/* Facturia — design system */
:root {
  --c-bg: #f7f8fa;
  --c-surface: #ffffff;
  --c-text: #17202e;
  --c-muted: #5d6b7e;
  --c-accent: #d52b1e;      /* rouge suisse */
  --c-accent-dark: #b02318;
  --c-ink: #1d3054;
  --c-ink-dark: #142442;
  --c-soft: #eef1f6;
  --c-border: #dfe4ec;
  --c-ok: #1e7a3d;
  --c-err: #b4423a;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(23, 32, 46, .05), 0 8px 24px -12px rgba(23, 32, 46, .12);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --c-bg: #10151d;
    --c-surface: #182029;
    --c-text: #e8ecf1;
    --c-muted: #93a0b0;
    --c-soft: #1f2a36;
    --c-border: #2b3642;
    --c-ink: #cfd9ea;
    --c-ink-dark: #b7c6de;
    --shadow: 0 1px 2px rgba(0, 0, 0, .35), 0 8px 24px -12px rgba(0, 0, 0, .5);
  }
}

* { box-sizing: border-box; }
body {
  margin: 0; font-family: var(--font); font-size: 16px; line-height: 1.6;
  color: var(--c-text); background: var(--c-bg); -webkit-font-smoothing: antialiased;
}
a { color: var(--c-accent); }
a:hover { color: var(--c-accent-dark); }
.container { max-width: 1040px; margin: 0 auto; padding: 0 20px; }
.container.narrow { max-width: 640px; }
.center { text-align: center; }
.muted { color: var(--c-muted); }
.small { font-size: .87rem; }

h1, h2, h3 { line-height: 1.2; letter-spacing: -.3px; }
h1 { font-size: clamp(1.8rem, 4.2vw, 2.7rem); margin: .2em 0 .4em; font-weight: 800; }
h2 { font-size: clamp(1.25rem, 2.6vw, 1.6rem); margin: 1.4em 0 .6em; font-weight: 700; }
h3 { font-size: 1.08rem; margin: .6em 0 .3em; }
.lead { font-size: 1.12rem; color: var(--c-muted); max-width: 58ch; }
.kicker { text-transform: uppercase; letter-spacing: .1em; font-size: .78rem; font-weight: 700; color: var(--c-accent); }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--c-bg) 90%, transparent);
  backdrop-filter: blur(10px); border-bottom: 1px solid var(--c-border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.logo { display: flex; align-items: center; gap: 8px; font-size: 1.2rem; font-weight: 800; color: var(--c-text); text-decoration: none; }
.logo svg { color: var(--c-accent); }
.logo em, .logo-text em { color: var(--c-accent); font-style: normal; }
.main-nav { display: flex; align-items: center; gap: 20px; }
.main-nav a { color: var(--c-text); text-decoration: none; font-weight: 500; font-size: .94rem; }
.main-nav a:hover { color: var(--c-accent); }
.nav-pro { background: var(--c-accent); color: #fff !important; padding: 6px 16px; border-radius: 99px; }
.nav-pro:hover { background: var(--c-accent-dark); }
.lang-switch { border: 1px solid var(--c-border); border-radius: 8px; padding: 3px 8px; font-size: .78rem !important; color: var(--c-muted) !important; }
.inline-logout { display: inline; }
.link-btn { background: none; border: 0; padding: 0; color: var(--c-muted); cursor: pointer; font: inherit; font-size: .94rem; }
.link-btn:hover { color: var(--c-accent); }
.link-btn.danger:hover { color: var(--c-err); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 10px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--c-text); margin: 5px 0; border-radius: 2px; }

/* Hero */
.hero { padding: 64px 0 40px; }
.hero-inner { display: grid; grid-template-columns: 1.1fr .9fr; gap: 46px; align-items: center; }
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; margin: 24px 0 10px; }
.center-ctas { justify-content: center; }

