/* ═══════════════════════════════════════════════════════════
   calcyou.org – styles.css
   Brand: #085041 dark · #1D9E75 teal · #F1EFE8 off-white
   ═══════════════════════════════════════════════════════════ */

/* ── BRAND TOKENS ───────────────────────────────────────── */
:root {
  --cy-dark:       #085041;
  --cy-teal:       #1D9E75;
  --cy-light:      #5DCAA5;
  --cy-pale:       #9FE1CB;
  --cy-bg:         #E1F5EE;
  --cy-off-white:  #F1EFE8;
  --cy-ink:        #2C2C2A;
  --cy-muted:      #888780;
  --cy-border:     #D3D1C7;
  --cy-surface:    #ffffff;
  --cy-font:       system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --cy-font-mono:  "SF Mono", "Fira Code", monospace;
  --cy-fw-light:   300;
  --cy-fw-regular: 400;
  --cy-fw-medium:  500;
  --cy-fw-semi:    600;
  --cy-tracking-logo:  -0.04em;
  --cy-radius-sm:  7px;
  --cy-radius-md:  10px;
  --cy-radius-lg:  14px;
  --cy-radius-xl:  20px;
  --cy-bar-height: 4px;
  --cy-transition: 160ms ease;
  --cy-shadow-sm:  0 1px 3px rgba(8,80,65,.07), 0 1px 2px rgba(8,80,65,.05);
  --cy-shadow:     0 4px 16px rgba(8,80,65,.09), 0 2px 4px rgba(8,80,65,.05);
  --cy-shadow-lg:  0 12px 40px rgba(8,80,65,.12), 0 4px 8px rgba(8,80,65,.06);

  /* Layout */
  --sidebar-w: 260px;
  --header-h:  62px;

  /* Aliases for tool components */
  --bg:         var(--cy-off-white);
  --surface:    var(--cy-surface);
  --card:       var(--cy-surface);
  --card2:      var(--cy-bg);
  --border:     var(--cy-border);
  --border2:    var(--cy-pale);
  --accent:     var(--cy-teal);
  --accent-dim: rgba(29,158,117,.1);
  --accent-glow:rgba(29,158,117,.25);
  --text:       var(--cy-ink);
  --text2:      var(--cy-muted);
  --text3:      #b5b3ab;
  --green:      #059669;
  --green-dim:  rgba(5,150,105,.1);
  --amber:      #d97706;
  --amber-dim:  rgba(217,119,6,.1);
  --red:        #dc2626;
  --red-dim:    rgba(220,38,38,.1);
  --purple:     #7c3aed;
  --ad-bg:      var(--cy-bg);
  --ad-border:  var(--cy-pale);
  --mono:       var(--cy-font-mono);
  --sans:       var(--cy-font);
  --display:    var(--cy-font);
  --r:          var(--cy-radius-md);
  --r-lg:       var(--cy-radius-lg);
  --r-xl:       var(--cy-radius-xl);
}

/* ── RESET ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--cy-font);
  background: var(--cy-off-white);
  color: var(--cy-ink);
  min-height: 100vh;
  overflow-x: hidden;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

/* ── HEADER / NAVBAR ────────────────────────────────────── */
.header {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: var(--cy-dark);
  border-bottom: none;
  display: flex; align-items: center;
  padding: 0 1.25rem; gap: 1rem; z-index: 200;
}
/* Teal top accent bar */
.header::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: var(--cy-bar-height);
  background: var(--cy-teal);
}

.header-spacer { flex: 1; }

.menu-btn {
  display: none;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  color: rgba(255,255,255,.75);
  cursor: pointer; border-radius: var(--cy-radius-sm);
  padding: .45rem .65rem; font-size: 1.05rem; transition: all .15s;
}
.menu-btn:hover { background: rgba(255,255,255,.14); color: #fff; }

