:root {
  --bg: #000000;
  --surface: #353535;
  --surface-elevated: #444444;
  --border: #4e4e4e;
  --text: #d9d9d9;
  --muted: #8c8c8c;
  --accent: #3c6e71;
  --accent-strong: #284b63;
  --accent-soft: #9ad1d4;
  --white: #ffffff;
  --radius-card: 16px;
  --radius-control: 20px;
  --radius-pill: 30px;
  --wrap: 1120px;
}

:root[data-theme="light"] {
  --bg: #f6f8fa;
  --surface: #ffffff;
  --surface-elevated: #eef2f6;
  --border: #d6dde6;
  --text: #1e2732;
  --muted: #667281;
  --accent: #3c6e71;
  --accent-strong: #284b63;
  --accent-soft: #9ad1d4;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Trebuchet MS", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(60, 110, 113, 0.2), transparent 24rem),
    radial-gradient(circle at top left, rgba(40, 75, 99, 0.22), transparent 26rem),
    var(--bg);
  overflow-x: hidden;
}

:root[data-theme="light"] body {
  background:
    radial-gradient(circle at top right, rgba(60, 110, 113, 0.1), transparent 24rem),
    radial-gradient(circle at top left, rgba(40, 75, 99, 0.12), transparent 26rem),
    var(--bg);
}

a {
  color: inherit;
}

a,
button,
.button,
.site-nav a,
.theme-toggle,
.menu-toggle,
.hero,
.panel,
.photo-panel,
.tutorial-step,
.member-card,
.coming-soon,
.download-card,
.detail-card,
.mini-stat,
.diagram-box,
.photo-frame img {
  transition:
    transform 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease,
    color 180ms ease,
    filter 180ms ease,
    opacity 180ms ease;
}

img {
  max-width: 100%;
  display: block;
}

.wrap {
  width: min(calc(100% - 2rem), var(--wrap));
  margin: 0 auto;
}

.site-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.96), rgba(0, 0, 0, 0.92));
  border-bottom: 1px solid var(--border);
}

:root[data-theme="light"] .site-header {
  background: linear-gradient(180deg, rgba(246, 248, 250, 0.97), rgba(246, 248, 250, 0.93));
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.header-inner {
  gap: 1.5rem;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex: 1 1 auto;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-left: auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  text-decoration: none;
  font-weight: 800;
}

.brand-logo {
  width: 60px;
  height: 60px;
  object-fit: contain;
}

.brand-text {
  font-size: 1.45rem;
  font-weight: 800;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
}

.site-nav a,
.theme-toggle,
.menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  padding: 0.55rem 0.9rem;
  border-radius: var(--radius-control);
  border: 1px solid transparent;
  text-decoration: none;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
  text-align: center;
  white-space: normal;
}

.site-nav a[aria-current="page"],
.site-nav a:hover {
  background: linear-gradient(180deg, rgba(60, 110, 113, 0.24), rgba(40, 75, 99, 0.24));
  border-color: var(--accent);
  color: var(--text);
}

:root[data-theme="light"] .site-nav a[aria-current="page"],
:root[data-theme="light"] .site-nav a:hover {
  background: linear-gradient(180deg, rgba(154, 209, 212, 0.34), rgba(60, 110, 113, 0.14));
}

.theme-toggle,
.menu-toggle {
  background: rgba(154, 209, 212, 0.08);
  border-color: rgba(154, 209, 212, 0.22);
  color: var(--text);
  font: inherit;
  cursor: pointer;
}

:root[data-theme="light"] .theme-toggle,
:root[data-theme="light"] .menu-toggle {
  background: rgba(154, 209, 212, 0.18);
  border-color: rgba(60, 110, 113, 0.18);
}

.theme-toggle {
  width: 46px;
  height: 46px;
  padding: 0;
}

.theme-icon {
  font-size: 1.1rem;
  line-height: 1;
}

.theme-icon-sun {
  display: none;
}

:root[data-theme="light"] .theme-icon-moon {
  display: none;
}

:root[data-theme="light"] .theme-icon-sun {
  display: inline;
}

.menu-toggle {
  display: none;
  width: 46px;
  height: 46px;
  padding: 0;
  position: relative;
  z-index: 3;
}

