:root {
  --bg: #07090f;
  --bg-soft: #0d111a;
  --panel: rgba(18, 23, 32, .86);
  --panel-strong: rgba(24, 30, 42, .94);
  --line: rgba(255, 255, 255, .1);
  --line-strong: rgba(255, 255, 255, .18);
  --text: #f5f7fb;
  --muted: #9ba6b5;
  --soft: #c4cfdd;
  --accent: #ffcf5d;
  --red: #ff5f6d;
  --green: #48d597;
  --blue: #6aa7ff;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(115, 90, 255, .16), transparent 32rem),
    radial-gradient(circle at 88% 12%, rgba(255, 119, 79, .12), transparent 28rem),
    linear-gradient(180deg, #0b0f17 0%, #07090f 48%, #05070b 100%);
  overflow-x: hidden;
}

body.nav-open {
  overflow-x: hidden;
}

body.calm-mode .page-glow {
  opacity: .35;
}

body.calm-mode .grain {
  opacity: .02;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

.page-glow {
  position: fixed;
  inset: auto -10% 0 -10%;
  height: 38vh;
  pointer-events: none;
  background: linear-gradient(90deg, rgba(255, 207, 93, .08), rgba(106, 167, 255, .06), rgba(255, 95, 109, .06));
  filter: blur(70px);
  z-index: -2;
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 100;
  opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 260 260' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='.72' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='260' height='260' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
}

.top-nav {
  position: sticky;
  top: 0;
  z-index: 60;
  width: 100%;
  min-height: 72px;
  padding: 0 max(18px, calc((100vw - var(--max)) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 9, 15, .82);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  color: #101010;
  background: linear-gradient(135deg, var(--accent), #fff4b0);
  box-shadow: 0 0 28px rgba(255, 207, 93, .24);
  font-size: 12px;
  font-weight: 950;
}

.brand-text {
  display: grid;
  gap: 2px;
}

.brand strong {
  font-size: 17px;
  letter-spacing: .04em;
}

.brand small {
  color: var(--muted);
  font-size: 11px;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  flex: 1 1 auto;
}

.site-nav a {
  position: relative;
  color: var(--soft);
  font-size: 14px;
  font-weight: 750;
  padding: 26px 12px;
  transition: color .18s ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 18px;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform .18s ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: #fff;
}

.site-nav a:hover::after,
.site-nav a.active::after {
  transform: scaleX(1);
}

.sound-btn,
.menu-toggle,
.btn,
.bookmark-filter button {
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, .055);
  color: #edf3fb;
  cursor: pointer;
}

.sound-btn {
  flex: 0 0 auto;
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 12px;
  font-weight: 850;
  letter-spacing: .04em;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  place-items: center;
  padding: 10px;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 2px 0;
  border-radius: 999px;
  background: #fff;
  transition: transform .18s ease, opacity .18s ease;
}

body.nav-open .menu-toggle span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

body.nav-open .menu-toggle span:nth-child(2) {
  opacity: 0;
}

body.nav-open .menu-toggle span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.float-menu {
  position: fixed;
  z-index: 55;
  left: 10px;
  top: 50%;
  width: 54px;
  padding: 8px;
  border: 1px solid rgba(255, 255, 255, .09);
  border-radius: 10px;
  background: rgba(10, 13, 20, .74);
  backdrop-filter: blur(14px);
  box-shadow: 0 18px 50px rgba(0, 0, 0, .28);
  transform: translate(-210px, -50%);
  opacity: 0;
  transition: transform .28s ease, opacity .28s ease;
}

.float-menu.visible {
  transform: translate(0, -50%);
  opacity: 1;
}

.float-menu:hover,
.float-menu:focus-within {
  width: 172px;
}

.menu-title {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin: 4px 7px 8px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: .12em;
}

.menu-title span,
.online-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 12px rgba(72, 213, 151, .75);
}

.float-menu a {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  padding: 9px 9px;
  border-radius: 7px;
  color: #aab5c3;
  transition: background .18s ease, color .18s ease;
}

.float-menu a b {
  color: #e6edf7;
  font-size: 10px;
}

.float-menu a em {
  display: none;
  font-style: normal;
  font-size: 12px;
  font-weight: 750;
}

