/*
 * Tasty A.F. - warm editorial
 *
 * The concept is paper on a desk: a cream page, ink-dark serif headings, and the
 * recipe rendered as a physical index card. Deliberately light-only; there is no
 * such thing as dark paper, and a hedged second theme would undercut the metaphor.
 *
 * Layer order is declared once here so nothing ever needs a specificity hack.
 */
@layer reset, tokens, base, components, utilities;

/* ============================================================ reset ===== */
@layer reset {
  *, *::before, *::after { box-sizing: border-box; }

  * { margin: 0; }

  html { -webkit-text-size-adjust: 100%; }

  body {
    min-block-size: 100vh;
    -webkit-font-smoothing: antialiased;
  }

  img, picture, svg { display: block; max-inline-size: 100%; }

  /* Form controls do not inherit type by default */
  input, button, textarea, select { font: inherit; color: inherit; }

  textarea { display: block; }

  form { margin: 0; }

  h1, h2, h3 { text-wrap: balance; }

  p { text-wrap: pretty; }

  /* Needed to beat display:flex on elements we toggle from JS */
  [hidden] { display: none !important; }
}

/* =========================================================== tokens ===== */
@layer tokens {
  :root {
    color-scheme: light;

    /* Surfaces */
    --paper:        #FAF7F0;  /* the desk */
    --paper-raised: #FFFDF8;  /* the card - lighter, so it lifts off the desk */
    --paper-sunk:   #F3EEE4;  /* callouts and insets */

    /* Ink */
    --ink:        #2B2622;
    --ink-strong: #191512;
    --ink-muted:  #6E6459;    /* 5.4:1 on paper - passes AA */
    --ink-faint:  #A2988A;    /* decorative only, never body text */

    /* Rules */
    --rule:        #E3DCCF;
    --rule-strong: #CFC5B4;

    /* Accent. Two values on purpose: the fill fails AA for small text at 4.48:1,
       so anything that IS text uses the darker one at 6.05:1. */
    --accent:       #B5563A;
    --accent-ink:   #9C4227;
    --accent-hover: #8A3A22;
    --accent-wash:  #F6E8E1;

    /* Semantic */
    --ok-rule:   #4F7A43;  --ok-wash:   #EEF2E9;  --ok-ink:   #2F5228;
    --warn-rule: #B5563A;  --warn-wash: #FAEDE8;  --warn-ink: #8A3A22;
    --info-rule: #5B7C8D;  --info-wash: #EAF0F3;  --info-ink: #3C5866;

    /* Type */
    --font-display: "Fraunces", Georgia, "Times New Roman", serif;
    --font-body: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
                 "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "DejaVu Sans Mono",
                 monospace;

    --text-xs:   0.75rem;
    --text-sm:   0.875rem;
    --text-base: 1.0625rem;   /* 17px - editorial reads better above 16 */
    --text-lg:   1.1875rem;
    --text-xl:   1.375rem;
    --text-2xl:  1.75rem;
    --text-3xl:  clamp(2rem, 1.5rem + 2.2vw, 2.875rem);

    --leading-tight: 1.14;
    --leading-snug:  1.3;
    --leading-body:  1.62;
    --tracking-tight: -0.018em;
    --tracking-wide:   0.08em;
    --measure: 68ch;

    /* Space, 4px base */
    --space-1: 0.25rem;  --space-2: 0.5rem;   --space-3: 0.75rem;
    --space-4: 1rem;     --space-5: 1.5rem;   --space-6: 2rem;
    --space-7: 3rem;     --space-8: 4rem;
    --flow: var(--space-4);

    /* Radii - kept tiny. Uniform 4px rounding is the strongest "generic app" tell,
       and a real index card has near-square corners. */
    --radius-sm: 2px;
    --radius-md: 3px;

