/* Tech Rajeshwar — site shell */
:root {
  --bg: #0b0d12;
  --surface: #12151c;
  --surface-2: #1a1e28;
  --border: #2a3040;
  --text: #eef0f4;
  --muted: #9aa3b2;
  --accent: #38bdf8;
  --accent-dim: rgba(56, 189, 248, 0.15);
  --radius: 12px;
  --radius-sm: 8px;
  --font: "DM Sans", system-ui, sans-serif;
  --max: 72rem;
  --header-h: 4rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(10px);
}

.site-header__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.03em;
  color: var(--text);
  text-decoration: none;
}

.logo:hover {
  color: var(--accent);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  cursor: pointer;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav a {
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
}

.nav a:hover {
  color: var(--text);
  background: var(--surface-2);
  text-decoration: none;
}

.nav a[aria-current="page"] {
  color: var(--accent);
  background: var(--accent-dim);
}

/* Main */
main {
  flex: 1;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
}

.section--tight {
  padding-top: clamp(1.5rem, 4vw, 2rem);
}

.section--border-top {
  border-top: 1px solid var(--border);
}

.section--center {
  text-align: center;
  max-width: 36rem;
  margin: 0 auto;
}

.section--center .section__intro {
  margin-left: auto;
  margin-right: auto;
}

.mt-2 {
  margin-top: 2rem;
}

/* Hero */
.hero {
  padding: clamp(2.5rem, 8vw, 5rem) 0 clamp(3rem, 10vw, 6rem);
  border-bottom: 1px solid var(--border);
  background: radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-dim), transparent);
}

.hero__inner {
  max-width: 42rem;
}

.hero__eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.hero__lead {
  margin: 0 0 1.75rem;
  font-size: 1.125rem;
  color: var(--muted);
  max-width: 36rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.25rem;
  font: inherit;
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover {
  text-decoration: none;
}

.btn--primary {
  background: var(--accent);
  color: #04202e;
}

.btn--primary:hover {
  filter: brightness(1.08);
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn--ghost:hover {
  border-color: var(--muted);
  background: var(--surface);
}

/* Cards / grid */
.section__title {
  margin: 0 0 0.5rem;
  font-size: clamp(1.5rem, 3vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section__intro {
  margin: 0 0 2rem;
  color: var(--muted);
  max-width: 40rem;
}

.grid-3 {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
}

.card {
  padding: 1.35rem 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  font-weight: 600;
}

.card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--muted);
}

/* Page header (inner pages) */
.page-head {
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.page-head h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.page-head p {
  margin: 0;
  color: var(--muted);
  max-width: 36rem;
}

.prose {
  max-width: 40rem;
}

.prose p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.prose p:last-child {
  margin-bottom: 0;
}

.prose ul {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  color: var(--muted);
}

/* Contact */
.contact-layout {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
  align-items: start;
}

.contact-card {
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.contact-card h2 {
  margin: 0 0 1rem;
  font-size: 1.125rem;
}

.contact-row {
  margin-bottom: 1rem;
  font-size: 0.9375rem;
}

.contact-row:last-child {
  margin-bottom: 0;
}

.contact-row dt {
  margin: 0 0 0.2rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.contact-row dd {
  margin: 0;
  color: var(--text);
}

.form label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--muted);
}

.form input,
.form textarea {
  width: 100%;
  margin-bottom: 1rem;
  padding: 0.65rem 0.85rem;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.form input:focus,
.form textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.form textarea {
  min-height: 8rem;
  resize: vertical;
}

.form .btn {
  width: 100%;
}

.form-note {
  margin: 0.75rem 0 0;
  font-size: 0.8125rem;
  color: var(--muted);
}

/* Footer */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  background: var(--surface);
}

.site-footer__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-footer p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--muted);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-nav a {
  font-size: 0.875rem;
  color: var(--muted);
  text-decoration: none;
}

.footer-nav a:hover {
  color: var(--accent);
  text-decoration: none;
}

/* Mobile nav */
@media (max-width: 640px) {
  .nav-toggle {
    display: block;
  }

  .nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem 1.25rem 1rem;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    display: none;
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    padding: 0.75rem 1rem;
  }
}