/* ============================================================
   Eye Movement Angle Calculator — Stylesheet
   Sits alongside css/style.css which provides:
     --light-accent, --main-accent, --black, --white,
     body, .container, header, footer base styles.
   ============================================================ */

/* Local variable aliases */
.container {
  --bg:          #f0f4ff;
  --paper:       var(--white, #ffffff);
  --ink:         var(--black, #000000);
  --ink-light:   #555555;
  --ink-faint:   #aaaaaa;
  --accent:      var(--main-accent, #1734c2);
  --accent-mid:  #5b78f0;
  --accent-soft: #dde4fb;
  --rule:        #d0d8f0;
}

/* ── Page intro ────────────────────────────────────────────── */
.container h1 {
  margin: 1.5rem 0 0.5rem;
}

.container > p {
  margin-bottom: 1.5rem;
  color: #444;
}

/* ── Mode Toggle ───────────────────────────────────────────── */
.mode-toggle {
  display: flex;
  margin-bottom: 20px;
  border-radius: 5px;
  overflow: hidden;
  width: fit-content;
  border: 2px solid var(--main-accent);
}

.mode-btn {
  padding: 10px 22px;
  font-family: Arial, sans-serif;
  font-size: 14px;
  font-weight: bold;
  cursor: pointer;
  border: none;
  background: var(--white);
  color: var(--main-accent);
  transition: background-color 0.2s, color 0.2s;
}

.mode-btn.active {
  background: var(--main-accent);
  color: var(--white);
}

.mode-btn:not(.active):hover {
  background: var(--accent-soft);
}

/* ── Input Panels ──────────────────────────────────────────── */
.calc-panel {
  background: var(--white);
  border: 1px solid var(--rule);
  border-radius: 5px;
  padding: 28px;
  margin-bottom: 20px;
  display: none;
  box-shadow: 0 2px 6px rgba(23, 52, 194, 0.07);
}

.calc-panel.active {
  display: block;
}

.panel-label {
  font-size: 13px;
  font-weight: bold;
  color: var(--ink-light);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule);
}

/* ── Form Layout ───────────────────────────────────────────── */
.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* Override site label styles inside the calculator */
.calc-panel label,
.field > label {
  font-size: 13px;
  font-weight: bold;
  color: var(--black);
  text-transform: none;
  letter-spacing: normal;
}

/* ── Input Wrap ────────────────────────────────────────────── */
.input-wrap {
  display: flex;
  align-items: stretch;
  border: 1px solid #bbc5e8;
  border-radius: 5px;
  background: var(--white);
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.input-wrap:focus-within {
  border-color: var(--main-accent);
  box-shadow: 0 0 0 3px rgba(23, 52, 194, 0.12);
}

/* Dashed border when showing placeholder as a default value */
.input-wrap:has(input:placeholder-shown) {
  border-style: dashed;
}

.input-wrap input[type="number"] {
  flex: 1;
  padding: 10px 12px;
  font-family: Arial, sans-serif;
  font-size: 16px;
  border: none;
  background: transparent;
  color: var(--black);
  outline: none;
  -moz-appearance: textfield;
}

.input-wrap input[type="number"]::-webkit-outer-spin-button,
.input-wrap input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
}

/* Italic style = acting as a default (placeholder shown) */
.input-wrap input[type="number"]:placeholder-shown {
  color: var(--ink-light);
  font-style: italic;
}

/* ── Unit Toggle ───────────────────────────────────────────── */
.unit-toggle {
  display: flex;
  border-left: 1px solid #bbc5e8;
}

.unit-opt {
  padding: 0 12px;
  font-size: 13px;
  font-weight: bold;
  cursor: pointer;
  background: transparent;
  border: none;
  color: var(--ink-light);
  font-family: Arial, sans-serif;
  transition: background-color 0.15s, color 0.15s;
}

.unit-opt.active {
  background: var(--main-accent);
  color: var(--white);
}

/* ── Aspect Ratio Cards ────────────────────────────────────── */
.ratio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 10px;
  margin-top: 6px;
}

.ratio-card {
  position: relative;
}

.ratio-card input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.ratio-card label {
  display: flex;
  flex-direction: column;
  padding: 10px 12px;
  border: 1px solid #bbc5e8;
  border-radius: 5px;
  cursor: pointer;
  background: var(--bg);
  transition: background-color 0.15s, border-color 0.15s;
  /* Reset site-level label overrides */
  text-transform: none;
  letter-spacing: normal;
  color: var(--black);
  font-size: 13px;
}

.ratio-card .ratio-val {
  font-size: 15px;
  font-weight: bold;
  color: var(--black);
  margin-bottom: 2px;
}

.ratio-card .ratio-desc {
  font-size: 11px;
  color: var(--ink-light);
  line-height: 1.4;
}

.ratio-card input:checked + label {
  background: var(--main-accent);
  border-color: var(--main-accent);
  color: var(--white);
}

.ratio-card input:checked + label .ratio-val,
.ratio-card input:checked + label .ratio-desc {
  color: var(--white);
}

.ratio-card label:hover {
  border-color: var(--main-accent);
  background: var(--accent-soft);
}

.ratio-card input:checked + label:hover {
  background: var(--main-accent);
}

/* ── Custom Ratio Card ─────────────────────────────────────── */
.ratio-card--custom label {
  gap: 6px;
}