    /* Shadows tinted with the ink hue. Pure black over cream goes grey-green. */
    --shadow-xs:   0 1px 1px rgb(43 38 34 / .05);
    --shadow-card: 0 1px 2px rgb(43 38 34 / .06), 0 6px 16px -8px rgb(43 38 34 / .14);
    --shadow-lift: 0 2px 4px rgb(43 38 34 / .07), 0 14px 32px -12px rgb(43 38 34 / .20);
    --focus-ring:  0 0 0 3px rgb(181 86 58 / .28);

    --container: 56rem;
    --gutter: var(--space-5);
    --dur: 140ms;
    --ease: cubic-bezier(.2, .6, .3, 1);
  }
}

/* ============================================================= base ===== */
@layer base {
  body {
    background-color: var(--paper);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: var(--leading-body);
  }

  h1, h2, h3 {
    font-family: var(--font-display);
    color: var(--ink-strong);
    font-weight: 600;
    letter-spacing: var(--tracking-tight);
    line-height: var(--leading-snug);
  }

  h1 { font-size: var(--text-3xl); line-height: var(--leading-tight); }
  h2 { font-size: var(--text-2xl); }
  h3 { font-size: var(--text-xl); }

  a {
    color: var(--accent-ink);
    text-decoration-thickness: 1px;
    text-underline-offset: 0.16em;
    text-decoration-color: rgb(156 66 39 / .35);
    transition: color var(--dur) var(--ease),
                text-decoration-color var(--dur) var(--ease);
  }

  a:hover {
    color: var(--accent-hover);
    text-decoration-color: currentColor;
  }

  hr {
    border: 0;
    border-block-start: 1px solid var(--rule);
    margin-block: var(--space-6);
  }

  small { font-size: var(--text-sm); }

  strong { font-weight: 600; color: var(--ink-strong); }

  ul, ol { padding-inline-start: 1.25em; }

  li + li { margin-block-start: var(--space-1); }

  code, kbd, samp { font-family: var(--font-mono); font-size: 0.92em; }

  :focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
  }

  /* ---- form controls ---- */
  label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--ink-strong);
    margin-block-end: var(--space-2);
  }

  input[type="url"],
  input[type="text"],
  input[type="email"],
  input[type="password"],
  textarea {
    inline-size: 100%;
    padding: var(--space-3) var(--space-4);
    background-color: var(--paper-raised);
    border: 1px solid var(--rule-strong);
    border-radius: var(--radius-md);
    color: var(--ink);
    box-shadow: var(--shadow-xs) inset;
    transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  }

  input::placeholder, textarea::placeholder { color: var(--ink-faint); }

  input:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: var(--focus-ring);
  }

  input + label, textarea + label, .meta + label { margin-block-start: var(--space-5); }

  input + .meta, textarea + .meta { margin-block-start: var(--space-2); }
}

/* ======================================================= components ===== */
@layer components {

  /* ---- layout ---- */
  .container {
    inline-size: 100%;
    max-inline-size: var(--container);
    margin-inline: auto;
    padding-inline: var(--gutter);
    padding-block: var(--space-5) var(--space-8);
  }

  .prose { max-inline-size: var(--measure); }

  .skip-link {
    position: absolute;
    inset-inline-start: -9999px;
    z-index: 10;
  }
  .skip-link:focus {
    inset-inline-start: var(--space-4);
    inset-block-start: var(--space-4);
    padding: var(--space-2) var(--space-4);
    background: var(--paper-raised);
    border: 1px solid var(--rule-strong);
    border-radius: var(--radius-md);
  }

  /* ---- nav ---- */
  .site-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: var(--space-3) var(--space-5);
    padding-block-end: var(--space-4);
    margin-block-end: var(--space-7);
    border-block-end: 1px solid var(--rule);
  }

  .site-nav__brand {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 700;
    letter-spacing: var(--tracking-tight);
    color: var(--ink-strong);
    text-decoration: none;
    margin-inline-end: auto;
  }
  .site-nav__brand:hover { color: var(--accent-ink); }

  .site-nav__links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2) var(--space-5);
    list-style: none;
    padding: 0;
    margin: 0;
  }
  .site-nav__links li { margin: 0; }

