:root {
  color-scheme: dark;
  --bg: #070b17;
  --bg-soft: #101727;
  --panel: rgba(17, 25, 43, .88);
  --panel-solid: #11192b;
  --stroke: rgba(255, 255, 255, .14);
  --stroke-strong: rgba(255, 255, 255, .24);
  --text: rgba(255, 255, 255, .96);
  --muted: rgba(255, 255, 255, .62);
  --accent: #6ae4ff;
  --accent-2: #8dffc4;
  --danger: #ff6572;
  --radius: 20px;
  --shadow: 0 18px 60px rgba(0, 0, 0, .48);
  font-family: Inter, ui-rounded, "SF Pro Rounded", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html, body { width: 100%; min-height: 100%; margin: 0; }
body {
  color: var(--text);
  background:
    radial-gradient(1000px 700px at 10% -10%, #1a2b5e 0, transparent 58%),
    radial-gradient(900px 680px at 105% 5%, #123c3b 0, transparent 55%),
    linear-gradient(155deg, var(--bg), var(--bg-soft));
}
button, input, textarea, select { font: inherit; }
button, a, label { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.eyebrow {
  color: var(--accent);
  font-size: .7rem;
  font-weight: 850;
  letter-spacing: .18em;
}

/* Cover */
.cover-page { min-height: 100svh; overflow: hidden; }
.cover {
  position: relative;
  isolation: isolate;
  min-height: 100svh;
  display: grid;
  grid-template-rows: 1fr auto 1fr;
  align-items: center;
  padding: max(34px, env(safe-area-inset-top)) max(26px, env(safe-area-inset-right)) max(24px, env(safe-area-inset-bottom)) max(26px, env(safe-area-inset-left));
  overflow: hidden;
}
.cover::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -3;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, transparent, #000 20%, #000 80%, transparent);
}
.cover-glow { position: absolute; z-index: -2; width: 62vw; height: 62vw; border-radius: 50%; filter: blur(80px); opacity: .2; }
.cover-glow-left { left: -30vw; top: 18%; background: #3a76ff; }
.cover-glow-right { right: -30vw; bottom: 5%; background: #3effae; }
.cover-heading { align-self: end; text-align: center; margin-bottom: clamp(34px, 7vh, 76px); }
.cover-heading h1 { margin: 6px 0 4px; font-size: clamp(4rem, 10vw, 8rem); line-height: .9; letter-spacing: -.065em; text-shadow: 0 20px 60px rgba(0,0,0,.5); }
.cover-heading p { margin: 16px auto 0; color: var(--muted); font-size: clamp(1rem, 2vw, 1.3rem); }
.cover-actions { width: min(980px, 100%); margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.cover-choice {
  position: relative;
  min-height: 180px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 22px;
  padding: 28px;
  border: 1px solid var(--stroke-strong);
  border-radius: 28px;
  background: linear-gradient(145deg, rgba(255,255,255,.11), rgba(255,255,255,.035));
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}
.cover-choice.build { --choice: var(--accent); }
.cover-choice.present { --choice: var(--accent-2); }
.cover-choice:hover, .cover-choice:focus-visible { transform: translateY(-5px); border-color: color-mix(in srgb, var(--choice), transparent 30%); background: linear-gradient(145deg, color-mix(in srgb, var(--choice), transparent 84%), rgba(255,255,255,.05)); outline: none; }
.choice-icon { width: 62px; height: 62px; border-radius: 19px; display: grid; place-items: center; font-size: 1.6rem; color: #071018; background: var(--choice); box-shadow: 0 0 35px color-mix(in srgb, var(--choice), transparent 55%); }
.choice-copy { display: flex; flex-direction: column; gap: 6px; }
.choice-copy strong { font-size: clamp(1.7rem, 3.4vw, 2.5rem); letter-spacing: -.04em; }
.choice-copy small { color: var(--muted); font-size: .94rem; line-height: 1.35; }
.choice-arrow { color: var(--choice); font-size: 2rem; }
.cover-foot { align-self: end; justify-self: center; color: var(--muted); font-size: .78rem; text-align: center; margin: 32px 0 0; }

/* Reusable controls */
.button, .icon-button, .mode-button {
  appearance: none;
  border: 1px solid var(--stroke);
  color: var(--text);
  background: rgba(255,255,255,.065);
  cursor: pointer;
  user-select: none;
  touch-action: manipulation;
  transition: background .14s, border-color .14s, transform .06s;
}
.button { min-height: 39px; display: inline-flex; align-items: center; justify-content: center; gap: 7px; padding: 8px 12px; border-radius: 12px; font-size: .78rem; font-weight: 760; }
.button.small { min-height: 34px; padding: 6px 10px; font-size: .72rem; }
.button.primary { border-color: rgba(106,228,255,.48); background: rgba(106,228,255,.14); }
.button.danger { border-color: rgba(255,101,114,.45); color: #ffc4ca; background: rgba(255,101,114,.1); }
.button:hover, .icon-button:hover, .mode-button:hover { background: rgba(255,255,255,.14); }
.button:active, .icon-button:active, .mode-button:active { transform: scale(.97); }
.button:focus-visible, .icon-button:focus-visible, .mode-button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.icon-button { width: 36px; height: 36px; flex: 0 0 auto; display: grid; place-items: center; padding: 0; border-radius: 11px; font-size: 1.05rem; }
.button-row { display: flex; flex-wrap: wrap; gap: 7px; align-items: center; }

