/* Home Office Deduction Calculator — Officina Systems Micro-Tool Family */
/* Matches design system established in triviaquestiongenerator.officinasystems.com */

:root {
  --bg:        #080c18;
  --bg-card:   #0f1623;
  --bg-panel:  #0d1420;
  --accent:    #00d4ff;
  --accent2:   #0098d4;
  --accent3:   #006fa8;
  --glow:      rgba(0, 212, 255, 0.18);
  --glow-sm:   rgba(0, 212, 255, 0.08);
  --text:      #ffffff;
  --text-2:    #cbd5e1;
  --text-3:    #94a3b8;
  --border:    #162032;
  --border-2:  #1e2f45;
  --green:     #22c55e;
  --green-bg:  rgba(34,197,94,0.12);
  --green-border: rgba(34,197,94,0.35);
  --yellow:    #fbbf24;
  --yellow-bg: rgba(251,191,36,0.12);
  --yellow-border: rgba(251,191,36,0.35);
  --red:       #ef4444;
  --red-bg:    rgba(239,68,68,0.12);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --r:   10px;
  --r-sm: 7px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { height: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* ─── HEADER ─────────────────────────────────────────────── */
.app-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 28px 16px 22px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(0,212,255,0.08) 0%, transparent 100%);
  flex-shrink: 0;
  text-align: center;
  gap: 10px;
}

.header-icon {
  font-size: 56px;
  line-height: 1;
  filter: drop-shadow(0 0 24px rgba(0,212,255,0.4));
}

.brand-name {
  font-size: 36px;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: #ffffff;
  line-height: 1.1;
}

.brand-name em {
  color: var(--accent);
  font-style: normal;
}

.brand-tag {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #94a3b8;
  line-height: 1;
}

.header-intro {
  max-width: 580px;
  font-size: 15px;
  color: var(--text-3);
  line-height: 1.7;
  margin-top: 4px;
}

/* ─── CALCULATOR PANEL ───────────────────────────────────── */
.calc-wrapper {
  width: 100%;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.calc-panel {
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
}

/* Section headings inside panel */
.input-section-title {
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 10px;
}

.input-group {
  background: var(--bg-card);
  border: 1px solid var(--border-2);
  border-radius: var(--r);
  padding: 16px;
}

.input-group-title {
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 7px;
}

.input-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

/* Individual field */
.field {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
}

.field .hint {
  font-size: 11px;
  color: var(--text-3);
  margin-top: 2px;
}

.field-input {
  position: relative;
}

.field-input input {
  width: 100%;
  height: 50px;
  background: var(--bg);
  border: 1.5px solid var(--border-2);
  border-radius: var(--r-sm);
  color: var(--text);
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font);
  padding: 0 42px 0 14px;
  transition: border-color 0.15s, background 0.15s;
  -moz-appearance: textfield;
}
.field-input input::-webkit-inner-spin-button,
.field-input input::-webkit-outer-spin-button { -webkit-appearance: none; }

.field-input input:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(0,212,255,0.04);
}

.field-input input::placeholder {
  color: var(--text-3);
  font-weight: 400;
}

.field-input .unit {
  position: absolute;
  right: 13px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 12px;
  font-weight: 700;
  color: var(--text-3);
  pointer-events: none;
}

/* Note block inside panel */
.panel-note {
  background: rgba(0,212,255,0.06);
  border: 1px solid rgba(0,212,255,0.15);
  border-radius: var(--r-sm);
  padding: 10px 14px;
  font-size: 12px;
  color: var(--text-3);
  line-height: 1.6;
}

.panel-note strong { color: var(--accent); }

/* Calculate button */
.btn-calculate {
  width: 100%;
  height: 62px;
  border: none;
  border-radius: var(--r-sm);
  background: linear-gradient(135deg, #00d4ff 0%, #0098d4 55%, #006fa8 100%);
  color: #000;
  font-size: 20px;
  font-weight: 900;
  font-family: var(--font);
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: all 0.18s;
  box-shadow: 0 4px 18px rgba(0,212,255,0.32);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-calculate:hover  { box-shadow: 0 6px 26px rgba(0,212,255,0.48); transform: translateY(-1px); }
.btn-calculate:active { transform: translateY(0); }

/* ─── RESULTS AREA ───────────────────────────────────────── */
.results-area {
  padding: 24px 16px;
  max-width: 760px;
  margin: 0 auto;
  width: 100%;
  display: none;
}

.results-area.visible {
  display: block;
  animation: fadeUp 0.3s ease;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Winner callout */
.winner-callout {
  border-radius: var(--r);
  padding: 20px;
  margin-bottom: 20px;
  text-align: center;
  border: 2px solid;
}

.winner-callout.green {
  background: var(--green-bg);
  border-color: var(--green-border);
}

.winner-callout.yellow {
  background: var(--yellow-bg);
  border-color: var(--yellow-border);
}

.winner-callout.tie {
  background: rgba(0,212,255,0.07);
  border-color: rgba(0,212,255,0.25);
}

.winner-label {
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 6px;
}

.winner-callout.green .winner-label { color: var(--green); }
.winner-callout.yellow .winner-label { color: var(--yellow); }
.winner-callout.tie .winner-label { color: var(--accent); }

.winner-method {
  font-size: 24px;
  font-weight: 900;
  color: var(--text);
  margin-bottom: 4px;
  line-height: 1.2;
}

.winner-savings {
  font-size: 14px;
  color: var(--text-2);
}

.winner-savings strong {
  font-weight: 800;
}

.winner-callout.green .winner-savings strong { color: var(--green); }
.winner-callout.yellow .winner-savings strong { color: var(--yellow); }
.winner-callout.tie .winner-savings strong { color: var(--accent); }

