:root {
  --paper: #f4edd8;
  --paper-2: #e9e0c6;
  --ink: #181308;
  --protein: #2f53c8; /* riso blue */
  --carb: #e0a51f;    /* riso gold */
  --fat: #d83621;     /* riso vermillion */
  --accent: #d83621;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--paper-2);
  color: var(--ink);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 2.5rem 1.25rem;
  -webkit-font-smoothing: antialiased;
}

/* Paper grain */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.05;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.app { width: 100%; max-width: 430px; }

.label {
  background: var(--paper);
  border: 3px solid var(--ink);
  padding: 1.4rem 1.3rem 1.5rem;
  box-shadow: 9px 9px 0 var(--ink);
}

/* ---- Masthead ---- */
.masthead {
  border-bottom: 8px solid var(--ink);
  padding-bottom: 0.7rem;
  margin-bottom: 0.55rem;
}
h1 {
  margin: 0;
  font-size: clamp(1.9rem, 8vw, 2.6rem);
  font-weight: 900;
  line-height: 0.9;
  letter-spacing: -0.035em;
  text-transform: uppercase;
}
.swap { font-weight: 400; }
.tagline {
  margin: 0.55rem 0 0;
  font-size: 0.8rem;
  font-weight: 500;
  line-height: 1.35;
}

/* ---- "Amount per day" + hero calories ---- */
.per {
  margin: 0.15rem 0 0.1rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}
.hero {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 8px solid var(--ink);
  padding-bottom: 0.1rem;
}
.hero__name {
  font-size: clamp(1.4rem, 6vw, 2rem);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  padding-bottom: 0.55rem;
}
.hero__value {
  font-size: clamp(3.3rem, 17vw, 5rem);
  font-weight: 900;
  line-height: 0.8;
  letter-spacing: -0.045em;
  font-variant-numeric: tabular-nums;
}

/* ---- Column header ---- */
.col-head {
  display: flex;
  justify-content: space-between;
  margin: 0;
  padding: 0.5rem 0 0.4rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  border-bottom: 1.5px solid var(--ink);
}

/* ---- Rows (line item + slider beneath) ---- */
.row {
  display: grid;
  grid-template-columns: 2.75rem 1fr auto auto minmax(3.4rem, auto);
  grid-template-areas:
    "lock name number unit pct"
    "slider slider slider slider slider";
  align-items: center;
  column-gap: 0.55rem;
  row-gap: 0.5rem;
  padding: 0.7rem 0 0.75rem;
  border-top: 1.5px solid var(--ink);
}
.row--protein { --c: var(--protein); }
.row--carb { --c: var(--carb); }
.row--fat { --c: var(--fat); }
.row-calories { --c: var(--ink); border-top: none; }

.row__name {
  grid-area: name;
  font-weight: 800;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
}
.row .unit { grid-area: unit; font-weight: 700; font-size: 0.82rem; }
.row .readout {
  grid-area: pct;
  text-align: right;
  font-weight: 800;
  font-size: 1.1rem;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.readout__pct { font-size: 0.62em; margin-left: 0.05em; }
.readout__kcal {
  display: block;
  margin-top: 0.2rem;
  font-weight: 500;
  font-size: 0.66rem;
  letter-spacing: 0.02em;
  opacity: 0.65;
}
.row-calories .readout {
  font-size: 0.64rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  opacity: 0.7;
}

/* ---- Lock buttons ---- */
.lock {
  grid-area: lock;
  width: 2.4rem;
  height: 2.4rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 0;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
}
.lock[aria-pressed="true"] { background: color-mix(in srgb, var(--c, var(--ink)) 38%, var(--paper)); }
.lock:active { box-shadow: 2px 2px 0 var(--ink); }
.lock:disabled { opacity: 0.3; cursor: not-allowed; }

input:disabled { opacity: 0.4; cursor: not-allowed; }

/* ---- Number inputs ---- */
input[type="number"] {
  grid-area: number;
  width: 5.2rem;
  background: var(--paper);
  color: var(--ink);
  border: 2px solid var(--ink);
  border-radius: 0;
  padding: 0.38rem 0.45rem;
  font: inherit;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
input[type="number"]:focus { outline: none; box-shadow: 3px 3px 0 var(--ink); }