/* Editor shell */
.app-page { height: 100svh; overflow: hidden; }
.app-shell { height: 100svh; display: grid; grid-template-columns: 330px minmax(0, 1fr); gap: 12px; padding: max(10px, env(safe-area-inset-top)) max(10px, env(safe-area-inset-right)) max(10px, env(safe-area-inset-bottom)) max(10px, env(safe-area-inset-left)); }
.app-shell.sidebar-collapsed { grid-template-columns: 0 minmax(0,1fr); }
.sidebar, .workspace, .presentation-shell {
  border: 1px solid var(--stroke);
  background: linear-gradient(180deg, rgba(255,255,255,.065), rgba(255,255,255,.025));
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.sidebar { min-width: 0; display: flex; flex-direction: column; overflow: hidden; border-radius: var(--radius); transition: opacity .2s, transform .2s; }
.sidebar-collapsed .sidebar { opacity: 0; transform: translateX(-14px); pointer-events: none; }
.panel-header, .workspace-toolbar, .presentation-toolbar { min-height: 58px; display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 9px 11px; border-bottom: 1px solid var(--stroke); background: rgba(0,0,0,.23); }
.brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 880; letter-spacing: -.015em; }
.brand small { color: var(--muted); font-size: .66rem; letter-spacing: .02em; font-weight: 650; }
.brand-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(106,228,255,.12), 0 0 18px rgba(106,228,255,.58); }
.save-status { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: .68rem; }
.save-status span { width: 7px; height: 7px; border-radius: 50%; background: #9da5b5; }
.save-status.saving span { background: #ffd36a; animation: pulse 1s infinite; }
.save-status.saved span { background: var(--accent-2); }
.save-status.error span { background: var(--danger); }
.sidebar-close { display: none; }
@keyframes pulse { 50% { opacity: .35; } }
.panel-section { padding: 12px; border-bottom: 1px solid var(--stroke); }
.panel-section.compact { padding-top: 10px; padding-bottom: 10px; }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; margin-bottom: 9px; }
.section-heading h2 { margin: 0; font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; }
.section-heading span { color: var(--muted); font-size: .66rem; }
.button-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; }
.sources-heading { padding: 12px 12px 0; }
.sources-list { flex: 1; min-height: 0; overflow: auto; padding: 0 10px 12px; overscroll-behavior: contain; }
.empty-sources { margin: 18px 5px; padding: 20px 14px; border: 1px dashed var(--stroke); border-radius: 15px; color: var(--muted); text-align: center; font-size: .75rem; line-height: 1.5; }
.source-item { display: grid; grid-template-columns: 48px minmax(0,1fr); gap: 9px; margin-bottom: 8px; padding: 8px; border: 1px solid var(--stroke); border-radius: 15px; background: rgba(0,0,0,.23); }
.source-thumb { width: 48px; height: 48px; display: grid; place-items: center; overflow: hidden; border: 1px solid var(--stroke); border-radius: 12px; background: rgba(0,0,0,.35); color: var(--accent); font-size: 1.1rem; font-weight: 850; }
.source-thumb img { width: 100%; height: 100%; object-fit: cover; }
.source-meta { min-width: 0; display: grid; gap: 4px; }
.source-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: .76rem; font-weight: 790; }
.source-type { color: var(--muted); font-size: .65rem; }
.source-actions { display: flex; flex-wrap: wrap; gap: 5px; }
.source-actions .button { min-height: 28px; padding: 4px 8px; font-size: .63rem; }

