/* ============================================================
   TDS Calculator — Minimal Cards
   Responsive from narrow iframes to full-width embeds.
   ============================================================ */

/* ── Custom Properties (defaults / shared) ────────────────── */
:root {
  --radius:            10px;
  --radius-sm:         8px;
  --font:              'Inter', system-ui, -apple-system, sans-serif;
  --field-bg:          #ffffff;
  --field-border:      #cbd5e1;
  --field-text:        #1e293b;
  --field-placeholder: #94a3b8;
  --field-button-bg:   #f8fafc;
  --field-button-text: #64748b;
  --field-button-hover:#f1f5f9;
}

/* ── WCR Theme (light — navy / gold) ─────────────────────── */
.theme-wcr {
  --color-text:        #1e293b;
  --color-text-muted:  #64748b;
  --color-text-light:  #94a3b8;
  --color-border:      #cbd5e1;
  --color-surface:     #f8fafc;
  --color-bg:          #ffffff;
  --color-accent:      #1e3a5f;
  --color-accent-ring: rgba(30, 58, 95, 0.15);
  --color-green:       #16a34a;
  --color-green-dark:  #15803d;
  --color-green-bg:    linear-gradient(135deg, #f0fdf4, #dcfce7);
  --color-green-border:#bbf7d0;
  --color-red:         #dc2626;
  --color-orange:      #d97706;
  --color-header-bg:   #1e3a5f;
  --color-header-text: #ffffff;
  --color-header-sub:  #cbd5e1;
  --stepper-hover-bg:  #f1f5f9;
  --field-bg:          #ffffff;
  --field-border:      #cbd5e1;
  --field-text:        #1e293b;
  --field-placeholder: #94a3b8;
  --field-button-bg:   #f8fafc;
  --field-button-text: #64748b;
  --field-button-hover:#f1f5f9;

  --chart-grid:         #e2e8f0;
  --chart-label:        #94a3b8;
  --chart-di-color:     #ef4444;
  --chart-di-fill:      rgba(239, 68, 68, 0.08);
  --chart-multi-color:  #22c55e;
  --chart-multi-fill:   rgba(34, 197, 94, 0.08);
  --chart-legend-color: #64748b;
  --chart-font-family:  'Inter', system-ui, sans-serif;
}

/* ── XERO Theme (light — green accent / teal header) ─────── */
.theme-xero {
  --color-text:        #1e293b;
  --color-text-muted:  #456b8a;
  --color-text-light:  #5f88aa;
  --color-border:      #a9c1d4;
  --color-surface:     #ffffff;
  --color-bg:          #ffffff;
  --color-accent:      #03ea2e;
  --color-accent-ring: rgba(3, 234, 46, 0.24);
  --color-green:       #03ea2e;
  --color-green-dark:  #02c327;
  --color-green-bg:    linear-gradient(135deg, rgba(43, 95, 138, 0.1), rgba(3, 234, 46, 0.16));
  --color-green-border:#71f78a;
  --color-red:         #dc2626;
  --color-orange:      #d97706;
  --color-header-bg:   #2b5f8a;
  --color-header-text: #ffffff;
  --color-header-sub:  #d3e7f4;
  --stepper-hover-bg:  #214e74;
  --field-bg:          #2b5f8a;
  --field-border:      #2b5f8a;
  --field-text:        #ffffff;
  --field-placeholder: #d3e7f4;
  --field-button-bg:   #2b5f8a;
  --field-button-text: #ffffff;
  --field-button-hover:#214e74;

  --chart-grid:         #d8e6f2;
  --chart-label:        #5f88aa;
  --chart-di-color:     #ef4444;
  --chart-di-fill:      rgba(239, 68, 68, 0.08);
  --chart-multi-color:  #03ea2e;
  --chart-multi-fill:   rgba(3, 234, 46, 0.1);
  --chart-legend-color: #456b8a;
  --chart-font-family:  'Inter', system-ui, sans-serif;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  min-height: 0;
}

/* ── App Container ─────────────────────────────────────────── */
.tds-app {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px 40px;
}