/* ── HOME / DASHBOARD BUTTON ───────────────────────────── */
.dash-home-btn {
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  color: rgba(255,255,255,.80);
  cursor: pointer; border-radius: var(--cy-radius-sm);
  padding: .42rem .58rem; font-size: 1.1rem;
  text-decoration: none; line-height: 1;
  transition: background .15s, color .15s;
  flex-shrink: 0;
}
.dash-home-btn:hover { background: rgba(255,255,255,.18); color: #fff; }

/* ── CSS LOGO ───────────────────────────────────────────── */
.cy-logo {
  display: inline-flex; align-items: baseline; gap: 0;
  text-decoration: none; line-height: 1;
  font-family: var(--cy-font); user-select: none;
}
.cy-logo__calc {
  font-size: 1.375rem; font-weight: var(--cy-fw-medium);
  color: #fff; letter-spacing: var(--cy-tracking-logo); line-height: 1;
  transition: color var(--cy-transition);
}
.cy-logo__you {
  font-size: 1.375rem; font-weight: var(--cy-fw-light);
  color: rgba(255,255,255,.38); letter-spacing: var(--cy-tracking-logo); line-height: 1;
  transition: color var(--cy-transition);
}
.cy-logo__dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--cy-light); align-self: center;
  margin-left: 3px; margin-bottom: 4px; flex-shrink: 0;
}
.cy-logo:hover .cy-logo__calc { color: var(--cy-pale); }
.cy-logo:hover .cy-logo__you  { color: rgba(255,255,255,.55); }

/* ── LANGUAGE SWITCHER ──────────────────────────────────── */
.lang-switcher { position: relative; }
.lang-btn {
  display: flex; align-items: center; gap: .4rem;
  padding: .4rem .75rem;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--cy-radius-sm); cursor: pointer;
  font-size: .8rem; color: rgba(255,255,255,.75);
  transition: all .15s; font-family: var(--cy-font);
}
.lang-btn:hover { background: rgba(255,255,255,.14); color: #fff; }
.lang-flag  { font-size: 1rem; }
.lang-code  { font-family: var(--cy-font-mono); font-size: .72rem; font-weight: 600; letter-spacing: .05em; }
.lang-arrow { font-size: .6rem; color: rgba(255,255,255,.4); }
.lang-dropdown {
  position: absolute; top: calc(100% + 8px); right: 0;
  background: var(--cy-surface); border: 1px solid var(--cy-border);
  border-radius: var(--cy-radius-lg); padding: .4rem; min-width: 260px; max-width: 300px;
  z-index: 300; box-shadow: var(--cy-shadow-lg); display: none;
}
.lang-dropdown.open { display: flex; flex-direction: column; }
/* Legacy lang-opt (kept for fallback) */
.lang-opt {
  display: flex; align-items: center; gap: .6rem;
  padding: .48rem .7rem; border-radius: 8px;
  cursor: pointer; font-size: .83rem; color: var(--cy-muted); transition: all .12s;
}
.lang-opt:hover  { background: var(--cy-bg); color: var(--cy-ink); }
.lang-opt.active { color: var(--cy-teal); font-weight: 600; background: rgba(29,158,117,.08); }
.lang-opt .lf { font-size: 1.1rem; }
.lang-opt .ln { flex: 1; }
.lang-opt .lc { font-family: var(--cy-font-mono); font-size: .65rem; color: var(--cy-border); }
/* New dropdown sections */
.lang-section-label {
  font-size: .65rem; font-weight: 700; letter-spacing: .07em;
  color: var(--cy-muted); padding: .2rem .5rem .35rem; text-transform: uppercase;
}
.lang-top10 { padding: .3rem .3rem 0; }
.lang-chips { display: flex; flex-wrap: wrap; gap: .3rem; padding-bottom: .4rem; }
.lang-chip {
  background: var(--cy-bg); border: 1px solid var(--cy-border);
  border-radius: 6px; padding: .25rem .45rem;
  font-size: .75rem; cursor: pointer; color: var(--cy-ink);
  transition: all .12s; white-space: nowrap;
}
.lang-chip:hover { background: var(--cy-teal); color: #fff; border-color: var(--cy-teal); }
.lang-chip.active { background: var(--cy-teal); color: #fff; border-color: var(--cy-teal); font-weight: 600; }
.lang-search-wrap { padding: .3rem; border-top: 1px solid var(--cy-border); }
.lang-search {
  width: 100%; box-sizing: border-box;
  background: var(--cy-bg); border: 1px solid var(--cy-border);
  border-radius: 8px; padding: .4rem .6rem;
  font-size: .82rem; color: var(--cy-ink); outline: none;
}
.lang-search:focus { border-color: var(--cy-teal); }
.lang-all {
  max-height: 220px; overflow-y: auto; padding: .2rem;
  border-top: 1px solid var(--cy-border);
}
.lang-all::-webkit-scrollbar { width: 4px; }
.lang-all::-webkit-scrollbar-thumb { background: var(--cy-border); border-radius: 4px; }
.lang-row {
  display: flex; align-items: center; gap: .5rem;
  padding: .38rem .6rem; border-radius: 7px;
  cursor: pointer; font-size: .8rem; color: var(--cy-muted); transition: all .12s;
}
.lang-row:hover  { background: var(--cy-bg); color: var(--cy-ink); }
.lang-row.active { color: var(--cy-teal); font-weight: 600; background: rgba(29,158,117,.08); }
.lang-row .lf { font-size: 1rem; flex-shrink: 0; }
.lang-row .ln { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lang-row .lc { font-family: var(--cy-font-mono); font-size: .62rem; color: var(--cy-border); white-space: nowrap; }

