:root {
  --bg: #06101d;
  --bg-soft: #0a1727;
  --panel: rgba(10, 24, 40, 0.78);
  --panel-strong: #0d1d30;
  --border: rgba(147, 181, 211, 0.16);
  --border-strong: rgba(93, 204, 255, 0.34);
  --text: #edf6ff;
  --muted: #9eb0c3;
  --faint: #6e8298;
  --cyan: #67d5ff;
  --cyan-strong: #23bdf8;
  --green: #71e4b6;
  --amber: #ffd479;
  --radius: 18px;
  --shadow: 0 22px 70px rgba(0,0,0,.28);
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 12% 8%, rgba(25, 135, 205, .12), transparent 27rem),
    radial-gradient(circle at 90% 18%, rgba(55, 211, 162, .08), transparent 24rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }

.ambient {
  position: fixed;
  border-radius: 999px;
  filter: blur(100px);
  opacity: .12;
  pointer-events: none;
  z-index: -1;
}
.ambient-one { width: 24rem; height: 24rem; background: #0fb8ff; top: 10rem; left: -10rem; }
.ambient-two { width: 30rem; height: 30rem; background: #35d8a0; right: -16rem; top: 28rem; }

.shell { width: min(var(--max), calc(100% - 40px)); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--border);
  background: rgba(6, 16, 29, .84);
  backdrop-filter: blur(18px);
}

.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
}
.brand-mark {
  width: 38px;
  height: 38px;
  border: 1px solid var(--border-strong);
  border-radius: 11px;
  display: grid;
  place-items: center;
  color: var(--cyan);
  font: 800 13px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .08em;
  box-shadow: inset 0 0 22px rgba(35,189,248,.06);
}
.brand strong, .brand small { display: block; }
.brand strong { font-size: 14px; letter-spacing: .02em; }
.brand small { color: var(--muted); font-size: 11px; margin-top: 1px; }

.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 650;
}
.nav-links a:hover { color: var(--text); }
.nav-links .linkedin-link { color: var(--cyan); }

.nav-toggle {
  display: none;
  color: var(--text);
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 10px;
  padding: 8px 11px;
}

.hero {
  padding: 104px 0 62px;
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(340px, .88fr);
  align-items: center;
  gap: 68px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--cyan);
  font: 760 12px/1.4 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .16em;
}
.owner { margin: 0 0 24px; color: var(--muted); font-size: 13px; }
.owner a { color: var(--text); text-decoration-color: rgba(103,213,255,.5); text-underline-offset: 3px; }

.hero h1 {
  margin: 0;
  max-width: 820px;
  font-size: clamp(48px, 6.4vw, 84px);
  line-height: .99;
  letter-spacing: -.055em;
}
.hero h1 span {
  color: transparent;
  background: linear-gradient(90deg, #eef8ff 3%, #70d9ff 48%, #71e4b6 96%);
  background-clip: text;
  -webkit-background-clip: text;
}
.hero-text {
  max-width: 760px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 17px;
}
.hero-text strong { color: #d9efff; font-weight: 680; }

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 34px; }

.button {
  min-height: 46px;
  padding: 0 18px;
  border-radius: 11px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  text-decoration: none;
  font-weight: 760;
  font-size: 13px;
  cursor: pointer;
}
.button.primary {
  background: linear-gradient(135deg, #1ebff9, #66d6ff);
  color: #03101b;
  border-color: transparent;
  box-shadow: 0 10px 30px rgba(35, 189, 248, .17);
}
.button.secondary {
  background: rgba(9, 24, 40, .72);
  color: var(--text);
}
.button.small { min-height: 38px; padding-inline: 14px; margin-top: 18px; }

.platform-strip { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 30px; }
.platform-strip span {
  border: 1px solid var(--border);
  background: rgba(9, 22, 37, .58);
  color: #a9bfd3;
  border-radius: 999px;
  padding: 7px 10px;
  font: 650 11px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.terminal-card {
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(12, 29, 48, .88), rgba(7, 19, 32, .94));
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transform: translateY(8px);
}
.terminal-top {
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 15px;
  border-bottom: 1px solid var(--border);
  color: var(--faint);
  font: 600 11px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.terminal-dots { display: flex; gap: 6px; }
.terminal-dots i { width: 8px; height: 8px; border-radius: 50%; background: #4d6479; display: block; }
.terminal-dots i:nth-child(2) { background: #66798a; }
.terminal-dots i:nth-child(3) { background: #8295a6; }

.terminal-card pre {
  margin: 0;
  padding: 26px;
  min-height: 348px;
  overflow: auto;
  color: #d8e9f6;
  font: 500 12.5px/1.72 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.terminal-card .muted { color: #8fa4b7; }
.terminal-card .value { color: var(--green); }
.terminal-card .comment { color: #71869a; }
.terminal-foot {
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 13px 16px;
  color: var(--faint);
  font: 700 10px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .12em;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--border);
  background: rgba(9, 23, 38, .54);
  border-radius: var(--radius);
  overflow: hidden;
}
.stats article { padding: 22px; border-right: 1px solid var(--border); }
.stats article:last-child { border-right: 0; }
.stats strong { display: block; color: var(--cyan); font: 780 26px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.stats span { display: block; color: var(--muted); font-size: 12px; margin-top: 8px; }

.section { padding: 96px 0 14px; }
.section-heading { max-width: 780px; margin-bottom: 35px; }
.section-heading h2 {
  margin: 0;
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.07;
  letter-spacing: -.04em;
}
.section-heading > p:last-child { color: var(--muted); margin: 16px 0 0; font-size: 15px; }

.command-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 16px;
}
.track-tabs {
  border: 1px solid var(--border);
  background: rgba(8, 21, 35, .64);
  border-radius: var(--radius);
  padding: 9px;
  height: max-content;
}
.track-tab {
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 13px 12px;
  border-radius: 10px;
  text-align: left;
  cursor: pointer;
  font-weight: 700;
}
.track-tab:hover { color: var(--text); background: rgba(255,255,255,.025); }
.track-tab.active { color: #06131f; background: linear-gradient(135deg, #6ad7ff, #73e3b7); }

