:root {
  --bg: #07060E;
  --surface: #0D0C18;
  --panel: rgba(16, 14, 30, 0.88);
  --panel-strong: rgba(20, 18, 38, 0.96);
  --border: rgba(139, 92, 246, 0.09);
  --border-hover: rgba(139, 92, 246, 0.22);
  --t1: #EBE8F2;
  --t2: #8E87A0;
  --accent: #B8256F;
  --accent-bright: #D94090;
  --purple: #8B5CF6;
  --green: #22C55E;
  --amber: #E5A820;
  --font-display: "Space Grotesk", sans-serif;
  --font-body: "IBM Plex Sans", sans-serif;
  --font-mono: "JetBrains Mono", monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(139, 92, 246, 0.08), transparent 28%),
    radial-gradient(circle at top right, rgba(217, 64, 144, 0.08), transparent 22%),
    #07060E;
  color: var(--t1);
  font-family: var(--font-body);
}


.docs-page {
  position: relative;
  z-index: 1;
  max-width: 1320px;
  margin: 0 auto;
  padding: 32px 28px 48px;
}

.docs-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.docs-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--t1);
  text-decoration: none;
}

.docs-brand span {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.docs-back {
  color: var(--t2);
  text-decoration: none;
  font-size: 0.88rem;
}

.docs-shell {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 20px;
}

.docs-sidebar,
.docs-main {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  backdrop-filter: blur(14px);
}

.docs-sidebar {
  padding: 22px;
  position: sticky;
  top: 24px;
  align-self: start;
}

.sidebar-kicker {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent-bright);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sidebar-title {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-size: 1.5rem;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.sidebar-copy {
  margin: 0 0 20px;
  color: var(--t2);
  font-size: 0.88rem;
  line-height: 1.7;
}

.folder-list {
  display: grid;
  gap: 10px;
}

.folder-link {
  display: block;
  padding: 13px 14px;
  border-radius: 12px;
  text-decoration: none;
  color: var(--t2);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid transparent;
  transition: border-color 0.2s, transform 0.2s, color 0.2s;
}

.folder-link strong {
  display: block;
  margin-bottom: 4px;
  color: var(--t1);
  font-size: 0.93rem;
}

.folder-link span {
  font-size: 0.77rem;
  line-height: 1.5;
}

.folder-link:hover,
.folder-link.is-active {
  border-color: var(--border-hover);
  color: var(--t1);
  transform: translateY(-1px);
}

.docs-main {
  padding: 24px;
}

.hero-panel {
  padding: 26px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background:
    radial-gradient(circle at top right, rgba(217, 64, 144, 0.12), transparent 25%),
    linear-gradient(145deg, rgba(17, 16, 32, 0.98), rgba(10, 9, 22, 0.96));
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(217, 64, 144, 0.1);
  color: var(--accent-bright);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-panel h1 {
  margin: 14px 0 10px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.9rem);
  line-height: 0.96;
  letter-spacing: -0.05em;
}

.hero-panel p {
  margin: 0;
  max-width: 760px;
  color: var(--t2);
  font-size: 0.95rem;
  line-height: 1.7;
}

.workspace {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 18px;
  margin-top: 18px;
}

.panel {
  padding: 20px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--panel-strong);
}

.panel h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.06rem;
}

.panel p {
  margin: 0 0 16px;
  color: var(--t2);
  font-size: 0.86rem;
  line-height: 1.65;
}

.upload-label {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 120px;
  padding: 18px;
  border-radius: 14px;
  border: 1px dashed rgba(139, 92, 246, 0.28);
  background: rgba(255, 255, 255, 0.02);
  text-align: center;
  color: var(--t1);
  font-weight: 500;
  cursor: pointer;
}

.upload-label span {
  display: block;
  color: var(--t2);
  font-weight: 400;
  font-size: 0.8rem;
  margin-top: 8px;
}

.upload-input {
  display: none;
}

.file-meta {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.025);
  color: var(--t2);
  font-size: 0.8rem;
  line-height: 1.6;
}

.file-meta strong {
  color: var(--t1);
}

.support-note {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  color: var(--t2);
  font-size: 0.8rem;
  line-height: 1.6;
}

.viewer-shell {
  min-height: 620px;
}

.doc-article {
  color: var(--t1);
}

.doc-article h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 1.18rem;
  letter-spacing: -0.03em;
}

.doc-article h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 0.98rem;
  letter-spacing: -0.02em;
}

.doc-article p {
  margin: 0 0 14px;
  color: var(--t2);
  font-size: 0.9rem;
  line-height: 1.72;
}

.doc-article strong {
  color: var(--t1);
}

.doc-section + .doc-section {
  margin-top: 22px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
}

.doc-list,
.doc-steps {
  margin: 0;
  padding-left: 18px;
  color: var(--t2);
}

.doc-list li,
.doc-steps li {
  margin-bottom: 10px;
  line-height: 1.7;
}

.doc-list li::marker,
.doc-steps li::marker {
  color: var(--accent-bright);
}

.doc-callout {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
}

.doc-callout strong {
  display: block;
  margin-bottom: 6px;
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.doc-mini {
  padding: 14px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid rgba(255, 255, 255, 0.03);
}

.doc-mini strong {
  display: block;
  margin-bottom: 6px;
}

.doc-mini span {
  color: var(--t2);
  font-size: 0.84rem;
  line-height: 1.6;
}

.viewer-placeholder {
  min-height: 560px;
  border-radius: 14px;
  border: 1px dashed rgba(139, 92, 246, 0.22);
  display: grid;
  place-items: center;
  text-align: center;
  color: var(--t2);
  padding: 24px;
  background: rgba(255, 255, 255, 0.02);
}

.viewer-placeholder strong {
  display: block;
  color: var(--t1);
  font-size: 1rem;
  margin-bottom: 8px;
}

.doc-frame,
.image-preview,
.text-preview {
  width: 100%;
  min-height: 560px;
  border: 0;
  border-radius: 14px;
  background: #fff;
}

.image-preview {
  object-fit: contain;
  background: rgba(255, 255, 255, 0.02);
}

.text-preview {
  padding: 20px;
  white-space: pre-wrap;
  overflow: auto;
  color: #16141f;
  font: 0.9rem/1.7 "IBM Plex Sans", sans-serif;
}

@media (max-width: 980px) {
  .docs-shell,
  .workspace {
    grid-template-columns: 1fr;
  }

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

  .docs-sidebar {
    position: static;
  }
}

@media (max-width: 640px) {
  .docs-page {
    padding: 20px 16px 36px;
  }

  .docs-topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .docs-main,
  .docs-sidebar,
  .hero-panel,
  .panel {
    padding: 18px;
  }
}