/* =============================================================================
   Tax Calculator 2026 — Stylesheet
   styles.css
   ============================================================================= */

/* ── Reset & base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Design tokens (dark theme default) ── */
:root {
  --bg:        #0d0f14;
  --surface:   #13161d;
  --surface2:  #1a1e28;
  --border:    #252935;
  --accent:    #c8f542;
  --accent2:   #42c8f5;
  --accent3:   #f5a742;
  --text:      #e8ecf4;
  --muted:     #6b7385;
  --bracket0:  #c8f542;
  --bracket1:  #42c8f5;
  --bracket2:  #f5a742;
  --nis:       #a78bfa;
  --nis-dim:   rgba(167,139,250,0.12);
  --nis-border:rgba(167,139,250,0.2);
}

/* ── Light theme override ── */
body.light {
  --bg:        #f0f2f7;
  --surface:   #ffffff;
  --surface2:  #f5f7fc;
  --border:    #dde1ed;
  --accent:    #5a9e0a;
  --accent2:   #0882b0;
  --accent3:   #c07800;
  --text:      #1a1e2e;
  --muted:     #7a8099;
  --bracket0:  #5a9e0a;
  --bracket1:  #0882b0;
  --bracket2:  #c07800;
  --nis:       #6d3fd6;
  --nis-dim:   rgba(109,63,214,0.10);
  --nis-border:rgba(109,63,214,0.18);
}

/* ── Global transitions when theme switches ── */
body, .card, .brackets-card, .nis-card, .theme-bar,
.result-row, .section-header, .slider, input[type="number"] {
  transition: background 0.3s, border-color 0.3s, color 0.3s;
}

/* ── Layout ── */
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Mono', monospace;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 48px 20px 80px;
  position: relative;
  overflow-x: hidden;
}

/* Ambient background glows */
body::before {
  content: '';
  position: fixed;
  top: -200px; left: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(200,245,66,0.04) 0%, transparent 70%);
  pointer-events: none;
}
body::after {
  content: '';
  position: fixed;
  bottom: -200px; right: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(66,200,245,0.04) 0%, transparent 70%);
  pointer-events: none;
}
body.light::before { background: radial-gradient(circle, rgba(90,158,10,0.05) 0%, transparent 70%); }
body.light::after  { background: radial-gradient(circle, rgba(8,130,176,0.05) 0%, transparent 70%); }

/* ── Animations ── */
@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-16px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Page header ── */
.header   { text-align: center; margin-bottom: 48px; animation: fadeDown 0.6s ease both; }
.eyebrow  { font-size: 12px; letter-spacing: 0.3em; text-transform: uppercase; color: var(--accent); margin-bottom: 12px; }
h1        { font-family: 'DM Serif Display', serif; font-size: clamp(2.64rem, 5vw, 4.2rem); line-height: 1.1; color: var(--text); margin-bottom: 8px; }
h1 em     { font-style: italic; color: var(--accent); }
.subtitle { font-size: 13.2px; color: var(--muted); letter-spacing: 0.1em; }

/* ── Cards ── */
.card, .brackets-card, .nis-card {
  width: 100%;
  max-width: 680px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.card          { animation: fadeUp 0.6s ease 0.1s both; }
.brackets-card { margin-top: 16px; animation: fadeUp 0.6s ease 0.2s both; }
.nis-card      { margin-top: 16px; animation: fadeUp 0.6s ease 0.3s both; }

.card-header {
  padding: 20px 28px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}
.card-body  { padding: 28px; }
.card-title { font-size: 13.2px; color: var(--muted); letter-spacing: 0.15em; margin-left: 6px; }

/* Traffic-light dots */
.dot        { width: 8px; height: 8px; border-radius: 50%; }
.dot-red    { background: #ff5f57; }
.dot-yellow { background: #febc2e; }
.dot-green  { background: #28c840; }

