/* ==================================================================
   Watermark KTP - built on the adityacprtm.dev design system.
   Tokens, type scale, radii, elevation, motion and a11y rules mirror
   https://adityacprtm.dev/design-system
================================================================== */

/* ---------- fonts (self-hosted, same-origin) ---------- */
@font-face { font-family: "Poppins"; font-style: normal; font-weight: 400; font-display: swap;
  src: url("./assets/fonts/poppins-400.woff2") format("woff2"); }
@font-face { font-family: "Poppins"; font-style: normal; font-weight: 500; font-display: swap;
  src: url("./assets/fonts/poppins-500.woff2") format("woff2"); }
@font-face { font-family: "Poppins"; font-style: normal; font-weight: 600; font-display: swap;
  src: url("./assets/fonts/poppins-600.woff2") format("woff2"); }
@font-face { font-family: "Space Grotesk"; font-style: normal; font-weight: 600; font-display: swap;
  src: url("./assets/fonts/space-grotesk-600.woff2") format("woff2"); }
@font-face { font-family: "Space Grotesk"; font-style: normal; font-weight: 700; font-display: swap;
  src: url("./assets/fonts/space-grotesk-700.woff2") format("woff2"); }

/* ---------- colour tokens ---------- */
:root {
  color-scheme: light dark;

  --c-bg: #f4f6fb;
  --c-surface: #ffffff;
  --c-surface-alt: #f0f3f9;
  --c-border: #e4eaf2;
  --c-border-ui: #828fa0;
  --c-text: #2d3748;
  --c-heading: #1a202c;
  --c-muted: #4a5568;

  --c-accent: #1a40d8;
  --c-accent-dark: #1a40d8;
  --c-gradient: linear-gradient(142.17deg, #2563eb 6.66%, #1a40d8 91.48%);

  --c-error: #dc2626;
  --c-dot-green: #16a34a;

  --c-nav-hover: #1a40d80f;
  --c-nav-active-bg: #1a40d814;
  --c-glow: #1a40d84d;

  --c-shadow-sm: #18274b0d;
  --elevation-surface: 0 1px 3px var(--c-shadow-sm), 0 4px 12px var(--c-shadow-sm);

  --color-skeleton-base: #e0e4ec;
  --color-skeleton-shine: #f0f3f9;

  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Menlo, Consolas, monospace;
  --font-body: "Poppins", system-ui, sans-serif;
  --font-display: "Space Grotesk", "Poppins", system-ui, sans-serif;

  /* space */
  --s-2: 0.375rem; --s-3: 0.5rem; --s-4: 0.75rem;
  --s-5: 1rem; --s-6: 1.25rem; --s-7: 1.5rem; --s-9: 2.5rem;

  /* radius */
  --r-xs: 4px; --r-sm: 6px; --r-md: 8px; --r-lg: 12px; --r-xl: 14px; --r-pill: 999px;

  /* type scale */
  --font-xs: 11px; --font-sm: 12px; --font-btn: 13px;
  --font-body-sm: 14px; --font-base: 16px; --font-lg: 18px; --font-2xl: 22px;
}

[data-theme="dark"] {
  --c-bg: #0d0e12;
  --c-surface: #16181f;
  --c-surface-alt: #1e2129;
  --c-border: #2a2e3a;
  --c-border-ui: #6e7a96;
  --c-text: #c8cdd8;
  --c-heading: #f0f1f5;
  --c-muted: #8b8fa3;

  --c-accent: #5b8def;
  --c-accent-dark: #3b6dcf;
  --c-gradient: linear-gradient(142.17deg, #3b9fea 6.66%, #1a40d8 91.48%);

  --c-error: #f87171;
  --c-dot-green: #4ade80;

  --c-nav-hover: #5b8def14;
  --c-nav-active-bg: #5b8def1f;
  --c-glow: #5b8def59;

  --c-shadow-sm: #03061247;

  --color-skeleton-base: #2a2d3a;
  --color-skeleton-shine: #32364a;
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--font-base);
  line-height: 1.55;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}

p { margin: 0; }

*:focus-visible {
  border-radius: var(--r-xs);
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute; left: var(--s-5); top: -3rem;
  background: var(--c-surface); color: var(--c-heading);
  padding: var(--s-3) var(--s-4); border-radius: var(--r-md);
  border: 1px solid var(--c-border); z-index: 20;
  transition: top 0.2s ease;
}
.skip-link:focus { top: var(--s-5); }

/* ---------- shell ---------- */
.shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: var(--s-7) var(--s-6) var(--s-9);
  display: grid;
  gap: var(--s-5);
}

/* ---------- box ---------- */
.box {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  box-shadow: var(--elevation-surface);
}

