@tailwind base;
@tailwind components;
@tailwind utilities;

/* ---------------------------------------------------------------------------
   TechTotz: riso workbook.
   Bright cool stock, three spot inks (pink, blue, sunflower) and what they make
   when they overprint. Full ink marks what is ready now; everything else is one ink.
   --------------------------------------------------------------------------- */

@font-face {
  font-family: "Caprasimo";
  src: url("/fonts/Caprasimo-Regular.ttf") format("truetype");
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Atkinson Hyperlegible Next";
  src: url("/fonts/AtkinsonHyperlegibleNext-Variable.ttf") format("truetype");
  font-weight: 200 800;
  font-display: swap;
}

:root {
  --paper: #F2F5F9;
  --ink: #14143A;
  --blue-fill: #2F6BFF;
  --pink-fill: #FF4DA6;
  --sun-fill: #FFD21F;
  --green-fill: #19B36B;
  --orange-fill: #FF7A2E;
  --violet-fill: #8B5CF6;
  --radius: 0.375rem;
  --border: 0 0% 55%;
  --input: 0 0% 55%;
  --ring: 231 71% 45%;
  --background: 213 33% 97%;
  --foreground: 240 63% 15%;
}

@layer base {
  html {
    background-color: var(--paper);
    color: var(--ink);
    -webkit-text-size-adjust: 100%;
    scroll-padding-top: 5rem;
  }

  body {
    font-family: "Atkinson Hyperlegible Next", ui-sans-serif, system-ui, sans-serif;
    font-feature-settings: "tnum" 0;
    line-height: 1.6;
  }

  /* Paper tooth: a fixed, static grain laid over everything, never over interaction. */
  body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 90;
    pointer-events: none;
    opacity: 0.07;
    mix-blend-mode: multiply;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.08  0 0 0 0 0.08  0 0 0 0 0.23  0 0 0 0.9 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  }

  h1, h2 {
    font-family: Caprasimo, Georgia, serif;
    font-weight: 400;
    letter-spacing: -0.01em;
    text-wrap: balance;
  }

  h3, h4 {
    text-wrap: balance;
  }

  p, li {
    text-wrap: pretty;
  }

  ::selection {
    background: var(--sun-fill);
    color: var(--ink);
  }

  :focus-visible {
    outline: 3px solid #2236C4;
    outline-offset: 3px;
    border-radius: 2px;
  }

  ::placeholder {
    color: #54547D;
    opacity: 1;
  }

  a {
    text-underline-offset: 0.2em;
    text-decoration-thickness: 1.5px;
  }

  /* Scrollbars print in the same ink as the rules. */
  * {
    scrollbar-color: #8E94BC #E6ECF4;
  }

  input[type="text"], input[type="email"], input[type="password"], input[type="number"],
  input[type="tel"], input[type="url"], input[type="search"], input[type="date"],
  textarea, select {
    background-color: #fff;
    color: var(--ink);
    border: 2px solid var(--ink);
    border-radius: var(--radius);
  }

  input[type="text"]:focus, input[type="email"]:focus, input[type="password"]:focus,
  input[type="number"]:focus, input[type="tel"]:focus, input[type="url"]:focus,
  input[type="search"]:focus, input[type="date"]:focus, textarea:focus, select:focus {
    border-color: #2236C4;
    --tw-ring-color: #2F6BFF;
    --tw-ring-offset-width: 0px;
  }

  input[type="checkbox"], input[type="radio"] {
    border: 2px solid var(--ink);
    color: #2236C4;
  }
}

@layer utilities {
  .layout {
    @apply max-w-7xl mx-auto px-4 sm:px-6 lg:px-8;
  }

  /* Halftone dot field for a plate of ink. Set --dot to the ink colour. */
  .halftone {
    background-image: radial-gradient(circle, var(--dot, #2F6BFF) 1.4px, transparent 1.7px);
    background-size: 9px 9px;
  }

  /* Overprint: inks multiply into new colours where they overlap. */
  .overprint {
    mix-blend-mode: multiply;
  }

  .ruled {
    background-image: repeating-linear-gradient(transparent 0 31px, rgba(142, 148, 188, 0.55) 31px 32px);
  }