/* ── Frequency toggle (Annual / Monthly / Weekly) ── */
.mode-toggle {
  display: flex;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 3px;
  margin-bottom: 28px;
  width: fit-content;
}
.mode-btn {
  padding: 8px 24px;
  font-family: 'DM Mono', monospace;
  font-size: 13.2px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: none;
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.2s;
  background: transparent;
  color: var(--muted);
}
.mode-btn.active           { background: var(--accent); color: #0d0f14; font-weight: 500; }
body.light .mode-btn.active { color: #ffffff; }

/* ── Income input ── */
.input-group   { margin-bottom: 28px; }
.input-label   { display: block; font-size: 12px; letter-spacing: 0.25em; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }
.input-wrap    { position: relative; }
.currency-symbol {
  position: absolute;
  left: 16px; top: 50%;
  transform: translateY(-50%);
  font-size: 19.2px;
  color: var(--accent);
  pointer-events: none;
}
input[type="number"] {
  width: 100%;
  padding: 16px 16px 16px 38px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text);
  font-family: 'DM Mono', monospace;
  font-size: 26.4px;
  font-weight: 300;
  outline: none;
  transition: border-color 0.2s;
  appearance: textfield;
  -moz-appearance: textfield;
}
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button { -webkit-appearance: none; }
input[type="number"]:focus       { border-color: var(--accent); }
input[type="number"]::placeholder { color: var(--muted); font-size: 21.6px; }
body.light input[type="number"]   { color: var(--text); }

/* ── Bracket visualiser bar ── */
.brackets-viz  { margin-bottom: 28px; }
.viz-label     { font-size: 12px; letter-spacing: 0.25em; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; }
.bar-track     { height: 8px; background: var(--surface2); border: 1px solid var(--border); border-radius: 2px; overflow: hidden; display: flex; margin-bottom: 10px; }
.bar-segment   { height: 100%; transition: width 0.5s cubic-bezier(0.23, 1, 0.32, 1); }
.seg-0         { background: var(--bracket0); }
.seg-1         { background: var(--bracket1); }
.seg-2         { background: var(--bracket2); }
.bracket-legend { display: flex; gap: 20px; flex-wrap: wrap; }
.legend-item   { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--muted); }
.legend-dot    { width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }

/* ── Result rows ── */
.results      { background: var(--surface2); border: 1px solid var(--border); border-radius: 3px; overflow: hidden; }
.result-row   { display: flex; justify-content: space-between; align-items: center; padding: 14px 20px; border-bottom: 1px solid var(--border); transition: background 0.15s; }
.result-row:last-child { border-bottom: none; }

.result-row.total {
  background: rgba(200,245,66,0.04);
  border-top: 1px solid rgba(200,245,66,0.15);
  padding: 18px 20px;
}
.result-row.net   { background: rgba(66,200,245,0.04); border-top: 1px solid rgba(66,200,245,0.1); }
.result-row.allowance {
  background: rgba(245,167,66,0.04);
  border-top: 1px solid rgba(245,167,66,0.1);
}
.result-row.nis-row   { background: rgba(167,139,250,0.03); border-top: 1px solid var(--nis-border); }
.result-row.nis-total { background: rgba(167,139,250,0.06); border-top: 1px solid var(--nis-border); padding: 18px 20px; }
.result-row.grand-total {
  background: rgba(66,200,245,0.06);
  border-top: 2px solid rgba(66,200,245,0.2);
  padding: 18px 20px;
}

/* Light theme row overrides */
body.light .result-row.allowance   { background: rgba(192,120,0,0.04); border-top-color: rgba(192,120,0,0.15); }
body.light .result-row.total       { background: rgba(90,158,10,0.05); border-top-color: rgba(90,158,10,0.2); }
body.light .result-row.net         { background: rgba(8,130,176,0.05); border-top-color: rgba(8,130,176,0.15); }
body.light .result-row.nis-row     { background: rgba(109,63,214,0.03); }
body.light .result-row.nis-total   { background: rgba(109,63,214,0.05); }
body.light .result-row.grand-total { background: rgba(8,130,176,0.06); border-top-color: rgba(8,130,176,0.25); }

