/* =========================================================
   Simulateur de credit — BAREME HAB GENERAL
   Design : refined minimalism, accent #2563eb
   ========================================================= */

/* --- Tokens --- */
:root {
  --color-bg:           #fafbfc;
  --color-surface:      #ffffff;
  --color-text:         #0f172a;
  --color-text-soft:    #475569;
  --color-text-mute:    #94a3b8;
  --color-border:       #e2e8f0;
  --color-border-hover: #cbd5e1;
  --color-accent:       #2563eb;
  --color-accent-strong:#1d4ed8;
  --color-accent-soft:  #eff6ff;
  --color-success:      #059669;
  --color-danger:       #dc2626;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  --shadow-subtle:   0 1px 2px rgba(15, 23, 42, .04);
  --shadow-medium:   0 4px 12px rgba(15, 23, 42, .06), 0 1px 2px rgba(15, 23, 42, .04);
  --shadow-elevated: 0 12px 32px rgba(15, 23, 42, .08);

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-num:  "Inter", ui-monospace, "SF Mono", Menlo, monospace;

  --container: 1080px;

  --transition-fast: 120ms cubic-bezier(.4, 0, .2, 1);
  --transition-base: 200ms cubic-bezier(.4, 0, .2, 1);
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-feature-settings: "cv11", "ss01", "cv02";
  font-size: 15px;
  line-height: 1.55;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

input {
  font: inherit;
  color: inherit;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover { color: var(--color-accent-strong); }

/* --- Layout shell --- */
.shell {
  max-width: var(--container);
  margin: 0 auto;
  padding: 32px 24px 64px;
}

@media (min-width: 768px) {
  .shell { padding: 56px 40px 80px; }
}

/* --- Top bar --- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

@media (min-width: 768px) {
  .topbar { margin-bottom: 48px; }
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-text);
  color: var(--color-surface);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand-text strong {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
}

.brand-text span {
  font-size: 12px;
  color: var(--color-text-soft);
}

.bareme-period {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  font-size: 12px;
  color: var(--color-text-soft);
  font-weight: 500;
}

.bareme-period::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--color-success);
}

/* --- Grid principale --- */
.grid {
  display: grid;
  gap: 24px;
}

@media (min-width: 980px) {
  .grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: start;
  }
}

.result-wrap {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* --- Cards --- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: var(--shadow-subtle);
}

@media (min-width: 768px) {
  .card { padding: 40px; }
}

.card-title {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--color-text);
  margin-bottom: 6px;
}

.card-sub {
  font-size: 14px;
  color: var(--color-text-soft);
  margin-bottom: 32px;
}

/* --- Form fields --- */
.field {
  margin-bottom: 24px;
}

.field:last-child { margin-bottom: 0; }

.field-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--color-text-soft);
  margin-bottom: 10px;
}

.field-hint {
  display: block;
  font-size: 12px;
  color: var(--color-text-mute);
  margin-top: 8px;
}

.field-error {
  display: none;
  font-size: 13px;
  color: var(--color-danger);
  margin-top: 8px;
}

.field.has-error .field-error { display: block; }
.field.has-error .amount-input { border-color: var(--color-danger); }

/* --- Amount input --- */
.amount-input {
  display: flex;
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.amount-input:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, .14);
}

.amount-input input {
  flex: 1;
  padding: 14px 16px;
  font-size: 18px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  border: none;
  outline: none;
  background: transparent;
  width: 100%;
}

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

.amount-input .suffix {
  padding-right: 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-soft);
}

/* --- Segmented (jours) --- */
.segmented {
  display: inline-flex;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 4px;
  gap: 4px;
}

.seg {
  flex: 1;
  padding: 10px 20px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-soft);
  transition: all var(--transition-fast);
  min-width: 110px;
  position: relative;
}

.seg:hover { color: var(--color-text); }

.seg.is-active {
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--shadow-subtle);
}

.seg:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* --- Duration chips --- */
.duration-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
  gap: 8px;
}

.chip {
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-soft);
  background: var(--color-surface);
  font-variant-numeric: tabular-nums;
  transition: all var(--transition-fast);
  text-align: center;
}

.chip:hover:not(.is-active):not(:disabled) {
  border-color: var(--color-border-hover);
  color: var(--color-text);
}

.chip.is-active {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
  box-shadow: inset 0 0 0 1px var(--color-accent);
}

.chip:disabled {
  opacity: .35;
  cursor: not-allowed;
}

.chip:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* --- Result card --- */
.result-card {
  position: relative;
  overflow: hidden;
}

.result-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top right, rgba(37, 99, 235, .04), transparent 60%);
  pointer-events: none;
}

.result-card > * { position: relative; }

.result-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--color-text-soft);
  margin-bottom: 12px;
}

.result-amount {
  font-size: 56px;
  font-weight: 700;
  letter-spacing: -.025em;
  line-height: 1;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 8px;
}

@media (min-width: 768px) {
  .result-amount { font-size: 72px; }
}

.result-amount .currency {
  font-size: .42em;
  font-weight: 500;
  color: var(--color-text-soft);
  letter-spacing: 0;
}