.menu-toggle-icon {
  font-size: 1.2rem;
  line-height: 1;
}

.page-content {
  flex: 1;
  padding: 2rem 0 4rem;
}

.hero,
.panel,
.photo-panel,
.tutorial-step,
.member-card,
.coming-soon,
.download-card,
.detail-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
}

.hero {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 1.25rem;
  padding: 1.5rem;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, rgba(40, 75, 99, 0.34), rgba(53, 53, 53, 0.96) 38%, rgba(60, 110, 113, 0.3));
  border-color: rgba(154, 209, 212, 0.28);
}

:root[data-theme="light"] .hero {
  background: linear-gradient(135deg, rgba(154, 209, 212, 0.36), rgba(255, 255, 255, 0.98) 42%, rgba(40, 75, 99, 0.12));
  border-color: rgba(60, 110, 113, 0.22);
}

.hero-compact {
  grid-template-columns: 1fr;
}

.hero-copy h1,
.page-title {
  margin: 0.25rem 0 0.9rem;
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1;
}

.hero-copy p,
.page-lead,
.panel p,
.tutorial-step p,
.member-card p,
.download-card p,
.coming-soon p {
  color: var(--muted);
  line-height: 1.65;
  overflow-wrap: anywhere;
}

.eyebrow {
  margin: 0;
  color: var(--accent-soft);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.82rem;
  font-weight: 800;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 150px;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-pill);
  text-decoration: none;
  text-align: center;
  font-weight: 800;
}

.button-primary {
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
  color: var(--white);
}

.button-secondary {
  background: rgba(154, 209, 212, 0.08);
  color: var(--text);
  border: 1px solid rgba(154, 209, 212, 0.22);
}

:root[data-theme="light"] .button-secondary {
  background: rgba(154, 209, 212, 0.18);
  border-color: rgba(60, 110, 113, 0.18);
}

.hero-visual {
  display: grid;
  gap: 1rem;
}

.mini-stat-grid,
.card-grid,
.member-grid,
.download-grid,
.steps-grid {
  display: grid;
  gap: 1rem;
}

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

.mini-stat {
  padding: 1rem;
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(40, 75, 99, 0.48), rgba(0, 0, 0, 0.92));
  border: 1px solid rgba(154, 209, 212, 0.18);
}

:root[data-theme="light"] .mini-stat {
  background: linear-gradient(180deg, rgba(154, 209, 212, 0.3), rgba(255, 255, 255, 0.98));
  border-color: rgba(60, 110, 113, 0.16);
}

.mini-stat strong {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 1.5rem;
  color: var(--accent-soft);
}

.mini-stat span {
  color: var(--muted);
  font-size: 0.95rem;
}

.diagram {
  padding: 1.25rem;
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(40, 75, 99, 0.92), rgba(60, 110, 113, 0.9));
  border: 1px solid rgba(154, 209, 212, 0.24);
  color: #ffffff;
}

:root[data-theme="light"] .diagram {
  background: linear-gradient(180deg, rgba(40, 75, 99, 0.9), rgba(60, 110, 113, 0.78));
}

.diagram h2,
.panel h2,
.photo-panel h2,
.member-card h2,
.tutorial-step h2,
.download-card h2,
.detail-card h2 {
  margin-top: 0;
  overflow-wrap: anywhere;
}

.diagram-flow {
  display: grid;
  gap: 0.75rem;
}

.diagram-box {
  padding: 0.95rem 1rem;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(217, 217, 217, 0.16);
}

:root[data-theme="light"] .diagram-box {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.18);
}

.diagram-arrow {
  text-align: center;
  font-size: 1.2rem;
  color: var(--accent-soft);
}

.card-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-bottom: 1rem;
}

.panel,
.photo-panel,
.download-card,
.detail-card,
.tutorial-step,
.coming-soon,
.member-card {
  padding: 1.5rem;
}