.command-panel {
  border: 1px solid var(--border);
  background: linear-gradient(155deg, rgba(12, 30, 49, .9), rgba(8, 20, 34, .88));
  border-radius: var(--radius);
  padding: 24px;
}
.command-kicker, .progress-row {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
}
.command-kicker {
  color: var(--faint);
  font: 700 10px/1.3 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .12em;
}
.command-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 24px;
  margin-top: 36px;
}
.command-grid h3 { font-size: 31px; margin: 7px 0 10px; letter-spacing: -.03em; }
.command-grid p { color: var(--muted); margin: 0; }
.mini-label { color: var(--cyan) !important; font: 700 10px/1.4 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; letter-spacing: .13em; }
.next-action {
  padding: 18px;
  border: 1px solid rgba(113,228,182,.18);
  background: rgba(35, 113, 91, .07);
  border-radius: 13px;
}
.next-action span { display: block; color: var(--green); font: 700 10px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; letter-spacing: .12em; margin-bottom: 10px; }
.next-action strong { display: block; font-size: 13px; line-height: 1.65; color: #d9eee6; }
.progress-row { margin-top: 28px; color: var(--muted); font-size: 11px; }
.progress-row strong { color: var(--text); }
.progress { height: 5px; background: rgba(255,255,255,.06); border-radius: 999px; margin-top: 9px; overflow: hidden; }
.progress i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--cyan-strong), var(--green)); transition: width .25s ease; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
.card {
  min-height: 360px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  background: linear-gradient(165deg, rgba(11, 27, 45, .74), rgba(7, 19, 32, .65));
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 18px 46px rgba(0,0,0,.08);
}
.card.featured { border-color: rgba(103,213,255,.36); box-shadow: inset 0 0 50px rgba(35,189,248,.035); }
.card.cloud-card { border-color: rgba(113,228,182,.22); }
.card-number { color: var(--cyan); font: 740 10px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; letter-spacing: .12em; }
.card h3 { margin: 15px 0 8px; font-size: 22px; letter-spacing: -.025em; }
.card p { color: var(--muted); font-size: 14px; margin: 0; }
.card ul { color: #b4c7d7; font-size: 12px; padding-left: 18px; margin: 20px 0 24px; }
.card li { margin-bottom: 7px; }
.card a, .text-button {
  margin-top: auto;
  color: var(--cyan);
  text-decoration: none;
  font-size: 12px;
  font-weight: 760;
}
.text-button { padding: 0; border: 0; background: transparent; width: max-content; cursor: pointer; }

.cloud-section {
  margin-top: 96px;
  padding: 92px 0;
  border-block: 1px solid var(--border);
  background:
    linear-gradient(180deg, rgba(15, 39, 61, .52), rgba(5, 16, 28, .75)),
    radial-gradient(circle at 65% 20%, rgba(31,187,249,.10), transparent 27rem);
}
.cloud-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.cloud-grid article {
  min-height: 250px;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: rgba(6, 18, 31, .62);
}
.cloud-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: rgba(103,213,255,.08);
  border: 1px solid rgba(103,213,255,.18);
  color: var(--cyan);
  font: 800 10px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.cloud-grid h3 { font-size: 18px; margin: 19px 0 10px; }
.cloud-grid p { color: var(--muted); font-size: 13px; margin: 0; }

.cloud-flow {
  margin-top: 30px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 16px;
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 10px;
  background: rgba(4, 15, 26, .56);
}
.cloud-flow > div { padding: 8px; }
.cloud-flow span { display: block; color: var(--cyan); font: 720 10px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.cloud-flow strong { display: block; margin-top: 7px; font-size: 14px; }
.cloud-flow small { display: block; color: var(--faint); font-size: 10px; margin-top: 3px; }
.cloud-flow i { color: var(--faint); font-style: normal; }

.roadmap { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--border); }
.roadmap li {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 18px;
  padding: 23px 0;
  border-bottom: 1px solid var(--border);
}
.roadmap > li > span { color: var(--cyan); font: 750 12px/1.4 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.roadmap h3 { margin: 0; font-size: 18px; }
.roadmap p { color: var(--muted); margin: 6px 0 0; font-size: 13px; }

.reference-flow {
  display: grid;
  grid-template-columns: 1fr auto 1.15fr auto 1.15fr;
  gap: 14px;
  align-items: center;
}
.flow-stack { display: grid; gap: 10px; }
.flow-node {
  border: 1px solid var(--border);
  background: rgba(9, 23, 38, .7);
  border-radius: 13px;
  padding: 17px;
}
.flow-node.control { border-color: rgba(103,213,255,.34); }
.flow-node.cloud { border-color: rgba(113,228,182,.22); }
.flow-node small { display: block; color: var(--cyan); font: 700 9px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; letter-spacing: .11em; margin-bottom: 7px; }
.flow-node strong { display: block; font-size: 14px; }
.flow-node span { display: block; color: var(--faint); font-size: 10px; margin-top: 4px; }
.arrow { color: var(--faint); }

.linkedin-section {
  margin-top: 96px;
  padding: 58px 0;
  border-block: 1px solid var(--border);
  background: linear-gradient(120deg, rgba(11, 40, 60, .7), rgba(10, 31, 39, .48));
}
.linkedin-wrap { display: flex; justify-content: space-between; align-items: center; gap: 36px; }
.linkedin-wrap > div { max-width: 730px; }
.linkedin-wrap h2 { font-size: 36px; margin: 0; letter-spacing: -.035em; }
.linkedin-wrap p:last-child { color: var(--muted); margin-bottom: 0; }

.safety-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 13px; }
.safety-grid article { padding: 19px; border: 1px solid var(--border); background: rgba(8, 21, 35, .56); border-radius: 14px; }
.safety-grid strong { color: #dcebf6; font-size: 13px; }
.safety-grid p { color: var(--muted); font-size: 11.5px; margin: 8px 0 0; }

.footer { margin-top: 100px; padding: 30px 0; border-top: 1px solid var(--border); background: rgba(4, 13, 23, .7); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { color: var(--muted); text-decoration: none; font-size: 12px; }

@media (max-width: 1020px) {
  .hero { grid-template-columns: 1fr; gap: 40px; padding-top: 76px; }
  .terminal-card { max-width: 720px; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .cloud-grid { grid-template-columns: repeat(2, 1fr); }
  .safety-grid { grid-template-columns: repeat(2, 1fr); }
  .reference-flow { grid-template-columns: 1fr; }
  .reference-flow .arrow { transform: rotate(90deg); text-align: center; }
}

