/* ==========================================================================
   Abuz TDEE Calculator — "Metabolic readout"
   Phone-first. One typeface (IBM Plex Sans Arabic), used with precision.
   Boldness is spent in one place: the dark energy readout panel.
   ========================================================================== */

:root {
  /* Energy palette — warm, not cold */
  --ember: #ff6a00;        /* the one heat signal */
  --ember-deep: #c2440a;
  --ember-soft: rgba(255, 106, 0, 0.12);
  --ember-grad: linear-gradient(135deg, #ff8a2b 0%, #ff6a00 52%, #e85100 100%);
  --ember-grad-hover: linear-gradient(135deg, #ff7a14 0%, #f25e00 52%, #c2440a 100%);

  --paper: #faf7f2;        /* warm off-white */
  --paper-raised: #ffffff;
  --ink: #1b1714;          /* warm near-black */
  --ink-2: #2a231e;        /* readout panel surface */
  --ash: #8c8378;          /* warm muted text */
  --line: #e9e1d6;         /* warm hairline */

  /* Fuel-mix tones (natural food colors) */
  --protein: #e8553f;      /* meat / rose-red */
  --carbs:   #e7a020;      /* grain / gold */
  --fat:     #8a9a5b;      /* oil / olive */
  /* lighter variants for the dark readout */
  --protein-lit: #ff7a64;
  --carbs-lit:   #ffc24b;
  --fat-lit:     #b3c178;

  --radius: 18px;
  --radius-sm: 12px;
  --tap: 54px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --font: "IBM Plex Sans Arabic", system-ui, -apple-system, "Segoe UI", sans-serif;
}

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

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

body {
  margin: 0;
  font-family: var(--font);
  background: var(--paper);
  /* subtle warm grain of light from the top */
  background-image: radial-gradient(120% 60% at 50% -10%, rgba(255, 106, 0, 0.06), transparent 60%);
  background-attachment: fixed;
  color: var(--ink);
  line-height: 1.5;
  font-size: 16px;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  padding: env(safe-area-inset-top) env(safe-area-inset-right)
           env(safe-area-inset-bottom) env(safe-area-inset-left);
}

.is-hidden { display: none !important; }

/* Tabular, lining figures everywhere numbers matter */
input, .readout__value strong, .macro__val, .fuel { font-variant-numeric: tabular-nums; }

/* --------------------------------------------------------------------------
   Eyebrow — structural label used for form + goal sections
   -------------------------------------------------------------------------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ash);
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 3px;
  border-radius: 2px;
  background: var(--ember);
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.app {
  width: 100%;
  max-width: 460px;
  margin-inline: auto;
  padding: 24px 18px 48px;
}

/* --------------------------------------------------------------------------
   Top navigation bar
   -------------------------------------------------------------------------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--paper-raised);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 6px 22px -18px rgba(27, 23, 20, 0.5);
}
.topbar__inner {
  width: 100%;
  max-width: 460px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 18px;
}
.topbar__brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding-inline: 6px;
  text-decoration: none;
  border-radius: 10px;
}
.topbar__brand:focus-visible { outline: 2px solid var(--ember); outline-offset: 3px; }
.topbar__mark { width: 45px; height: 45px; fill: var(--ink); }
.topbar__name { display: none; }

.topbar__right { display: inline-flex; align-items: center; gap: 4px; }
.topbar__link {
  padding: 8px 13px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ash);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}
.topbar__link:hover { color: var(--ember); }
.topbar__link.is-active { color: var(--ember); background: var(--ember-soft); }
.topbar__link:focus-visible { outline: 2px solid var(--ember); outline-offset: 2px; }

.lang-btn { margin-inline-start: 4px; }

.lang-btn {
  min-width: 46px;
  height: 42px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper-raised);
  color: var(--ink);
  font-family: var(--font);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.lang-btn:hover { border-color: var(--ember); color: var(--ember); }
.lang-btn:active { transform: scale(0.96); }
.lang-btn:focus-visible { outline: 2px solid var(--ember); outline-offset: 2px; }

/* --------------------------------------------------------------------------
   Header (calculator hero)
   -------------------------------------------------------------------------- */
.header {
  text-align: center;
  padding: 2px 0 26px;
}

.brand { display: flex; justify-content: center; }
.brand__name {
  width: 238px;
  height: auto;
  fill: var(--ink);
}

.header__tagline {
  margin: 16px auto 0;
  max-width: 28ch;
  color: var(--ash);
  font-size: 15px;
  font-weight: 400;
}