/* Mock facture (hero) */
.mock-invoice {
  background: #fff; border-radius: 14px; box-shadow: var(--shadow);
  border: 1px solid var(--c-border); padding: 22px; max-width: 360px; margin: 0 auto;
  transform: rotate(1.5deg);
}
.mock-line { display: block; height: 9px; border-radius: 5px; background: #e8ebf0; margin-bottom: 8px; }
.mock-line.w80 { width: 80%; } .mock-line.w70 { width: 70%; } .mock-line.w60 { width: 60%; } .mock-line.w40 { width: 40%; }
.mock-head { margin-bottom: 18px; }
.mock-rows { margin-bottom: 18px; }
.mock-pay { display: flex; gap: 14px; border-top: 2px dashed #cfd5de; padding-top: 14px; }
.mock-qr { width: 110px; flex-shrink: 0; }
.mock-pay-lines { flex: 1; padding-top: 8px; }

/* Sections & cards */
.section { padding: 42px 0; }
.section-alt { background: var(--c-soft); }
.section-title { margin-top: 0; }
.section-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.feat-card h3 { margin-top: 0; }
.how-list { font-size: 1.05rem; padding-left: 22px; }
.how-list li { margin-bottom: 12px; }

/* Pricing */
.pricing-grid { max-width: 760px; margin: 0 auto; }
.price-card { display: flex; flex-direction: column; }
.price-card h3 { margin-top: 0; }
.price-card .price { font-size: 2rem; font-weight: 800; margin: 0 0 10px; }
.price-note { font-size: .85rem; font-weight: 400; color: var(--c-muted); display: block; }
.price-card ul { list-style: none; padding: 0; margin: 0 0 18px; flex: 1; }
.price-card li { padding: 6px 0; border-bottom: 1px dashed var(--c-border); }
.price-card li:last-child { border: 0; }
.price-card-pro { border-color: var(--c-accent); border-width: 2px; }
.faq-item { margin-bottom: 10px; padding: 16px 20px; }
.faq-item summary { font-weight: 600; cursor: pointer; }
.faq-item p { margin: 10px 0 0; }

/* Buttons */
.btn {
  display: inline-block; padding: 11px 22px; border-radius: 10px; font-weight: 600;
  font-size: .98rem; text-decoration: none; cursor: pointer; border: 1px solid transparent;
  transition: .15s; font-family: var(--font); text-align: center;
}
.btn-primary { background: var(--c-accent); color: #fff; }
.btn-primary:hover { background: var(--c-accent-dark); color: #fff; }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }
.btn-ghost { background: transparent; border-color: var(--c-border); color: var(--c-text); }
.btn-ghost:hover { border-color: var(--c-accent); color: var(--c-accent); }
.btn-xl { padding: 14px 30px; font-size: 1.05rem; }

/* Forms */
.stack-form { display: flex; flex-direction: column; gap: 14px; margin-top: 12px; }
.stack-form label, .form-row label { font-weight: 600; font-size: .88rem; display: flex; flex-direction: column; gap: 5px; }
.form-row { display: flex; gap: 10px; }
.form-row .grow { flex: 1; }
.w-90 { width: 90px; } .w-120 { width: 130px; } .w-40 { width: 40px; }
input, select, textarea {
  padding: 10px 12px; border: 1px solid var(--c-border); border-radius: 8px;
  font-size: .98rem; font-family: var(--font); background: var(--c-surface); color: var(--c-text); width: 100%;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--c-accent); outline-offset: 1px; border-color: transparent; }
.hp { position: absolute !important; left: -9999px !important; height: 1px; width: 1px; opacity: 0; }
.field-help { font-weight: 400; font-size: .8rem; color: var(--c-muted); }
.field-help.ok { color: var(--c-ok); font-weight: 600; }
.form-msg { font-weight: 600; margin-top: 10px; }
.form-msg.ok { color: var(--c-ok); }
.form-msg.err { color: var(--c-err); }
.auth-card { padding: 28px; }

