:root {
  --stock: #eceee6;
  --paper: #fffef9;
  --ink: #121510;
  --muted: #656a60;
  --line: #cbd0c4;
  --acid: #dff56a;
  --coral: #ff5b3d;
  --blue: #2945f5;
  --key: #f2dc55;
  --evidence: #9fe0c3;
  --question: #c9b7f4;
  --action: #ffad98;
  --ui: "Archivo", "Arial Narrow", sans-serif;
  --reading: "Literata", Georgia, serif;
  --utility: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; }

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgb(18 21 16 / 4%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(18 21 16 / 3%) 1px, transparent 1px),
    var(--stock);
  background-size: 48px 48px;
  font-family: var(--ui);
}

a { color: inherit; }
button, input { font: inherit; }
button { cursor: pointer; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid var(--coral); outline-offset: 3px; }
kbd { font-family: var(--utility); font-size: .78em; }

.notebook-topbar {
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 0 24px;
  color: var(--paper);
  background: #0d100c;
  border-bottom: 3px solid var(--coral);
}

.notebook-brand, .notebook-back {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.notebook-brand i { width: 10px; height: 10px; border-radius: 50%; background: var(--coral); }
.notebook-brand strong { font-size: 20px; font-weight: 900; font-variation-settings: "wdth" 82; letter-spacing: -.04em; }
.notebook-brand span { padding-left: 10px; color: #9ca496; border-left: 1px solid #43483f; font: 9px var(--utility); letter-spacing: .14em; }
.notebook-back { padding: 8px 10px; border: 1px solid #454b41; font: 10px var(--utility); text-transform: uppercase; }
.notebook-back kbd { padding: 2px 5px; color: var(--ink); background: var(--acid); }

.notebook-page { width: min(1120px, calc(100vw - 48px)); margin: 0 auto; padding: 56px 0 100px; }
.notebook-intro { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: 30px; padding-bottom: 30px; border-bottom: 2px solid var(--ink); }
.notebook-intro span { color: var(--blue); font: 10px var(--utility); letter-spacing: .13em; text-transform: uppercase; }
.notebook-intro h1 { max-width: 760px; margin: 9px 0 0; font-size: clamp(48px, 8vw, 92px); font-weight: 900; font-variation-settings: "wdth" 78; letter-spacing: -.065em; line-height: .86; }
.notebook-intro p { margin: 0 0 4px; color: var(--muted); font: 10px/1.6 var(--utility); text-transform: uppercase; }

.notebook-controls { display: grid; grid-template-columns: minmax(260px, 1fr) auto; gap: 14px; margin: 22px 0 34px; }
.notebook-controls label { min-height: 44px; display: flex; align-items: center; gap: 10px; padding: 0 14px; background: var(--paper); border: 1px solid var(--line); }
.notebook-controls svg { width: 19px; fill: none; stroke: var(--muted); stroke-width: 1.7; }
.notebook-controls input { width: 100%; border: 0; outline: 0; background: transparent; }
.notebook-controls div { display: flex; gap: 6px; }
.notebook-controls button { padding: 0 12px; color: var(--muted); background: transparent; border: 1px solid var(--line); font: 9px var(--utility); text-transform: uppercase; }
.notebook-controls button.is-active { color: var(--paper); background: var(--blue); border-color: var(--blue); }

.notebook-list { display: grid; gap: 18px; }
.notebook-card { background: var(--paper); border: 1px solid var(--line); box-shadow: 7px 7px 0 rgb(18 21 16 / 8%); }
.notebook-card > header { padding: 25px 28px 28px; }
.notebook-card-meta, .notebook-mark-meta { display: flex; align-items: center; gap: 8px; color: var(--muted); font: 9px var(--utility); text-transform: uppercase; }
.notebook-card-meta strong { padding: 3px 6px; color: var(--paper); background: var(--blue); }
.notebook-card-meta em, .notebook-mark-meta em { font-style: normal; }
.notebook-card h2 { max-width: 900px; margin: 12px 0 0; font-size: clamp(27px, 4vw, 48px); font-weight: 870; font-variation-settings: "wdth" 84; letter-spacing: -.045em; line-height: .98; }
.notebook-card h2 a { text-decoration: none; }
.notebook-card h2 a:hover { color: var(--blue); }
.notebook-card-links { display: flex; gap: 16px; margin-top: 18px; font: 9px var(--utility); text-transform: uppercase; }
.notebook-card-links button { padding: 0; color: var(--coral); background: transparent; border: 0; font: inherit; text-transform: inherit; text-decoration: underline; }
.notebook-marks { display: grid; border-top: 1px solid var(--line); }
.notebook-mark { --mark: var(--key); padding: 22px 28px 24px; border-left: 7px solid var(--mark); }
.notebook-mark + .notebook-mark { border-top: 1px solid var(--line); }
.notebook-mark.is-evidence { --mark: var(--evidence); }
.notebook-mark.is-question { --mark: var(--question); }
.notebook-mark.is-action { --mark: var(--action); }
.notebook-mark.is-ink { --mark: var(--blue); }
.notebook-mark-meta span { padding: 3px 6px; color: var(--ink); background: var(--mark); }
.notebook-mark-meta strong { color: var(--coral); }
.notebook-mark blockquote { max-width: 900px; margin: 12px 0 0; font: 500 clamp(18px, 2.4vw, 24px)/1.48 var(--reading); }
.notebook-note { max-width: 780px; margin-top: 16px; padding: 13px 15px; background: #f0f1eb; border-left: 3px solid var(--blue); font: 12px/1.65 var(--utility); }
.notebook-note code { padding: .1em .28em; color: #1737c6; background: #e1e5ff; }

.notebook-empty { min-height: 320px; display: grid; place-items: center; align-content: center; gap: 8px; padding: 40px; text-align: center; background: var(--paper); border: 1px solid var(--line); }
.notebook-empty strong { font-size: 38px; font-weight: 850; font-variation-settings: "wdth" 82; letter-spacing: -.04em; }
.notebook-empty p { margin: 0; color: var(--muted); }
.notebook-empty a { margin-top: 12px; padding: 9px 12px; color: var(--paper); background: var(--ink); font: 9px var(--utility); text-transform: uppercase; }

@media (max-width: 720px) {
  .notebook-topbar { min-height: 58px; padding: 0 12px; }
  .notebook-brand span { display: none; }
  .notebook-back { font-size: 0; }
  .notebook-back kbd { font-size: 10px; }
  .notebook-page { width: calc(100vw - 20px); padding: 34px 0 70px; }
  .notebook-intro { grid-template-columns: 1fr; gap: 16px; }
  .notebook-intro h1 { font-size: clamp(47px, 16vw, 70px); }
  .notebook-controls { grid-template-columns: 1fr; }
  .notebook-controls div { overflow-x: auto; }
  .notebook-controls button { min-height: 36px; }
  .notebook-card > header, .notebook-mark { padding-left: 18px; padding-right: 18px; }
}