/* Result typography */
.result-label  { font-size: 13.2px; letter-spacing: 0.08em; color: var(--muted); display: flex; align-items: center; gap: 8px; }
.result-value  { font-size: 18px; font-weight: 500; color: var(--text); text-align: right; }
.result-sub    { font-size: 12px; color: var(--muted); margin-top: 1px; }
.eff-rate      { display: block; font-size: 10.8px; color: var(--muted); margin-top: 2px; letter-spacing: 0.05em; }

.result-row.total .result-label   { color: var(--text); font-size: 14.4px; }
.result-row.total .result-value   { font-size: 24px; color: var(--accent); }
.result-row.net .result-value     { color: var(--accent2); }
.result-row.allowance .result-value { color: var(--accent3); }
.result-row.nis-total .result-label { color: var(--text); font-size: 14.4px; }
.result-row.nis-total .result-value { font-size: 24px; color: var(--nis); }
.result-row.grand-total .result-label { color: var(--text); font-size: 14.4px; }
.result-row.grand-total .result-value { font-size: 24px; color: var(--accent2); }

/* ── Badges ── */
.rate-badge   { font-size: 10.8px; padding: 2px 6px; border-radius: 2px; letter-spacing: 0.05em; }
.badge-0      { background: rgba(200,245,66,0.12); color: var(--bracket0); }
.badge-1      { background: rgba(66,200,245,0.12); color: var(--bracket1); }
.badge-2      { background: rgba(245,167,66,0.12); color: var(--bracket2); }
.badge-travel { font-size: 10.8px; padding: 2px 6px; border-radius: 2px; letter-spacing: 0.05em; background: rgba(245,167,66,0.12); color: var(--accent3); }
.badge-nis    { font-size: 10.8px; padding: 2px 6px; border-radius: 2px; letter-spacing: 0.05em; background: var(--nis-dim); color: var(--nis); }

body.light .badge-travel { background: rgba(192,120,0,0.12); }
body.light .badge-0      { background: rgba(90,158,10,0.12); }
body.light .badge-1      { background: rgba(8,130,176,0.12); }
body.light .badge-2      { background: rgba(192,120,0,0.12); }

/* ── Divider ── */
.divider      { display: flex; align-items: center; gap: 12px; margin: 20px 0; }
.divider-line { flex: 1; height: 1px; background: var(--border); }
.divider-text { font-size: 10.8px; color: var(--muted); letter-spacing: 0.2em; text-transform: uppercase; }

/* ── Empty state ── */
.empty       { text-align: center; padding: 32px 20px; color: var(--muted); font-size: 13.2px; letter-spacing: 0.1em; }
.empty-icon  { font-size: 33.6px; margin-bottom: 10px; opacity: 0.4; }

/* ── Allowance note ── */
.allowance-note {
  font-size: 10.8px;
  color: var(--muted);
  margin-top: 12px;
  padding: 10px 14px;
  border: 1px dashed var(--border);
  border-radius: 3px;
  line-height: 1.6;
  letter-spacing: 0.04em;
}

/* ── Travel allowance toggle switch ── */
.switch-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
}
.switch-label { display: flex; align-items: center; gap: 10px; font-size: 13.2px; letter-spacing: 0.08em; color: var(--muted); }
.switch       { position: relative; width: 40px; height: 22px; flex-shrink: 0; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
  position: absolute;
  inset: 0;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 22px;
  cursor: pointer;
  transition: background 0.25s, border-color 0.25s;
}
.slider::before {
  content: '';
  position: absolute;
  width: 14px; height: 14px;
  left: 3px; top: 3px;
  background: var(--muted);
  border-radius: 50%;
  transition: transform 0.25s, background 0.25s;
}
.switch input:checked + .slider              { background: rgba(245,167,66,0.15); border-color: rgba(245,167,66,0.4); }
.switch input:checked + .slider::before     { transform: translateX(18px); background: var(--accent3); }
body.light .switch input:checked + .slider  { background: rgba(192,120,0,0.15); border-color: rgba(192,120,0,0.45); }
.switch-desc     { font-size: 12px; color: var(--muted); letter-spacing: 0.04em; transition: color 0.2s; }
.switch-desc.on  { color: var(--accent3); }

