/* =========================
   TOKENS
========================= */
:root {
  color-scheme: dark;

  /* =================================
  Core Palette
  Change these three first when retheming.

  60:30:10 rule guideline:
  --main1   : the dominant background/base color
  --accent1 : the main accent/surface color
  --accent2 : a sharper accent related to accent1, but pushed away from the background hue for contrast and emphasis
  ================================= */
  --main1: #1e181d;
  --accent1: #6d3434;
  --accent2: #a5acff;

  /* Neutral mix helpers.
  These are intentionally fixed rgba values so they can be reused
  everywhere with color-mix() for lightening and darkening. */
  --dark25: rgba(0, 0, 0, 0.25);
  --dark50: rgba(0, 0, 0, 0.5);
  --light25: rgba(255, 255, 255, 0.25);
  --light50: rgba(255, 255, 255, 0.5);

  /* =================================
  Derived Theme Tokens
  These map the minimal palette to the rest of the UI.
  Most component CSS should keep using these aliases.
  ================================= */
  --color-bg: var(--main1);
  --color-bg-accent: color-mix(in srgb, var(--main1) 70%, var(--light25));
  --color-surface: color-mix(in srgb, var(--main1) 48%, var(--accent1));
  --color-surface-strong: color-mix(in srgb, var(--main1) 24%, var(--accent1));
  --color-surface-soft: color-mix(in srgb, var(--main1) 58%, var(--accent1));
  --color-border: color-mix(in srgb, var(--accent1) 68%, var(--light25));
  --color-border-strong: color-mix(in srgb, var(--accent1) 72%, var(--light50));
  --color-text: color-mix(in srgb, var(--main1) 10%, white);
  --color-text-muted: color-mix(in srgb, var(--color-text) 78%, var(--accent1));
  --color-text-soft: color-mix(in srgb, var(--color-text) 62%, var(--accent1));
  --color-primary: var(--accent1);
  --color-primary-strong: var(--accent2);
  --color-primary-soft: color-mix(in srgb, var(--main1) 42%, var(--accent1));
  --color-highlight: color-mix(in srgb, var(--accent2) 82%, white);
  --color-highlight-soft: color-mix(in srgb, var(--main1) 42%, var(--accent2));
  --color-shadow: transparent;

  /* Optional extra aliases for quick custom experiments.
  These are safe to use if you want a brighter or darker variant
  without introducing new base colors. */
  --main1-raised: color-mix(in srgb, var(--main1) 62%, var(--light25));
  --main1-deep: color-mix(in srgb, var(--main1) 78%, var(--dark50));
  --accent1-soft: color-mix(in srgb, var(--main1) 46%, var(--accent1));
  --accent1-strong: color-mix(in srgb, var(--accent1) 78%, var(--light25));
  --accent2-soft: color-mix(in srgb, var(--main1) 42%, var(--accent2));
  --accent2-strong: color-mix(in srgb, var(--accent2) 82%, var(--light25));

  /* Typography:
  --font-body drives most text in the app.
  --font-display is used for headings.
  --font-accent is used for labels, eyebrow text, and inline code. */
  --font-body: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-display: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-accent: "Consolas", "Lucida Console", monospace;

  /* Corner radii for controls and containers. */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: clamp(8px, 0.4em, 14px);

  /* Border system:
  keep component framing adjustable from tokens rather than per-rule tweaks. */
  --border-width: 2px;
  --border-width-strong: 3px;
  --border-inset-width: 2px;
  --border-inset-offset: 0.28rem;

  /* Core spacing scale:
  small increments first, then larger layout spacing. */
  --space-1: 0.2rem;
  --space-2: 0.3rem;
  --space-3: 0.4rem;
  --space-4: 0.8rem;
  --space-5: 1.0rem;
  --space-6: 1.4rem;

  /* High-level layout sizing.
  These are good first knobs to turn when the app feels cramped or too loose. */
  --shell-padding: var(--space-5);
  --shell-padding-mobile: var(--space-3);
  --shell-padding-compact: var(--space-2);
  --section-gap: var(--space-3);
  --panel-padding: clamp(1.45rem, 1.8vw, 2rem);
  --panel-padding-mobile: 1.15rem;
  --card-padding: clamp(1.15rem, 1.5vw, 1.55rem);
  --card-padding-mobile: 1rem;
  --card-gap: var(--space-4);
  --control-gap: var(--space-2);
  --option-gap: var(--space-3);

  /* Type sizing.
  --text-size sets the root font size through html.
  The rest are reused by headings, helpers, buttons, and inputs. */
  --text-size: clamp(11pt, 0.8rem + 0.8vw, 14pt);
  --text-small: clamp(9pt, 0.4rem + 0.8vw, 11pt);
  --text-title: clamp(18pt, 1.4rem + 0.4vw, 24pt);
  --text-heading: clamp(14pt, 1rem + 0.4vw, 20pt);
  --text-field: clamp(11pt, 0.9rem + 0.2vw, 14pt);
  --button-text-size: clamp(9pt, 0.9rem + 0.18vw, 14pt);
  --button-height: clamp(2.8rem, 2.6rem + 0.6vw, 3.25rem);

  /* Control sizing and padding. */
  --button-padding-y: 0.8rem;
  --button-padding-x: 1.1rem;
  --chip-padding-y: 0.55rem;
  --chip-padding-x: 0.9rem;
  --skip-padding-y: 0.55rem;
  --skip-padding-x: 0.8rem;
  --field-padding-y: 1rem;
  --field-padding-x: 1.1rem;

  /* Content width and field sizing. */
  --app-max-width: 1100px;
  --reading-width: 72rem;
  --field-height: clamp(18rem, 38vh, 32rem);
}

/* =========================
BASE
========================= */
html {
  font-size: var(--text-size);
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  padding:
    env(safe-area-inset-top, 0)
    env(safe-area-inset-right, 0)
    env(safe-area-inset-bottom, 0)
    env(safe-area-inset-left, 0);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0.01em;
}

p {
  margin: 0;
  line-height: 1.55;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
select,
textarea,
input[type="checkbox"],
input[type="radio"],
input[type="range"] {
  -webkit-tap-highlight-color: transparent;
}

code {
  font-family: var(--font-accent);
  font-size: 0.95em;
  color: var(--color-highlight);
}