.custom-inputs {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 2px;
}

.custom-inputs input[type="number"] {
  width: 38px;
  padding: 4px 6px;
  font-family: Arial, sans-serif;
  font-size: 13px;
  font-weight: bold;
  border: 1px solid #bbc5e8;
  border-radius: 3px;
  background: var(--white);
  color: var(--black);
  outline: none;
  text-align: center;
  -moz-appearance: textfield;
}

.custom-inputs input[type="number"]::-webkit-outer-spin-button,
.custom-inputs input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
}

.custom-inputs input[type="number"]:focus {
  border-color: var(--main-accent);
}

.ratio-card--custom input:checked + label .custom-inputs input[type="number"] {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
  color: white;
}

.ratio-card--custom input:checked + label .custom-inputs input[type="number"]::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.custom-sep {
  font-size: 15px;
  font-weight: bold;
  color: var(--ink-light);
}

.ratio-card--custom input:checked + label .custom-sep {
  color: rgba(255, 255, 255, 0.8);
}

/* ── Calculate Button — matches site's .buy-button ─────────── */
.calc-btn {
  background: var(--main-accent);
  color: white;
  border: none;
  padding: 1rem 2rem;
  border-radius: 5px;
  font-weight: bold;
  font-size: 1.1rem;
  font-family: Arial, sans-serif;
  cursor: pointer;
  width: 100%;
  margin-top: 12px;
  transition: background-color 0.3s ease;
}

.calc-btn:hover {
  background-color: #2d4bd3;
}

.calc-btn:active {
  filter: brightness(0.95);
}

/* ── Validation ────────────────────────────────────────────── */
.field-error {
  font-size: 12px;
  color: #dc3545;
  display: none;
}

.field.error .input-wrap {
  border-color: #dc3545;
  box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
}

.field.error .field-error {
  display: block;
}

.error-msg {
  font-size: 13px;
  color: #dc3545;
  padding: 10px 14px;
  background: #fdecea;
  border-left: 3px solid #dc3545;
  border-radius: 3px;
  display: none;
  margin-top: 12px;
}

.error-msg.visible {
  display: block;
}

/* ── Results Panel ─────────────────────────────────────────── */
.calc-results {
  display: none;
  background: var(--white);
  border: 1px solid var(--rule);
  border-radius: 5px;
  margin-bottom: 20px;
  box-shadow: 0 2px 6px rgba(23, 52, 194, 0.07);
  overflow: hidden;
}

.calc-results.visible {
  display: block;
}

.results-header {
  background: var(--main-accent);
  color: var(--white);
  padding: 12px 24px;
  font-size: 13px;
  font-weight: bold;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.results-header span:last-child {
  font-weight: normal;
  opacity: 0.75;
  font-size: 12px;
}

/* ── Results group label (separates outer / inner rows) ─────── */
.results-group-label {
  padding: 8px 24px;
  font-size: 12px;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--white);
  background: var(--main-accent);
  border-top: 1px solid rgba(255,255,255,0.15);
}

.results-group-label--inner {
  background: var(--accent-mid);
  font-size: 11px;
  opacity: 0.95;
}

/* ── Outer results grid ────────────────────────────────────── */
.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  border-bottom: 1px solid var(--rule);
}

.result-cell {
  padding: 20px 24px;
  border-right: 1px solid var(--rule);
}

.result-cell:last-child {
  border-right: none;
}

.result-label {
  font-size: 12px;
  font-weight: bold;
  text-transform: uppercase;
  color: var(--ink-light);
  margin-bottom: 6px;
  letter-spacing: 0.04em;
}

.result-val {
  font-size: 38px;
  font-weight: bold;
  line-height: 1;
  color: var(--black);
}

.result-val sup {
  font-size: 18px;
  font-weight: normal;
  color: var(--ink-light);
  margin-left: 2px;
}

.result-val.accent {
  color: var(--main-accent);
}

.result-note {
  font-size: 12px;
  color: var(--ink-faint);
  margin-top: 5px;
  line-height: 1.4;
}

/* ── Inner results grid (30–70) — subtler ──────────────────── */
.results-grid--inner {
  background: #f7f8ff;
  border-bottom: 1px solid var(--rule);
}

.result-cell--inner {
  padding: 14px 24px;
  border-right: 1px solid var(--rule);
  opacity: 0.85;
}

.result-cell--inner:last-child {
  border-right: none;
}

.result-val--inner {
  font-size: 28px;
  font-weight: bold;
  line-height: 1;
  color: var(--accent-mid);
}

.result-val--inner sup {
  font-size: 14px;
  font-weight: normal;
  color: var(--accent-mid);
  opacity: 0.7;
  margin-left: 2px;
}

/* ── SVG Diagram ───────────────────────────────────────────── */
.diagram-wrap {
  padding: 20px 24px;
  background: var(--bg);
  border-top: 1px solid var(--rule);
}

.diagram-label {
  font-size: 13px;
  font-weight: bold;
  color: var(--ink-light);
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

#diagram {
  width: 100%;
  height: auto;
  display: block;
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 600px) {
  .calc-panel {
    padding: 16px;
  }

  .field-row {
    grid-template-columns: 1fr;
  }

  .ratio-grid {
    grid-template-columns: 1fr 1fr;
  }

  .results-grid,
  .results-grid--inner {
    grid-template-columns: 1fr 1fr;
  }

  /* Span the third cell (dot span) full width on small screens */
  .result-cell:nth-child(3),
  .result-cell--inner:nth-child(3) {
    border-top: 1px solid var(--rule);
    grid-column: 1 / -1;
    border-right: none;
  }
}