@media (max-width: 760px) {
  .shell { width: min(100% - 28px, var(--max)); }
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute;
    top: 71px;
    left: 14px;
    right: 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: #0a1828;
    box-shadow: var(--shadow);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px; }
  .hero { padding-top: 58px; }
  .hero h1 { font-size: clamp(43px, 14vw, 68px); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stats article:nth-child(2) { border-right: 0; }
  .stats article:nth-child(-n+2) { border-bottom: 1px solid var(--border); }
  .command-layout { grid-template-columns: 1fr; }
  .track-tabs { display: grid; grid-template-columns: repeat(2, 1fr); }
  .command-grid { grid-template-columns: 1fr; }
  .cards, .cloud-grid, .safety-grid { grid-template-columns: 1fr; }
  .cloud-flow { grid-template-columns: 1fr; }
  .cloud-flow i { transform: rotate(90deg); text-align: center; }
  .linkedin-wrap { align-items: flex-start; flex-direction: column; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .button { width: 100%; }
  .stats { grid-template-columns: 1fr; }
  .stats article { border-right: 0; border-bottom: 1px solid var(--border); }
  .stats article:last-child { border-bottom: 0; }
  .track-tabs { grid-template-columns: 1fr; }
  .terminal-card pre { padding: 18px; font-size: 11px; }
  .roadmap li { grid-template-columns: 48px 1fr; }
}


/* Linux / UNIX Engineering Lab */
.linux-terminal .terminal-screen {
  min-height: 184px;
  padding: 26px 26px 14px;
  background: rgba(2, 11, 20, .54);
  font: 500 13px/1.75 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.terminal-line { min-width: 0; overflow-wrap: anywhere; }
.terminal-muted { color: #64798c; }
.prompt { color: var(--green); font-weight: 700; }
.terminal-output { color: #d7e8f4; white-space: pre-wrap; margin-top: 5px; }
.terminal-concept {
  padding: 16px 26px 18px;
  border-top: 1px solid var(--border);
  background: rgba(9, 24, 39, .45);
}
.terminal-concept span {
  color: var(--cyan);
  font: 720 9px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .13em;
}
.terminal-concept strong { display: block; margin-top: 7px; font-size: 14px; }
.terminal-concept p { color: var(--muted); font-size: 11.5px; margin: 5px 0 0; }
.terminal-actions {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  border-top: 1px solid var(--border);
}
.terminal-control {
  min-height: 40px;
  border: 0;
  border-right: 1px solid var(--border);
  color: #a9bfd1;
  background: rgba(8, 19, 32, .78);
  cursor: pointer;
  font: 700 10px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.terminal-control:last-child { border-right: 0; }
.terminal-control:hover, .terminal-control:focus-visible { color: var(--text); background: rgba(20, 42, 64, .78); }

.linux-lab-section { scroll-margin-top: 90px; }
.linux-lab-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, .75fr);
  gap: 16px;
}
.linux-console-card, .linux-radar, .concept-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(165deg, rgba(11, 27, 45, .76), rgba(7, 19, 32, .7));
}
.linux-console-card { overflow: hidden; }
.linux-console-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 17px;
  border-bottom: 1px solid var(--border);
  color: var(--faint);
  font: 700 10px/1.2 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .10em;
}
.linux-console-header > div { display: flex; gap: 8px; align-items: center; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(113, 228, 182, .06); }
.linux-console {
  min-height: 210px;
  padding: 28px;
  background: #04101c;
  color: #d8e8f4;
  font: 500 13px/1.75 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  outline: none;
}
.linux-console:focus-visible { box-shadow: inset 0 0 0 2px rgba(103, 213, 255, .38); }
.linux-explainer { padding: 22px 24px 24px; }
.linux-explainer h3 { margin: 7px 0 8px; font-size: 22px; }
.linux-explainer p { color: var(--muted); margin: 0; font-size: 13px; }
.linux-explainer code, .concept-card code, .command-group code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.operator-note {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px;
  margin-top: 16px;
  padding: 13px 14px;
  border: 1px solid rgba(113, 228, 182, .15);
  background: rgba(47, 125, 98, .05);
  border-radius: 11px;
  font-size: 11.5px;
}
.operator-note strong { color: var(--green); }
.operator-note span { color: #b6c9d5; }

.linux-radar { padding: 23px; }
.linux-radar .eyebrow { margin-bottom: 18px; }
.radar-row {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 11px 0;
  border-bottom: 1px solid var(--border);
  font-size: 11.5px;
}
.radar-row span { color: var(--muted); }
.radar-row strong { text-align: right; color: #dcebf5; }
.radar-next {
  margin-top: 17px;
  padding: 15px;
  border: 1px solid rgba(255, 212, 121, .17);
  background: rgba(129, 96, 32, .055);
  border-radius: 12px;
}
.radar-next span { color: var(--amber); font: 720 9px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; letter-spacing: .13em; }
.radar-next strong { display: block; margin-top: 8px; font-size: 12px; }
.radar-next p { color: var(--muted); font-size: 10.5px; margin: 6px 0 0; }
.radar-verified { color: var(--faint); font-size: 9.5px; margin: 15px 0 7px; }
.text-link { color: var(--cyan); font-size: 11px; text-decoration: none; font-weight: 700; }

.lesson-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
}
.lesson-tab {
  min-height: 36px;
  border: 1px solid var(--border);
  background: rgba(8, 21, 35, .56);
  color: var(--muted);
  border-radius: 999px;
  padding: 0 12px;
  cursor: pointer;
  font: 700 10px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.lesson-tab.active {
  color: #06131f;
  border-color: transparent;
  background: linear-gradient(135deg, #6ad7ff, #73e3b7);
}
.lesson-tab:hover { color: var(--text); }

.linux-deep-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 24px;
}
.concept-card { padding: 22px; }
.concept-card h3 { margin: 8px 0 10px; font-size: 18px; }
.concept-card p { color: var(--muted); font-size: 12px; margin: 0; }
.concept-card pre {
  overflow: auto;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #04101c;
  color: #d5e7f3;
  font: 500 11px/1.6 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.pipeline-visual {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 7px;
  margin: 16px 0;
}
.pipeline-visual span {
  border: 1px solid var(--border);
  background: #061422;
  border-radius: 8px;
  padding: 8px 9px;
  color: #d6e8f5;
  font: 650 10px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.pipeline-visual i { color: var(--cyan); font-style: normal; font-size: 10px; }
.concept-list { margin: 14px 0 0; padding-left: 18px; color: var(--muted); font-size: 11.5px; }
.concept-list li { margin-bottom: 6px; }

.command-matrix {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 24px;
}
.command-group {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(8, 21, 35, .54);
}
.command-group h3 { font-size: 13px; margin: 0 0 12px; }
.command-group code {
  display: inline-block;
  margin: 3px 4px 3px 0;
  padding: 6px 7px;
  border-radius: 7px;
  border: 1px solid var(--border);
  color: #b8cedd;
  background: #06131f;
  font-size: 9.5px;
}