/* --------------------------------------------------------------------------
   Form — the input console
   -------------------------------------------------------------------------- */
.form {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 1px 2px rgba(27, 23, 20, 0.03), 0 18px 40px -28px rgba(27, 23, 20, 0.30);
  padding: 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.form > .eyebrow { margin-bottom: 2px; }

.field { display: flex; flex-direction: column; gap: 9px; }

.field__label {
  font-weight: 600;
  font-size: 15px;
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
}
.field__hint { font-weight: 400; font-size: 13px; color: var(--ash); }

/* Inputs */
.input-group { position: relative; display: flex; align-items: center; }

input[type="number"], select {
  width: 100%;
  height: var(--tap);
  padding: 0 16px;
  font-family: inherit;
  font-size: 17px;
  font-weight: 500;
  color: var(--ink);
  background: var(--paper);
  border: 1.5px solid var(--line);
  border-radius: var(--radius-sm);
  transition: border-color 0.18s var(--ease), box-shadow 0.18s var(--ease), background 0.18s var(--ease);
  -webkit-appearance: none;
  appearance: none;
}
input[type="number"]:focus, select:focus {
  outline: none;
  background: var(--paper-raised);
  border-color: var(--ember);
  box-shadow: 0 0 0 4px var(--ember-soft);
}
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
input[type="number"] { -moz-appearance: textfield; }

.input-group__suffix {
  position: absolute;
  inset-inline-end: 50px;
  color: var(--ash);
  font-size: 14px;
  font-weight: 500;
  pointer-events: none;
}
.input-group input { padding-inline-end: 92px; }

/* Custom number steppers (native spinners are removed above) */
.stepper {
  position: absolute;
  inset-inline-end: 8px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.stepper__btn {
  width: 30px;
  height: 21px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--paper-raised);
  color: var(--ash);
  cursor: pointer;
  transition: border-color 0.15s var(--ease), color 0.15s var(--ease), background 0.15s var(--ease);
}
.stepper__btn:hover { border-color: var(--ember); color: var(--ember); }
.stepper__btn:active { background: var(--ember-soft); }
.stepper__btn:focus-visible { outline: 2px solid var(--ember); outline-offset: 1px; }
.stepper__btn::before {
  content: "";
  width: 6px;
  height: 6px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
}
.stepper__btn[data-step="up"]::before { transform: rotate(-135deg); margin-top: 3px; }
.stepper__btn[data-step="down"]::before { transform: rotate(45deg); margin-bottom: 3px; }

.select-wrap { position: relative; }
.select-wrap::after {
  content: "";
  position: absolute;
  inset-inline-end: 18px;
  top: 50%;
  width: 9px; height: 9px;
  border-right: 2px solid var(--ash);
  border-bottom: 2px solid var(--ash);
  transform: translateY(-65%) rotate(45deg);
  pointer-events: none;
}
select { padding-inline-end: 44px; }

/* --------------------------------------------------------------------------
   Segmented controls (sex, goal)
   -------------------------------------------------------------------------- */
.segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  padding: 4px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}
.segmented--goal { grid-template-columns: repeat(3, 1fr); }
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.segmented label {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 46px;
  padding: 6px 8px;
  border-radius: 9px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ash);
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.segmented input:checked + label {
  background: var(--ember-grad);
  color: #fff;
  box-shadow: 0 4px 14px -4px var(--ember);
}
.segmented--goal input:checked + label { background: var(--ember-grad); color: #fff; box-shadow: 0 4px 14px -4px var(--ember); }
.segmented input:focus-visible + label { box-shadow: 0 0 0 3px var(--ember-soft); }

/* --------------------------------------------------------------------------
   Primary button
   -------------------------------------------------------------------------- */
.btn-primary {
  position: relative;
  width: 100%;
  min-height: 58px;
  margin-top: 4px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--ember-grad);
  color: #fff;
  font-family: inherit;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.01em;
  cursor: pointer;
  box-shadow: 0 10px 26px -10px var(--ember);
  transition: background 0.18s var(--ease), transform 0.05s var(--ease), box-shadow 0.18s var(--ease);
}
.btn-primary:hover { background: var(--ember-grad-hover); box-shadow: 0 12px 30px -10px var(--ember-deep); }
.btn-primary:active { transform: translateY(1px); }
.btn-primary:focus-visible { outline: none; box-shadow: 0 0 0 4px var(--ember-soft), 0 10px 26px -10px var(--ember); }

.form__error {
  margin: 0;
  color: var(--protein);
  font-size: 14px;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   Results
   -------------------------------------------------------------------------- */
.results {
  margin-top: 30px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  animation: rise 0.45s var(--ease) both;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