  .site-nav__links a {
    font-size: var(--text-sm);
    color: var(--ink-muted);
    text-decoration: none;
    padding-block-end: 2px;
    border-block-end: 1px solid transparent;
  }
  .site-nav__links a:hover { color: var(--ink-strong); }

  .site-nav__links a[aria-current="page"] {
    color: var(--ink-strong);
    border-block-end-color: var(--accent);
  }

  /* ---- buttons ---- */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-sm);
    font-weight: 600;
    line-height: 1.2;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
    background-color: var(--accent);
    color: #fff;
    border: 1px solid var(--accent);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xs);
    transition: background-color var(--dur) var(--ease),
                border-color var(--dur) var(--ease),
                transform var(--dur) var(--ease);
  }
  .btn:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
    color: #fff;
  }
  .btn:active { transform: translateY(1px); }
  .btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }

  .btn--outline {
    background-color: transparent;
    color: var(--accent-ink);
    border-color: var(--rule-strong);
    box-shadow: none;
  }
  .btn--outline:hover {
    background-color: var(--accent-wash);
    border-color: var(--accent);
    color: var(--accent-hover);
  }

  .btn--quiet {
    background-color: transparent;
    color: var(--ink-muted);
    border-color: transparent;
    box-shadow: none;
  }
  .btn--quiet:hover {
    background-color: var(--paper-sunk);
    color: var(--ink-strong);
    border-color: transparent;
  }

  .btn--danger { color: var(--warn-ink); }
  .btn--danger:hover {
    background-color: var(--warn-wash);
    border-color: var(--warn-rule);
    color: var(--warn-ink);
  }

  .btn--lg { padding: var(--space-4) var(--space-6); font-size: var(--text-base); }

  /* ---- flash messages ---- */
  .flash-messages {
    display: grid;
    gap: var(--space-2);
    margin-block-end: var(--space-6);
  }

  .flash {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    border-inline-start: 3px solid;
    font-size: var(--text-sm);
  }
  .flash.success { background: var(--ok-wash);   border-color: var(--ok-rule);   color: var(--ok-ink); }
  .flash.error   { background: var(--warn-wash); border-color: var(--warn-rule); color: var(--warn-ink); }
  .flash.info    { background: var(--info-wash); border-color: var(--info-rule); color: var(--info-ink); }

  /* ---- panels and callouts ---- */
  .panel {
    background-color: var(--paper-raised);
    border: 1px solid var(--rule);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    padding: var(--space-6);
  }

  .panel--narrow { max-inline-size: 26rem; margin-inline: auto; }

  .panel__header { margin-block-end: var(--space-5); }

  .panel__footer {
    margin-block-start: var(--space-5);
    padding-block-start: var(--space-4);
    border-block-start: 1px solid var(--rule);
    text-align: center;
    font-size: var(--text-sm);
    color: var(--ink-muted);
  }

  .callout {
    background-color: var(--paper-sunk);
    border-inline-start: 3px solid var(--accent);
    border-radius: var(--radius-md);
    padding: var(--space-4) var(--space-5);
  }
  .callout > * + * { margin-block-start: var(--space-3); }

  /* ---- hero ---- */
  .hero { margin-block-end: var(--space-7); }

  .hero__eyebrow {
    font-size: var(--text-xs);
    font-weight: 600;
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    color: var(--accent-ink);
    margin-block-end: var(--space-3);
  }

  .hero__title { max-inline-size: 18ch; }

  .hero__lede {
    font-size: var(--text-lg);
    color: var(--ink-muted);
    max-inline-size: 48ch;
    margin-block-start: var(--space-4);
  }

  /* ---- the URL form ---- */
  .url-form { margin-block-start: var(--space-6); }

  .url-form__row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
  }
  .url-form__row input { flex: 1 1 22rem; }

  .url-form__hint {
    margin-block-start: var(--space-3);
    font-size: var(--text-sm);
    color: var(--ink-muted);
  }

