamp(1.4rem, 2.4vw, 1.9rem); margin-bottom: var(--space-2); }
.cta-band p { color: #d7e2f7; max-width: 46ch; }
.cta-band-actions { display: flex; gap: var(--space-4); flex-wrap: wrap; }

/* ---------- Timeline (About) ---------- */
.timeline { display: flex; flex-direction: column; gap: 0; border-left: 2px solid var(--color-border); margin-left: var(--space-2); }
.timeline-item { position: relative; padding: 0 0 var(--space-7) var(--space-6); }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -7px; top: 4px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--color-primary-dark);
  border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--color-border);
}
.timeline-date { font-family: var(--font-mono); font-size: 0.82rem; color: var(--color-accent); font-weight: 600; margin-bottom: var(--space-1); }
.timeline-role { font-size: 1.1rem; font-weight: 700; margin-bottom: var(--space-1); }
.timeline-org { color: var(--color-ink-muted); font-weight: 500; margin-bottom: var(--space-3); }
.timeline-item ul { list-style: none; display: flex; flex-direction: column; gap: var(--space-2); }
.timeline-item li { position: relative; padding-left: var(--space-5); color: var(--color-ink-muted); font-size: 0.97rem; }
.timeline-item li::before { content: "→"; position: absolute; left: 0; color: var(--color-primary); }

/* ---------- Skills grid ---------- */
.skill-chip-group { display: flex; flex-wrap: wrap; gap: var(--space-3); }
.skill-chip {
  padding: var(--space-2) var(--space-4);
  border-radius: 999px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-ink);
}

/* ---------- Services detail ---------- */
.service-block {
  display: grid;
  grid-template-columns: 0.9fr 1.3fr;
  gap: var(--space-7);
  padding: var(--space-8) 0;
  border-bottom: 1px solid var(--color-border);
}
.service-block:last-of-type { border-bottom: none; }
.service-index { font-family: var(--font-mono); color: var(--color-accent); font-weight: 700; font-size: 0.9rem; margin-bottom: var(--space-3); }
.service-block h2 { font-size: 1.6rem; margin-bottom: var(--space-3); }
.service-tagline { color: var(--color-primary-dark); font-weight: 600; margin-bottom: var(--space-4); }
.service-meta-label { font-family: var(--font-mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-ink-soft); margin: var(--space-5) 0 var(--space-2); }
.service-block ul { list-style: none; display: flex; flex-direction: column; gap: var(--space-3); }
.service-block ul li { position: relative; padding-left: var(--space-5); color: var(--color-ink-muted); }
.service-block ul li::before { content: "✓"; position: absolute; left: 0; color: var(--color-accent); font-weight: 700; }

/* ---------- Case studies ---------- */
.case-study {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
  margin-bottom: var(--space-6);
  background: #fff;
}
.case-study-header { display: flex; justify-content: space-between; align-items: flex-start; gap: var(--space-5); flex-wrap: wrap; margin-bottom: var(--space-5); }
.case-study-header h2 { font-size: 1.5rem; max-width: 60ch; }
.case-study-client { font-family: var(--font-mono); font-size: 0.82rem; color: var(--color-ink-soft); margin-top: var(--space-2); }
.case-study-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); margin-bottom: var(--space-6); }
.case-study-col h4 { font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-primary-dark); margin-bottom: var(--space-2); }
.case-study-col p { color: var(--color-ink-muted); font-size: 0.96rem; }
.result-strip { display: flex; flex-wrap: wrap; gap: var(--space-5); padding-top: var(--space-5); border-top: 1px solid var(--color-border); }
.result-item { min-width: 160px; }
.result-value { font-family: var(--font-mono); font-size: 1.6rem; font-weight: 700; color: var(--color-primary-dark); }
.result-label { font-size: 0.88rem; color: var(--color-ink-muted); }

/* ---------- Blog post featured image ---------- */
.post-featured-image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

/* ---------- Blog ---------- */
.post-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  height: 100%;
}
.post-status {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-1) var(--space-3);
  border-radius: 999px;
  background: var(--color-bg-alt);
  color: var(--color-ink-soft);
  border: 1px solid var(--color-border);
}
.post-card h3 { font-size: 1.1rem; }
.post-card p { color: var(--color-ink-muted); font-size: 0.95rem; }
.blog-empty-note {
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  text-align: center;
  color: var(--color-ink-muted);
  margin-top: var(--space-7);
}

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-8); align-items: start; }
.form-field { margin-bottom: var(--space-5); }
.form-field label { display: block; font-weight: 600; font-size: 0.92rem; margin-bottom: var(--space-2); }
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  font-family: inherit;
  font-size: 0.98rem;
  color: var(--color-ink);
  background: #fff;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-primary-dark);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}
.form-note { font-size: 0.85rem; color: var(--color-ink-soft); margin-top: var(--space-3); }
.contact-info-card {
  background: var(--color-bg-dark);
  background-image: linear-gradient(160deg, var(--color-bg-dark), var(--color-bg-dark-alt));
  color: #fff;
  border-radius: var(--radius-lg);
  padding: var(--space-7);
}
.contact-info-card h3 { font-size: 1.2rem; margin-bottom: var(--space-5); }
.contact-info-list { list-style: none; display: flex; flex-direction: column; gap: var(--space-5); }
.contact-info-list a, .contact-info-list span { color: #fff; font-weight: 600; }
.contact-info-label { display: block; font-family: var(--font-mono); font-size: 0.75rem; color: #93b3e0; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: var(--space-1); }
.contact-info-list a:hover { color: #cfe0fb; }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-bg-dark); color: #cfdcf1; padding: var(--space-8) 0 var(--space-6); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: var(--space-6); margin-bottom: var(--space-7); }
.footer-brand { display: flex; align-items: center; gap: var(--space-3); margin-bottom: var(--space-4); color: #fff; font-weight: 700; }
.footer-desc { color: #9fb3d4; font-size: 0.92rem; max-width: 34ch; }
.footer-col h4 { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.06em; color: #7f9bc9; margin-bottom: var(--space-4); font-family: var(--font-mono); }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: var(--space-3); }
.footer-col a { color: #cfdcf1; font-size: 0.94rem; }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: var(--space-5);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: 0.85rem;
  color: #8ba3cc;
}

/* ---------- Breadcrumb / page hero (inner pages) ---------- */
.page-hero {
  padding: var(--space-8) 0 var(--space-7);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}
.page-hero h1 { font-size: clamp(2rem, 3.2vw, 2.6rem); margin: var(--space-3) 0 var(--space-4); }
.page-hero p { color: var(--color-ink-muted); font-size: 1.05rem; max-width: 62ch; }

/* ---------- Utility ---------- */
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-4 { margin-bottom: var(--space-4); }
.text-muted { color: var(--color-ink-muted); }
.divider { height: 1px; background: var(--color-border); margin: var(--space-7) 0; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .service-block { grid-template-columns: 1fr; gap: var(--space-4); }
  .case-study-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }

  /* Switch to the hamburger nav here (not at 720px) — the full desktop nav
     (logo + 6 links + Book a Call) needs ~880px to fit without wrapping,
     so tablets and landscape phones need the compact nav too. */
  .nav-links, .nav-cta .btn-secondary { display: none; }
  .nav-toggle { display: flex; }
  body.nav-open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-5);
    gap: var(--space-4);
  }
}

@media (max-width: 720px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .cta-band { flex-direction: column; align-items: flex-start; }
  .footer-grid { grid-template-columns: 1fr; }
  .trust-bar .container { justify-content: flex-start; }
}