/* ── Bracket reference card ── */
.bracket-row         { display: grid; grid-template-columns: 1fr 1fr 1fr; padding: 14px 28px; border-bottom: 1px solid var(--border); align-items: center; }
.bracket-row:last-child { border-bottom: none; }
.bracket-row.header  { font-size: 10.8px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--muted); padding: 12px 28px; }
.bracket-range       { font-size: 14.4px; color: var(--text); }
.bracket-rate        { font-size: 21.6px; font-family: 'DM Serif Display', serif; }
.bracket-rate.r0     { color: var(--bracket0); }
.bracket-rate.r1     { color: var(--bracket1); }
.bracket-rate.r2     { color: var(--bracket2); }
.bracket-on          { font-size: 13.2px; color: var(--muted); }

/* ── NIS reference card ── */
.nis-ref-row {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr 0.6fr 0.8fr;
  padding: 12px 28px;
  border-bottom: 1px solid var(--border);
  align-items: center;
  gap: 8px;
}
.nis-ref-row.header  { font-size: 10.8px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--muted); padding: 12px 28px; }
.nis-ref-row:last-child { border-bottom: none; }
.nis-fund-name       { font-size: 13.2px; color: var(--text); }
.nis-rate            { font-size: 15.6px; color: var(--nis); font-family: 'DM Serif Display', serif; }
.nis-ceiling         { font-size: 12px; color: var(--muted); }
.nis-max             { font-size: 12px; color: var(--muted); }
.ceiling-note {
  font-size: 10.8px;
  color: var(--muted);
  padding: 12px 28px;
  border-top: 1px dashed var(--border);
  line-height: 1.6;
  letter-spacing: 0.04em;
  background: rgba(167,139,250,0.02);
}
body.light .ceiling-note { background: rgba(109,63,214,0.02); }

/* ── Expand / collapse sections ── */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 13px 20px;
  cursor: pointer;
  user-select: none;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}
.section-header:hover        { background: rgba(255,255,255,0.02); }
body.light .section-header:hover { background: rgba(0,0,0,0.02); }
.section-header-left { display: flex; align-items: center; gap: 10px; font-size: 13.2px; letter-spacing: 0.08em; color: var(--text); }
.section-summary-val { font-size: 18px; font-weight: 500; text-align: right; }
.section-summary-sub { font-size: 10.8px; color: var(--muted); margin-top: 2px; letter-spacing: 0.04em; text-align: right; }

.chevron { width: 14px; height: 14px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; color: var(--muted); font-style: normal; }
.chevron::before {
  content: '›';
  font-size: 19.2px;
  line-height: 1;
  display: block;
  transform: rotate(90deg);
  transition: transform 0.25s ease;
}
.section-header.collapsed .chevron::before { transform: rotate(0deg); }

.collapsible-body          { overflow: hidden; max-height: 1000px; transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1); }
.collapsible-body.collapsed { max-height: 0; }

/* ── Theme toggle bar ── */
.theme-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 14px;
  padding: 14px 20px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  backdrop-filter: blur(10px);
  z-index: 100;
  transition: background 0.3s, border-color 0.3s;
}
.theme-bar-label { font-size: 12px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--muted); transition: color 0.3s; }
.theme-pill {
  display: flex;
  align-items: center;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
  transition: background 0.3s, border-color 0.3s;
}
.theme-opt {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  font-family: 'DM Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  border: none;
  background: transparent;
  color: var(--muted);
  transition: background 0.2s, color 0.2s;
}
.theme-opt.active { background: var(--text); color: var(--bg); }
.theme-icon       { font-size: 14.4px; line-height: 1; }