@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

@font-face {
  font-family: 'VCR OSD Mono';
  src: url('public/fonts/VCR_OSD_MONO.ttf') format('truetype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Berkeley Mono';
  src: url('public/fonts/BerkeleyMono-Regular.otf') format('opentype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Advercase';
  src: url('public/fonts/Advercase-Font-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Advercase';
  src: url('public/fonts/Advercase-Font-Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #000000;
  --bg-card: #181818;
  --bg-secondary: #1A1A1A;
  --text: #DEDEDE;
  --text-muted: #A7A7A7;
  --sub: #8A8A8A;
  --border: #2D2D2D;
  --border-hover: #3a3a3a;
  --btn-hover-bg: rgba(255, 255, 255, 0.06);
  --accent: #5AC8FA;
  --accent-dim: rgba(90, 200, 250, 0.15);
  --radius: 0.75rem;
  --radius-xl: 1rem;
  --font-mono: 'VCR OSD Mono', 'SF Mono', 'Fira Code', 'JetBrains Mono', ui-monospace, monospace;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #ffffff;
    --bg-card: #f7f7f8;
    --bg-secondary: #f0f0f2;
    --text: #1a1a2e;
    --text-muted: #555568;
    --sub: #6b7094;
    --border: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(0, 0, 0, 0.15);
    --btn-hover-bg: rgba(0, 0, 0, 0.04);
    --accent: #3b8bdb;
    --accent-dim: rgba(59, 139, 219, 0.1);
  }
}

:root[data-theme="light"] {
  --bg: #ffffff;
  --bg-card: #f7f7f8;
  --bg-secondary: #f0f0f2;
  --text: #1a1a2e;
  --text-muted: #555568;
  --sub: #6b7094;
  --border: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(0, 0, 0, 0.15);
  --btn-hover-bg: rgba(0, 0, 0, 0.04);
  --accent: #3b8bdb;
  --accent-dim: rgba(59, 139, 219, 0.1);
}

html,
body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  background: var(--bg);
}

::selection {
  background: var(--accent);
  color: #000;
}

/* ---- Container / Hero ---- */

.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  position: relative;
  z-index: 1;
  padding: 24px;
  padding-top: 120px;
  padding-bottom: 72px;
}

.hero-brand {
  position: relative;
  display: inline-block;
}

.logo-sticker {
  position: absolute;
  width: 64px;
  height: 64px;
  object-fit: contain;
  top: -24px;
  right: -52px;
  transform: rotate(14deg);
  filter: drop-shadow(2px 3px 6px rgba(0, 0, 0, 0.35));
  pointer-events: none;
  z-index: 2;
}

.wordmark {
  font-family: 'Advercase', var(--font-mono);
  font-size: 64px;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--text);
  line-height: 1.05;
}

.tagline {
  font-size: 15px;
  font-weight: 400;
  color: var(--sub);
  letter-spacing: 0.01em;
  margin-top: -8px;
  max-width: 420px;
  text-align: center;
  line-height: 1.5;
}

/* ---- CTA ---- */

.cta-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 8px;
}

.github-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border);
  text-decoration: none;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.github-link:hover {
  color: var(--text);
  border-color: var(--border-hover);
  background: var(--btn-hover-bg);
}

.github-link svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ---- Download button (split) ---- */

.download-split {
  display: inline-flex;
  position: relative;
  border-radius: var(--radius);
  overflow: visible;
}

.download-main {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px 12px 24px;
  border-radius: var(--radius) 0 0 var(--radius);
  border: none;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #fff;
  background: linear-gradient(135deg, #4f8fff 0%, #6da8ff 50%, #88baff 100%);
  box-shadow: 0 2px 8px rgba(79, 143, 255, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  text-decoration: none;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transition: filter 0.15s;
}

