@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:wght@300;400;500;600&family=Inter:wght@300;400;500&display=swap');

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

:root {
  --bg:#F5F4F1;
  --surface:#FBFAF7;
  --surface-alt:#F0F2F4;
  --text:#111318;
  --text-soft:#5F6873;
  --border:#D7DCE2;
  --accent-light:#B7CEDA;
  --accent:#8FAFC2;
  --accent-dark:#5F7E92;
  --header-dark:#1C2430;
  --shadow-soft:0 10px 22px rgba(17,19,24,0.06);
  --shadow-line:0 1px 0 rgba(17,19,24,0.05);
  --rouge-alerte:#8B2020;
  --rouge-bg:rgba(139,32,32,0.08);
  --vert-ok:#1A4A1A;
  --vert-bg:rgba(26,74,26,0.08);
  --orange-warn:#7A4A00;
  --orange-bg:rgba(122,74,0,0.08);
  --serif:'Cormorant Garamond', Georgia, serif;
  --sans:'Inter', system-ui, sans-serif;
}

body {
  font-family: var(--sans);
  background:
    radial-gradient(900px 520px at 18% 8%, rgba(183,206,218,0.55), transparent 60%),
    radial-gradient(880px 520px at 86% 12%, rgba(143,175,194,0.22), transparent 58%),
    linear-gradient(180deg, var(--bg) 0%, #F1F2F0 100%);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
}

.app { min-height: 100vh; display: flex; flex-direction: column; }

.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;
}

/* ── HEADER ── */
.header {
  background: linear-gradient(180deg, #2B3442 0%, var(--header-dark) 100%);
  color: #F6F7F9;
  padding: 0 2.25rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.header-brand { display: flex; align-items: center; gap: 12px; }
.header-logo {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 300;
  letter-spacing: 0.12em;
  color: #F4F6F8;
  text-transform: uppercase;
}
.header-sep { width: 1px; height: 22px; background: rgba(255,255,255,0.14); }
.header-sub { font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: rgba(246,247,249,0.70); }
.header-time { font-size: 12px; color: rgba(246,247,249,0.72); letter-spacing: 0.06em; }
.header-status { display: flex; align-items: center; gap: 6px; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent-light); box-shadow: 0 0 0 3px rgba(183,206,218,0.18); }
.status-label { font-size: 11px; color: rgba(246,247,249,0.70); letter-spacing: 0.10em; text-transform: uppercase; }

/* ── NAV ── */
.nav {
  background: transparent;
  border-bottom: 1px solid rgba(17,19,24,0.06);
  display: flex;
  align-items: center;
  padding: 0 2.25rem;
  gap: 0;
}
.nav-item {
  padding: 18px 22px;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-soft);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
  font-weight: 400;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
}
.nav-item:hover { color: var(--text); }
.nav-item.active { color: var(--text); border-bottom-color: var(--accent); font-weight: 500; }

/* ── CONTENT ── */
.content { flex: 1; padding: 28px 36px; }

/* ── STATS BAR ── */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 22px;
  box-shadow: var(--shadow-line), var(--shadow-soft);
}
.stat-cell {
  background: var(--surface);
  padding: 18px 18px;
  text-align: center;
  border-right: 1px solid var(--border);
}
.stat-cell:last-child { border-right: none; }
.stat-val {
  font-family: var(--serif);
  font-size: 34px;
  font-weight: 300;
  line-height: 1;
  margin-bottom: 6px;
  color: var(--header-dark);
}
.stat-val.gold { color: var(--header-dark); }
.stat-val.rouge { color: var(--rouge-alerte); }
.stat-val.orange { color: var(--orange-warn); }
.stat-label { font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-soft); }

/* ── ALERT BANNER ── */
.alert-banner {
  margin-bottom: 14px;
  padding: 12px 16px;
  border-left: 3px solid var(--rouge-alerte);
  background: var(--rouge-bg);
  border: 1px solid rgba(139,32,32,0.16);
  border-left-width: 3px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--rouge-alerte);
  border-radius: 10px;
}
.alert-banner.warn { border-left-color: var(--orange-warn); background: var(--orange-bg); color: var(--orange-warn); border-color: rgba(122,74,0,0.16); }
.alert-icon { font-size: 14px; flex-shrink: 0; }
.alert-text strong { font-weight: 500; }

/* ── ZONES GRID ── */
.zones-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  background: transparent;
  border: none;
}
.zone-card {
  background: var(--surface);
  padding: 18px 20px;
  position: relative;
  cursor: pointer;
  transition: transform 0.18s, box-shadow 0.18s, border-color 0.18s;
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow-line), var(--shadow-soft);
}
.zone-card:hover { transform: translateY(-1px); border-color: rgba(143,175,194,0.55); }
zone-card::before {
  display: none;
}