.float-menu:hover .menu-title,
.float-menu:focus-within .menu-title,
.float-menu:hover a,
.float-menu:focus-within a {
  justify-content: flex-start;
}

.float-menu:hover a em,
.float-menu:focus-within a em {
  display: inline;
}

.float-menu a:hover,
.float-menu a.active {
  background: rgba(255, 255, 255, .07);
  color: #fff;
}

.hero,
.section,
footer {
  width: min(var(--max), calc(100% - 28px));
  margin: 0 auto;
}

.hero {
  padding: 18px 0 20px;
}

.hero-carousel {
  position: relative;
  min-height: 460px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: #111721;
  box-shadow: 0 26px 70px rgba(0, 0, 0, .34);
}

.carousel-track,
.carousel-slide,
.carousel-shade {
  position: absolute;
  inset: 0;
}

.carousel-slide {
  opacity: 0;
  transform: scale(1.02);
  background-image: var(--image);
  background-size: cover;
  background-position: center;
  transition: opacity .7s ease, transform 1.2s ease;
}

.carousel-slide.active {
  opacity: 1;
  transform: scale(1);
}

.carousel-shade {
  z-index: 1;
  background:
    linear-gradient(90deg, rgba(5, 7, 12, .92) 0%, rgba(5, 7, 12, .64) 42%, rgba(5, 7, 12, .16) 100%),
    linear-gradient(0deg, rgba(5, 7, 12, .75) 0%, transparent 52%);
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(610px, 68%);
  padding: 74px 64px;
}

.eyebrow,
.section-head p,
.panel-label {
  margin: 0;
  color: var(--accent);
  font-size: 12px;
  font-weight: 950;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 14px 0 16px;
  font-size: clamp(42px, 6vw, 72px);
  line-height: 1.02;
  letter-spacing: 0;
}

.hero-lead {
  margin: 0;
  max-width: 560px;
  color: #d7e0ec;
  font-size: 17px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 850;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}

.btn:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, .28);
}

.btn.primary {
  border-color: rgba(255, 207, 93, .55);
  color: #15120a;
  background: linear-gradient(135deg, var(--accent), #ffeaa0);
}

.btn.ghost,
.btn.compact {
  background: rgba(255, 255, 255, .07);
}

.btn.compact {
  min-height: 38px;
  padding: 8px 12px;
  font-size: 13px;
}

.hero-status-card {
  position: absolute;
  z-index: 2;
  right: 24px;
  bottom: 24px;
  display: grid;
  gap: 4px;
  width: 230px;
  padding: 15px;
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 8px;
  background: rgba(12, 16, 24, .68);
  backdrop-filter: blur(12px);
}

.hero-status-card small {
  color: var(--green);
  font-size: 11px;
  font-weight: 900;
}

.hero-status-card strong {
  font-size: 17px;
}

.hero-status-card span {
  color: var(--muted);
  font-size: 13px;
}

.dots {
  position: absolute;
  z-index: 4;
  left: 64px;
  bottom: 28px;
  display: flex;
  gap: 8px;
}

.dots button {
  width: 22px;
  height: 4px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, .35);
  cursor: pointer;
}

.dots button.active {
  background: var(--accent);
}

.section {
  padding: 24px 0;
  scroll-margin-top: 88px;
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}

.section-head h2 {
  margin: 0;
  color: #fff;
  font-size: 24px;
  line-height: 1.2;
}

.inline-head {
  align-items: end;
  justify-content: space-between;
  gap: 16px;
}

.section-note {
  color: var(--muted);
  font-size: 13px;
}

.portal {
  padding-top: 8px;
}

.video-row {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 230px;
  gap: 14px;
  overflow-x: auto;
  padding: 2px 2px 14px;
  scrollbar-color: rgba(255, 255, 255, .24) transparent;
}

.video-card {
  position: relative;
  display: flex;
  min-height: 142px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background-image: linear-gradient(180deg, rgba(4, 6, 10, .05), rgba(4, 6, 10, .9) 78%), var(--cover);
  background-size: cover;
  background-position: center;
  transition: transform .18s ease, border-color .18s ease;
}

.video-card:hover,
.project-card:hover,
.resource-card:hover,
.bookmark-card:hover,
.feed-card:hover,
.friend-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, .24);
}