@media (max-width: 1020px) {
  .linux-lab-grid { grid-template-columns: 1fr; }
  .linux-deep-grid { grid-template-columns: 1fr; }
  .command-matrix { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .command-matrix { grid-template-columns: 1fr; }
  .linux-console { padding: 20px; font-size: 11.5px; }
  .operator-note { grid-template-columns: 1fr; }
  .terminal-actions { grid-template-columns: 1fr; }
  .terminal-control { border-right: 0; border-bottom: 1px solid var(--border); }
  .terminal-control:last-child { border-bottom: 0; }
}

/* Interactive Linux Engineering terminal */
.shell-mode-banner{display:flex;gap:10px;align-items:center;padding:10px 17px;border-bottom:1px solid var(--border);background:rgba(113,228,182,.045);font-size:10px}
.shell-mode-banner strong{color:var(--green);font:760 9px/1 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:.11em}
.shell-mode-banner span{color:var(--muted)}
.interactive-shell .linux-console{min-height:260px;max-height:390px;overflow-y:auto}
.terminal-history{margin-top:8px}.terminal-error{color:#ffd49a!important}
.terminal-entry{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:9px;padding:12px 16px;border-top:1px solid var(--border);border-bottom:1px solid var(--border);background:#04101c}
.terminal-entry-prompt{white-space:nowrap;font:700 11px/1 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.terminal-entry input{width:100%;min-width:0;border:0;outline:0;background:transparent;color:#e3f0f8;font:600 12px/1.3 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.terminal-entry input::placeholder{color:#60778b}
.terminal-entry button{min-height:34px;border:1px solid rgba(103,213,255,.24);border-radius:8px;padding:0 12px;background:rgba(103,213,255,.08);color:var(--cyan);font-weight:760;cursor:pointer}
.terminal-shortcuts{display:flex;flex-wrap:wrap;align-items:center;gap:8px 12px;padding:9px 16px;color:var(--faint);font-size:9.5px}
.terminal-shortcuts kbd{padding:2px 5px;border:1px solid var(--border);border-radius:5px;color:#a8bccd;font:650 9px/1.2 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.terminal-shortcuts button{border:0;background:transparent;color:var(--cyan);cursor:pointer;font-size:9.5px;font-weight:700}
.command-suggestions{display:flex;flex-wrap:wrap;gap:7px;padding:0 16px 15px}
.command-suggestions button{border:1px solid var(--border);border-radius:999px;background:rgba(8,21,35,.62);color:#a9bfd0;padding:6px 9px;cursor:pointer;font:670 9.5px/1 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.command-suggestions button:hover,.command-suggestions button:focus-visible{color:#05111d;border-color:transparent;background:linear-gradient(135deg,#6ad7ff,#73e3b7)}
.command-coach{border-top:1px solid var(--border)}.coach-meta{display:flex;justify-content:space-between;gap:16px}
.coach-topic{color:var(--faint);font:700 9px/1 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:.11em}
.coach-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:18px}
.coach-box{padding:13px;border:1px solid var(--border);border-radius:11px;background:rgba(4,16,28,.42)}
.coach-box>span{display:block;margin-bottom:7px;color:var(--cyan);font:740 8.5px/1 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:.11em}
.coach-box p{margin:0;color:#aebfcd;font-size:10.5px;line-height:1.6}
@media(max-width:760px){.terminal-entry{grid-template-columns:1fr auto}.terminal-entry-prompt{grid-column:1/-1}.coach-grid{grid-template-columns:1fr}}


/* v6: Linux Engineering is intentionally terminal-only */
.linux-lab-section .linux-lab-grid {
  grid-template-columns: minmax(0, 1fr);
  max-width: 1120px;
  margin-inline: auto;
}
.linux-lab-section .linux-console-card {
  width: 100%;
}
.linux-lab-section .linux-console {
  min-height: 360px;
  font-size: 15px;
  line-height: 1.75;
}
.linux-lab-section .terminal-entry input {
  font-size: 15px;
}
.linux-lab-section .terminal-entry-prompt {
  font-size: 13px;
}
.linux-lab-section .linux-explainer h3 {
  font-size: 25px;
}
.linux-lab-section .linux-explainer > p {
  font-size: 15px;
  line-height: 1.7;
}
.linux-lab-section .coach-box p {
  font-size: 13px;
  line-height: 1.65;
}


/* ============================================================
   DB RESILIENCE DESIGN SYSTEM V7
   Larger typography, stronger hierarchy, controlled color.
   ============================================================ */

:root {
  --bg: #050c16;
  --bg-soft: #081725;
  --panel: rgba(10, 26, 43, .88);
  --panel-strong: #0c2034;
  --panel-raised: #102941;

  --border: rgba(154, 196, 226, .19);
  --border-strong: rgba(83, 218, 255, .45);

  --text: #f4f9fd;
  --muted: #b3c5d3;
  --faint: #7f96a9;

  --cyan: #52ddff;
  --cyan-strong: #19c7ff;
  --green: #63efbd;
  --blue: #7896ff;
  --amber: #ffbf58;
  --orange: #ff8d6c;
  --violet: #b39cff;

  --radius: 20px;
  --shadow: 0 28px 80px rgba(0, 0, 0, .32);
  --max: 1240px;
}

html {
  scroll-padding-top: 92px;
}

body {
  font-size: 17px;
  line-height: 1.66;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 8% 7%, rgba(30, 167, 255, .17), transparent 30rem),
    radial-gradient(circle at 92% 10%, rgba(98, 239, 189, .10), transparent 29rem),
    radial-gradient(circle at 78% 48%, rgba(120, 150, 255, .08), transparent 32rem),
    linear-gradient(180deg, #050c16 0%, #06111e 44%, #050c16 100%);
}

.ambient-one {
  width: 30rem;
  height: 30rem;
  background: #16c6ff;
  opacity: .16;
}
.ambient-two {
  width: 34rem;
  height: 34rem;
  background: #60efbb;
  opacity: .10;
}

/* Header / navigation */
.site-header {
  background: rgba(5, 12, 22, .88);
  border-bottom-color: rgba(121, 190, 231, .19);
}

.nav {
  min-height: 80px;
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 13px;
  font-size: 14px;
  background: linear-gradient(145deg, rgba(82,221,255,.11), rgba(120,150,255,.07));
  box-shadow: inset 0 0 26px rgba(82, 221, 255, .08), 0 8px 28px rgba(0,0,0,.18);
}