.zone-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 1rem; }
.zone-name { font-family: var(--serif); font-size: 16px; font-weight: 500; letter-spacing: 0.03em; color: var(--header-dark); }
.zone-range { font-size: 11px; color: var(--text-soft); letter-spacing: 0.05em; margin-top: 2px; }

.zone-badge {
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 6px;
  font-weight: 500;
}
.badge-ok { background: rgba(183,206,218,0.30); color: var(--accent-dark); border: 1px solid rgba(143,175,194,0.45); }
.badge-warn { background: var(--orange-bg); color: var(--orange-warn); border: 1px solid rgba(122,74,0,0.18); }
.badge-danger { background: var(--rouge-bg); color: var(--rouge-alerte); border: 1px solid rgba(139,32,32,0.18); }
.badge-nodata { background: rgba(215,220,226,0.35); color: var(--text-soft); border: 1px solid rgba(215,220,226,0.9); }

.zone-temp {
  font-family: var(--serif);
  font-size: 46px;
  font-weight: 300;
  line-height: 1;
  margin-bottom: 10px;
  color: var(--accent-dark);
}
.zone-temp.danger-col { color: var(--rouge-alerte); }
.zone-temp.warn-col { color: var(--orange-warn); }
.zone-temp.nodata-col { color: var(--text-soft); font-size: 30px; }

.zone-meta { font-size: 11px; color: var(--text-soft); letter-spacing: 0.03em; line-height: 1.6; }
.zone-note { font-size: 11px; color: var(--text-soft); font-style: italic; margin-top: 4px; }

/* ── SAISIE ── */
.saisie-container { max-width: 640px; }
.saisie-title {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 300;
  letter-spacing: 0.08em;
  color: var(--header-dark);
  margin-bottom: 0.4rem;
}
.saisie-sub { font-size: 12px; color: var(--text-soft); letter-spacing: 0.05em; margin-bottom: 2rem; }
.form-sep { height: 1px; background: var(--border); margin: 1.5rem 0; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1rem; }
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group.full { grid-column: 1 / -1; }
.form-lbl { font-size: 10px; letter-spacing: 0.15em; text-transform: uppercase; color: var(--text-soft); }
.form-inp {
  font-family: var(--sans);
  font-size: 14px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.form-inp:focus { border-color: rgba(143,175,194,0.85); box-shadow: 0 0 0 3px rgba(183,206,218,0.40); }
.form-inp::placeholder { color: rgba(95,104,115,0.60); }
.form-inp:focus-visible { outline: none; }

.form-inp[type="date"], .form-inp[type="time"] { color-scheme: light; }

.btn-save {
  background: linear-gradient(180deg, rgba(143,175,194,0.22), rgba(143,175,194,0.10));
  color: var(--header-dark);
  border: 1px solid rgba(143,175,194,0.55);
  padding: 12px 28px;
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  cursor: pointer;
  font-family: var(--sans);
  border-radius: 10px;
  transition: background 0.2s, color 0.2s, transform 0.18s, border-color 0.2s;
  margin-top: 0.5rem;
}
.btn-save:hover { transform: translateY(-1px); border-color: rgba(95,126,146,0.55); background: linear-gradient(180deg, rgba(143,175,194,0.30), rgba(143,175,194,0.14)); }
.btn-ghost {
  background: transparent;
  color: var(--text-soft);
  border: 1px solid var(--border);
  padding: 12px 20px;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  font-family: var(--sans);
  border-radius: 10px;
  margin-top: 0.5rem;
  margin-left: 8px;
}
.btn-ghost:hover { border-color: rgba(143,175,194,0.55); color: var(--text); background: rgba(183,206,218,0.22); }
.save-feedback {
  font-size: 12px;
  color: var(--vert-ok);
  letter-spacing: 0.05em;
  margin-top: 8px;
  display: none;
}

/* ── HISTORIQUE ── */
.hist-filters { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 1.5rem; }
.hist-filters select, .hist-filters input[type=date] {
  font-family: var(--sans); font-size: 12px; padding: 8px 12px;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface); color: var(--text); outline: none;
  color-scheme: light;
}
.hist-quick { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.hist-chip {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-soft);
  padding: 8px 10px;
  border-radius: 999px;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s, transform 0.18s;
}
.hist-chip:hover { border-color: rgba(143,175,194,0.55); color: var(--text); background: rgba(183,206,218,0.22); }
.hist-chip.active { border-color: rgba(95,126,146,0.55); color: var(--header-dark); background: rgba(183,206,218,0.35); }
.hist-chip:active { transform: translateY(1px); }