.workspace { min-width: 0; display: flex; flex-direction: column; overflow: hidden; border-radius: var(--radius); }
.workspace-toolbar { flex-wrap: wrap; }
.toolbar-group { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.segmented { display: flex; padding: 3px; gap: 2px; border: 1px solid var(--stroke); border-radius: 13px; background: rgba(0,0,0,.2); }
.mode-button { min-height: 30px; padding: 5px 9px; border-color: transparent; border-radius: 9px; font-size: .68rem; font-weight: 760; }
.mode-button.active { border-color: rgba(106,228,255,.45); color: #c9f8ff; background: rgba(106,228,255,.15); }
.color-control { height: 34px; display: flex; align-items: center; gap: 6px; padding: 4px 7px; border: 1px solid var(--stroke); border-radius: 11px; color: var(--muted); font-size: .65rem; }
.color-control input { width: 27px; height: 22px; padding: 0; border: 0; background: none; }
.zoom-label { min-width: 46px; color: var(--muted); font-size: .68rem; font-weight: 750; text-align: center; }
.mode-hint { min-height: 32px; display: flex; align-items: center; padding: 6px 12px; border-bottom: 1px solid var(--stroke); color: var(--muted); background: rgba(0,0,0,.18); font-size: .69rem; }
.desk-viewport { position: relative; flex: 1; min-height: 0; overflow: hidden; touch-action: none; cursor: default; background: rgba(0,0,0,.08); }
.desk-viewport.pan-cursor { cursor: grab; }
.desk-viewport.pan-cursor:active { cursor: grabbing; }
.desk-content { position: absolute; left: 0; top: 0; width: 8000px; height: 8000px; transform-origin: 0 0; will-change: transform; }
.grid-layer { position: absolute; inset: 0; pointer-events: none; opacity: .32; background-image: linear-gradient(to right, rgba(255,255,255,.06) 1px, transparent 1px), linear-gradient(to bottom, rgba(255,255,255,.06) 1px, transparent 1px); background-size: 80px 80px; }
.grid-layer::after { content: ""; position: absolute; inset: 0; opacity: .2; background-image: linear-gradient(to right, rgba(255,255,255,.08) 1px, transparent 1px), linear-gradient(to bottom, rgba(255,255,255,.08) 1px, transparent 1px); background-size: 16px 16px; }
.connector-layer { position: absolute; inset: 0; width: 8000px; height: 8000px; overflow: visible; pointer-events: none; }
.connector-hit { pointer-events: stroke; cursor: pointer; }

.desk-card { position: absolute; min-width: 180px; min-height: 120px; overflow: hidden; border: 1px solid var(--stroke-strong); border-radius: 17px; background: linear-gradient(180deg, rgba(9,14,25,.96), rgba(9,14,25,.84)); box-shadow: 0 16px 45px rgba(0,0,0,.52); touch-action: none; user-select: none; }
.desk-card.selected { border-color: rgba(106,228,255,.85); box-shadow: 0 16px 50px rgba(0,0,0,.64), 0 0 0 3px rgba(106,228,255,.16); }
.card-header { height: 36px; display: flex; align-items: center; justify-content: space-between; gap: 7px; padding: 6px 7px; border-bottom: 1px solid var(--stroke); background: rgba(0,0,0,.25); cursor: grab; }
.card-title-wrap { min-width: 0; display: flex; align-items: center; gap: 6px; }
.card-badge { flex: 0 0 auto; padding: 3px 6px; border: 1px solid var(--stroke); border-radius: 99px; color: var(--accent); font-size: .56rem; font-weight: 850; text-transform: uppercase; }
.card-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: .69rem; font-weight: 800; }
.card-controls { display: flex; gap: 4px; }
.card-control { width: 23px; height: 23px; padding: 0; display: grid; place-items: center; border: 1px solid var(--stroke); border-radius: 7px; color: var(--text); background: rgba(255,255,255,.07); font-size: .7rem; cursor: pointer; }
.card-body { height: calc(100% - 36px); padding: 7px; }
.card-preview { width: 100%; height: 100%; display: grid; place-items: center; overflow: hidden; border: 1px solid rgba(255,255,255,.1); border-radius: 12px; background: rgba(0,0,0,.36); color: var(--muted); font-size: .75rem; line-height: 1.4; text-align: center; }
.card-preview img { width: 100%; height: 100%; object-fit: cover; display: block; }
.card-preview .snippet { width: 100%; height: 100%; overflow: hidden; padding: 10px; color: rgba(255,255,255,.78); white-space: pre-wrap; text-align: left; font-size: .7rem; }
.resize-handle { position: absolute; right: 6px; bottom: 6px; width: 17px; height: 17px; border: 1px solid rgba(255,255,255,.32); border-radius: 6px; background: rgba(255,255,255,.2); cursor: nwse-resize; }
.empty-desk { position: absolute; inset: 0; display: grid; place-content: center; justify-items: center; gap: 7px; pointer-events: none; color: var(--muted); text-align: center; }
.empty-desk[hidden] { display: none; }
.empty-desk span { width: 54px; height: 54px; display: grid; place-items: center; margin-bottom: 4px; border: 1px solid var(--stroke); border-radius: 18px; color: var(--accent); background: rgba(255,255,255,.05); font-size: 1.5rem; }
.empty-desk strong { color: rgba(255,255,255,.82); font-size: .95rem; }
.empty-desk small { max-width: 300px; font-size: .72rem; }
.toast { position: absolute; left: 12px; bottom: 12px; z-index: 50; max-width: min(420px, calc(100% - 24px)); padding: 9px 11px; border: 1px solid var(--stroke); border-radius: 12px; color: rgba(255,255,255,.9); background: rgba(2,5,11,.84); box-shadow: 0 10px 34px rgba(0,0,0,.34); backdrop-filter: blur(10px); font-size: .7rem; opacity: 0; transform: translateY(8px); pointer-events: none; transition: opacity .18s, transform .18s; }
.toast.show { opacity: 1; transform: translateY(0); }