.brand strong {
  font-size: 16px;
}

.brand small {
  font-size: 12px;
  color: #9eb5c7;
}

.nav-links {
  gap: 25px;
}

.nav-links a {
  position: relative;
  font-size: 14.5px;
  font-weight: 700;
  color: #a9bdcc;
  transition: color .18s ease;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -9px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--cyan), var(--green));
  transition: right .18s ease;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-links a:hover::after {
  right: 0;
}

.nav-links .linkedin-link {
  color: #6fe4ff;
}

/* Hero */
.hero {
  min-height: 720px;
  padding: 110px 0 76px;
  grid-template-columns: minmax(0, 1.07fr) minmax(400px, .93fr);
  gap: 76px;
}

.eyebrow {
  font-size: 12.5px;
  color: var(--cyan);
}

.owner {
  font-size: 14px;
  margin-bottom: 28px;
}

.hero h1 {
  display: grid;
  gap: 2px;
  max-width: 900px;
  font-size: clamp(58px, 6.2vw, 92px);
  line-height: .98;
  letter-spacing: -.058em;
}

.hero h1 > span {
  display: block;
}

.hero-enterprise {
  color: #f7fbff;
}

.hero-cloud {
  color: transparent;
  background: linear-gradient(90deg, #f7fbff 0%, #75dcff 58%, #7998ff 100%);
  background-clip: text;
  -webkit-background-clip: text;
}

.hero-resilience {
  color: transparent;
  background: linear-gradient(90deg, #65dfff 0%, #63efbd 70%, #abf3c9 100%);
  background-clip: text;
  -webkit-background-clip: text;
}

.hero-text {
  max-width: 800px;
  margin-top: 32px;
  font-size: 18px;
  line-height: 1.72;
  color: #b8c9d6;
}

.hero-text strong {
  color: #e7f6ff;
}

.hero-actions {
  margin-top: 38px;
}

.button {
  min-height: 50px;
  padding: 0 20px;
  font-size: 14px;
  border-radius: 12px;
}

.button.primary {
  background: linear-gradient(135deg, #29ccff, #66e4c2);
  box-shadow: 0 14px 38px rgba(35, 197, 247, .19);
}

.button.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 48px rgba(35, 197, 247, .24);
}

.button.secondary {
  background: rgba(11, 29, 47, .82);
  border-color: rgba(142, 194, 226, .21);
}

.platform-strip {
  gap: 10px;
  margin-top: 34px;
}

.platform-strip span {
  padding: 8px 12px;
  font-size: 11.5px;
  color: #bdd0de;
  background: rgba(11, 28, 45, .72);
  border-color: rgba(139, 191, 223, .18);
}

/* Hero architecture visual — deliberately not a terminal */
.hero-architecture {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(105, 206, 255, .28);
  border-radius: 24px;
  padding: 22px;
  background:
    radial-gradient(circle at 78% 5%, rgba(120,150,255,.14), transparent 17rem),
    linear-gradient(155deg, rgba(13, 37, 59, .96), rgba(7, 20, 34, .96));
  box-shadow: 0 34px 100px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,.035);
}

.hero-architecture::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 60%;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--green), transparent);
}

.arch-header,
.arch-control {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.arch-header {
  color: var(--faint);
  font: 750 10px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .13em;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
}

.arch-header strong {
  color: #bcd2e2;
  font-size: 10px;
}

.arch-focus {
  margin: 20px 0 16px;
  padding: 22px;
  border: 1px solid rgba(255,191,88,.24);
  border-radius: 16px;
  background:
    linear-gradient(135deg, rgba(255,191,88,.075), rgba(82,221,255,.055));
}

.arch-focus span,
.arch-control span,
.arch-node span {
  display: block;
  color: var(--faint);
  font: 760 9.5px/1.2 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .12em;
}

.arch-focus span {
  color: var(--amber);
}

.arch-focus strong {
  display: block;
  margin-top: 10px;
  font-size: 27px;
  line-height: 1.15;
  letter-spacing: -.025em;
}

.arch-focus p {
  margin: 9px 0 0;
  color: #aebfcd;
  font-size: 14px;
}

.arch-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 11px;
}

.arch-node {
  position: relative;
  min-height: 105px;
  padding: 17px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(5, 18, 31, .62);
}

.arch-node::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 0;
  width: 46px;
  height: 2px;
  background: var(--cyan);
}

.arch-node.aurora::before { background: linear-gradient(90deg, var(--amber), var(--cyan)); }
.arch-node.postgres::before { background: var(--blue); }
.arch-node.db2::before { background: var(--green); }
.arch-node.oracle::before { background: var(--orange); }

.arch-node strong {
  display: block;
  margin-top: 13px;
  font-size: 17px;
}

.arch-control {
  margin-top: 14px;
  padding: 16px 17px;
  border-radius: 13px;
  border: 1px solid rgba(179,156,255,.20);
  background: rgba(82, 66, 137, .065);
}

.arch-control span {
  color: var(--violet);
}

.arch-control strong {
  font-size: 13.5px;
  color: #dde6ff;
}

/* Stats */
.stats {
  border-color: rgba(127, 190, 226, .20);
  background: linear-gradient(120deg, rgba(12, 31, 50, .78), rgba(9, 24, 39, .62));
  box-shadow: 0 18px 50px rgba(0,0,0,.10);
}

.stats article {
  padding: 25px;
}

.stats strong {
  font-size: 30px;
  color: var(--cyan);
}

.stats span {
  font-size: 14px;
  color: #adc1d0;
}

/* Sections / typography */
.section {
  padding-top: 112px;
}

.section-heading {
  max-width: 850px;
  margin-bottom: 42px;
}

.section-heading::after {
  content: "";
  display: block;
  width: 84px;
  height: 3px;
  margin-top: 24px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--cyan), var(--green));
  opacity: .9;
}

.section-heading h2 {
  font-size: clamp(39px, 4.4vw, 58px);
  line-height: 1.04;
  letter-spacing: -.046em;
}

.section-heading > p:last-child {
  max-width: 800px;
  margin-top: 18px;
  font-size: 17px;
  line-height: 1.7;
  color: #afc2d0;
}

/* Command center */
.command-layout {
  grid-template-columns: 250px 1fr;
  gap: 20px;
}

.track-tabs {
  padding: 11px;
  background: rgba(10, 27, 45, .78);
}

.track-tab {
  padding: 15px 14px;
  font-size: 13.5px;
}

.command-panel {
  padding: 30px;
  border-color: rgba(117, 205, 246, .23);
  background:
    radial-gradient(circle at 95% 0%, rgba(82,221,255,.07), transparent 23rem),
    linear-gradient(155deg, rgba(13, 34, 55, .96), rgba(7, 21, 36, .93));
  box-shadow: 0 26px 68px rgba(0,0,0,.16);
}