.btn-export {
  margin-left: auto;
  background: transparent;
  border: 1px solid rgba(143,175,194,0.65);
  color: var(--accent-dark);
  padding: 8px 16px;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  font-family: var(--sans);
  border-radius: 10px;
}
.btn-export:hover { border-color: rgba(95,126,146,0.55); background: rgba(183,206,218,0.22); }
.btn-reset { margin-left: 0; }

.chart-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.chart-hint {
  font-size: 11px;
  color: var(--text-soft);
  letter-spacing: 0.02em;
  user-select: none;
}
.chart-area { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 1.5rem; margin-bottom: 1.5rem; box-shadow: var(--shadow-line), var(--shadow-soft); }
.hist-table-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow-line), var(--shadow-soft); }
.hist-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.hist-table th {
  text-align: left; padding: 10px 16px;
  font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-soft); border-bottom: 1px solid var(--border);
  background: var(--surface-alt); font-weight: 400;
}
.hist-table td { padding: 12px 16px; border-bottom: 1px solid rgba(215,220,226,0.85); color: var(--text); }
.hist-table tr:last-child td { border-bottom: none; }
.hist-table tr:hover td { background: rgba(183,206,218,0.22); }
.temp-pill {
  display: inline-block; padding: 2px 8px;
  border-radius: 2px; font-size: 12px; font-weight: 500;
  font-family: var(--serif);
}
.pill-ok { background: rgba(183,206,218,0.30); color: var(--accent-dark); border: 1px solid rgba(143,175,194,0.45); }
.pill-warn { background: var(--orange-bg); color: var(--orange-warn); border: 1px solid rgba(122,74,0,0.18); }
.pill-danger { background: var(--rouge-bg); color: var(--rouge-alerte); border: 1px solid rgba(139,32,32,0.18); }

/* ── PARAMÈTRES ── */
.param-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; margin-bottom: 1.5rem; box-shadow: var(--shadow-line), var(--shadow-soft); }
.param-card { background: var(--surface); padding: 1.5rem; }
.param-name { font-family: var(--serif); font-size: 15px; font-weight: 400; margin-bottom: 1rem; color: var(--header-dark); }
.param-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.param-lbl { font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-soft); }
.param-inp { font-family: var(--sans); font-size: 13px; text-align: right; width: 72px; padding: 6px 8px; border: 1px solid var(--border); border-radius: 8px; outline: none; background: var(--surface); color: var(--text); }
.param-inp:focus { border-color: rgba(143,175,194,0.85); box-shadow: 0 0 0 3px rgba(183,206,218,0.40); }

/* ── TOAST ── */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--header-dark); color: #F6F7F9;
  padding: 10px 20px; border-radius: 12px;
  font-size: 12px; letter-spacing: 0.08em;
  opacity: 0; transition: opacity 0.3s; pointer-events: none; z-index: 999;
  border: 1px solid rgba(255,255,255,0.10);
  white-space: nowrap;
  box-shadow: var(--shadow-soft);
}
.toast.show { opacity: 1; }

/* ── SECTION HIDDEN ── */
.section { display: none; }
.section.active { display: block; }

/* ── EMPTY STATE ── */
.empty { text-align: center; padding: 3rem; color: var(--text-soft); font-family: var(--serif); font-size: 16px; font-weight: 300; letter-spacing: 0.05em; }

/* ── BACKEND STATUS ── */
.backend-bar { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 12px 16px; margin-bottom: 1.5rem; display: flex; align-items: center; justify-content: space-between; box-shadow: var(--shadow-line), var(--shadow-soft); }
.backend-info { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--text-soft); letter-spacing: 0.05em; }
.backend-dot { width: 6px; height: 6px; border-radius: 50%; background: rgba(95,126,146,0.55); flex-shrink: 0; box-shadow: 0 0 0 3px rgba(183,206,218,0.18); }
.backend-dot.connected { background: var(--accent-dark); box-shadow: 0 0 0 3px rgba(183,206,218,0.22); }
.backend-dot.error { background: var(--rouge-alerte); }
.backend-config-btn { font-size: 11px; color: var(--accent-dark); letter-spacing: 0.1em; text-transform: uppercase; cursor: pointer; text-decoration: none; background: none; border: none; }
.backend-config-btn:hover { color: var(--header-dark); }