/* ── Header ────────────────────────────────────────────────── */
.app-header {
  text-align: center;
  padding: 28px 0 24px;
  margin: 0 -24px 0;
  padding-left: 24px;
  padding-right: 24px;
  background: var(--color-header-bg);
  border-radius: var(--radius) var(--radius) 0 0;
}

.app-header h1 {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--color-header-text);
}

.subtitle {
  font-size: 14px;
  color: var(--color-header-sub);
  margin-top: 4px;
}

/* ── Shared Label Style ────────────────────────────────────── */
.input-group label,
.result-label,
.section-title,
.annual-label {
  font-family: var(--font);
}

/* ── Inputs ────────────────────────────────────────────────── */
.inputs-section {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
  margin-top: 24px;
  margin-bottom: 24px;
}

.input-group label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--color-text-muted);
  margin-bottom: 6px;
}

#zip-feedback {
  margin-top: 0.35rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

#zip-feedback.zip-feedback--success {
  color: var(--color-green);
}

#zip-feedback.zip-feedback--warning {
  color: var(--color-orange);
}

#zip-feedback.zip-feedback--error {
  color: var(--color-red);
}

#zip-feedback:empty {
  display: none;
}

.input-group input {
  width: 100%;
  padding: 10px 12px;
  font: 400 15px/1.4 var(--font);
  border: 1.5px solid var(--field-border);
  border-radius: var(--radius-sm);
  background: var(--field-bg);
  color: var(--field-text);
  transition: border-color 0.2s, box-shadow 0.2s;
  -webkit-appearance: none;
  appearance: none;
}

.input-group input::placeholder {
  color: var(--field-placeholder);
}

.input-group input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-ring);
}

/* ── Stepper ───────────────────────────────────────────────── */
.stepper {
  display: flex;
  align-items: stretch;
  border: 1.5px solid var(--field-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--field-bg);
}

.stepper input {
  border: none;
  border-radius: 0;
  text-align: center;
  width: 100%;
  min-width: 0;
  font-weight: 600;
  font-size: 16px;
}

.stepper input:focus {
  outline: none;
}

.stepper button {
  flex-shrink: 0;
  width: 40px;
  background: var(--field-button-bg);
  border: none;
  font-size: 18px;
  color: var(--field-button-text);
  cursor: pointer;
  transition: background 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.stepper button:first-child { border-right: 1.5px solid var(--field-border); }
.stepper button:last-child  { border-left: 1.5px solid var(--field-border); }
.stepper button:hover       { background: var(--field-button-hover); color: var(--field-button-text); }
.stepper button:active      { background: var(--field-button-hover); }

/* ── Results ───────────────────────────────────────────────── */
.results-section {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.result-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.03);
  transition: transform 0.2s, box-shadow 0.2s;
}

.result-card:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

.result-card--di {
  border-left: 3px solid var(--chart-di-color);
}

.result-card--di .result-value {
  color: var(--chart-di-color);
}

.result-card--multi {
  border-left: 3px solid var(--color-accent);
}

.result-card--multi .result-value {
  color: var(--color-accent);
}

.result-card--payback {
  border-left: 3px solid var(--color-orange);
}

.result-card--payback .result-value {
  color: var(--color-orange);
}


.result-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--color-text-light);
  margin-bottom: 6px;
}

.result-value {
  display: block;
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.3px;
}

.result-card--savings {
  background: var(--color-green-bg);
  border-color: var(--color-green-border);
}

.result-card--savings .result-label { color: var(--color-green); }
.result-card--savings .result-value { color: var(--color-green-dark); }

.theme-xero .result-card--multi,
.theme-xero .result-card--savings,
.theme-xero .result-card--payback,
.theme-xero .annual-item:last-child {
  box-shadow: 0 0 0 1px rgba(3, 234, 46, 0.18), 0 10px 20px rgba(43, 95, 138, 0.08);
}

.theme-xero .result-card--payback {
  border-left-color: var(--color-accent);
}

.theme-xero .result-card--payback .result-value,
.theme-xero .section-title,
.theme-xero .annual-value--highlight,
.theme-xero .chart-empty-state__title {
  color: var(--color-accent);
}