.command-kicker {
  font-size: 11px;
}

.command-grid {
  margin-top: 38px;
  gap: 30px;
}

.command-grid h3 {
  font-size: 35px;
}

.command-grid p {
  font-size: 16px;
  line-height: 1.68;
}

.next-action {
  padding: 21px;
  border-color: rgba(255,191,88,.22);
  background: linear-gradient(145deg, rgba(255,191,88,.065), rgba(99,239,189,.05));
}

.next-action span {
  color: var(--amber);
}

.next-action strong {
  font-size: 14.5px;
}

.progress-row {
  font-size: 13px;
}

/* Engineering cards */
.cards {
  gap: 18px;
}

.card {
  position: relative;
  overflow: hidden;
  min-height: 390px;
  padding: 28px;
  border-color: rgba(139, 190, 222, .19);
  background: linear-gradient(160deg, rgba(13, 32, 52, .88), rgba(7, 20, 34, .78));
  box-shadow: 0 20px 58px rgba(0,0,0,.10);
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), transparent 72%);
  opacity: .75;
}

.card:nth-child(1)::before { background: linear-gradient(90deg, var(--amber), var(--cyan), transparent); }
.card:nth-child(2)::before { background: linear-gradient(90deg, var(--blue), transparent); }
.card:nth-child(3)::before { background: linear-gradient(90deg, var(--green), var(--cyan), transparent); }
.card:nth-child(4)::before { background: linear-gradient(90deg, var(--orange), transparent); }
.card:nth-child(5)::before { background: linear-gradient(90deg, var(--violet), transparent); }
.card:nth-child(6)::before { background: linear-gradient(90deg, var(--amber), var(--green), transparent); }

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(112, 211, 255, .32);
  box-shadow: 0 30px 76px rgba(0,0,0,.18);
}

.card-number {
  font-size: 11px;
}

.card h3 {
  margin-top: 18px;
  font-size: 25px;
  line-height: 1.18;
}

.card p {
  font-size: 15.5px;
  line-height: 1.68;
}

.card ul {
  font-size: 14px;
  line-height: 1.55;
  color: #bfd0dc;
}

.card li {
  margin-bottom: 8px;
}

.card a,
.text-button {
  font-size: 13.5px;
}

/* Linux Engineering: exactly one terminal, larger and more legible */
.linux-lab-section {
  position: relative;
}

.linux-lab-section::before {
  content: "";
  position: absolute;
  inset: 72px 0 auto 0;
  height: 520px;
  pointer-events: none;
  background: radial-gradient(circle at 28% 40%, rgba(99,239,189,.075), transparent 32rem);
  z-index: -1;
}

.linux-terminal-shell {
  max-width: 1160px;
  margin-inline: auto;
}

.linux-console-card {
  width: 100%;
  border-color: rgba(99,239,189,.25);
  border-radius: 22px;
  background: linear-gradient(160deg, rgba(10, 30, 47, .95), rgba(5, 17, 29, .96));
  box-shadow: 0 32px 88px rgba(0,0,0,.28);
}

.linux-console-header {
  min-height: 52px;
  padding: 0 21px;
  font-size: 11px;
}

.shell-mode-banner {
  min-height: 43px;
  padding: 11px 21px;
  font-size: 12px;
  background: linear-gradient(90deg, rgba(99,239,189,.07), rgba(82,221,255,.035));
}

.shell-mode-banner strong {
  font-size: 10px;
}

.interactive-shell .linux-console,
.linux-lab-section .linux-console {
  min-height: 390px;
  max-height: 520px;
  padding: 29px 31px;
  font-size: 16px;
  line-height: 1.82;
  background:
    linear-gradient(rgba(4,16,28,.965), rgba(4,16,28,.965)),
    repeating-linear-gradient(0deg, transparent 0 27px, rgba(255,255,255,.012) 27px 28px);
}

.terminal-output {
  margin-top: 6px;
  color: #e1edf5;
}

.prompt {
  color: #6af3bf;
}

.terminal-entry {
  min-height: 68px;
  padding: 14px 22px;
  gap: 12px;
  background: #061421;
}

.terminal-entry-prompt,
.linux-lab-section .terminal-entry-prompt {
  font-size: 14px;
}

.terminal-entry input,
.linux-lab-section .terminal-entry input {
  font-size: 16px;
  color: #f0f7fb;
}

.terminal-entry input::placeholder {
  color: #71899b;
}

.terminal-entry button {
  min-height: 40px;
  padding: 0 17px;
  border-radius: 10px;
  color: #06131f;
  border-color: transparent;
  background: linear-gradient(135deg, var(--cyan), var(--green));
}

.terminal-shortcuts {
  padding: 11px 22px;
  font-size: 11.5px;
  color: #8fa5b7;
}

.terminal-shortcuts kbd {
  font-size: 10px;
  padding: 3px 6px;
}

.terminal-shortcuts button {
  margin-left: auto;
  font-size: 11.5px;
}

.linux-explainer {
  padding: 28px 30px 30px;
  background: rgba(8, 24, 39, .72);
}

.coach-meta {
  align-items: center;
}

.mini-label,
.coach-topic {
  font-size: 10px !important;
}

.linux-lab-section .linux-explainer h3 {
  margin-top: 11px;
  font-size: 30px;
}

.linux-lab-section .linux-explainer > p {
  max-width: 900px;
  font-size: 16px;
  line-height: 1.7;
}

.coach-grid {
  gap: 14px;
  margin-top: 22px;
}

.coach-box {
  min-height: 150px;
  padding: 18px;
  border-radius: 14px;
}

.coach-box.trick {
  border-color: rgba(82,221,255,.20);
  background: rgba(82,221,255,.035);
}

.coach-box.usecase {
  border-color: rgba(255,191,88,.20);
  background: rgba(255,191,88,.035);
}

.coach-box.dba {
  border-color: rgba(99,239,189,.20);
  background: rgba(99,239,189,.035);
}

.coach-box > span {
  font-size: 9.5px;
}

.linux-lab-section .coach-box p {
  font-size: 14.5px;
  line-height: 1.68;
}

/* Cloud */
.cloud-section {
  margin-top: 112px;
  padding: 108px 0;
  background:
    radial-gradient(circle at 18% 18%, rgba(255,191,88,.075), transparent 25rem),
    radial-gradient(circle at 77% 12%, rgba(82,221,255,.12), transparent 30rem),
    linear-gradient(180deg, rgba(12, 35, 55, .72), rgba(5, 15, 27, .90));
}