  /* ---- saved card list ---- */
  .card-list { display: grid; gap: var(--space-4); list-style: none; padding: 0; }
  .card-list li { margin: 0; }

  .card-item {
    display: block;
    padding: var(--space-5);
    background-color: var(--paper-raised);
    border: 1px solid var(--rule);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: inherit;
    box-shadow: var(--shadow-xs);
    transition: border-color var(--dur) var(--ease),
                box-shadow var(--dur) var(--ease),
                transform var(--dur) var(--ease);
  }
  .card-item:hover {
    border-color: var(--rule-strong);
    box-shadow: var(--shadow-card);
    transform: translateY(-1px);
    color: inherit;
  }

  .card-item__title {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--ink-strong);
    letter-spacing: var(--tracking-tight);
  }

  .card-item__meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1) var(--space-4);
    margin-block-start: var(--space-2);
    font-size: var(--text-sm);
    color: var(--ink-muted);
  }

  .source {
    font-size: var(--text-sm);
    color: var(--ink-muted);
    word-break: break-all;
  }

  .recipe-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2) var(--space-5);
    margin-block-start: var(--space-3);
    font-size: var(--text-sm);
    color: var(--ink-muted);
  }
  .recipe-meta span { white-space: nowrap; }

  /* ---- empty state ---- */
  .empty {
    text-align: center;
    padding: var(--space-8) var(--space-5);
    border: 1px dashed var(--rule-strong);
    border-radius: var(--radius-md);
    color: var(--ink-muted);
  }
  .empty > * + * { margin-block-start: var(--space-4); }

  /* =================================================================
     The index card.

     The wrapper paints the paper; the textarea paints only the ruling.
     Two details are load-bearing:

     1. background-attachment: local - a textarea's background does not
        scroll with its content by default, so without this the rules
        drift away from the text the moment it scrolls.
     2. font-family/font-size on the WRAPPER - `ch` resolves against the
        element's own font, so --card-gutter would otherwise mean "3 zeros
        of the body sans" and the margin rule would land in the wrong place.
     ================================================================= */
  .notecard {
    /* Solved so the card fits without clipping from 360px up, reaching its 15px
       cap around 770px. Below ~340px the card scrolls horizontally instead of
       shrinking into illegibility. */
    --card-fs: clamp(0.625rem, 0.349rem + 1.225vw, 0.9375rem);
    --card-lh: 1.6;
    --card-line: calc(var(--card-fs) * var(--card-lh));
    --card-pad: var(--space-5);
    --card-gutter: 3ch;
    --card-rule: rgb(140 176 199 / .38);

    font-family: var(--font-mono);
    font-size: var(--card-fs);

    position: relative;
    inline-size: fit-content;
    max-inline-size: 100%;
    background-color: var(--paper-raised);
    border: 1px solid var(--rule);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lift);
    padding: var(--card-pad);
    padding-inline-start: calc(var(--card-pad) + var(--card-gutter));
  }

  /* The margin rule lives in the padding gutter, never over the text: the ASCII
     art uses full 45-char "=====" separators, so a rule at column 3 would slash
     straight through them. On the wrapper, which never scrolls, so horizontal
     overflow inside the textarea cannot desync it. */
  .notecard::before {
    content: "";
    position: absolute;
    inset-block: 0;
    inset-inline-start: calc(var(--card-pad) + var(--card-gutter) - 1.4ch);
    border-inline-start: 1px solid rgb(181 86 58 / .32);
  }

  /* Reads instantly as a stack of cards */
  .notecard::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    transform: translate(5px, 5px);
    background-color: var(--paper-raised);
    border: 1px solid var(--rule);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
  }