.panel:nth-child(3n + 1),
.tutorial-step:nth-child(3n + 1),
.download-card:nth-child(3n + 1),
.detail-card,
.coming-soon {
  background: linear-gradient(180deg, rgba(60, 110, 113, 0.18), rgba(53, 53, 53, 0.96));
  border-color: rgba(60, 110, 113, 0.4);
}

.panel:nth-child(3n + 2),
.tutorial-step:nth-child(3n + 2),
.photo-panel,
.member-card:nth-child(4n + 2) {
  background: linear-gradient(180deg, rgba(40, 75, 99, 0.2), rgba(53, 53, 53, 0.96));
  border-color: rgba(40, 75, 99, 0.42);
}

.panel:nth-child(3n),
.tutorial-step:nth-child(3n),
.member-card:nth-child(4n + 1),
.member-card:nth-child(4n + 3),
.member-card:nth-child(4n + 4) {
  background: linear-gradient(180deg, rgba(154, 209, 212, 0.08), rgba(53, 53, 53, 0.98));
  border-color: rgba(154, 209, 212, 0.18);
}

:root[data-theme="light"] .panel:nth-child(3n + 1),
:root[data-theme="light"] .tutorial-step:nth-child(3n + 1),
:root[data-theme="light"] .download-card:nth-child(3n + 1),
:root[data-theme="light"] .detail-card,
:root[data-theme="light"] .coming-soon {
  background: linear-gradient(180deg, rgba(154, 209, 212, 0.22), rgba(255, 255, 255, 0.98));
  border-color: rgba(60, 110, 113, 0.2);
}

:root[data-theme="light"] .panel:nth-child(3n + 2),
:root[data-theme="light"] .tutorial-step:nth-child(3n + 2),
:root[data-theme="light"] .photo-panel,
:root[data-theme="light"] .member-card:nth-child(4n + 2) {
  background: linear-gradient(180deg, rgba(40, 75, 99, 0.1), rgba(255, 255, 255, 0.98));
  border-color: rgba(40, 75, 99, 0.16);
}

:root[data-theme="light"] .panel:nth-child(3n),
:root[data-theme="light"] .tutorial-step:nth-child(3n),
:root[data-theme="light"] .member-card:nth-child(4n + 1),
:root[data-theme="light"] .member-card:nth-child(4n + 3),
:root[data-theme="light"] .member-card:nth-child(4n + 4) {
  background: linear-gradient(180deg, rgba(238, 242, 246, 0.9), rgba(255, 255, 255, 0.98));
  border-color: rgba(154, 209, 212, 0.2);
}

.list,
.checklist {
  margin: 0.9rem 0 0;
  padding-left: 1.15rem;
  color: var(--muted);
}

.list li,
.checklist li {
  margin-bottom: 0.55rem;
  line-height: 1.55;
}

.photo-panel {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 1.25rem;
  align-items: center;
  margin-bottom: 1rem;
}

.photo-frame {
  min-height: 320px;
  overflow: hidden;
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(40, 75, 99, 0.65), rgba(0, 0, 0, 0.92));
  border: 1px solid rgba(154, 209, 212, 0.18);
  position: relative;
}

:root[data-theme="light"] .photo-frame {
  background: linear-gradient(180deg, rgba(154, 209, 212, 0.38), rgba(246, 248, 250, 0.96));
  border-color: rgba(60, 110, 113, 0.16);
}

.photo-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.photo-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(154, 209, 212, 0.06), transparent 45%, rgba(40, 75, 99, 0.16));
  opacity: 0.85;
  pointer-events: none;
  transition: opacity 180ms ease, filter 180ms ease;
}

.caption {
  font-size: 0.92rem;
  color: var(--muted);
}

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

.member-card.placeholder {
  position: relative;
}

.member-card .placeholder-headshot {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  margin-bottom: 1rem;
  background: var(--accent-soft);
  color: var(--bg);
  font-size: 1.6rem;
  font-weight: 800;
}

.contact-line {
  margin-top: 1rem;
  color: var(--accent-soft);
  font-size: 0.95rem;
  font-weight: 700;
}