.cloud-grid {
  gap: 17px;
}

.cloud-grid article {
  min-height: 280px;
  padding: 26px;
  border-color: rgba(129, 193, 227, .20);
  background: rgba(6, 20, 34, .74);
}

.cloud-grid article:nth-child(1) { border-color: rgba(255,191,88,.25); }
.cloud-grid article:nth-child(2) { border-color: rgba(82,221,255,.24); }
.cloud-grid article:nth-child(3) { border-color: rgba(179,156,255,.24); }
.cloud-grid article:nth-child(4) { border-color: rgba(99,239,189,.24); }

.cloud-icon {
  width: 48px;
  height: 48px;
  font-size: 11px;
}

.cloud-grid article:nth-child(1) .cloud-icon {
  color: var(--amber);
  border-color: rgba(255,191,88,.26);
  background: rgba(255,191,88,.07);
}

.cloud-grid article:nth-child(3) .cloud-icon {
  color: var(--violet);
  border-color: rgba(179,156,255,.24);
  background: rgba(179,156,255,.06);
}

.cloud-grid article:nth-child(4) .cloud-icon {
  color: var(--green);
  border-color: rgba(99,239,189,.24);
  background: rgba(99,239,189,.055);
}

.cloud-grid h3 {
  font-size: 22px;
}

.cloud-grid p {
  font-size: 15px;
  line-height: 1.68;
}

.cloud-flow {
  margin-top: 36px;
  padding: 22px;
  border-color: rgba(136, 193, 225, .20);
}

.cloud-flow span {
  font-size: 11px;
}

.cloud-flow strong {
  font-size: 16px;
}

.cloud-flow small {
  font-size: 12px;
}

/* Roadmap + architecture flow */
.roadmap li {
  grid-template-columns: 105px 1fr;
  padding: 28px 0;
}

.roadmap > li > span {
  font-size: 13px;
}

.roadmap h3 {
  font-size: 22px;
}

.roadmap p {
  max-width: 900px;
  font-size: 15px;
  line-height: 1.65;
}

.flow-node {
  padding: 20px;
  background: rgba(10, 28, 46, .78);
}

.flow-node strong {
  font-size: 16px;
}

.flow-node span {
  font-size: 12px;
}

.flow-node small {
  font-size: 10px;
}

/* LinkedIn */
.linkedin-section {
  margin-top: 112px;
  padding: 70px 0;
  background:
    radial-gradient(circle at 90% 10%, rgba(82,221,255,.10), transparent 22rem),
    linear-gradient(120deg, rgba(12, 43, 66, .82), rgba(9, 30, 42, .64));
}

.linkedin-wrap h2 {
  font-size: 42px;
}

.linkedin-wrap p:last-child {
  font-size: 16px;
  color: #b7c8d5;
}

/* Safety */
.safety-grid {
  gap: 16px;
}

.safety-grid article {
  position: relative;
  padding: 24px;
  background: rgba(10, 27, 44, .68);
}

.safety-grid article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 3px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--amber), var(--green));
}

.safety-grid strong {
  font-size: 15px;
}

.safety-grid p {
  font-size: 14px;
  line-height: 1.64;
}

/* Footer */
.footer {
  padding: 36px 0;
}

.footer-links a {
  font-size: 13.5px;
}

/* Responsive */
@media (max-width: 1080px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    gap: 46px;
  }

  .hero-architecture {
    max-width: 780px;
  }

  .command-layout {
    grid-template-columns: 220px 1fr;
  }
}

@media (max-width: 760px) {
  body {
    font-size: 16px;
  }

  .nav {
    min-height: 74px;
  }

  .nav-links {
    top: 73px;
    background: #081827;
  }

  .nav-links a {
    font-size: 15px;
  }

  .hero {
    padding-top: 68px;
  }

  .hero h1 {
    font-size: clamp(45px, 13vw, 68px);
  }

  .hero-text {
    font-size: 16.5px;
  }

  .arch-grid {
    grid-template-columns: 1fr;
  }

  .arch-header,
  .arch-control {
    align-items: flex-start;
    flex-direction: column;
  }

  .section {
    padding-top: 92px;
  }

  .section-heading h2 {
    font-size: clamp(35px, 10vw, 48px);
  }

  .section-heading > p:last-child {
    font-size: 16px;
  }

  .command-layout {
    grid-template-columns: 1fr;
  }

  .track-tab {
    font-size: 14px;
  }

  .card {
    min-height: auto;
  }

  .interactive-shell .linux-console,
  .linux-lab-section .linux-console {
    min-height: 330px;
    padding: 22px;
    font-size: 14px;
  }

  .terminal-entry {
    grid-template-columns: 1fr auto;
  }

  .terminal-entry-prompt {
    grid-column: 1 / -1;
  }

  .coach-grid {
    grid-template-columns: 1fr;
  }

  .coach-box {
    min-height: 0;
  }

  .linkedin-wrap h2 {
    font-size: 35px;
  }
}

@media (max-width: 480px) {
  .shell {
    width: min(100% - 24px, var(--max));
  }

  .hero h1 {
    font-size: clamp(42px, 13vw, 58px);
  }

  .hero-architecture {
    padding: 17px;
  }

  .arch-focus {
    padding: 18px;
  }

  .arch-focus strong {
    font-size: 23px;
  }

  .section-heading h2 {
    font-size: 36px;
  }

  .linux-explainer {
    padding: 23px 20px 24px;
  }
}


/* ============================================================
   FINAL V8 — simplified navigation, contact, legal/footer polish
   ============================================================ */

.nav-links {
  gap: 30px;
}

.nav-links .contact-link {
  padding: 9px 14px;
  margin: -9px 0;
  color: #eaf8ff;
  border: 1px solid rgba(82, 221, 255, .27);
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(82,221,255,.07), rgba(99,239,189,.055));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.025);
}

.nav-links .contact-link::after {
  display: none;
}

.nav-links .contact-link:hover {
  border-color: rgba(99,239,189,.48);
  background: linear-gradient(135deg, rgba(82,221,255,.12), rgba(99,239,189,.09));
}