/* Notices */
.notice { padding: 11px 15px; border-radius: 9px; font-weight: 500; background: var(--c-soft); border: 1px solid var(--c-border); margin: 10px 0; }
.notice-ok { background: #e5f3e9; border-color: #bcdcc6; color: #1e5c33; }
.notice-err { background: #fbe6e3; border-color: #efc5c0; color: #8c342d; }
@media (prefers-color-scheme: dark) {
  .notice-ok { background: #1c3323; border-color: #2c4d36; color: #90d3a5; }
  .notice-err { background: #3c221f; border-color: #5c332e; color: #eb9f97; }
}

/* App */
.breadcrumb { font-size: .9rem; margin-bottom: 8px; }
.breadcrumb a { color: var(--c-muted); text-decoration: none; }
.setup-card, .empty-card { margin-top: 18px; padding: 34px; text-align: center; }
.table-card { padding: 8px 16px; overflow-x: auto; }
.table-card table { width: 100%; border-collapse: collapse; font-size: .93rem; }
.table-card td, .table-card th { padding: 9px 8px; text-align: left; border-bottom: 1px solid var(--c-border); }
.table-card tr:last-child td { border-bottom: 0; }
.table-card .num, td.num, th.num { text-align: right; }
.row-actions { text-align: right; white-space: nowrap; }
.row-actions form { display: inline-block; margin-left: 10px; }
.contact-msg { border-bottom: 1px solid var(--c-border); padding: 8px 0; }
.ev-data { color: var(--c-muted); font-size: .82rem; }

/* Facture — formulaire */
.form-cols { align-items: start; margin-bottom: 18px; }
.form-cols h2, .items-card h2 { margin-top: 0; }
.items-card { margin-bottom: 20px; }
.items-table { width: 100%; border-collapse: collapse; }
.items-table th { text-align: left; font-size: .8rem; text-transform: uppercase; letter-spacing: .05em; color: var(--c-muted); padding: 6px 6px; }
.items-table td { padding: 5px 6px; vertical-align: middle; }
.items-table .line-total { font-variant-numeric: tabular-nums; font-weight: 600; }
.totals { text-align: right; margin-top: 14px; font-variant-numeric: tabular-nums; }
.totals p { margin: 4px 0; }
.totals .grand { font-size: 1.2rem; }

/* Pro / succès */
.pro-card { padding: 34px; }
.feature-list { list-style: none; padding: 0; margin: 18px auto; max-width: 420px; text-align: left; }
.feature-list li { padding: 7px 0; border-bottom: 1px dashed var(--c-border); }
.feature-list li:last-child { border: 0; }
.success-card { padding: 40px 30px; }
.success-icon { font-size: 3rem; margin-bottom: 6px; }

/* Admin */
.stat-grid { margin-bottom: 24px; }
.stat { text-align: center; padding: 16px 10px; }
.stat-num { font-size: 1.45rem; font-weight: 800; display: block; }
.stat-num small { font-size: .8rem; font-weight: 400; color: var(--c-muted); }
.stat-label { color: var(--c-muted); font-size: .8rem; }
.chart { width: 100%; height: 120px; display: block; }

/* Articles */
.article-container { max-width: 720px; }
.article-body { font-size: 1.04rem; }
.article-body h2 { margin-top: 1.4em; }

/* Footer */
.site-footer { border-top: 1px solid var(--c-border); padding: 32px 0; margin-top: 28px; }
.footer-inner { display: flex; flex-direction: column; gap: 14px; }
.logo-text { font-weight: 800; font-size: 1.1rem; }
.footer-nav { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-nav a { color: var(--c-muted); text-decoration: none; font-size: .9rem; }
.footer-nav a:hover { color: var(--c-accent); }

/* Responsive */
@media (max-width: 860px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-art { display: none; }
  .form-cols { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .grid-2 { grid-template-columns: 1fr; }
  .main-nav {
    display: none; position: absolute; top: 60px; left: 0; right: 0;
    background: var(--c-bg); border-bottom: 1px solid var(--c-border);
    flex-direction: column; padding: 18px 20px; gap: 14px; align-items: flex-start;
  }
  .main-nav.open { display: flex; }
  .nav-toggle { display: block; }
  .form-row { flex-wrap: wrap; }
}