.download-status {
  display: inline-flex;
  padding: 0.35rem 0.7rem;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--accent-soft), var(--accent));
  color: var(--white);
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

@media (hover: hover) and (pointer: fine) {
  .site-nav a:hover {
    transform: translateY(-1px);
    box-shadow: 0 0 0 1px rgba(154, 209, 212, 0.08), 0 10px 20px rgba(40, 75, 99, 0.22);
  }

  :root[data-theme="light"] .site-nav a:hover {
    box-shadow: 0 0 0 1px rgba(60, 110, 113, 0.08), 0 10px 20px rgba(40, 75, 99, 0.12);
  }

  .button:hover {
    transform: translateY(-2px) scale(1.01);
    box-shadow: 0 12px 28px rgba(40, 75, 99, 0.3);
  }

  :root[data-theme="light"] .button:hover {
    box-shadow: 0 12px 28px rgba(40, 75, 99, 0.18);
  }

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

  .button-secondary:hover,
  .theme-toggle:hover,
  .menu-toggle:hover {
    background: rgba(154, 209, 212, 0.14);
    border-color: rgba(154, 209, 212, 0.38);
  }

  :root[data-theme="light"] .button-secondary:hover,
  :root[data-theme="light"] .theme-toggle:hover,
  :root[data-theme="light"] .menu-toggle:hover {
    box-shadow: 0 10px 20px rgba(40, 75, 99, 0.12);
  }

  .hero:hover,
  .panel:hover,
  .photo-panel:hover,
  .tutorial-step:hover,
  .member-card:hover,
  .coming-soon:hover,
  .download-card:hover,
  .detail-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 34px rgba(0, 0, 0, 0.28);
  }

  :root[data-theme="light"] .hero:hover,
  :root[data-theme="light"] .panel:hover,
  :root[data-theme="light"] .photo-panel:hover,
  :root[data-theme="light"] .tutorial-step:hover,
  :root[data-theme="light"] .member-card:hover,
  :root[data-theme="light"] .coming-soon:hover,
  :root[data-theme="light"] .download-card:hover,
  :root[data-theme="light"] .detail-card:hover {
    box-shadow: 0 16px 34px rgba(40, 75, 99, 0.12);
  }

  .panel:hover,
  .tutorial-step:hover,
  .member-card:hover,
  .coming-soon:hover,
  .download-card:hover,
  .detail-card:hover {
    border-color: rgba(154, 209, 212, 0.34);
  }

  .mini-stat:hover {
    transform: translateY(-3px) scale(1.01);
    border-color: rgba(154, 209, 212, 0.34);
    box-shadow: 0 12px 26px rgba(40, 75, 99, 0.22);
  }

  :root[data-theme="light"] .mini-stat:hover {
    box-shadow: 0 12px 26px rgba(40, 75, 99, 0.12);
  }

  .diagram-box:hover {
    transform: translateX(4px);
    background: rgba(0, 0, 0, 0.28);
    border-color: rgba(154, 209, 212, 0.3);
  }

  .photo-panel:hover .photo-frame img,
  .hero:hover .photo-frame img,
  .photo-frame:hover img {
    transform: scale(1.035);
    filter: saturate(1.08) contrast(1.03);
  }

  .photo-panel:hover .photo-frame::after,
  .photo-frame:hover::after {
    opacity: 1;
  }

  .download-card:hover .download-status,
  .member-card:hover .placeholder-headshot {
    filter: brightness(1.08);
    transform: scale(1.04);
  }
}

.site-footer {
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.96), rgba(40, 75, 99, 0.22));
  border-top: 1px solid var(--border);
}

:root[data-theme="light"] .site-footer {
  background: linear-gradient(180deg, rgba(246, 248, 250, 0.96), rgba(154, 209, 212, 0.18));
}

.site-footer p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 900px) {
  .hero,
  .photo-panel,
  .card-grid,
  .member-grid,
  .download-grid,
  .steps-grid {
    grid-template-columns: 1fr;
  }