/* Contact becomes the single professional CTA section. */
.contact-section {
  position: relative;
  overflow: hidden;
  margin-top: 112px;
  padding: 104px 0;
  background:
    radial-gradient(circle at 10% 18%, rgba(82,221,255,.12), transparent 28rem),
    radial-gradient(circle at 88% 72%, rgba(99,239,189,.09), transparent 27rem),
    linear-gradient(145deg, rgba(8, 26, 43, .97), rgba(5, 15, 27, .98));
  border-top: 1px solid rgba(122, 190, 226, .15);
  border-bottom: 1px solid rgba(122, 190, 226, .15);
}

.contact-section::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, transparent 0 49.9%, rgba(255,255,255,.018) 50%, transparent 50.1%);
}

.contact-layout {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, .78fr) minmax(560px, 1.22fr);
  gap: 64px;
  align-items: center;
}

.contact-intro h2 {
  margin: 12px 0 22px;
  max-width: 620px;
  font-size: clamp(42px, 4.5vw, 62px);
  line-height: 1.02;
  letter-spacing: -.048em;
}

.contact-intro > p:not(.eyebrow) {
  max-width: 660px;
  margin: 0;
  color: #b4c7d5;
  font-size: 17px;
  line-height: 1.75;
}

.contact-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 28px;
}

.contact-trust span {
  padding: 7px 10px;
  border: 1px solid rgba(130,190,224,.17);
  border-radius: 999px;
  color: #9fb5c5;
  background: rgba(7, 20, 34, .55);
  font-size: 11px;
  font-weight: 680;
}

.contact-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.contact-card {
  position: relative;
  overflow: hidden;
  min-height: 365px;
  padding: 28px;
  border: 1px solid rgba(131, 193, 226, .20);
  border-radius: 20px;
  background: linear-gradient(155deg, rgba(13, 34, 55, .93), rgba(7, 20, 34, .92));
  box-shadow: 0 26px 74px rgba(0,0,0,.18);
}

.contact-card::before {
  content: "";
  position: absolute;
  left: 0;
  right: 35%;
  top: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), transparent);
}

.contact-card.satya-card {
  border-color: rgba(99, 239, 189, .26);
  background:
    radial-gradient(circle at 100% 0%, rgba(99,239,189,.065), transparent 19rem),
    linear-gradient(155deg, rgba(12, 38, 54, .95), rgba(7, 21, 34, .94));
}

.contact-card.satya-card::before {
  right: 20%;
  background: linear-gradient(90deg, var(--green), var(--cyan), transparent);
}

.contact-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.contact-label,
.contact-code {
  font: 760 9.5px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .11em;
}

.contact-label {
  color: var(--cyan);
}

.satya-card .contact-label {
  color: var(--green);
}

.contact-code {
  color: #6f899c;
}

.contact-card h3 {
  margin: 28px 0 14px;
  font-size: 24px;
  line-height: 1.15;
  letter-spacing: -.025em;
}

.contact-card p {
  min-height: 105px;
  margin: 0;
  color: #aebfcd;
  font-size: 14.5px;
  line-height: 1.7;
}

.contact-email {
  display: inline-block;
  margin-top: 23px;
  color: #edf9ff;
  font-size: clamp(16px, 1.25vw, 19px);
  font-weight: 760;
  text-decoration: none;
  letter-spacing: -.02em;
}

.contact-email:hover {
  color: var(--cyan);
}

.satya-card .contact-email:hover {
  color: var(--green);
}

.contact-action {
  display: inline-flex;
  align-items: center;
  margin-top: 18px;
  color: var(--cyan);
  font-size: 12.5px;
  font-weight: 760;
  text-decoration: none;
}

.satya-card .contact-action {
  color: var(--green);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.contact-action.secondary {
  color: #86dff7;
}

/* Safety is deliberately retained in-page, but no longer occupies primary navigation. */
#safety {
  padding-top: 96px;
}

/* Footer — concise, legal, and useful. */
.footer {
  padding: 40px 0 44px;
  border-top: 1px solid rgba(129,190,225,.16);
  background: rgba(4, 12, 21, .82);
}

.footer-main {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 36px;
}

.footer-brand .brand {
  display: inline-flex;
}

.footer-brand .brand small {
  max-width: 520px;
}

.footer-brand > p {
  margin: 15px 0 0;
  color: #738b9d;
  font-size: 11.5px;
}

.footer-links {
  justify-content: flex-end;
  gap: 20px;
}

.footer-links a {
  color: #9db2c2;
  text-decoration: none;
  font-size: 12.5px;
  font-weight: 680;
}

.footer-links a:first-child {
  color: #69dcf8;
}

.footer-links a:hover {
  color: #eff9ff;
}

@media (max-width: 1080px) {
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .contact-intro {
    max-width: 820px;
  }
}

@media (max-width: 760px) {
  .contact-section {
    margin-top: 92px;
    padding: 82px 0;
  }

  .contact-cards {
    grid-template-columns: 1fr;
  }

  .contact-card {
    min-height: auto;
  }

  .contact-card p {
    min-height: 0;
  }

  .footer-main {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-links {
    justify-content: flex-start;
  }
}


/* ============================================================
   FINAL V8.1 — creator signature + trademark polish
   ============================================================ */

/* Hero attribution: no redundant DATABASE ENGINEERING eyebrow. */
.owner-signature {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 11px;
  margin: 0 0 30px;
  padding: 5px 0 10px;
}

.owner-signature::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 92px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--cyan), var(--green), transparent);
  box-shadow: 0 0 20px rgba(82, 221, 255, .18);
}

.owner-prefix {
  color: #8ea8ba;
  font: 720 11px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.owner-name {
  position: relative;
  color: transparent;
  background: linear-gradient(90deg, #f1fbff 8%, #7ee4ff 58%, #7aefc0 100%);
  -webkit-background-clip: text;
  background-clip: text;
  font-size: clamp(22px, 2vw, 29px);
  line-height: 1;
  font-weight: 820;
  letter-spacing: -.035em;
  text-decoration: none;
  text-shadow: 0 0 28px rgba(82, 221, 255, .08);
}

.owner-name:hover {
  filter: brightness(1.12);
}

/* Make the common-law trademark symbol intentional and visible. */
.tm-mark {
  position: relative;
  top: -.42em;
  margin-left: 2px;
  color: var(--cyan);
  font-size: .52em;
  font-weight: 800;
  line-height: 0;
}

/* Footer legal/trademark notice. */
.legal-line {
  line-height: 1.65;
}

.legal-line span {
  color: #627b8d;
  font-size: 10.5px;
  letter-spacing: .01em;
}

@media (max-width: 640px) {
  .owner-signature {
    align-items: flex-start;
    flex-direction: column;
    gap: 7px;
  }

  .owner-name {
    font-size: 25px;
  }
}