.video-card-content {
  align-self: flex-end;
  width: 100%;
  padding: 12px;
}

.video-card h3 {
  margin: 0 0 7px;
  font-size: 15px;
}

.video-card p {
  margin: 0;
  color: #c7d0dd;
  font-size: 12px;
  line-height: 1.45;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 3px 7px;
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 5px;
  color: #dfe8f4;
  background: rgba(0, 0, 0, .24);
  font-size: 11px;
  font-weight: 750;
}

.module-zone {
  padding-top: 8px;
}

.module-grid {
  display: grid;
  grid-template-columns: 1.15fr .9fr .85fr;
  gap: 14px;
}

.feature-panel,
.friend-board,
.friend-card,
.project-card,
.resource-card,
.bookmark-card,
.message,
.message-form,
.feed-card,
.lab-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  backdrop-filter: blur(10px);
}

.feature-panel {
  position: relative;
  min-height: 230px;
  padding: 18px;
}

.status-panel .online-dot {
  position: absolute;
  top: 20px;
  right: 18px;
}

.feature-panel h2 {
  margin: 12px 0 10px;
  font-size: 23px;
}

.feature-panel p,
.friend-board p,
.project-card p,
.resource-card p,
.bookmark-card p,
.message p,
.lab-panel span {
  color: #b5c0cf;
  line-height: 1.65;
  font-size: 13px;
}

.status-list,
.friend-status,
.updates,
.quick-links {
  display: grid;
  gap: 9px;
  margin-top: 14px;
}

.status-list div,
.updates div,
.friend-status div,
.quick-links a {
  padding: 10px;
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 7px;
  background: rgba(255, 255, 255, .035);
  color: #d7e0ec;
  font-size: 13px;
}

.status-list strong,
.updates strong {
  color: #fff;
  margin-right: 6px;
}

.updates p {
  margin: 5px 0 0;
}

.update-item {
  display: grid;
  gap: 5px;
}

.update-top {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.update-top span {
  color: #eef4fb;
  font-weight: 850;
  overflow-wrap: anywhere;
}

.quick-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: background .18s ease;
}

.quick-links a:hover {
  background: rgba(255, 255, 255, .07);
}

.friend-layout {
  display: grid;
  grid-template-columns: .82fr 1.18fr;
  gap: 14px;
}

.friend-board {
  padding: 18px;
}

.friend-board h3,
.project-card h3,
.resource-card h3,
.bookmark-card h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.friend-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.friend-card {
  padding: 14px;
  background: var(--panel-strong);
  transition: transform .18s ease, border-color .18s ease;
}

.avatar {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  color: #101010;
  background: linear-gradient(135deg, #fff, var(--accent));
  font-weight: 950;
}

.avatar img {
  width: 100%;
  height: 100%;
  border-radius: inherit;
  object-fit: cover;
}

.friend-card h3 {
  margin: 12px 0 6px;
  font-size: 16px;
}

.friend-card p {
  margin: 0;
  min-height: 58px;
  color: #aeb8c8;
  font-size: 12px;
  line-height: 1.55;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.project-card,
.resource-card,
.bookmark-card {
  padding: 16px;
  transition: transform .18s ease, border-color .18s ease;
}

.project-card .btn {
  margin-top: 14px;
}

.resource-dock {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
}

.resource-card {
  min-height: 148px;
}

.resource-card .icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin-bottom: 14px;
  border-radius: 8px;
  background: rgba(255, 255, 255, .08);
  font-size: 21px;
}

.bookmark-section {
  padding-bottom: 30px;
}

.bookmark-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: -2px 0 14px;
}

.bookmark-filter button {
  min-height: 34px;
  border-radius: 7px;
  padding: 7px 11px;
  color: var(--soft);
  font-size: 13px;
  font-weight: 800;
}

.bookmark-filter button.active {
  color: #111;
  border-color: transparent;
  background: var(--accent);
}

.bookmark-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.bookmark-card {
  min-height: 166px;
  background: linear-gradient(180deg, rgba(255, 255, 255, .045), rgba(255, 255, 255, .018)), var(--panel);
}

.bookmark-card small {
  display: inline-flex;
  color: var(--accent);
  font-size: 11px;
  font-weight: 900;
}

.feed-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.feed-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  background: linear-gradient(180deg, rgba(255, 255, 255, .045), rgba(255, 255, 255, .018)), var(--panel);
  transition: transform .18s ease, border-color .18s ease;
}