.result-amount.is-empty {
  color: var(--color-text-mute);
}

.result-sub {
  display: block;
  font-size: 14px;
  color: var(--color-text-soft);
  margin-bottom: 32px;
}

.result-divider {
  height: 1px;
  background: var(--color-border);
  margin: 24px 0;
  border: none;
}

.result-details {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 24px;
}

.result-details > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  font-size: 14px;
}

.result-details dt {
  color: var(--color-text-soft);
}

.result-details dd {
  color: var(--color-text);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.result-details dd.is-highlight {
  color: var(--color-accent-strong);
  font-weight: 600;
}

.result-note {
  font-size: 12px;
  line-height: 1.6;
  color: var(--color-text-soft);
  padding: 12px 14px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.result-note strong {
  color: var(--color-text);
  font-weight: 600;
}

/* --- Empty state --- */
.result-empty .result-amount .currency,
.result-empty .result-amount .value { color: var(--color-text-mute); }

.result-empty .result-details dd { color: var(--color-text-mute); }

/* --- Loading state --- */
.is-loading .result-amount {
  opacity: .55;
  transition: opacity var(--transition-base);
}

/* --- Result actions (bonus B1 + B3) --- */
.result-actions {
  display: flex;
  gap: 8px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.btn-action {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-soft);
  transition: all var(--transition-fast);
}

.btn-action:hover {
  border-color: var(--color-border-hover);
  color: var(--color-text);
  background: var(--color-bg);
}

.btn-action:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn-action svg {
  flex-shrink: 0;
}

.btn-action.is-success {
  border-color: var(--color-success);
  color: var(--color-success);
  background: rgba(5, 150, 105, .06);
}

/* --- Comparison mode (bonus B5) --- */
.compare-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-soft);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.compare-toggle:hover {
  border-color: var(--color-border-hover);
  color: var(--color-text);
}

.compare-toggle input {
  accent-color: var(--color-accent);
}

.compare-card {
  display: none;
  border: 1px dashed var(--color-border);
  background: var(--color-bg);
}

.compare-card.is-visible {
  display: block;
}

.compare-card .result-label {
  color: var(--color-accent-strong);
}

.compare-card .result-amount {
  font-size: 42px;
}

@media (min-width: 768px) {
  .compare-card .result-amount { font-size: 56px; }
}

.compare-diff {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
  font-size: 12px;
  font-weight: 600;
  margin-left: 8px;
}

.compare-diff.is-positive { background: rgba(220, 38, 38, .08); color: var(--color-danger); }
.compare-diff.is-negative { background: rgba(5, 150, 105, .08); color: var(--color-success); }

/* --- Footer --- */
.footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--color-text-mute);
}

.footer a {
  color: var(--color-text-soft);
  font-weight: 500;
}

.footer a:hover { color: var(--color-text); }

/* --- PWA install popup (bonus PWA) --- */
.pwa-install {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 0 16px 16px;
  z-index: 50;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 240ms cubic-bezier(.4, 0, .2, 1), transform 240ms cubic-bezier(.4, 0, .2, 1);
  pointer-events: none;
}

.pwa-install.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.pwa-install__card {
  max-width: 520px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-elevated);
  padding: 20px;
}

.pwa-install__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 16px;
}

.pwa-install__icon {
  flex-shrink: 0;
}

.pwa-install__icon img {
  display: block;
  border-radius: 9px;
}

.pwa-install__copy {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.pwa-install__copy strong {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
}

.pwa-install__copy span {
  font-size: 13px;
  color: var(--color-text-soft);
  line-height: 1.45;
}

.pwa-install__close {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  color: var(--color-text-mute);
  font-size: 22px;
  line-height: 1;
  display: grid;
  place-items: center;
  transition: all var(--transition-fast);
}

.pwa-install__close:hover {
  background: var(--color-bg);
  color: var(--color-text);
}

.pwa-install__steps {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
}

.pwa-install__steps li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  font-size: 13px;
  color: var(--color-text-soft);
  line-height: 1.5;
}

.pwa-install__steps li:not(:last-child) {
  border-bottom: 1px solid var(--color-border);
}

.pwa-install__step-num {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 999px;
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
  font-size: 12px;
  font-weight: 700;
  display: grid;
  place-items: center;
}

.pwa-install__steps strong {
  color: var(--color-text);
  font-weight: 600;
}

.pwa-install__actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

.pwa-install__primary {
  padding: 10px 18px;
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  transition: background var(--transition-fast);
}

.pwa-install__primary:hover {
  background: var(--color-accent-strong);
}

.pwa-install__secondary {
  padding: 10px 16px;
  background: transparent;
  color: var(--color-text-soft);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.pwa-install__secondary:hover {
  background: var(--color-bg);
  color: var(--color-text);
}

@media (min-width: 768px) {
  .pwa-install {
    left: auto;
    right: 24px;
    bottom: 24px;
    padding: 0;
  }
  .pwa-install__card {
    max-width: 360px;
  }
}

/* --- Utility --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Print --- */
@media print {
  .footer, .topbar .bareme-period { color: #000; }
  .card { box-shadow: none; border: 1px solid #ccc; }
}