.download-main:hover {
  filter: brightness(1.1);
}

.download-main::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.download-main svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.download-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 14px;
  border: none;
  border-left: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: #fff;
  background: linear-gradient(135deg, #4f8fff 0%, #6da8ff 50%, #88baff 100%);
  box-shadow: 0 2px 8px rgba(79, 143, 255, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: filter 0.15s;
}

.download-toggle:hover {
  filter: brightness(0.9);
}

.download-toggle::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.download-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px;
  z-index: 10;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  display: none;
}

.download-dropdown.open {
  display: block;
}

.download-option {
  display: block;
  width: 100%;
  padding: 10px 14px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 400;
  text-align: left;
  cursor: pointer;
  border-radius: calc(var(--radius) - 4px);
  transition: background 0.1s, color 0.1s;
}

.download-option:hover {
  background: var(--btn-hover-bg);
  color: var(--text);
}

.download-option.active {
  font-weight: 500;
  color: var(--accent);
}

.platform {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--sub);
  opacity: 0.5;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ---- Works with ---- */

.works-with {
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  padding: 48px 24px 80px;
  text-align: center;
}

.works-with-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--sub);
  opacity: 0.4;
}

.agent-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  margin-top: 24px;
}

.agent-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--sub);
  opacity: 0.4;
  transition: opacity 0.2s ease;
}

.agent-logo:hover {
  opacity: 0.7;
}

.agent-logo svg {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  display: block;
  overflow: visible;
}

.agent-logo span {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
}

@media (max-width: 640px) {
  .agent-logos {
    gap: 32px;
  }

  .agent-logo svg {
    width: 28px;
    height: 28px;
  }
}

/* ---- Section: Isometric Layers ---- */

.iso-section {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 80px 24px 96px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.iso-heading {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--sub);
  margin-bottom: 64px;
  text-align: center;
}

.iso-scene {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.iso-stack {
  perspective: 1200px;
  width: 520px;
  height: 345px;
  position: relative;
  transform-style: preserve-3d;
}

.iso-layer {
  position: absolute;
  width: 420px;
  left: 50%;
  top: 130px;
  transform-style: preserve-3d;
}

.iso-layer-1 {
  transform: translateX(-50%) rotateX(55deg) rotateZ(-30deg) translateZ(80px);
  animation: iso-float-1 0.8s ease-out both, iso-hover 6s ease-in-out 1s infinite;
  z-index: 3;
}

.iso-layer-2 {
  transform: translateX(-50%) rotateX(55deg) rotateZ(-30deg) translateZ(0px);
  animation: iso-float-2 0.8s ease-out 0.15s both, iso-hover 6s ease-in-out 1.5s infinite;
  z-index: 2;
}

.iso-layer-3 {
  transform: translateX(-50%) rotateX(55deg) rotateZ(-30deg) translateZ(-80px);
  animation: iso-float-3 0.8s ease-out 0.3s both, iso-hover 6s ease-in-out 2s infinite;
  z-index: 1;
}

@keyframes iso-float-1 {
  from { opacity: 0; transform: translateX(-50%) rotateX(55deg) rotateZ(-30deg) translateZ(140px); }
  to   { opacity: 1; transform: translateX(-50%) rotateX(55deg) rotateZ(-30deg) translateZ(80px); }
}

@keyframes iso-float-2 {
  from { opacity: 0; transform: translateX(-50%) rotateX(55deg) rotateZ(-30deg) translateZ(60px); }
  to   { opacity: 1; transform: translateX(-50%) rotateX(55deg) rotateZ(-30deg) translateZ(0px); }
}

@keyframes iso-float-3 {
  from { opacity: 0; transform: translateX(-50%) rotateX(55deg) rotateZ(-30deg) translateZ(-20px); }
  to   { opacity: 1; transform: translateX(-50%) rotateX(55deg) rotateZ(-30deg) translateZ(-80px); }
}

@keyframes iso-hover {
  0%, 100% { translate: 0 0 0; }
  50%      { translate: 0 0 6px; }
}

