:root {
  --bg: #111315;
  --fg: #e3e6e8;
  --muted: #9da4aa;
  --panel: #1a1d20;
  --line: #2c3136;
  --accent: #3d8a6b;
  --accent-fg: #f4faf7;
  --ease-smooth: cubic-bezier(0.2, 0.8, 0.2, 1);
  --dur-fast: 460ms;
  --dur-mid: 820ms;
  --dur-slow: 1200ms;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--fg);
  background: radial-gradient(circle at 10% 10%, #1a1d20, var(--bg));
}

.shell {
  min-height: 100vh;
  width: 100%;
  max-width: 1360px;
  margin: 0 auto;
  padding: 56px 24px 80px;
}

.hero {
  width: 100%;
  text-align: left;
}

h1 {
  font-size: clamp(1.8rem, 3.2vw, 2.8rem);
  line-height: 1.2;
  margin: 0 0 24px;
}

h1 span {
  display: block;
  white-space: nowrap;
}

.content-stage.split-open h1 span {
  white-space: normal;
  overflow-wrap: anywhere;
}

.top-band {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 0;
  background: transparent;
}

.band-link {
  border: 0;
  border-radius: 999px;
  padding: 7px 10px;
  background: transparent;
  color: #c9d0d5;
  font: inherit;
  font-size: 0.94rem;
  letter-spacing: 0.01em;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  transition:
    background-color var(--dur-mid) var(--ease-smooth),
    color var(--dur-mid) var(--ease-smooth),
    transform var(--dur-fast) var(--ease-smooth),
    opacity var(--dur-mid) var(--ease-smooth);
}

.band-link:hover {
  transform: translateY(-1px) scale(1.01);
  color: #e6ecef;
  background: rgba(29, 34, 39, 0.55);
}

.band-link.active {
  background: rgba(61, 138, 107, 0.24);
  color: var(--accent-fg);
}

.content-stage {
  margin-top: 34px;
  width: 100%;
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.chat-column {
  position: relative;
  left: 50%;
  transform: translateX(-50%);
  flex: 0 0 auto;
  min-width: 0;
  max-width: 760px;
  width: min(100%, 760px);
  transition:
    width calc(var(--dur-slow) + 80ms) var(--ease-smooth),
    left calc(var(--dur-slow) + 80ms) var(--ease-smooth),
    transform calc(var(--dur-slow) + 80ms) var(--ease-smooth),
    max-width calc(var(--dur-slow) + 80ms) var(--ease-smooth);
  will-change: transform;
}

.content-stage.split-open .chat-column {
  left: 0;
  flex-basis: calc(50% - 10px);
  max-width: none;
  width: calc(50% - 10px);
  transform: translateX(0);
  padding-left: 6px;
  box-sizing: border-box;
}

.detail-pane {
  flex: 0 0 0;
  min-width: 0;
  max-width: 0;
  max-height: 0;
  opacity: 0;
  transform: translateX(110%);
  pointer-events: none;
  overflow: hidden;
  transition:
    flex-basis calc(var(--dur-slow) + 80ms) var(--ease-smooth),
    max-width calc(var(--dur-slow) + 80ms) var(--ease-smooth),
    max-height calc(var(--dur-slow) + 80ms) var(--ease-smooth),
    opacity calc(var(--dur-mid) + 200ms) var(--ease-smooth),
    transform calc(var(--dur-slow) + 80ms) var(--ease-smooth);
}

.content-stage.split-open .detail-pane {
  flex-basis: calc(50% - 10px);
  max-width: calc(50% - 10px);
  max-height: 6000px;
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

.detail-shell {
  position: relative;
  min-height: 280px;
  border: 0;
  border-radius: 0;
  background: transparent;
  padding: 12px 6px 6px;
  box-shadow: none;
}

.detail-close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 32px;
  height: 32px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #171b1f;
  color: var(--fg);
  font: inherit;
  cursor: pointer;
  z-index: 5;
  transition:
    background-color var(--dur-mid) var(--ease-smooth),
    border-color var(--dur-mid) var(--ease-smooth),
    transform var(--dur-fast) var(--ease-smooth);
}

.detail-close:hover {
  transform: translateY(-1px);
  background: #1f2429;
}

.detail-content {
  padding-right: 26px;
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity calc(var(--dur-mid) - 120ms) var(--ease-smooth),
    transform calc(var(--dur-mid) - 80ms) var(--ease-smooth);
}

.top-band-links {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-left: 8px;
}