/* ── LAYOUT ─────────────────────────────────────────────── */
.layout { display: flex; padding-top: var(--header-h); min-height: 100vh; }
#overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(8,80,65,.4); z-index: 140; backdrop-filter: blur(3px);
}

/* ── SIDEBAR ────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w); background: var(--cy-surface);
  border-right: 1px solid var(--cy-border);
  position: fixed; top: var(--header-h); left: 0; bottom: 0;
  overflow-y: auto; z-index: 150;
  padding: .75rem 0 2rem;
  transition: transform .3s cubic-bezier(.4,0,.2,1);
}
.sidebar::-webkit-scrollbar       { width: 3px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--cy-pale); border-radius: 2px; }
.cat-label {
  font-size: .62rem; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--cy-pale);
  padding: 1.1rem 1.25rem .4rem;
}
.tool-link {
  display: flex; align-items: center; gap: .65rem;
  padding: .55rem 1.25rem; cursor: pointer;
  border-left: 3px solid transparent;
  font-size: .83rem; color: var(--cy-muted);
  transition: all .15s; user-select: none;
  text-decoration: none;
}
.tool-link:hover  { background: var(--cy-bg); color: var(--cy-ink); }
.tool-link.active {
  border-left-color: var(--cy-teal);
  background: rgba(29,158,117,.08);
  color: var(--cy-teal); font-weight: 600;
}
.t-icon {
  width: 28px; height: 28px;
  background: var(--cy-bg);
  border-radius: 8px; display: flex; align-items: center;
  justify-content: center; font-size: .82rem; flex-shrink: 0;
}
.tool-link.active .t-icon { background: rgba(29,158,117,.12); }

/* ── MAIN ───────────────────────────────────────────────── */
.main { margin-left: var(--sidebar-w); flex: 1; padding: 2rem 2.25rem 5rem; min-width: 0; }

/* ── TOOL SECTIONS ──────────────────────────────────────── */
.tool-section { display: none; max-width: 980px; animation: fadeSlide .25s ease; }
.tool-section.active { display: block; }
@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.tool-header   { margin-bottom: 1.75rem; }
.tool-badge {
  display: inline-flex; align-items: center; gap: .35rem;
  padding: .25rem .85rem; border-radius: 99px;
  font-size: .62rem; font-weight: 700; letter-spacing: .1em;
  background: rgba(29,158,117,.1); color: var(--cy-teal);
  border: 1px solid rgba(29,158,117,.25); margin-bottom: .6rem;
  text-transform: uppercase;
}
.tool-title {
  font-size: 1.75rem; font-weight: 700;
  color: var(--cy-ink); line-height: 1.2;
  margin-bottom: .4rem; letter-spacing: -.02em;
}
.tool-desc { font-size: .88rem; color: var(--cy-muted); line-height: 1.65; }