/* ---------- header ---------- */
.header {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: var(--s-6);
  padding: var(--s-5) var(--s-6);
}
@media (max-width: 860px) { .header { grid-template-columns: 1fr auto; } .header__signal { display: none; } }

.identity { display: flex; align-items: center; gap: var(--s-4); min-width: 0; }
.mark {
  width: 44px; height: 44px; flex: 0 0 auto;
  border-radius: var(--r-lg);
  background: var(--c-gradient);
  color: #fff;
  display: grid; place-items: center;
  box-shadow: 0 8px 20px -8px var(--c-glow);
}
.identity__name { margin: 0; font-family: var(--font-display); font-weight: 700; font-size: var(--font-2xl); letter-spacing: -0.02em; color: var(--c-heading); }
.identity__role { font-size: var(--font-sm); color: var(--c-muted); }

.signal__kicker {
  font-family: var(--font-mono); font-size: var(--font-xs); letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--c-muted); margin-bottom: var(--s-2);
}
.signal__status { display: flex; align-items: center; gap: var(--s-3); font-size: var(--font-body-sm); font-weight: 500; color: var(--c-heading); }
.signal__dot { width: 8px; height: 8px; border-radius: var(--r-pill); background: var(--c-dot-green); box-shadow: 0 0 0 3px color-mix(in srgb, var(--c-dot-green) 22%, transparent); }
.signal__meta { font-size: var(--font-xs); color: var(--c-muted); margin-top: var(--s-2); }

.header__action { display: flex; align-items: center; gap: var(--s-4); }

.theme-toggle {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font: inherit; font-size: var(--font-sm); font-weight: 500;
  color: var(--c-text); background: var(--c-surface-alt);
  border: 1px solid var(--c-border); border-radius: var(--r-pill);
  padding: var(--s-2) var(--s-4); cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}
.theme-toggle__icon { display: grid; place-items: center; color: var(--c-accent); }
.theme-toggle .moon { display: none; }
[data-theme="dark"] .theme-toggle .sun { display: none; }
[data-theme="dark"] .theme-toggle .moon { display: block; }

/* ---------- layout row ---------- */
.main { display: grid; gap: var(--s-5); }
.row { display: grid; grid-template-columns: 1.6fr 1fr; gap: var(--s-5); align-items: start; }
@media (max-width: 940px) {
  .row { grid-template-columns: 1fr; }
  .controls { position: static !important; max-height: none !important; overflow: visible !important; }
}
@media (min-width: 941px) {
  /* Capped to the space actually available below the header, published as
     --controls-max by layoutControls() in app.js. position:sticky was removed:
     its containing block (.row) is only as tall as the panel itself, so it
     could never travel and never engaged. */
  .controls { max-height: var(--controls-max, calc(100dvh - 2 * var(--s-5))); overflow: auto; }
}

/* ---------- stage ---------- */
.stage { padding: var(--s-5); }
.canvas-wrap {
  display: grid; place-items: center;
  padding: var(--s-4); border-radius: var(--r-md);
  background-color: var(--c-surface-alt);
  background-image:
    linear-gradient(45deg, var(--color-skeleton-base) 25%, transparent 25%),
    linear-gradient(-45deg, var(--color-skeleton-base) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--color-skeleton-base) 75%),
    linear-gradient(-45deg, transparent 75%, var(--color-skeleton-base) 75%);
  background-size: 22px 22px;
  background-position: 0 0, 0 11px, 11px -11px, -11px 0;
}
#canvas { display: block; max-width: 100%; border-radius: var(--r-xs); touch-action: none; cursor: grab; }
#canvas.dragging { cursor: grabbing; }

.hint { font-family: var(--font-mono); font-size: var(--font-xs); color: var(--c-muted); text-align: center; margin-top: var(--s-4); }

.stage__actions { display: flex; justify-content: flex-end; gap: var(--s-3); margin-top: var(--s-5); flex-wrap: wrap; }

/* dropzone (empty state) */
.dropzone {
  display: grid; place-items: center; gap: var(--s-3); text-align: center;
  padding: clamp(2.5rem, 9vw, 5rem) var(--s-6);
  border: 1.5px dashed var(--c-border-ui);
  border-radius: var(--r-lg);
  background: var(--c-surface);
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}
@media (hover: hover) and (pointer: fine) {
  .dropzone:hover { border-color: var(--c-accent); background: var(--c-nav-hover); }
}
.dropzone.dragging, .dropzone.drop-active { border-color: var(--c-accent); background: var(--c-nav-hover); }
.dropzone__icon {
  width: 56px; height: 56px; border-radius: var(--r-xl);
  display: grid; place-items: center;
  background: var(--c-nav-active-bg); color: var(--c-accent);
}
.dropzone__title { font-family: var(--font-display); font-size: var(--font-lg); font-weight: 600; color: var(--c-heading); }
.dropzone__sub { color: var(--c-muted); font-size: var(--font-body-sm); }

