:root {
  --fs-xs: clamp(0.75rem, 0.72rem + 0.2vw, 0.875rem);
  --fs-sm: clamp(0.875rem, 0.82rem + 0.3vw, 1rem);
  --fs-base: clamp(1rem, 0.95rem + 0.3vw, 1.125rem);
  --fs-lg: clamp(1.125rem, 1rem + 0.6vw, 1.35rem);
  --fs-xl: clamp(1.35rem, 1.2rem + 0.9vw, 1.75rem);
  --fs-2xl: clamp(1.8rem, 1.5rem + 1vw, 2.5rem);
  --fs-3xl: clamp(2.5rem, 2rem + 2vw, 4rem);
  --fs-4xl: clamp(3.5rem, 3rem + 3vw, 6rem);
  --fs-hero: clamp(4rem, 7vw, 8rem);
  --lh-tight: 0.95;
  --lh-heading: 1.3;
  --lh-body: 1.7;
  --lh-loose: 2;
  --ls-tight: -0.06em;
  --ls-heading: -0.04em;
  --ls-normal: 0;
  --ls-wide: 0.04em;
  --bg: #000000;
  --bg-secondary: #080808;
  --bg-tertiary: #111111;
  --bg-elevated: #181818;
  --bg-card: rgba(255, 255, 255, 0.04);
  --surface: rgba(255, 255, 255, 0.06);
  --surface-hover: rgba(255, 255, 255, 0.09);
  --text: #ffffff;
  --text-secondary: #d6d6d6;
  --text-muted: #9a9a9a;
  --text-disabled: #666666;
  --border: rgba(255, 255, 255, 0.08);
  --border-light: rgba(255, 255, 255, 0.12);
  --accent: #0a84ff;
  --accent-light: #5ac8fa;
  --accent-dark: #0066cc;
  --success: #32d74b;
  --warning: #ffd60a;
  --danger: #ff453a;
  --gradient-primary: linear-gradient(135deg, #ffffff, #9ca3af);
  --gradient-accent: linear-gradient(135deg, #5ac8fa, #0a84ff);
  --gradient-dark: linear-gradient(180deg, #0d0d0d, #000);
  --gradient-card: linear-gradient(
    145deg,
    rgba(255, 255, 255, 0.08),
    rgba(255, 255, 255, 0.02)
  );
  --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;
  --space-11: 10rem;
  --space-12: 12rem;
  --container: 1440px;
  --content: 820px;
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-2xl: 40px;
  --radius-full: 999px;
  --shadow-xs: 0 2px 8px rgba(0, 0, 0, 0.15);
  --shadow-sm: 0 8px 24px rgba(0, 0, 0, 0.18);
  --shadow-md: 0 16px 40px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 30px 80px rgba(0, 0, 0, 0.35);
  --shadow-xl: 0 50px 120px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 80px rgba(10, 132, 255, 0.18);
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-blur: blur(24px);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-smooth: cubic-bezier(0.22, 1, 0.36, 1);
  --transition-fast: 0.25s var(--ease);
  --transition: 0.45s var(--ease);
  --transition-slow: 0.8s var(--ease);
  --z-dropdown: 100;
  --z-sticky: 500;
  --z-fixed: 1000;
  --z-modal: 5000;
  --z-loader: 9999;
  --blur-sm: 10px;
  --blur-md: 24px;
  --blur-lg: 50px;
  --blur-xl: 80px;
  --btn-height: 56px;
  --btn-padding: 0 2rem;
  --nav-height: 80px;
  --section-padding: clamp(6rem, 10vw, 12rem);
  --image-radius: 32px;
  --backdrop: saturate(180%) blur(20px);
}

* {
  margin: 0;
  padding: 0;
  color: var(--text);
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
}

/* Firefox */
html {
  scrollbar-width: thin;
  scrollbar-color: rgba(120, 120, 128, 0.45) transparent;
}

/* Chrome, Edge, Safari */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(120, 120, 128, 0.45);
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(120, 120, 128, 0.7);
}

body {
  background: var(--bg);
  display: flex;
  align-items: center;
  flex-direction: column;
}

/* universal navigation bar */
.navbar {
  padding: var(--space-4);
  max-width: 800px;
  width: 100%;
}

.navbar .banner {
  display: flex;
  align-items: center;
  flex-direction: column;
  padding: var(--space-1) 0;
  border-bottom: var(--text-muted) solid 1px;
}

.navbar .banner a {
  color: var(--accent);
  text-transform: uppercase;
  text-decoration: none;
  font-size: var(--fs-xs);
}

.navbar .banner a i {
  color: inherit;
  transform: translateY(-10%);
}

.navbar .banner p {
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

.navbar .navi {
  display: flex;
  justify-content: space-between;
  padding: var(--space-6) 0;
}

.navbar .navi .credit a {
  text-decoration: none;
  font-size: var(--fs-xl);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  font-weight: 500;
}

.navbar .navi .credit a span {
  animation: blink 1s infinite;
}

@keyframes blink {
  0%,
  100% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
}

.navbar .navi .credit p {
  color: var(--text-muted);
}

.navbar .navi .links ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.navbar .navi .links ul li {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.navbar .navi .links ul li a {
  text-decoration: none;
  text-transform: uppercase;
  font-size: var(--fs-sm);
  transition: color 0.3s ease;
}