.feed-card time,
.message time {
  color: var(--muted);
  font-size: 12px;
}

.feed-card h3 {
  margin: 0;
  font-size: 19px;
}

.feed-card p {
  margin: 0;
  color: #c1cbd8;
  line-height: 1.7;
  font-size: 13px;
  white-space: pre-wrap;
}

.feed-media {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.feed-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: rgba(255, 255, 255, .04);
}

.feed-video {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  border: 1px solid rgba(255, 207, 93, .38);
  border-radius: 7px;
  color: var(--accent);
  background: rgba(255, 207, 93, .08);
  font-size: 13px;
  font-weight: 850;
}

.empty-state {
  grid-column: 1 / -1;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: rgba(255, 255, 255, .035);
}

.guestbook-layout {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 14px;
}

.message-form {
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 16px;
}

.message-form label {
  display: grid;
  gap: 7px;
}

.message-form span {
  color: var(--accent);
  font-size: 12px;
  font-weight: 900;
}

.message-form input,
.message-form textarea {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  outline: 0;
  color: var(--text);
  background: rgba(255, 255, 255, .055);
  padding: 11px 12px;
  font: inherit;
  resize: vertical;
}

.message-form input:focus,
.message-form textarea:focus {
  border-color: rgba(255, 207, 93, .62);
}

.form-hint {
  min-height: 20px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.message-wall {
  display: grid;
  gap: 10px;
}

.message {
  display: grid;
  grid-template-columns: 130px 1fr auto;
  gap: 12px;
  padding: 13px;
}

.message strong {
  color: #fff;
}

.message p {
  margin: 0;
}

.lab-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 18px;
}

.lab-panel div {
  display: grid;
  gap: 5px;
}

.lab-panel strong {
  color: #fff;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  margin-top: 8px;
  padding: 20px 0 28px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

footer strong {
  color: #fff;
}

@media (max-width: 1100px) {
  .module-grid {
    grid-template-columns: 1fr 1fr;
  }

  .quick-panel {
    grid-column: 1 / -1;
  }

  .friend-cards,
  .feed-grid,
  .bookmark-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .resource-dock {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 860px) {
  .top-nav {
    min-height: 64px;
    flex-wrap: wrap;
    align-content: center;
    padding-top: 10px;
    padding-bottom: 10px;
  }

  .brand small,
  .sound-btn,
  .float-menu {
    display: none;
  }

  .menu-toggle {
    display: grid;
  }

  .site-nav {
    position: static;
    order: 3;
    flex: 0 0 100%;
    width: 100%;
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: rgba(9, 12, 18, .96);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .05);
  }

  body.nav-open .site-nav {
    display: grid;
  }

  .site-nav a {
    padding: 12px;
    border-radius: 7px;
    background: rgba(255, 255, 255, .05);
  }

  .site-nav a::after {
    display: none;
  }

  .hero,
  .section,
  footer {
    width: min(100% - 20px, var(--max));
  }

  .hero-carousel {
    min-height: 420px;
  }

  .hero-content {
    width: 100%;
    padding: 50px 24px 120px;
  }

  .hero-lead {
    font-size: 15px;
  }

  .hero-status-card {
    left: 24px;
    right: 24px;
    bottom: 22px;
    width: auto;
  }

  .dots {
    left: 24px;
    bottom: 104px;
  }

  .inline-head,
  .section-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .module-grid,
  .friend-layout,
  .project-grid,
  .feed-grid,
  .guestbook-layout,
  .lab-panel {
    grid-template-columns: 1fr;
  }

  .video-row {
    grid-auto-columns: 78vw;
  }

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

@media (max-width: 560px) {
  .brand strong {
    font-size: 15px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
  }

  .hero {
    padding-top: 10px;
  }

  .hero-carousel {
    min-height: 440px;
    border-radius: 8px;
  }

  .hero h1 {
    font-size: 38px;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .section {
    padding: 18px 0;
  }

  .section-head h2 {
    font-size: 21px;
  }

  .friend-cards,
  .resource-dock,
  .bookmark-grid {
    grid-template-columns: 1fr;
  }

  .resource-card,
  .bookmark-card {
    min-height: auto;
  }

  footer {
    flex-direction: column;
  }
}