  .notecard__text {
    box-sizing: content-box;
    /* 45 is the contract from notecard.py; the macro raises it if a line runs over */
    inline-size: calc(var(--card-cols, 45) * 1ch);
    max-inline-size: 100%;
    font: inherit;
    color: var(--ink);
    line-height: var(--card-line);
    white-space: pre;
    overflow-x: auto;
    overflow-y: hidden;
    background-color: transparent;
    border: 0;
    padding: 0;
    resize: none;
    box-shadow: none;
    -webkit-appearance: none;

    background-attachment: local;
    background-image: repeating-linear-gradient(
      to bottom,
      transparent 0,
      transparent calc(var(--card-line) - 1px),
      var(--card-rule) calc(var(--card-line) - 1px),
      var(--card-rule) var(--card-line)
    );
    background-position: 0 1px;

    field-sizing: content;      /* zero-JS autogrow where supported */
  }

  .notecard__text:focus {
    outline: none;
    border: 0;
    box-shadow: none;
    background-color: rgb(255 253 248 / .6);
  }

  .card-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-2);
    margin-block-start: var(--space-5);
  }

  .notecard-caption {
    margin-block-start: var(--space-3);
    font-size: var(--text-sm);
    color: var(--ink-muted);
  }

  /* ---- pending / loading ---- */
  .pending {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-block-start: var(--space-6);
    font-size: var(--text-sm);
    color: var(--ink-muted);
  }

  .pending__cursor {
    font-family: var(--font-mono);
    font-size: var(--text-lg);
    color: var(--accent);
    animation: blink 1s steps(2, start) infinite;
  }

  @keyframes blink { to { visibility: hidden; } }

  @media (prefers-reduced-motion: reduce) {
    .pending__cursor { animation: none; }
    * { transition-duration: 0.01ms !important; }
  }

  /* Narrow screens: claw back horizontal space so the 45-character card still
     fits without clipping. Every dimension derives from --card-fs, so this is
     really just one knob plus tighter padding. */
  @media (max-width: 30rem) {
    .container { padding-inline: var(--space-4); }
    .notecard { --card-pad: var(--space-3); --card-gutter: 2ch; }
    .notecard::before {
      inset-inline-start: calc(var(--card-pad) + var(--card-gutter) - 0.9ch);
    }
  }
}

/* ======================================================== utilities ===== */
@layer utilities {
  .cluster {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--cluster-gap, var(--space-3));
  }

  .flow > * + * { margin-block-start: var(--flow-space, var(--flow)); }

  .stack-lg > * + * { margin-block-start: var(--space-6); }

  .muted { color: var(--ink-muted); }

  .meta { font-size: var(--text-sm); color: var(--ink-muted); }

  .center { text-align: center; }

  .visually-hidden {
    position: absolute;
    inline-size: 1px;
    block-size: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
  }
}

/* ============================================================ print ===== */
@media print {
  /* 45 chars maps almost exactly onto a real 3x5 card: 5in minus margins leaves
     4.7in for 45 characters, which at a 0.6em advance is 12.5pt. */
  @page { size: 5in 3in; margin: 0.15in; }

  body { background: #fff; }

  .site-nav, .flash-messages, .cluster, .notecard-caption, .skip-link,
  .pending, form .btn { display: none !important; }

  .container { padding: 0; max-inline-size: none; }

  .notecard {
    /* Scale the type so the whole card lands on one 3x5 sheet. Height is the
       binding constraint (a 3in card holds ~20 lines at a legible size), so take
       whichever of the three limits is smallest. --card-rows/--card-cols come
       from the macro. Cards too long to fit legibly still flow to a second
       sheet, which is what the FRONT/BACK format in notecard.py expects. */
    --card-lh: 1.16;
    --card-fs: min(
      11pt,
      calc(2.5in / (var(--card-rows, 20) * 1.16)),
      calc(4.55in / (var(--card-cols, 45) * 0.62))
    );
    --card-pad: 0;
    --card-gutter: 0;
    box-shadow: none;
    border: 0;
    padding: 0;
    margin-inline: auto;
    background: #fff;
    break-inside: avoid;
  }
  .notecard::before, .notecard::after { display: none; }

  .notecard__text {
    background-image: none;
    overflow: visible;
    color: #000;
  }
}