/* ---------- controls ---------- */
.controls { padding: var(--s-2) var(--s-6) var(--s-6); }
.sec { padding: var(--s-6) 0; border-bottom: 1px solid var(--c-border); }
.sec:last-of-type { border-bottom: 0; }
.sec__kicker { font-family: var(--font-mono); font-size: var(--font-xs); letter-spacing: 0.1em; text-transform: uppercase; color: var(--c-muted); margin-bottom: var(--s-5); }

.field { margin-bottom: var(--s-5); }
.field:last-child { margin-bottom: 0; }
.field > label { display: block; font-family: var(--font-mono); font-size: var(--font-xs); letter-spacing: 0.06em; text-transform: uppercase; color: var(--c-muted); margin-bottom: var(--s-2); }
.label-row { display: flex; align-items: baseline; justify-content: space-between; gap: var(--s-3); margin-bottom: var(--s-3); }
.label-row label { font-family: var(--font-mono); font-size: var(--font-xs); letter-spacing: 0.06em; text-transform: uppercase; color: var(--c-muted); }
.label-row output { font-family: var(--font-mono); font-size: var(--font-xs); color: var(--c-accent); font-weight: 600; }

input[type="text"], input[type="date"], select {
  width: 100%; padding: var(--s-4) var(--s-4);
  font: inherit; color: var(--c-text);
  background: var(--c-surface-alt);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}
input[type="text"]::placeholder { color: var(--c-muted); }
input[type="text"]:focus, input[type="date"]:focus, select:focus { outline: none; border-color: var(--c-accent); box-shadow: 0 0 0 3px var(--c-nav-active-bg); }

input[type="range"] { width: 100%; accent-color: var(--c-accent); }

/* segmented control */
.seg { display: inline-flex; padding: 3px; background: var(--c-surface-alt); border: 1px solid var(--c-border); border-radius: var(--r-md); }
.seg__btn {
  font: inherit; font-family: var(--font-mono); font-size: var(--font-xs); letter-spacing: 0.04em;
  color: var(--c-muted); background: transparent; border: 0; cursor: pointer;
  padding: var(--s-2) var(--s-4); border-radius: var(--r-sm);
  transition: background 0.18s ease, color 0.18s ease;
}
.seg__btn[aria-pressed="true"] { background: var(--c-accent); color: #fff; }
[data-theme="dark"] .seg__btn[aria-pressed="true"] { background: var(--c-accent-dark); }

/* pills */
.pills { display: flex; flex-wrap: wrap; gap: var(--s-3); }
.pill {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font: inherit; font-size: var(--font-sm); font-weight: 500; color: var(--c-text);
  background: var(--c-surface-alt); border: 1px solid var(--c-border);
  border-radius: var(--r-pill); padding: var(--s-3) var(--s-4); cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}
@media (hover: hover) and (pointer: fine) {
  .pill:hover { border-color: var(--c-accent); color: var(--c-accent); }
}

/* colour */
.color-row { display: flex; align-items: center; gap: var(--s-4); }
input[type="color"] { width: 46px; height: 40px; padding: 3px; border: 1px solid var(--c-border); border-radius: var(--r-md); background: var(--c-surface-alt); cursor: pointer; }
.swatches { display: flex; flex-wrap: wrap; gap: var(--s-2); }
.swatch { width: 28px; height: 28px; padding: 0; border-radius: var(--r-sm); border: 1px solid var(--c-border); cursor: pointer; transition: transform 0.12s ease, box-shadow 0.12s ease; }
@media (hover: hover) and (pointer: fine) { .swatch:hover { transform: translateY(-1px); } }
.swatch[aria-pressed="true"] { box-shadow: 0 0 0 2px var(--c-surface), 0 0 0 4px var(--c-accent); }

.checks { display: flex; gap: var(--s-5); flex-wrap: wrap; }
.check { display: flex; align-items: center; gap: var(--s-3); font-size: var(--font-body-sm); color: var(--c-text); }
.check input { width: 16px; height: 16px; accent-color: var(--c-accent); }

/* buttons */
.btn {
  display: inline-flex; align-items: center; gap: var(--s-3);
  font: inherit; font-family: var(--font-body); font-size: var(--font-btn); font-weight: 600;
  padding: var(--s-4) var(--s-6); border-radius: var(--r-md);
  border: 1px solid var(--c-border); background: var(--c-surface); color: var(--c-heading);
  cursor: pointer; transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.08s ease;
}
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn--primary { background: var(--c-gradient); color: #fff; border-color: transparent; box-shadow: 0 10px 24px -12px var(--c-glow); }
@media (hover: hover) and (pointer: fine) { .btn--primary:hover:not(:disabled) { filter: brightness(1.06); } }
.btn--ghost { background: var(--c-surface); border-color: var(--c-border-ui); }
@media (hover: hover) and (pointer: fine) { .btn--ghost:hover { border-color: var(--c-accent); color: var(--c-accent); } }
.btn--quiet { width: 100%; justify-content: center; background: transparent; border-color: transparent; color: var(--c-accent); }
@media (hover: hover) and (pointer: fine) { .btn--quiet:hover { background: var(--c-nav-hover); } }

