/*
  Skunkworks Academy Design System
  Carbon-inspired static web foundation for pages, forms, portals, landing pages, and faculty profiles.
  Use this file as the visual contract for all Skunkworks Academy public pages.
*/

:root {
  color-scheme: light;

  /* Brand primitives */
  --sk-brand-black: #0f0f14;
  --sk-brand-ink: #161616;
  --sk-brand-blue: #0f62fe;
  --sk-brand-blue-hover: #0043ce;
  --sk-brand-cyan: #33b1ff;
  --sk-brand-purple: #8a3ffc;
  --sk-brand-green: #24a148;
  --sk-brand-red: #da1e28;

  /* Neutral palette */
  --sk-bg: #f4f4f4;
  --sk-bg-subtle: #ffffff;
  --sk-layer-01: #ffffff;
  --sk-layer-02: #f4f4f4;
  --sk-layer-03: #e0e0e0;
  --sk-text-primary: #161616;
  --sk-text-secondary: #525252;
  --sk-text-on-color: #ffffff;
  --sk-border-subtle: #e0e0e0;
  --sk-border-strong: #8d8d8d;
  --sk-focus: #0f62fe;
  --sk-shadow: 0 18px 48px rgba(15, 15, 20, 0.10);

  /* Functional tokens */
  --sk-interactive: var(--sk-brand-blue);
  --sk-interactive-hover: var(--sk-brand-blue-hover);
  --sk-link: var(--sk-brand-blue);
  --sk-success: var(--sk-brand-green);
  --sk-danger: var(--sk-brand-red);

  /* Type scale */
  --sk-font-sans: "Inter", "IBM Plex Sans", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --sk-font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --sk-type-hero: clamp(2.5rem, 7vw, 5.5rem);
  --sk-type-h1: clamp(2rem, 4vw, 3.5rem);
  --sk-type-h2: clamp(1.65rem, 3vw, 2.5rem);
  --sk-type-h3: clamp(1.25rem, 2vw, 1.75rem);
  --sk-type-body: 1rem;
  --sk-type-small: 0.875rem;

  /* 2x grid spacing inspired scale */
  --sk-space-01: 0.125rem;
  --sk-space-02: 0.25rem;
  --sk-space-03: 0.5rem;
  --sk-space-04: 0.75rem;
  --sk-space-05: 1rem;
  --sk-space-06: 1.5rem;
  --sk-space-07: 2rem;
  --sk-space-08: 2.5rem;
  --sk-space-09: 3rem;
  --sk-space-10: 4rem;
  --sk-space-11: 5rem;
  --sk-space-12: 6rem;

  --sk-container: 1200px;
  --sk-radius: 0;
  --sk-radius-soft: 0.75rem;
  --sk-transition: 160ms ease;
}

[data-theme="dark"] {
  color-scheme: dark;
  --sk-bg: #161616;
  --sk-bg-subtle: #262626;
  --sk-layer-01: #262626;
  --sk-layer-02: #393939;
  --sk-layer-03: #525252;
  --sk-text-primary: #f4f4f4;
  --sk-text-secondary: #c6c6c6;
  --sk-border-subtle: #393939;
  --sk-border-strong: #6f6f6f;
  --sk-shadow: 0 18px 48px rgba(0, 0, 0, 0.32);
}

[data-brand="academy"] {
  --sk-interactive: #0f62fe;
  --sk-interactive-hover: #0043ce;
}

[data-brand="skunkworks"] {
  --sk-interactive: #8a3ffc;
  --sk-interactive-hover: #6929c4;
}

[data-brand="portal"] {
  --sk-interactive: #0072c3;
  --sk-interactive-hover: #00539a;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--sk-font-sans);
  color: var(--sk-text-primary);
  background: var(--sk-bg);
  line-height: 1.5;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img,
picture,
svg,
video {
  display: block;
  max-width: 100%;
}

button,
input,
select,
textarea {
  font: inherit;
}

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

a:hover {
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--sk-focus);
  outline-offset: 2px;
}