/* ── Value Animation ───────────────────────────────────────── */
.value-updated {
  animation: valuePop 0.35s ease-out;
}

@keyframes valuePop {
  0%   { opacity: 0.4; transform: translateY(4px); }
  100% { opacity: 1;   transform: translateY(0); }
}

/* ── Annual Section ────────────────────────────────────────── */
.annual-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}

.section-title {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--color-text);
  margin-bottom: 14px;
}

.annual-row {
  display: flex;
  gap: 16px;
}

.annual-item {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.annual-label {
  font-size: 13px;
  color: var(--color-text-muted);
}

.annual-value {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
}

.annual-value--highlight {
  color: var(--color-green);
}

/* ── Recommendation ────────────────────────────────────────── */
.recommendation {
  text-align: center;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
  transition: all 0.3s;
}

.recommendation:empty {
  display: none;
}

.rec-high   { background: #fef2f2; color: var(--color-red);    border: 1px solid #fecaca; }
.rec-medium { background: #fffbeb; color: var(--color-orange); border: 1px solid #fde68a; }
.rec-low    { background: #f0fdf4; color: var(--color-green);  border: 1px solid var(--color-green-border); }


/* ── Chart ─────────────────────────────────────────────────── */
.chart-section {
  margin-top: 8px;
  margin-bottom: 16px;
}

.chart-container {
  margin-top: 12px;
  position: relative;
  min-height: 260px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at top left, rgba(148, 163, 184, 0.12), transparent 34%),
    linear-gradient(180deg, rgba(248, 250, 252, 0.95), rgba(255, 255, 255, 0.98));
  overflow: hidden;
}

.chart-container canvas {
  width: 100%;
  display: block;
  border-radius: var(--radius-sm);
}

.chart-empty-state {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 28px 24px;
  text-align: center;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(248, 250, 252, 0.96));
}

.chart-empty-state[hidden] {
  display: none;
}

.chart-empty-state__visual {
  position: relative;
  width: 92px;
  height: 58px;
  border: 1px solid rgba(148, 163, 184, 0.28);
  border-radius: 14px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(241, 245, 249, 0.95)),
    repeating-linear-gradient(to top, transparent 0, transparent 13px, rgba(148, 163, 184, 0.08) 13px, rgba(148, 163, 184, 0.08) 14px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.chart-empty-state__line {
  position: absolute;
  left: 10px;
  right: 10px;
  height: 0;
  border-top-width: 3px;
  border-top-style: solid;
  border-radius: 999px;
  transform-origin: left center;
  opacity: 0.9;
}

.chart-empty-state__line--di {
  top: 34px;
  border-top-color: rgba(239, 68, 68, 0.55);
  transform: rotate(-10deg);
}

.chart-empty-state__line--multi {
  top: 24px;
  border-top-color: rgba(34, 197, 94, 0.55);
  transform: rotate(7deg);
}

.chart-empty-state__title {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
}

.chart-empty-state__copy {
  max-width: 360px;
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-text-muted);
}

/* ── Responsive: Medium (tablets / narrower iframes) ──────── */
@media (max-width: 740px) {
  .inputs-section {
    grid-template-columns: 1fr 1fr;
  }

  .input-group--stepper {
    grid-column: 1 / -1;
  }

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

/* ── Responsive: Small (mobile) ───────────────────────────── */
@media (max-width: 480px) {
  .tds-app {
    padding: 0 16px 32px;
  }

  .inputs-section {
    grid-template-columns: 1fr;
  }

  .input-group--stepper {
    grid-column: auto;
  }

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

  .annual-row {
    flex-direction: column;
    gap: 8px;
  }

  .app-header {
    padding: 20px 16px 16px;
    margin: 0 -16px 0;
  }

  .app-header h1 {
    font-size: 22px;
  }

  .result-value {
    font-size: 20px;
  }
}

/* ── Wide layout refinements (1000px+) ─────────────────────── */
@media (min-width: 1000px) {
  .tds-app {
    max-width: 1080px;
  }

  .app-header h1 {
    font-size: 30px;
  }

  .result-card {
    padding: 20px;
  }

  .result-value {
    font-size: 24px;
  }
}