.top-band-links a {
  color: #c9d0d5;
  text-decoration: none;
  border-radius: 999px;
  padding: 7px 10px;
  transition:
    color var(--dur-mid) var(--ease-smooth),
    background-color var(--dur-mid) var(--ease-smooth),
    transform var(--dur-fast) var(--ease-smooth);
}

.top-band-links a:hover {
  color: #e6ecef;
  background: rgba(29, 34, 39, 0.55);
  transform: translateY(-1px) scale(1.01);
}

.top-band-links .top-band-action {
  color: var(--accent);
  font-weight: 700;
  padding: 7px 10px;
  border-radius: 0;
}

.top-band-links .top-band-action:hover {
  color: #8fdcba;
  background: transparent;
  transform: translateY(-1px);
}

.detail-content.visible {
  opacity: 1;
  transform: translateY(0);
}

.detail-title {
  margin: 0 0 12px;
  font-size: clamp(1.1rem, 2vw, 1.6rem);
  line-height: 1.3;
}

.detail-summary {
  margin: 0 0 18px;
  color: #ccd1d6;
}

.detail-section {
  margin-top: 14px;
}

.detail-heading {
  margin: 18px 0 8px;
  font-size: 1rem;
}

.detail-copy {
  margin: 0 0 12px;
  color: #cfd4d9;
  line-height: 1.55;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.detail-list {
  margin: 0 0 12px;
  padding-left: 18px;
  color: #cfd4d9;
  display: grid;
  gap: 6px;
}

.detail-content > :first-child.detail-heading {
  margin-top: 0;
}

.detail-separator {
  border: 0;
  border-top: 1px solid rgba(157, 164, 170, 0.28);
  margin: 18px 0;
}

.detail-indent-0 {
  margin-left: 0;
}

.detail-indent-1 {
  margin-left: 18px;
  padding-left: 14px;
  border-left: 1px solid rgba(157, 164, 170, 0.24);
}

.detail-indent-2 {
  margin-left: 36px;
  padding-left: 14px;
  border-left: 1px solid rgba(157, 164, 170, 0.18);
}

.personal-projects-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 10px;
}

.personal-project-tile {
  min-height: 92px;
  border: 1px solid rgba(157, 164, 170, 0.26);
  border-radius: 12px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0));
  padding: 14px 16px;
  display: flex;
  align-items: center;
  opacity: 0;
  transform: translateX(24px);
  box-shadow: 0 0 0 rgba(61, 138, 107, 0);
  transition:
    opacity calc(var(--dur-mid) - 220ms) var(--ease-smooth),
    transform 180ms var(--ease-smooth),
    box-shadow 180ms var(--ease-smooth),
    border-color 180ms var(--ease-smooth);
}

.detail-content.visible .personal-project-tile {
  opacity: 1;
  transform: translateX(0);
}

.detail-content.visible .personal-project-tile:hover,
.detail-content.visible .personal-project-tile:focus-visible {
  transform: translateX(0) translateY(-2px) scale(1.03);
  transition-delay: 0ms;
  box-shadow:
    0 14px 24px rgba(0, 0, 0, 0.34),
    0 0 14px rgba(61, 138, 107, 0.28);
  border-color: rgba(107, 178, 146, 0.7);
}

.detail-content.visible .personal-project-tile:nth-child(1) {
  transition-delay: 40ms;
}

.detail-content.visible .personal-project-tile:nth-child(2) {
  transition-delay: 90ms;
}

.detail-content.visible .personal-project-tile:nth-child(3) {
  transition-delay: 140ms;
}

.detail-content.visible .personal-project-tile:nth-child(4) {
  transition-delay: 190ms;
}

.detail-content.visible .personal-project-tile:nth-child(5) {
  transition-delay: 240ms;
}

.detail-content.visible .personal-project-tile:nth-child(6) {
  transition-delay: 290ms;
}

.detail-content.visible .personal-project-tile:nth-child(7) {
  transition-delay: 340ms;
}

.detail-content.visible .personal-project-tile:nth-child(8) {
  transition-delay: 390ms;
}

.detail-content.visible .personal-projects-grid .personal-project-tile:hover,
.detail-content.visible .personal-projects-grid .personal-project-tile:focus-visible {
  transition-delay: 0ms;
}

.personal-project-tile-title {
  margin: 0;
  font-size: 1rem;
  color: #dce2e6;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.primary,
.ghost {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 16px;
  cursor: pointer;
  font: inherit;
  transition:
    background-color var(--dur-mid) var(--ease-smooth),
    border-color var(--dur-mid) var(--ease-smooth),
    color var(--dur-mid) var(--ease-smooth),
    filter var(--dur-mid) var(--ease-smooth),
    transform var(--dur-fast) var(--ease-smooth);
}

.primary {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: var(--accent);
}