::selection {
  background: var(--sk-interactive);
  color: var(--sk-text-on-color);
}

.sk-app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.sk-container {
  width: min(100% - 2rem, var(--sk-container));
  margin-inline: auto;
}

.sk-section {
  padding-block: var(--sk-space-11);
}

.sk-section--compact {
  padding-block: var(--sk-space-08);
}

.sk-section--contrast {
  background: var(--sk-layer-01);
  border-block: 1px solid var(--sk-border-subtle);
}

.sk-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sk-space-03);
  margin: 0 0 var(--sk-space-05);
  color: var(--sk-interactive);
  font-size: var(--sk-type-small);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sk-topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(15, 15, 20, 0.96);
  color: var(--sk-text-on-color);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
}

.sk-topbar__inner {
  min-height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sk-space-06);
}

.sk-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--sk-space-04);
  color: var(--sk-text-on-color);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.sk-brand:hover {
  text-decoration: none;
}

.sk-brand__mark {
  inline-size: 2rem;
  block-size: 2rem;
  display: grid;
  place-items: center;
  background: var(--sk-interactive);
  color: var(--sk-text-on-color);
  font-weight: 900;
}

.sk-brand__text {
  display: grid;
  line-height: 1.1;
}

.sk-brand__subtext {
  color: #c6c6c6;
  font-size: 0.75rem;
  font-weight: 500;
}

.sk-nav {
  display: flex;
  align-items: center;
  gap: var(--sk-space-02);
}

.sk-nav a,
.sk-nav button {
  min-height: 2.5rem;
  display: inline-flex;
  align-items: center;
  padding-inline: var(--sk-space-05);
  border: 0;
  background: transparent;
  color: #f4f4f4;
  cursor: pointer;
  font-weight: 600;
}

.sk-nav a:hover,
.sk-nav button:hover,
.sk-nav a[aria-current="page"] {
  background: rgba(255, 255, 255, 0.12);
  text-decoration: none;
}

.sk-nav-toggle {
  display: none;
  min-height: 2.75rem;
  min-width: 2.75rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: transparent;
  color: var(--sk-text-on-color);
  cursor: pointer;
}

.sk-main {
  flex: 1;
}

.sk-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at top right, color-mix(in srgb, var(--sk-interactive) 32%, transparent), transparent 34rem),
    linear-gradient(135deg, #161616 0%, #262626 55%, #0f0f14 100%);
  color: var(--sk-text-on-color);
  border-bottom: 1px solid var(--sk-border-subtle);
}

.sk-hero__inner {
  min-height: clamp(28rem, 56vw, 44rem);
  display: grid;
  align-items: end;
  padding-block: var(--sk-space-12) var(--sk-space-11);
}

.sk-hero__content {
  max-width: 880px;
}

.sk-hero h1,
.sk-page-header h1 {
  margin: 0 0 var(--sk-space-06);
  font-size: var(--sk-type-hero);
  line-height: 0.95;
  letter-spacing: -0.06em;
}

.sk-hero p,
.sk-page-header p,
.sk-section-lead {
  max-width: 760px;
  margin: 0;
  color: color-mix(in srgb, currentColor 72%, transparent);
  font-size: clamp(1.05rem, 1.7vw, 1.35rem);
}

.sk-page-header {
  padding-block: var(--sk-space-11) var(--sk-space-08);
  background: var(--sk-layer-01);
  border-bottom: 1px solid var(--sk-border-subtle);
}

.sk-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sk-space-04);
  margin-top: var(--sk-space-07);
}

.sk-button {
  min-height: 3rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sk-space-03);
  padding-inline: var(--sk-space-06);
  border: 1px solid transparent;
  background: var(--sk-interactive);
  color: var(--sk-text-on-color);
  cursor: pointer;
  font-weight: 700;
  text-decoration: none;
  transition: background var(--sk-transition), border-color var(--sk-transition), color var(--sk-transition), transform var(--sk-transition);
}