.navbar .navi .links ul li a i {
  color: inherit;
}

.navbar .navi .links > ul > li.active > a {
  color: var(--accent);
}

.navbar .navi .links .dropdown {
  height: 0;
  overflow: hidden;
  padding-right: 20px;
  transition:
    height 0.35s ease,
    padding 0.35s ease;
}

.navbar .navi .links .dropdown ul li {
  line-height: 1.5;
}

.navbar .navi .links .dropdown ul li a {
  text-transform: none;
  font-size: var(--fs-xs);
  color: var(--text-muted);
  transition: color 0.3s ease;
}

.navbar .navi .links .dropdown ul li a:hover {
  color: var(--accent);
}

/* main content  */
main {
  padding: 0 var(--space-4);
  max-width: 800px;
}

.landing h3 {
  font-size: var(--fs-sm);
  text-transform: uppercase;
  font-family: "Geist Mono", monospace;
  font-optical-sizing: auto;
  font-weight: 400;
}

.landing h2 {
  text-transform: uppercase;
  padding: var(--space-3) 0;
  font-weight: 500;
  letter-spacing: var(--ls-wide);
  font-size: var(--fs-xl);
}

.landing p {
  font-size: var(--fs-lg);
  color: var(--text-muted);
}

.landing .pcb-img {
  width: 100%;
  aspect-ratio: 640/427;
  background: url(../upload/gen/idea.jpg) center/cover;
  position: relative;
}

.pcb-img .overlay {
  position: absolute;
  height: 30%;
  background: linear-gradient(to top, var(--bg), transparent);
  width: 100%;
  bottom: -3px;
  left: 0;
}

.showcase {
  padding: var(--space-6) 0;
}

.showcase h3 {
  text-transform: uppercase;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-muted);
  font-family: "Geist Mono", monospace;
}

.showcase h2 {
  text-transform: uppercase;
  padding: var(--space-2) 0;
  font-weight: 500;
  font-size: var(--fs-xl);
}

.showcase p {
  font-size: var(--fs-lg);
  color: var(--text-muted);
}

.wrapper {
  padding: var(--space-4) 0;
}

.wrapper .card {
  display: flex;
  display: grid;
  grid-template-columns: 1fr 4fr;
}

.wrapper .card .details {
  padding: 0 0 var(--space-3) var(--space-4);
  border-left: 1px var(--text-muted) solid;
  position: relative;
}

.wrapper .card .details::before {
  content: "";
  position: absolute;
  height: 10px;
  aspect-ratio: 1/1;
  background: var(--bg);
  border: 1px solid var(--text-muted);
  top: 6px;
  left: 0;
  border-radius: 50%;
  transform: translateX(-50%);
}

.wrapper .card .date p {
  font-size: var(--fs-sm);
  font-family: "Geist Mono", monospace;
  padding: 2px 0;
}

.wrapper .card .details {
  display: flex;
  flex-direction: column;
}

.wrapper .card .details a {
  text-decoration: none;
  color: var(--accent);
  font-size: var(--fs-sm);
}

.wrapper .card .details a span {
  text-transform: uppercase;
  color: var(--text-muted);
  font-size: var(--fs-xs);
  padding-left: 7px;
  font-family: "Geist Mono", monospace;
}

.wrapper .card .details p {
  font-size: var(--fs-xs);
  color: var(--text);
}

.btn {
  padding: var(--space-1) 0;
}

.btn a {
  text-decoration: none;
  font-size: var(--fs-sm);
  color: var(--accent);
}

.btn a i {
  color: inherit;
}

.cohort {
  padding: var(--space-6) 0;
}

.cohort h2 {
  text-transform: uppercase;
  font-weight: 400;
  font-size: var(--fs-2xl);
}

.cohort p {
  font-size: var(--fs-lg);
  color: var(--text-muted);
}

.cohort .table .card {
  display: grid;
  grid-template-columns: 1fr 4fr;
  gap: var(--space-4);
  padding: var(--space-3) 0;
}

.cohort .table .month p {
  font-size: var(--fs-xs);
}

.cohort .details h3 {
  font-size: var(--fs-sm);
  font-weight: 400;
}

.cohort .details p {
  font-size: var(--fs-xs);
}

.chevron i {
  font-size: var(--fs-xs);
  transform: translateY(7%);
}

footer {
  padding: var(--space-4);
  max-width: 800px;
}

footer p {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  padding: var(--space-1) 0;
}

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

footer p a i {
  color: inherit;
}

footer .wrapper {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

footer .wrapper ul {
  list-style: none;
}

footer .wrapper ul span {
  color: var(--text);
  font-size: var(--fs-xs);
  text-transform: uppercase;
}

footer ul li {
  line-height: 1;
}

footer .wrapper ul li a {
  text-decoration: none;
  font-size: var(--fs-xs);
  color: var(--text-muted);
  transition: color 0.3s ease;
}

footer .wrapper ul li a:hover {
  color: var(--text);
}

/* Error */

.error h2 {
  text-align: center;
  font-size: var(--fs-3xl);
  font-weight: 400;
}

body.error {
  height: 100svh;
  justify-content: space-between;
}