/* ---- Sliders (inked bar with a square thumb) ---- */
input[type="range"] {
  grid-area: slider;
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 12px;
  box-sizing: border-box;
  border: 2px solid var(--ink);
  background: linear-gradient(
    to right,
    var(--c, var(--ink)) calc(var(--val, 0) * 1%),
    transparent calc(var(--val, 0) * 1%)
  );
}
input[type="range"]::-moz-range-track {
  height: 12px;
  box-sizing: border-box;
  border: 2px solid var(--ink);
  background: transparent;
}
input[type="range"]::-moz-range-progress {
  height: 12px;
  background: var(--c, var(--ink));
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 26px;
  margin-top: -9px; /* center 26px thumb over the 12px track box */
  border-radius: 0;
  background: var(--ink);
  border: 2px solid var(--paper);
}
input[type="range"]::-moz-range-thumb {
  width: 12px;
  height: 24px;
  border-radius: 0;
  background: var(--ink);
  border: 2px solid var(--paper);
}
input[type="range"]:active::-webkit-slider-thumb { background: var(--c, var(--ink)); }
input[type="range"]:active::-moz-range-thumb { background: var(--c, var(--ink)); }
input[type="range"]:focus-visible { outline: none; }
input[type="range"]:focus-visible::-webkit-slider-thumb { outline: 2px solid var(--ink); outline-offset: 2px; }
input[type="range"]:focus-visible::-moz-range-thumb { outline: 2px solid var(--ink); outline-offset: 2px; }
input[type="range"]:disabled { cursor: not-allowed; }

/* ---- Calorie split bar ---- */
.split {
  border-top: 8px solid var(--ink);
  margin-top: 0.45rem;
  padding-top: 0.75rem;
}
.split__head {
  margin: 0 0 0.55rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}
.bar {
  display: flex;
  height: 30px;
  border: 2.5px solid var(--ink);
  overflow: hidden;
}
.bar-seg { height: 100%; }
.bar-seg + .bar-seg { border-left: 2px solid var(--ink); }
.bar-protein { background: var(--protein); }
.bar-carb { background: var(--carb); }
.bar-fat { background: var(--fat); }

.bar-legend {
  display: flex;
  gap: 1.1rem;
  margin-top: 0.6rem;
  font-size: 0.78rem;
  font-weight: 700;
}
.key { display: inline-flex; align-items: center; }
.key::before {
  content: "";
  display: inline-block;
  width: 0.8rem;
  height: 0.8rem;
  border: 1.5px solid var(--ink);
  margin-right: 0.35rem;
}
.key-protein::before { background: var(--protein); }
.key-carb::before { background: var(--carb); }
.key-fat::before { background: var(--fat); }

/* ---- One-shot "printed in" stagger ---- */
@keyframes ink-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}
.masthead, .per, .hero, .col-head, .row, .split {
  animation: ink-in 0.45s both;
}
.masthead { animation-delay: 0.02s; }
.per { animation-delay: 0.08s; }
.hero { animation-delay: 0.12s; }
.row-calories { animation-delay: 0.16s; }
.col-head { animation-delay: 0.20s; }
.row--protein { animation-delay: 0.24s; }
.row--carb { animation-delay: 0.28s; }
.row--fat { animation-delay: 0.32s; }
.split { animation-delay: 0.36s; }

/* ---- Touch / small screens ---- */
@media (max-width: 520px) {
  body { padding: 1.5rem 0.9rem; }
  .label { padding: 1.2rem 1.05rem 1.35rem; box-shadow: 6px 6px 0 var(--ink); }
}
@media (max-width: 520px), (pointer: coarse) {
  .lock { width: 44px; height: 44px; font-size: 1.25rem; }
  input[type="number"] {
    min-height: 44px;
    font-size: 1rem; /* >=16px: prevents iOS zoom-on-focus */
    -moz-appearance: textfield;
    appearance: textfield; /* drop spinners — awkward on touch; use slider or type */
  }
  input[type="number"]::-webkit-outer-spin-button,
  input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
  input[type="range"] { height: 40px; }
  input[type="range"]::-webkit-slider-thumb { width: 18px; height: 32px; margin-top: -12px; }
  input[type="range"]::-moz-range-thumb { width: 16px; height: 30px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}