/* ── AD UNITS ───────────────────────────────────────────── */
.ad-banner {
  width: 100%; min-height: 90px; margin-bottom: 1.75rem;
  background: var(--cy-bg); border: 1px dashed var(--cy-pale);
  border-radius: var(--cy-radius-lg); overflow: hidden;
  display: flex; align-items: center; justify-content: center; position: relative;
}
.ad-banner::before {
  content: 'Anzeige'; position: absolute; top: 6px; left: 12px;
  font-size: .55rem; color: var(--cy-pale);
  letter-spacing: .1em; text-transform: uppercase; pointer-events: none;
}
.ad-banner ins { display: block !important; width: 100%; }
.ad-sidebar {
  width: 100%; min-height: 250px;
  background: var(--cy-bg); border: 1px dashed var(--cy-pale);
  border-radius: var(--cy-radius-lg); overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  position: relative; margin-top: 1.25rem;
}
.ad-sidebar::before {
  content: 'Anzeige'; position: absolute; top: 6px; left: 12px;
  font-size: .55rem; color: var(--cy-pale);
  letter-spacing: .1em; text-transform: uppercase; pointer-events: none;
}
.ad-sidebar ins { display: block !important; width: 100%; }

/* ── GRID ───────────────────────────────────────────────── */
.g2  { display: grid; grid-template-columns: 1fr 1fr;     gap: 1.4rem; }
.g3  { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem;   }
.g2l { display: grid; grid-template-columns: 1.45fr 1fr;  gap: 1.4rem; }

/* ── CARD ───────────────────────────────────────────────── */
.card {
  background: var(--cy-surface);
  border: 1px solid var(--cy-border);
  border-radius: var(--cy-radius-xl);
  padding: 1.5rem;
  box-shadow: var(--cy-shadow-sm);
}
.card-title {
  font-size: .67rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .12em;
  color: var(--cy-pale); margin-bottom: 1rem;
}

/* ── FORM ELEMENTS ──────────────────────────────────────── */
.fg { margin-bottom: .95rem; }
label {
  display: block; font-size: .8rem; color: var(--cy-muted);
  margin-bottom: .35rem; font-weight: var(--cy-fw-medium);
}
input[type=number], input[type=text], input[type=date], select, textarea {
  width: 100%; padding: .65rem .9rem;
  background: var(--cy-off-white); border: 1px solid var(--cy-border);
  border-radius: var(--cy-radius-md); color: var(--cy-ink);
  font-family: var(--cy-font); font-size: .88rem;
  transition: border-color .15s, box-shadow .15s; outline: none;
  -moz-appearance: textfield;
}
input::-webkit-outer-spin-button, input::-webkit-inner-spin-button { -webkit-appearance: none; }
input:focus, select:focus, textarea:focus {
  border-color: var(--cy-teal);
  box-shadow: 0 0 0 3px rgba(29,158,117,.12);
  background: var(--cy-surface);
}
select option { background: var(--cy-surface); color: var(--cy-ink); }
textarea      { resize: vertical; min-height: 80px; }
input[type=range] {
  width: 100%; height: 5px; appearance: none;
  background: var(--cy-pale); border-radius: 3px;
  cursor: pointer; border: none; padding: 0; outline: none;
}
input[type=range]::-webkit-slider-thumb {
  appearance: none; width: 18px; height: 18px; border-radius: 50%;
  background: var(--cy-teal); border: 3px solid white;
  box-shadow: 0 0 0 1px var(--cy-teal), 0 2px 6px rgba(29,158,117,.3);
}
input[type=color]  { padding: .2rem; height: 42px; cursor: pointer; border-radius: var(--cy-radius-md); }
.suf-wrap { position: relative; }
.suf {
  position: absolute; right: .8rem; top: 50%; transform: translateY(-50%);
  color: var(--cy-border); font-family: var(--cy-font-mono); font-size: .75rem; pointer-events: none;
}
.suf-wrap input { padding-right: 2.75rem; }