.sk-button:hover {
  background: var(--sk-interactive-hover);
  color: var(--sk-text-on-color);
  text-decoration: none;
}

.sk-button--secondary {
  background: transparent;
  color: currentColor;
  border-color: currentColor;
}

.sk-button--secondary:hover {
  background: currentColor;
  color: var(--sk-bg-subtle);
}

.sk-button--ghost {
  background: transparent;
  color: var(--sk-link);
  border-color: transparent;
}

.sk-button--ghost:hover {
  background: color-mix(in srgb, var(--sk-interactive) 10%, transparent);
  color: var(--sk-interactive-hover);
}

.sk-grid {
  display: grid;
  gap: var(--sk-space-06);
}

.sk-grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.sk-grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.sk-grid--4,
.sk-card-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.sk-card {
  min-height: 100%;
  background: var(--sk-layer-01);
  border: 1px solid var(--sk-border-subtle);
  color: var(--sk-text-primary);
  transition: transform var(--sk-transition), box-shadow var(--sk-transition), border-color var(--sk-transition);
}

.sk-card:hover {
  border-color: color-mix(in srgb, var(--sk-interactive) 42%, var(--sk-border-subtle));
  box-shadow: var(--sk-shadow);
}

.sk-card__media {
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: var(--sk-layer-02);
}

.sk-card__media img {
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
  transition: transform 280ms ease;
}

.sk-card:hover .sk-card__media img {
  transform: scale(1.035);
}

.sk-card__body {
  padding: var(--sk-space-06);
}

.sk-card__title {
  margin: 0 0 var(--sk-space-02);
  font-size: 1.125rem;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.sk-card__meta,
.sk-card__text {
  margin: 0;
  color: var(--sk-text-secondary);
  font-size: var(--sk-type-small);
}

.sk-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sk-space-03);
  margin-top: var(--sk-space-05);
}

.sk-tag {
  display: inline-flex;
  align-items: center;
  min-height: 1.5rem;
  padding-inline: var(--sk-space-04);
  background: color-mix(in srgb, var(--sk-interactive) 12%, transparent);
  color: var(--sk-interactive);
  font-size: 0.75rem;
  font-weight: 700;
}

.sk-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--sk-border-subtle);
  border: 1px solid var(--sk-border-subtle);
}

.sk-stat {
  padding: var(--sk-space-06);
  background: var(--sk-layer-01);
}

.sk-stat__value {
  display: block;
  margin-bottom: var(--sk-space-02);
  color: var(--sk-interactive);
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.sk-stat__label {
  color: var(--sk-text-secondary);
  font-size: var(--sk-type-small);
}

.sk-form {
  display: grid;
  gap: var(--sk-space-05);
  padding: var(--sk-space-07);
  background: var(--sk-layer-01);
  border: 1px solid var(--sk-border-subtle);
}

.sk-field {
  display: grid;
  gap: var(--sk-space-03);
}

.sk-label {
  color: var(--sk-text-primary);
  font-size: var(--sk-type-small);
  font-weight: 700;
}

.sk-input,
.sk-select,
.sk-textarea {
  width: 100%;
  min-height: 3rem;
  padding-inline: var(--sk-space-05);
  border: 1px solid var(--sk-border-strong);
  background: var(--sk-bg-subtle);
  color: var(--sk-text-primary);
}

.sk-textarea {
  min-height: 9rem;
  padding-block: var(--sk-space-04);
  resize: vertical;
}

.sk-help-text {
  margin: 0;
  color: var(--sk-text-secondary);
  font-size: 0.8125rem;
}

.sk-form-card {
  width: min(100%, 460px);
  margin-inline: auto;
}

.sk-login-layout {
  min-height: calc(100vh - 4rem);
  display: grid;
  place-items: center;
  padding: var(--sk-space-07);
  background:
    radial-gradient(circle at top left, color-mix(in srgb, var(--sk-interactive) 24%, transparent), transparent 28rem),
    var(--sk-bg);
}

.sk-portal-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: calc(100vh - 4rem);
}