/* Side-by-side method cards */
.method-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

.method-card {
  background: var(--bg-card);
  border: 1.5px solid var(--border-2);
  border-radius: var(--r);
  padding: 18px;
  position: relative;
}

.method-card.winner-card {
  border-color: var(--green-border);
  background: linear-gradient(135deg, rgba(34,197,94,0.06) 0%, var(--bg-card) 100%);
}

.method-card.loser-card {
  opacity: 0.75;
}

.method-card-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  font-size: 9px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 3px 8px;
  border-radius: 999px;
}

.method-card.winner-card .method-card-badge {
  background: var(--green-bg);
  color: var(--green);
  border: 1px solid var(--green-border);
}

.method-card-name {
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 8px;
}

.method-card-deduction {
  font-size: 36px;
  font-weight: 900;
  color: var(--text);
  line-height: 1;
  margin-bottom: 10px;
}

.method-card.winner-card .method-card-deduction {
  color: var(--green);
}

.method-breakdown {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.breakdown-line {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-3);
  padding: 3px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.breakdown-line:last-child { border-bottom: none; }

.breakdown-line .val {
  font-weight: 600;
  color: var(--text-2);
}

/* Records tip */
.records-tip {
  background: var(--bg-card);
  border: 1px solid var(--border-2);
  border-left: 3px solid var(--accent);
  border-radius: var(--r-sm);
  padding: 16px;
  margin-bottom: 20px;
}

.records-tip-title {
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.records-tip ul {
  padding-left: 18px;
}

.records-tip li {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.7;
}

/* Disclaimer */
.disclaimer {
  background: rgba(251,191,36,0.06);
  border: 1px solid rgba(251,191,36,0.2);
  border-radius: var(--r-sm);
  padding: 12px 14px;
  font-size: 12px;
  color: var(--text-3);
  line-height: 1.6;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.disclaimer-icon { flex-shrink: 0; font-size: 14px; }

/* ─── BELOW-FOLD ─────────────────────────────────────────── */
.below-fold {
  padding: 32px 16px 80px;
  max-width: 680px;
  margin: 0 auto;
  width: 100%;
}

.section-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}

.section-title {
  font-size: 16px;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text);
}

/* Method explainer cards */
.method-explain-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 28px;
}

.method-explain-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 18px;
}

.method-explain-card h3 {
  font-size: 15px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.method-explain-card p {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.7;
}

.formula-chip {
  display: inline-block;
  background: var(--glow-sm);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 5px;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
  font-family: 'Courier New', monospace;
  margin-top: 8px;
}

/* FAQ */
.faq-section { margin-top: 0; }
.faq-item { border: 1px solid var(--border); border-radius: var(--r-sm); margin-bottom: 8px; overflow: hidden; }

.faq-question {
  width: 100%; padding: 13px 16px;
  background: var(--bg-card); border: none;
  color: var(--text); font-size: 14px; font-weight: 600; font-family: var(--font);
  text-align: left; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  transition: background 0.12s;
}
.faq-question:hover { background: #111e30; }
.faq-arrow { color: var(--accent); font-size: 11px; transition: transform 0.22s; flex-shrink: 0; }
.faq-item.open .faq-arrow { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.28s ease; }
.faq-item.open .faq-answer { max-height: 400px; }
.faq-answer-inner { padding: 13px 16px; color: var(--text-2); font-size: 13px; line-height: 1.75; border-top: 1px solid var(--border); }
.faq-answer-inner strong { color: var(--text); }

/* Ad slot */
.ad-slot {
  width: 100%;
  text-align: center;
  min-height: 0;
  overflow: hidden;
}

/* Footer */
.site-footer {
  padding: 20px 16px;
  text-align: center;
  border-top: 1px solid var(--border);
  color: var(--text-3);
  font-size: 12px;
}
.site-footer a { color: var(--accent); text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }

/* Toast */
.toast {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(60px);
  opacity: 0;
  background: var(--bg-card);
  border: 1px solid var(--accent);
  border-radius: var(--r-sm);
  padding: 9px 18px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
  transition: transform 0.25s ease, opacity 0.4s ease;
  z-index: 200;
  white-space: nowrap;
  pointer-events: none;
}
.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }

/* Breadcrumb */
.breadcrumb {
  display: flex; align-items: center; gap: 6px;
  font-size: 12px; color: var(--text-3);
  padding: 8px 0 0;
  margin-bottom: 16px;
}
.breadcrumb a { color: var(--accent); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

/* Cookie banner */
#cookie-banner { display: none; }

/* ─── PRINT ──────────────────────────────────────────────── */
@media print {
  body { background: #fff; color: #000; }
  .app-header, .calc-wrapper, .site-footer { display: none !important; }
  .results-area { display: block !important; }
  .method-card { border: 1px solid #ccc; background: #f9f9f9; }
  .method-card-deduction { color: #000; }
}

/* ─── DESKTOP POLISH ─────────────────────────────────────── */
@media (min-width: 600px) {
  .app-header { padding: 24px 24px 20px; }
  .brand-name { font-size: 42px; }
  .brand-tag { font-size: 14px; }

  .calc-panel { padding: 24px 24px; }

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

  .results-area { padding: 28px 24px; }

  .method-cards {
    grid-template-columns: 1fr 1fr;
  }

  .method-explain-grid {
    grid-template-columns: 1fr 1fr;
  }

  .below-fold { padding: 32px 24px 80px; }
}

@media (min-width: 680px) {
  body { max-width: 70%; margin: 0 auto; }
}