/* ── BUTTONS ────────────────────────────────────────────── */
.btn {
  padding: .68rem 1.5rem; border-radius: var(--cy-radius-md); border: none;
  cursor: pointer; font-family: var(--cy-font); font-weight: var(--cy-fw-semi);
  font-size: .86rem; transition: all var(--cy-transition);
}
.btn-primary {
  background: var(--cy-teal); color: #fff;
  box-shadow: 0 2px 8px rgba(29,158,117,.3);
}
.btn-primary:hover {
  background: var(--cy-dark); transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(8,80,65,.25);
}
.btn-secondary {
  background: var(--cy-bg); color: var(--cy-ink);
  border: 1px solid var(--cy-border);
}
.btn-secondary:hover { background: var(--cy-pale); color: var(--cy-dark); }
.btn-sm  { padding: .4rem .9rem; font-size: .76rem; }
.btn-w   { width: 100%; margin-top: .5rem; }
.btn-row { display: flex; gap: .6rem; margin-top: .5rem; flex-wrap: wrap; }

/* ── RESULTS ────────────────────────────────────────────── */
.res-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px,1fr)); gap: .9rem; }
.res-item { text-align: center; }
.res-label {
  font-size: .62rem; color: var(--cy-pale);
  text-transform: uppercase; letter-spacing: .12em;
  margin-bottom: .3rem; font-weight: 700;
}
.res-val { font-family: var(--cy-font-mono); font-size: 1.3rem; font-weight: 700; color: var(--cy-teal); line-height: 1.2; }
.res-val.sm  { font-size: .95rem; }
.res-val.lg  { font-size: 1.9rem; }
.res-val.xl  { font-size: 2.4rem; }
.res-val.grn { color: var(--green); }
.res-val.amb { color: var(--amber); }
.res-val.red { color: var(--red);   }
.res-val.pur { color: var(--purple);}

/* ── TABLE ──────────────────────────────────────────────── */
.tbl-wrap { border-radius: var(--cy-radius-md); border: 1px solid var(--cy-border); overflow: hidden; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .8rem; }
th {
  background: var(--cy-bg); color: var(--cy-muted); font-weight: 700;
  font-size: .63rem; text-transform: uppercase; letter-spacing: .1em;
  padding: .65rem .95rem; text-align: left; white-space: nowrap;
}
td { padding: .55rem .95rem; border-top: 1px solid var(--cy-border); color: var(--cy-ink); white-space: nowrap; }
tr:hover td { background: var(--cy-bg); }
.tbl-scroll { max-height: 360px; overflow-y: auto; }
.tbl-scroll::-webkit-scrollbar       { width: 4px; }
.tbl-scroll::-webkit-scrollbar-thumb { background: var(--cy-pale); border-radius: 3px; }

/* ── CHART WRAPPERS ─────────────────────────────────────── */
.ch     { position: relative; margin-top: 1.1rem; }
.ch-200 { height: 200px; }
.ch-240 { height: 240px; }
.ch-280 { height: 280px; }