/* Dialogs */
dialog { color: var(--text); }
.dialog, .viewer-dialog { width: min(620px, calc(100% - 28px)); max-height: calc(100svh - 28px); padding: 0; border: 1px solid var(--stroke-strong); border-radius: 22px; background: var(--panel-solid); box-shadow: 0 30px 100px rgba(0,0,0,.75); }
.viewer-dialog { width: min(1120px, calc(100% - 24px)); height: min(820px, calc(100svh - 24px)); }
.dialog::backdrop, .viewer-dialog::backdrop { background: rgba(0,0,0,.72); backdrop-filter: blur(5px); }
.dialog form { padding: 0; }
.dialog header, .viewer-shell header { min-height: 62px; display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 11px 13px; border-bottom: 1px solid var(--stroke); }
.dialog h2, .viewer-shell h2 { margin: 2px 0 0; font-size: 1rem; }
.dialog label { display: grid; gap: 6px; margin: 14px; color: var(--muted); font-size: .72rem; font-weight: 700; }
.dialog input, .dialog textarea, .dialog select { width: 100%; padding: 10px 11px; border: 1px solid var(--stroke); border-radius: 12px; color: var(--text); background: rgba(0,0,0,.25); resize: vertical; }
.dialog footer { display: flex; justify-content: flex-end; gap: 8px; padding: 12px 14px 14px; }
.viewer-shell { height: 100%; min-height: 0; display: flex; flex-direction: column; }
.viewer { flex: 1; min-height: 0; overflow: auto; background: #05070c; }
.viewer iframe, .viewer video, .viewer embed { width: 100%; height: 100%; min-height: 520px; display: block; border: 0; }
.viewer img { display: block; max-width: 100%; min-height: 100%; margin: 0 auto; object-fit: contain; }
.viewer-text { max-width: 850px; margin: 0 auto; padding: clamp(24px, 5vw, 64px); color: rgba(255,255,255,.88); font-family: Charter, Georgia, serif; font-size: clamp(1rem, 2vw, 1.22rem); line-height: 1.75; white-space: pre-wrap; }
.viewer-message { display: grid; min-height: 100%; place-content: center; gap: 9px; padding: 30px; color: var(--muted); text-align: center; }

/* Presentation */
.presentation-shell { height: 100svh; display: flex; flex-direction: column; overflow: hidden; }
.presentation-toolbar { flex: 0 0 auto; padding-left: max(12px, env(safe-area-inset-left)); padding-right: max(12px, env(safe-area-inset-right)); }
.presentation-page .desk-card { cursor: pointer; }
.presentation-page .card-header { cursor: pointer; }

@media (max-width: 900px) {
  .app-shell { grid-template-columns: min(330px, calc(100vw - 42px)) minmax(0,1fr); gap: 8px; }
  .app-shell:not(.sidebar-collapsed) .sidebar { position: absolute; z-index: 80; top: max(8px, env(safe-area-inset-top)); bottom: max(8px, env(safe-area-inset-bottom)); left: max(8px, env(safe-area-inset-left)); width: min(330px, calc(100vw - 42px)); }
  .app-shell:not(.sidebar-collapsed)::after { content: ""; position: fixed; inset: 0; z-index: 70; background: rgba(0,0,0,.46); }
  .app-shell, .app-shell.sidebar-collapsed { grid-template-columns: 1fr; }
  .sidebar-collapsed .sidebar { display: none; }
  .workspace { grid-column: 1; }
  .sidebar-close { display: grid; }
  .workspace-toolbar { align-items: flex-start; }
  .view-tools { margin-left: 42px; }
}

@media (max-width: 660px) {
  .cover-actions { grid-template-columns: 1fr; }
  .cover-choice { min-height: 130px; padding: 20px; }
  .cover-heading { margin-bottom: 28px; }
  .cover { grid-template-rows: auto 1fr auto; }
  .presentation-toolbar { align-items: flex-start; flex-direction: column; }
  .presentation-toolbar .toolbar-group { width: 100%; }
  .mode-hint { display: none; }
  .workspace-toolbar { padding: 7px; }
  .segmented { overflow-x: auto; max-width: calc(100vw - 62px); }
  .mode-button { padding-inline: 7px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}