/* Card base */
.iso-card {
  border-radius: 10px;
  overflow: hidden;
  font-family: var(--font-mono);
  box-shadow:
    0 4px 30px rgba(0, 0, 0, 0.5),
    0 1px 0 rgba(255, 255, 255, 0.05) inset;
}

.iso-card-chrome {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 6px 10px;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.iso-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.iso-dot.r { background: #ff5f57; }
.iso-dot.y { background: #febc2e; }
.iso-dot.g { background: #28c840; }

.iso-chrome-url {
  font-size: 8px;
  color: rgba(255, 255, 255, 0.25);
  margin-left: 6px;
  letter-spacing: 0.03em;
}

.iso-label-tag {
  position: absolute;
  top: 6px;
  right: 10px;
  font-size: 7px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.3;
}

/* Browser layer */
.iso-browser {
  background: rgb(4, 6, 14);
  color: rgba(0, 238, 255, 0.9);
  position: relative;
}

.iso-browser::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(0, 200, 255, 0.06), transparent 60%);
  pointer-events: none;
}

.iso-browser-body {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 18px 8px;
  position: relative;
}

.iso-jv-ring {
  width: 64px;
  height: 64px;
  position: relative;
  flex-shrink: 0;
}

.iso-jv-svg {
  width: 100%;
  height: 100%;
}

.iso-jv-arc1,
.iso-jv-arc2,
.iso-jv-arc3 {
  fill: none;
  stroke-linecap: round;
  transform-origin: center;
}

.iso-jv-arc1 {
  stroke: rgba(0, 238, 255, 0.15);
  stroke-width: 1.5;
  stroke-dasharray: 60 120;
  animation: jv-spin 10s linear infinite;
}

.iso-jv-arc2 {
  stroke: rgba(0, 238, 255, 0.3);
  stroke-width: 2;
  stroke-dasharray: 30 100;
  animation: jv-spin 7s linear infinite reverse;
}

.iso-jv-arc3 {
  stroke: rgba(0, 238, 255, 0.5);
  stroke-width: 2;
  stroke-dasharray: 50 80;
  animation: jv-spin 5s linear infinite;
  filter: drop-shadow(0 0 4px rgba(0, 238, 255, 0.3));
}

.iso-jv-core {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: rgba(0, 238, 255, 0.9);
  text-shadow: 0 0 8px rgba(0, 200, 255, 0.5);
}

.iso-jv-side {
  display: flex;
  gap: 14px;
}

.iso-jv-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
}

.iso-jv-num {
  font-size: 18px;
  font-weight: 700;
  color: rgba(0, 238, 255, 0.85);
  text-shadow: 0 0 6px rgba(0, 200, 255, 0.3);
  line-height: 1;
}

.iso-jv-label {
  font-size: 6px;
  letter-spacing: 0.15em;
  color: rgba(0, 238, 255, 0.3);
}

.iso-browser-wave {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 2px;
  height: 22px;
  padding: 0 18px 10px;
}

.iso-wave-bar {
  width: 3px;
  background: linear-gradient(180deg, rgba(0, 238, 255, 0.7), rgba(0, 238, 255, 0.1));
  border-radius: 1px;
  animation: jv-wave-move 1.8s ease-in-out infinite alternate;
  transform-origin: bottom;
}

.iso-wave-bar:nth-child(odd) { animation-delay: -0.4s; }
.iso-wave-bar:nth-child(3n)  { animation-delay: -0.9s; }
.iso-wave-bar:nth-child(5n)  { animation-delay: -1.3s; }

/* Terminal layer */
.iso-terminal {
  background: rgb(10, 10, 14);
  color: var(--text);
  position: relative;
}

.iso-term-body {
  padding: 10px 14px;
}

.iso-tl {
  font-size: 10px;
  line-height: 1.7;
  white-space: pre;
  animation: iso-line-in 0.4s ease-out both;
}