/* ---------- about / informational content ---------- */
.about {
  padding: var(--s-7) var(--s-6);
  display: grid;
  gap: var(--s-7);
}
.about h2 {
  margin: 0 0 var(--s-3);
  font-family: var(--font-display);
  font-size: var(--font-lg);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--c-heading);
}
.about p { max-width: 68ch; font-size: var(--font-body-sm); color: var(--c-text); }
.about__grid { display: grid; gap: var(--s-7); }
@media (min-width: 720px) { .about__grid { grid-template-columns: 1fr 1fr; } }
.about__steps { margin: 0; padding-left: 1.15rem; display: grid; gap: var(--s-3); font-size: var(--font-body-sm); color: var(--c-text); }
.about__faq { display: grid; }
.about__faq details { border-top: 1px solid var(--c-border); padding: var(--s-4) 0; }
.about__faq details:last-child { border-bottom: 1px solid var(--c-border); }
.about__faq summary {
  display: flex; align-items: center; justify-content: space-between; gap: var(--s-4);
  cursor: pointer; font-weight: 600; color: var(--c-heading); list-style: none;
}
.about__faq summary::-webkit-details-marker { display: none; }
.about__faq summary::after { content: "+"; font-family: var(--font-mono); font-weight: 400; color: var(--c-accent); }
.about__faq details[open] summary::after { content: "\2212"; }
.about__faq p { margin-top: var(--s-3); color: var(--c-muted); }

/* status + footer */
.status { min-height: 1.1rem; margin-top: var(--s-4); font-size: var(--font-body-sm); color: var(--c-muted); }
.status[data-tone="error"] { color: var(--c-error); font-weight: 500; }

/* skeleton loader (the only loading state) */
.skeleton { position: relative; overflow: hidden; border-radius: var(--r-sm); background: var(--color-skeleton-base); }
.skeleton::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, var(--color-skeleton-shine), transparent);
  transform: translateX(-100%);
  animation: skeleton-sweep 1.4s ease-in-out infinite;
}
.skeleton--panel { height: 320px; border-radius: var(--r-lg); }

/* ---------- motion ---------- */
@keyframes box-entrance { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
@keyframes skeleton-sweep { to { transform: translateX(100%); } }

.box-entrance { animation: box-entrance 0.55s ease both; }
.box-entrance--2 { animation-delay: 0.08s; }
.box-entrance--3 { animation-delay: 0.16s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .skeleton::after { display: none; }
}

/* ---------- narrow screens (phones) ---------- */
@media (max-width: 560px) {
  .identity__name { font-size: var(--font-lg); }
  .mark { width: 40px; height: 40px; }

  /* tighter gutters so big controls still fit; safe for notched phones */
  .shell {
    padding: var(--s-6) var(--s-4) var(--s-7);
    padding-left: max(var(--s-4), env(safe-area-inset-left));
    padding-right: max(var(--s-4), env(safe-area-inset-right));
  }
  .header { padding: var(--s-5) var(--s-4); }
  .stage { padding: var(--s-4); }
  .controls { padding: var(--s-2) var(--s-5) var(--s-5); }
  .sec { padding: var(--s-5) 0; }
  .about { padding: var(--s-6) var(--s-5); gap: var(--s-6); }
  .about__grid { gap: var(--s-6); }

  /* header: icon-only theme toggle, still a full 44px target */
  .theme-toggle { width: 44px; height: 44px; padding: 0; justify-content: center; }
  #theme-label { display: none; }

  /* touch targets: comfortable 44px minimum */
  .pill { min-height: 44px; padding: var(--s-4) var(--s-5); }
  .seg__btn { min-height: 44px; padding: var(--s-4) var(--s-5); }
  /* let the preset swatches use the full row (picker stacks above them) */
  .color-row { flex-direction: column; align-items: flex-start; }
  .swatches { gap: var(--s-3); }
  .swatch { width: 44px; height: 44px; }
  .checks { gap: var(--s-4) var(--s-6); }
  .check { min-height: 44px; gap: var(--s-4); }
  .check input { width: 20px; height: 20px; }
  input[type="color"] { width: 48px; height: 44px; }
  input[type="range"] { height: 44px; }

  /* stage actions: side by side when they fit, full-width stacked when not */
  .stage__actions .btn { flex: 1 1 auto; justify-content: center; white-space: nowrap; }
}