/* ── MISC ───────────────────────────────────────────────── */
.hr { height: 1px; background: var(--cy-border); margin: 1.1rem 0; }
.seg {
  display: flex; background: var(--cy-bg); border: 1px solid var(--cy-border);
  border-radius: var(--cy-radius-md); padding: 3px; gap: 3px;
  margin-bottom: 1rem; flex-wrap: wrap;
}
.seg-btn {
  flex: 1; min-width: 60px; padding: .45rem .5rem; border: none; background: none;
  color: var(--cy-muted); cursor: pointer;
  border-radius: calc(var(--cy-radius-md) - 3px);
  font-size: .8rem; transition: all .15s;
  font-family: var(--cy-font); font-weight: var(--cy-fw-medium);
}
.seg-btn.active {
  background: var(--cy-teal); color: #fff; font-weight: var(--cy-fw-semi);
  box-shadow: 0 2px 8px rgba(29,158,117,.3);
}
.info-box {
  background: rgba(29,158,117,.08); border: 1px solid rgba(29,158,117,.2);
  border-radius: var(--cy-radius-md); padding: .7rem 1rem;
  font-size: .8rem; color: var(--cy-muted); margin-bottom: .9rem;
}
.info-box strong { color: var(--cy-teal); }
.warn-box {
  background: var(--amber-dim); border: 1px solid rgba(217,119,6,.2);
  border-radius: var(--cy-radius-md); padding: .7rem 1rem;
  font-size: .8rem; color: var(--cy-muted); margin-bottom: .9rem;
}
.warn-box strong { color: var(--amber); }

/* ── BMI SCALE ──────────────────────────────────────────── */
.bmi-scale {
  height: 10px; border-radius: 5px;
  background: linear-gradient(to right, #3b82f6 0%, #5DCAA5 20%, #1D9E75 42%, #d97706 68%, #dc2626 100%);
  position: relative; margin: 1rem 0 1.5rem;
}
.bmi-needle {
  position: absolute; top: -9px; width: 3px; height: 28px; background: var(--cy-ink);
  border-radius: 2px; transform: translateX(-50%);
  transition: left .6s cubic-bezier(.34,1.56,.64,1); box-shadow: 0 0 6px rgba(0,0,0,.15);
}

/* ── FRACTION ───────────────────────────────────────────── */
.frac {
  display: inline-flex; flex-direction: column; align-items: center;
  font-family: var(--cy-font-mono); font-size: 1.5rem; font-weight: 600;
}
.fn { border-bottom: 2.5px solid currentColor; padding: 0 .35rem; }
.fd { padding: 0 .35rem; }
.op-sign { font-size: 2rem; color: var(--amber); font-weight: 700; }
.eq-sign { font-size: 2rem; color: var(--cy-border); }

/* ── PASSWORD ───────────────────────────────────────────── */
.pwd-out {
  font-family: var(--cy-font-mono); font-size: .95rem; letter-spacing: .04em;
  padding: .85rem 3rem .85rem 1rem;
  background: var(--cy-off-white); border: 1px solid var(--cy-border);
  border-radius: var(--cy-radius-md); color: var(--cy-teal);
  word-break: break-all; min-height: 52px; position: relative;
  margin-bottom: .7rem; cursor: pointer; transition: border-color .2s, box-shadow .2s;
}
.pwd-out:hover { border-color: var(--cy-teal); box-shadow: 0 0 0 3px rgba(29,158,117,.1); }
.str-bar  { height: 6px; border-radius: 3px; background: var(--cy-border); margin: .5rem 0; overflow: hidden; }
.str-fill { height: 100%; border-radius: 3px; transition: width .3s, background .3s; }
.chk-row  { display: flex; align-items: center; gap: .5rem; margin-bottom: .55rem; }
.chk-row input[type=checkbox] { width: 16px; height: 16px; accent-color: var(--cy-teal); cursor: pointer; }
.chk-row label { margin: 0; cursor: pointer; font-size: .82rem; }
.copy-hint { font-size: .7rem; color: var(--cy-border); text-align: right; margin-bottom: .3rem; }

/* ── CO2 ────────────────────────────────────────────────── */
.co2-bw { margin: .5rem 0; }
.co2-bl { display: flex; justify-content: space-between; font-size: .76rem; color: var(--cy-muted); margin-bottom: .3rem; }
.co2-b  { height: 7px; background: var(--cy-bg); border-radius: 4px; overflow: hidden; }
.co2-bf { height: 100%; border-radius: 4px; background: var(--cy-teal); transition: width .5s ease; }

/* ── COLOR SWATCH ───────────────────────────────────────── */
.swatch {
  width: 100%; height: 72px; border-radius: var(--cy-radius-md);
  border: 1px solid var(--cy-border); transition: background .3s;
}