.primary:hover {
  filter: brightness(1.05);
}

.ghost {
  background: transparent;
  color: var(--fg);
}

.contacts {
  margin-top: 20px;
  display: flex;
  justify-content: flex-start;
  gap: 12px;
  flex-wrap: wrap;
}

.contacts a {
  color: #c8ced3;
  transition: color var(--dur-mid) var(--ease-smooth);
}

.chat-inline {
  width: 100%;
  margin-top: 18px;
  display: block;
  opacity: 0;
  transform: translateY(8px);
  max-height: 0;
  visibility: hidden;
  overflow: hidden;
  pointer-events: none;
  transition:
    opacity var(--dur-mid) var(--ease-smooth),
    transform calc(var(--dur-mid) + 120ms) var(--ease-smooth),
    max-height calc(var(--dur-slow) + 60ms) var(--ease-smooth),
    visibility 0ms linear calc(var(--dur-slow) + 60ms);
}

.chat-inline.open {
  opacity: 1;
  transform: translateY(0);
  max-height: 3000px;
  visibility: visible;
  pointer-events: auto;
  transition:
    opacity var(--dur-mid) var(--ease-smooth),
    transform calc(var(--dur-mid) + 120ms) var(--ease-smooth),
    max-height calc(var(--dur-slow) + 60ms) var(--ease-smooth),
    visibility 0ms;
}

.messages {
  padding: 6px 0 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.msg {
  padding: 10px 12px;
  border-radius: 12px;
  max-width: 90%;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity var(--dur-mid) var(--ease-smooth),
    transform calc(var(--dur-mid) + 120ms) var(--ease-smooth);
}

.msg.show {
  opacity: 1;
  transform: translateY(0);
}

.msg.user {
  align-self: flex-end;
  background: #23292e;
  transition-duration: var(--dur-mid), calc(var(--dur-mid) + 120ms);
}

.msg.ai {
  align-self: flex-start;
  background: #1f2327;
  transition-duration: var(--dur-slow), calc(var(--dur-slow) + 180ms);
}

.msg.spark {
  animation: msg-spark 650ms var(--ease-smooth) 1;
}

@keyframes msg-spark {
  0% {
    box-shadow: 0 0 0 rgba(107, 178, 146, 0);
    transform: translateY(8px) scale(0.995);
  }
  35% {
    box-shadow:
      0 0 0 1px rgba(143, 220, 186, 0.95),
      0 0 18px rgba(143, 220, 186, 0.55);
    transform: translateY(0) scale(1.012);
  }
  100% {
    box-shadow: 0 0 0 rgba(107, 178, 146, 0);
    transform: translateY(0) scale(1);
  }
}

.msg small {
  display: block;
  margin-top: 6px;
  color: var(--muted);
}

.chat-form {
  display: flex;
  gap: 8px;
  padding: 10px 0 0;
}

.chat-form input {
  flex: 1;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
  color: var(--fg);
  background: #14171a;
}

.muted {
  color: var(--muted);
}

@media (max-width: 860px) {
  .content-stage {
    display: block;
  }

  .chat-column,
  .content-stage.split-open .chat-column {
    left: 0;
    transform: none;
    width: min(100%, 760px);
    max-width: 760px;
    margin: 0 auto;
    flex-basis: auto;
  }

  .detail-pane,
  .content-stage.split-open .detail-pane {
    max-width: 760px;
    max-height: 0;
    margin: 0 auto;
    opacity: 0;
    transform: translateY(12px);
    pointer-events: none;
    transition:
      max-height calc(var(--dur-mid) + 100ms) var(--ease-smooth),
      opacity var(--dur-mid) var(--ease-smooth),
      transform calc(var(--dur-mid) + 120ms) var(--ease-smooth),
      margin-top calc(var(--dur-mid) + 100ms) var(--ease-smooth);
  }

  .content-stage.split-open .detail-pane {
    max-height: 10000px;
    margin-top: 14px;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .detail-shell {
    padding: 10px 0 0;
  }

  .detail-content {
    padding-right: 0;
  }
}

@media (max-width: 700px) {
  h1 {
    font-size: clamp(1.15rem, 4.2vw, 1.8rem);
  }

  h1 span {
    white-space: normal;
    overflow-wrap: anywhere;
  }

  .shell {
    padding: 36px 16px 56px;
  }

  .top-band {
    gap: 6px;
    justify-content: flex-start;
  }

  .band-link {
    padding: 7px 9px;
    font-size: 0.92rem;
  }

  .chat-form {
    flex-direction: column;
  }

  .personal-projects-grid {
    grid-template-columns: 1fr;
  }
}