  .fill-in-line {
    border-bottom: 2px dotted var(--ink);
  }
}

@layer components {
  /* Legacy plain button class kept for scaffold views. */
  .btn {
    @apply px-8 py-3 text-base font-bold;
    border: 2px solid var(--ink);
    border-radius: var(--radius);
    background: var(--pink-fill);
    color: var(--ink);
  }

  /* ----- Buttons: printed labels. Hover is a registration shift of the second ink. ----- */
  .stamp-btn {
    border: 2px solid var(--ink);
    border-radius: var(--radius);
    background: var(--btn-fill, #fff);
    color: var(--ink);
    box-shadow: 0 0 0 0 var(--btn-plate, var(--blue-fill));
    transition: box-shadow 140ms cubic-bezier(0.22, 1, 0.36, 1), transform 140ms cubic-bezier(0.22, 1, 0.36, 1), background-color 140ms;
    cursor: pointer;
  }
  .stamp-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 4px 4px 0 0 var(--btn-plate, var(--blue-fill));
  }
  .stamp-btn:active {
    transform: translate(0, 0);
    box-shadow: 0 0 0 0 var(--btn-plate, var(--blue-fill));
  }
  .stamp-btn:disabled, .stamp-btn[aria-disabled="true"] {
    opacity: 0.55;
    pointer-events: none;
  }
  .stamp-btn--primary   { --btn-fill: var(--pink-fill); --btn-plate: var(--blue-fill); }
  .stamp-btn--secondary { --btn-fill: var(--sun-fill);  --btn-plate: var(--pink-fill); }
  .stamp-btn--outline   { --btn-fill: transparent;      --btn-plate: var(--sun-fill); }
  .stamp-btn--blue      { --btn-fill: var(--blue-fill); --btn-plate: var(--sun-fill); color: #fff; }
  .stamp-btn--green     { --btn-fill: var(--green-fill); --btn-plate: var(--sun-fill); }
  .stamp-btn--quiet     { --btn-fill: #fff;             --btn-plate: var(--sun-fill); }
  .stamp-btn--danger    { --btn-fill: #fff; color: #C8102E; border-color: #C8102E; --btn-plate: #FFC9D1; }

  /* Highlighter plate: the sunflower ink laid under a phrase. */
  .marker {
    background-image: linear-gradient(transparent 58%, var(--sun-fill) 58%, var(--sun-fill) 92%, transparent 92%);
    box-decoration-break: clone;
    -webkit-box-decoration-break: clone;
    color: var(--ink);
  }

  .marker--pink {
    background-image: linear-gradient(transparent 58%, var(--pink-fill) 58%, var(--pink-fill) 92%, transparent 92%);
  }

  /* A tint plate: one ink printed as a halftone across a whole section. */
  .halftone-wash {
    background-color: var(--paper);
    background-image: radial-gradient(circle, var(--wash, #2F6BFF) 1.5px, transparent 1.8px);
    background-size: 14px 14px;
    background-position: 0 0;
  }
  .halftone-wash > * { position: relative; }

  /* Cover art goes through the press: one ink, multiplied onto a spot-colour plate. Colour returns on hover. */
  .riso-plate { background: var(--plate, var(--pink-fill)); }
  .riso-plate img {
    filter: grayscale(1) contrast(1.15);
    mix-blend-mode: multiply;
    transition: filter 200ms, mix-blend-mode 200ms;
  }
  .riso-plate:hover img { filter: none; mix-blend-mode: normal; }

  /* Table row actions: plain underlined words, not three buttons per row. */
  .row-link {
    font-weight: 800;
    font-size: 0.875rem;
    color: var(--ink);
    text-decoration: underline;
    text-decoration-thickness: 2px;
    padding: 0.25rem 0.5rem;
    background: none;
    border: 0;
    cursor: pointer;
  }
  .row-link:hover { background: var(--sun-fill); }
  .row-link--danger { color: #C8102E; }