/* ── THEME TOGGLE BUTTON ────────────────────────────────── */
.theme-btn {
  display: flex; align-items: center; justify-content: center;
  width: 34px; height: 34px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--cy-radius-sm); cursor: pointer;
  color: rgba(255,255,255,.75); transition: all .15s;
  flex-shrink: 0;
}
.theme-btn:hover { background: rgba(255,255,255,.16); color: #fff; }
.theme-btn svg   { display: block; }

/* ── SMOOTH THEME TRANSITION ─────────────────────────────  */
html { transition: background-color .25s, color .25s; }
*, *::before, *::after { transition: background-color .25s, border-color .2s; }
/* Exclude transitions that break animations */
.btn, .btn-primary, .btn-secondary, .lang-btn, .theme-btn,
.tool-link, .cy-logo__calc, .cy-logo__you,
.bmi-needle, .co2-bf, .str-fill { transition: unset; }
.btn           { transition: all var(--cy-transition); }
.btn-primary   { transition: background var(--cy-transition), transform var(--cy-transition), box-shadow var(--cy-transition); }
.btn-secondary { transition: background var(--cy-transition), color var(--cy-transition); }
.lang-btn      { transition: background .15s, color .15s; }
.theme-btn     { transition: background .15s, color .15s; }
.tool-link     { transition: background .15s, color .15s, border-color .15s; }
.cy-logo__calc { transition: color var(--cy-transition); }
.cy-logo__you  { transition: color var(--cy-transition); }
.bmi-needle    { transition: left .6s cubic-bezier(.34,1.56,.64,1); }
.co2-bf        { transition: width .5s ease; }
.str-fill      { transition: width .3s, background .3s; }

/* ── DARK MODE TOKENS ────────────────────────────────────── */
/* Forced dark  →  data-theme="dark" on <html> */
[data-theme="dark"] {
  --cy-off-white:  #0d1c18;
  --cy-surface:    #122b24;
  --cy-ink:        #e8e6e0;
  --cy-muted:      #7a8c86;
  --cy-border:     #1f3d34;
  --cy-bg:         #0f2820;
  --cy-shadow-sm:  0 1px 3px rgba(0,0,0,.35), 0 1px 2px rgba(0,0,0,.2);
  --cy-shadow:     0 4px 16px rgba(0,0,0,.45), 0 2px 4px rgba(0,0,0,.25);
  --cy-shadow-lg:  0 12px 40px rgba(0,0,0,.55), 0 4px 8px rgba(0,0,0,.3);
  --text3:         #3d5c52;
}

/* System dark  →  OS dark + no forced-light  */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --cy-off-white:  #0d1c18;
    --cy-surface:    #122b24;
    --cy-ink:        #e8e6e0;
    --cy-muted:      #7a8c86;
    --cy-border:     #1f3d34;
    --cy-bg:         #0f2820;
    --cy-shadow-sm:  0 1px 3px rgba(0,0,0,.35), 0 1px 2px rgba(0,0,0,.2);
    --cy-shadow:     0 4px 16px rgba(0,0,0,.45), 0 2px 4px rgba(0,0,0,.25);
    --cy-shadow-lg:  0 12px 40px rgba(0,0,0,.55), 0 4px 8px rgba(0,0,0,.3);
    --text3:         #3d5c52;
  }
}

/* Range thumb: use surface color for the inner ring in dark mode */
[data-theme="dark"] input[type=range]::-webkit-slider-thumb,
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) input[type=range]::-webkit-slider-thumb {
    border-color: var(--cy-surface);
  }
}

/* ── RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 860px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); box-shadow: var(--cy-shadow-lg); }
  .main { margin-left: 0; padding: 1.25rem 1rem 4rem; }
  .menu-btn { display: block; }
  .g2, .g3, .g2l { grid-template-columns: 1fr; }
  .res-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .tool-title { font-size: 1.4rem; }
  .lang-code  { display: none; }
}