  .photo-frame {
    min-height: 240px;
  }
}

@media (max-width: 720px) {
  .site-header {
    position: static;
  }

  .header-top {
    position: relative;
    z-index: 2;
    align-items: center;
    padding-top: 0;
    padding-right: 3.4rem;
  }

  .header-inner {
    align-items: stretch;
    gap: 0.25rem;
  }

  .brand {
    flex: 0 1 auto;
  }

  .header-actions {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    margin-left: 0;
    margin-top: -0.1rem;
  }

  .header-actions.is-open {
    display: flex;
    width: fit-content;
    max-width: 100%;
    margin-left: auto;
    align-items: flex-end;
  }

  .menu-toggle {
    display: inline-flex;
    flex: 0 0 auto;
    align-self: flex-start;
    position: absolute;
    top: 0;
    right: 0;
  }

  :root.menu-open .menu-toggle {
    top: 0;
  }

  .site-nav {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }

  .site-nav a,
  .theme-toggle {
    width: 100%;
  }

  .header-actions.is-open .site-nav a,
  .header-actions.is-open .theme-toggle {
    width: auto;
    min-width: 0;
    padding-left: 0.8rem;
    padding-right: 0.8rem;
  }

  .header-actions.is-open .site-nav {
    width: auto;
    align-items: flex-end;
  }

  .header-actions.is-open .site-nav a {
    align-self: flex-end;
  }

  .header-actions.is-open .theme-toggle {
    align-self: flex-end;
  }

  .member-card .placeholder-headshot {
    width: 76px;
    height: 76px;
    font-size: 1.35rem;
  }

  .mini-stat strong {
    font-size: 1.35rem;
  }
}

@media (max-width: 640px) {
  .wrap {
    width: min(calc(100% - 1rem), var(--wrap));
  }

  .page-content {
    padding-top: 1rem;
    padding-bottom: 2.5rem;
  }

  .hero,
  .panel,
  .photo-panel,
  .tutorial-step,
  .member-card,
  .coming-soon,
  .download-card,
  .detail-card {
    padding: 1.15rem;
  }

  .brand-text {
    font-size: 1.2rem;
  }

  .hero-copy h1,
  .page-title {
    font-size: clamp(1.8rem, 9vw, 2.4rem);
  }

  .button-row {
    flex-direction: column;
  }

  .button,
  .member-card,
  .tutorial-step,
  .download-card,
  .detail-card,
  .panel {
    width: 100%;
    min-width: 0;
  }

  .mini-stat-grid {
    grid-template-columns: 1fr;
  }

  .photo-frame {
    min-height: 180px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }

  .footer-inner p {
    width: 100%;
  }
}

@media (max-width: 420px) {
  .hero,
  .panel,
  .photo-panel,
  .tutorial-step,
  .member-card,
  .coming-soon,
  .download-card,
  .detail-card {
    padding: 1rem;
    border-radius: 14px;
  }

  .brand-logo {
    width: 48px;
    height: 48px;
  }

  .member-card .placeholder-headshot {
    width: 68px;
    height: 68px;
    font-size: 1.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  a,
  button,
  .button,
  .site-nav a,
  .theme-toggle,
  .menu-toggle,
  .hero,
  .panel,
  .photo-panel,
  .tutorial-step,
  .member-card,
  .coming-soon,
  .download-card,
  .detail-card,
  .mini-stat,
  .diagram-box,
  .photo-frame img,
  .photo-frame::after {
    transition: none;
  }

  .site-nav a:hover,
  .button:hover,
  .theme-toggle:hover,
  .menu-toggle:hover,
  .hero:hover,
  .panel:hover,
  .photo-panel:hover,
  .tutorial-step:hover,
  .member-card:hover,
  .coming-soon:hover,
  .download-card:hover,
  .detail-card:hover,
  .mini-stat:hover,
  .diagram-box:hover,
  .photo-panel:hover .photo-frame img,
  .hero:hover .photo-frame img,
  .photo-frame:hover img,
  .download-card:hover .download-status,
  .member-card:hover .placeholder-headshot {
    transform: none;
    filter: none;
    box-shadow: none;
  }
}