  /* ----- Pitch deck: one idea per screen, snapping on scroll. ----- */
  html.deck { scroll-snap-type: y proximity; }
  html.deck body > div > footer { margin-top: 0; }
  .slide {
    min-height: calc(100svh - 4.5rem);
    display: flex;
    align-items: center;
    scroll-snap-align: start;
    scroll-margin-top: 4.5rem;
    padding: 3.5rem 0 5.5rem;
  }
  .slide > .slide-inner {
    width: 100%;
    max-width: 80rem;
    margin: 0 auto;
    padding: 0 1rem;
  }
  @media (min-width: 640px) { .slide > .slide-inner { padding: 0 1.5rem; } }
  @media (min-width: 1024px) { .slide > .slide-inner { padding: 0 2rem; } }
  .slide--bare { padding: 0; display: block; }

  .deck-controls {
    position: fixed;
    left: 50%;
    bottom: 1rem;
    transform: translateX(-50%);
    z-index: 60;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.4rem 0.6rem;
    background: var(--paper);
    border: 2px solid var(--ink);
    border-radius: var(--radius);
    max-width: calc(100vw - 2rem);
  }
  .deck-count { font-weight: 800; font-size: 0.875rem; color: var(--ink); white-space: nowrap; }
  .deck-title { font-weight: 600; color: #363663; margin-left: 0.25rem; }
  @media (max-width: 520px) { .deck-title { display: none; } }
  .deck-btn {
    width: 2.5rem; height: 2.5rem;
    border: 2px solid var(--ink);
    border-radius: var(--radius);
    background: #fff;
    font-weight: 800;
    color: var(--ink);
    cursor: pointer;
  }
  .deck-btn:hover { background: var(--sun-fill); }

  .nav-link {
    @apply font-bold text-ink px-2 py-1 rounded-sm;
    transition: background-color 120ms;
  }
  .nav-link:hover { background: var(--sun-fill); }

  .footer-link {
    @apply text-sm text-paper/90 font-medium underline decoration-paper/30;
  }
  .footer-link:hover { color: var(--sun-fill); text-decoration-color: var(--sun-fill); }

  /* ----- Pages: the card replacement. A workbook page with an ink band across the top. ----- */
  .page-card {
    position: relative;
    background: linear-gradient(var(--page-ink, var(--blue-fill)) 0 8px, #fff 8px);
    border: 2px solid var(--ink);
    border-radius: var(--radius);
    transition: transform 160ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 160ms cubic-bezier(0.22, 1, 0.36, 1);
  }
  a.page-card:hover, .page-card--lift:hover {
    transform: translate(-2px, -2px);
    box-shadow: 5px 5px 0 0 var(--page-ink, var(--blue-fill));
  }
  .page-card--cyan, .page-card--blue, .page-card--cosmic { --page-ink: var(--blue-fill); }
  .page-card--pink { --page-ink: var(--pink-fill); }
  .page-card--purple { --page-ink: var(--violet-fill); }
  .page-card--lime, .page-card--green { --page-ink: var(--green-fill); }
  .page-card--orange { --page-ink: var(--orange-fill); }
  .page-card--sun { --page-ink: var(--sun-fill); }
  .page-card--none { --page-ink: var(--ink); }

  /* A rubber stamp: rotated, ink-bordered, slightly uneven. */
  .rubber-stamp {
    display: inline-block;
    border: 3px solid var(--stamp-ink, #C0125E);
    color: var(--stamp-ink, #C0125E);
    border-radius: 0.5rem;
    padding: 0.15rem 0.7rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transform: rotate(-5deg);
    mix-blend-mode: multiply;
  }
  .rubber-stamp--land { animation: stamp 0.5s cubic-bezier(0.22, 1, 0.36, 1) both; }

  /* Spot-ink fields for whole regions of a page. */
  .field-pink   { background: var(--pink-fill); color: var(--ink); }
  .field-blue   { background: var(--blue-fill); color: #fff; }
  .field-sun    { background: var(--sun-fill);  color: var(--ink); }
  .field-green  { background: var(--green-fill); color: var(--ink); }
}

/* Reduced motion: no stamps landing, no registration shifts; state changes stay. */
@media (prefers-reduced-motion: reduce) {
  .animate-stamp,
  .rubber-stamp--land,
  .animate-pulse,
  .animate-ping {
    animation: none;
  }
  .stamp-btn, .page-card {
    transition: none;
  }
  .stamp-btn:hover, a.page-card:hover, .page-card--lift:hover {
    transform: none;
  }
  .flashcard-inner {
    transition: none;
  }
}