.sk-sidebar {
  padding: var(--sk-space-06);
  background: var(--sk-layer-01);
  border-right: 1px solid var(--sk-border-subtle);
}

.sk-sidebar nav {
  display: grid;
  gap: var(--sk-space-02);
}

.sk-sidebar a {
  min-height: 2.75rem;
  display: flex;
  align-items: center;
  padding-inline: var(--sk-space-04);
  color: var(--sk-text-secondary);
  font-weight: 700;
}

.sk-sidebar a:hover,
.sk-sidebar a[aria-current="page"] {
  background: color-mix(in srgb, var(--sk-interactive) 12%, transparent);
  color: var(--sk-interactive);
  text-decoration: none;
}

.sk-panel {
  padding: var(--sk-space-07);
  background: var(--sk-layer-01);
  border: 1px solid var(--sk-border-subtle);
}

.sk-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--sk-border-subtle);
}

.sk-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--sk-layer-01);
}

.sk-table th,
.sk-table td {
  padding: var(--sk-space-04) var(--sk-space-05);
  border-bottom: 1px solid var(--sk-border-subtle);
  text-align: left;
}

.sk-table th {
  background: var(--sk-layer-02);
  color: var(--sk-text-primary);
  font-size: var(--sk-type-small);
}

.sk-banner {
  padding: var(--sk-space-05) var(--sk-space-06);
  background: color-mix(in srgb, var(--sk-interactive) 12%, var(--sk-layer-01));
  border-left: 4px solid var(--sk-interactive);
}

.sk-cta {
  background: #161616;
  color: var(--sk-text-on-color);
  border-top: 1px solid rgba(255,255,255,0.12);
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.sk-cta__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--sk-space-07);
  padding-block: var(--sk-space-09);
}

.sk-cta h2 {
  margin: 0 0 var(--sk-space-03);
  font-size: var(--sk-type-h2);
  line-height: 1;
  letter-spacing: -0.04em;
}

.sk-cta p {
  margin: 0;
  color: #c6c6c6;
}

.sk-footer {
  margin-top: auto;
  background: #0f0f14;
  color: #c6c6c6;
  border-top: 1px solid rgba(255,255,255,0.12);
}

.sk-footer__inner {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: var(--sk-space-08);
  padding-block: var(--sk-space-09);
}

.sk-footer h2,
.sk-footer h3 {
  margin: 0 0 var(--sk-space-04);
  color: #ffffff;
  font-size: 1rem;
}

.sk-footer p {
  max-width: 38rem;
  margin: 0;
}

.sk-footer a {
  display: block;
  margin-bottom: var(--sk-space-03);
  color: #c6c6c6;
}

.sk-footer__bottom {
  padding-block: var(--sk-space-05);
  border-top: 1px solid rgba(255,255,255,0.12);
  color: #8d8d8d;
  font-size: var(--sk-type-small);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media (max-width: 980px) {
  .sk-grid--3,
  .sk-grid--4,
  .sk-card-grid,
  .sk-stats,
  .sk-footer__inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .sk-cta__inner,
  .sk-portal-layout {
    grid-template-columns: 1fr;
  }

  .sk-sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--sk-border-subtle);
  }
}

@media (max-width: 760px) {
  .sk-nav-toggle {
    display: inline-grid;
    place-items: center;
  }

  .sk-nav {
    position: fixed;
    inset: 4rem 0 auto 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: var(--sk-space-04);
    background: #0f0f14;
    border-bottom: 1px solid rgba(255,255,255,0.12);
  }

  .sk-nav[data-open="true"] {
    display: flex;
  }

  .sk-nav a,
  .sk-nav button {
    width: 100%;
    justify-content: flex-start;
  }

  .sk-grid--2,
  .sk-grid--3,
  .sk-grid--4,
  .sk-card-grid,
  .sk-stats,
  .sk-footer__inner {
    grid-template-columns: 1fr;
  }

  .sk-section {
    padding-block: var(--sk-space-09);
  }

  .sk-hero__inner {
    min-height: 32rem;
  }
}