.iso-tl:nth-child(1) { animation-delay: 0.6s; }
.iso-tl:nth-child(2) { animation-delay: 0.8s; }
.iso-tl:nth-child(3) { animation-delay: 1.2s; }
.iso-tl:nth-child(4) { animation-delay: 1.5s; }
.iso-tl:nth-child(5) { animation-delay: 1.8s; }
.iso-tl:nth-child(6) { animation-delay: 2.0s; }
.iso-tl:nth-child(7) { animation-delay: 2.4s; }

.iso-t-dim    { color: var(--sub); opacity: 0.5; }
.iso-t-green  { color: var(--accent); }
.iso-t-yellow { color: #D9A514; }

@keyframes iso-line-in {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Editor layer */
.iso-editor {
  background: rgb(10, 10, 14);
  color: var(--text);
  position: relative;
}

.iso-editor-body {
  padding: 8px 0;
}

.iso-cl {
  padding: 0 14px;
  font-size: 10px;
  line-height: 1.8;
  white-space: pre;
  animation: iso-code-in 0.35s ease-out both;
}

.iso-cl:nth-child(1) { animation-delay: 1.0s; }
.iso-cl:nth-child(2) { animation-delay: 1.1s; }
.iso-cl:nth-child(3) { animation-delay: 1.2s; }
.iso-cl:nth-child(4) { animation-delay: 1.3s; }
.iso-cl:nth-child(5) { animation-delay: 1.4s; }
.iso-cl:nth-child(6) { animation-delay: 1.5s; }
.iso-cl:nth-child(7) { animation-delay: 1.6s; }

.iso-ln {
  display: inline-block;
  width: 18px;
  text-align: right;
  margin-right: 10px;
  color: var(--sub);
  opacity: 0.2;
}

.iso-kw  { color: #c678dd; }
.iso-str { color: #98c379; }
.iso-fn  { color: #61afef; }

@keyframes iso-code-in {
  from { opacity: 0; transform: translateX(-6px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes jv-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes jv-wave-move {
  0% { transform: scaleY(1); }
  50% { transform: scaleY(0.3); }
  100% { transform: scaleY(0.8); }
}

/* Text row below */
.iso-text {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  width: 100%;
  max-width: 720px;
  margin-top: 48px;
}

.iso-text-item {
  text-align: center;
}

.iso-text-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 8px;
}

.iso-text-body {
  font-size: 13px;
  color: var(--sub);
  line-height: 1.6;
}

@media (max-width: 720px) {
  .iso-stack {
    width: 340px;
    height: 240px;
  }

  .iso-layer {
    width: 280px;
  }

  .iso-text {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-top: 32px;
  }
}

/* Footer */

footer {
  width: 100%;
  text-align: center;
  padding: 56px 24px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--sub);
  opacity: 0.3;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.15);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) body {
    -webkit-font-smoothing: auto;
  }

  :root:not([data-theme="dark"]) .download-dropdown {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  }

  :root:not([data-theme="dark"]) ::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.1);
  }

  :root:not([data-theme="dark"]) ::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.18);
  }
}

:root[data-theme="light"] body {
  -webkit-font-smoothing: auto;
}

:root[data-theme="light"] .download-dropdown {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

:root[data-theme="light"] ::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.1);
}

:root[data-theme="light"] ::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 0, 0, 0.18);
}

/* ---- Theme Toggle ---- */

.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 4px;
  border-radius: 9999px;
  border: 1px solid var(--border);
  background: var(--bg-card);
}

.theme-toggle button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 9999px;
  background: transparent;
  color: var(--sub);
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
}

.theme-toggle button:hover {
  color: var(--text);
  background: var(--btn-hover-bg);
}

.theme-toggle button.active {
  color: var(--text);
  background: var(--btn-hover-bg);
}

.theme-toggle button svg {
  width: 16px;
  height: 16px;
}