.goal-select { display: flex; flex-direction: column; gap: 10px; }

/* The one bold panel — energy readout */
.readout {
  position: relative;
  overflow: hidden;
  padding: 26px 22px 22px;
  border-radius: var(--radius);
  background: var(--ink-2);
  color: var(--paper);
  box-shadow: 0 24px 50px -24px rgba(27, 23, 20, 0.75);
}
/* ember glow rising behind the number */
.readout::before {
  content: "";
  position: absolute;
  inset-inline-start: 50%;
  top: -40%;
  width: 320px; height: 320px;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(255, 106, 0, 0.30), transparent 62%);
  pointer-events: none;
}
.readout > * { position: relative; }

/* Abuz "A" brand stamp — top corner, opposite the number */
.readout__mark {
  position: absolute;
  inset-inline-end: 22px;
  top: 22px;
  width: 56px;
  height: 56px;
  fill: var(--ember);
  opacity: 0.92;
  filter: drop-shadow(0 0 12px rgba(255, 106, 0, 0.45));
}

.readout__target {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: rgba(250, 247, 242, 0.62);
}
.readout__value {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 4px 0 8px;
  flex-wrap: wrap;
}
.readout__value strong {
  font-size: clamp(52px, 17vw, 68px);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--ember);
  text-shadow: 0 0 30px rgba(255, 106, 0, 0.35);
}
.readout__unit { font-size: 15px; font-weight: 500; color: rgba(250, 247, 242, 0.72); }

.readout__meta {
  margin: 0 0 22px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(250, 247, 242, 0.6);
}
.readout__note { color: var(--ember); font-weight: 600; }
.readout__sep { opacity: 0.4; }

/* Signature: fuel-mix bar */
.fuel { display: flex; flex-direction: column; gap: 14px; }
.fuel__bar {
  display: flex;
  height: 12px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(250, 247, 242, 0.08);
}
.fuel__seg {
  height: 100%;
  width: 33%;
  transition: width 0.5s var(--ease);
}
.fuel__seg--protein { background: var(--protein-lit); }
.fuel__seg--carbs   { background: var(--carbs-lit); }
.fuel__seg--fat     { background: var(--fat-lit); }
/* thin separators between segments */
.fuel__seg + .fuel__seg { box-shadow: inset 1px 0 0 var(--ink-2); }
html[dir="rtl"] .fuel__seg + .fuel__seg { box-shadow: inset -1px 0 0 var(--ink-2); }

.fuel__legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.macro {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 12px;
  border-top: 2px solid;
}
.macro--protein { border-color: var(--protein-lit); }
.macro--carbs   { border-color: var(--carbs-lit); }
.macro--fat     { border-color: var(--fat-lit); }
.macro__name { font-size: 12px; font-weight: 500; color: rgba(250, 247, 242, 0.62); }
.macro__val  { font-size: 19px; font-weight: 700; color: var(--paper); }

.disclaimer {
  margin: 2px 0 0;
  font-size: 12px;
  color: var(--ash);
  text-align: center;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   FAQ page
   -------------------------------------------------------------------------- */
.page-head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 4px 2px 24px;
}
.page-title {
  margin: 0;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.page-intro { margin: 0; color: var(--ash); font-size: 15px; max-width: 42ch; }

.faq { display: flex; flex-direction: column; gap: 10px; }

.faq__item {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.faq__item[open] {
  border-color: var(--ember);
  box-shadow: 0 14px 34px -22px rgba(255, 106, 0, 0.55);
}

.faq__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  list-style: none;
  cursor: pointer;
  padding: 17px 18px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}
.faq__q::-webkit-details-marker { display: none; }
/* chevron */
.faq__q::after {
  content: "";
  flex: none;
  width: 9px; height: 9px;
  border-right: 2px solid var(--ash);
  border-bottom: 2px solid var(--ash);
  transform: rotate(45deg);
  transition: transform 0.25s var(--ease), border-color 0.2s var(--ease);
}
.faq__item[open] .faq__q::after {
  transform: rotate(-135deg);
  border-color: var(--ember);
}
.faq__q:hover { color: var(--ember); }

.faq__a {
  padding: 0 18px 20px;
  color: #5a534c;
  font-size: 15px;
  line-height: 1.85;
}

/* --------------------------------------------------------------------------
   Tablet / desktop — secondary target
   -------------------------------------------------------------------------- */
@media (min-width: 768px) {
  .app { max-width: 520px; padding-top: 40px; }
  .topbar__inner { max-width: 520px; }
  .form { padding: 28px 26px; }
  .header__tagline { font-size: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}