:root {
  --bg: #f3f5f9;
  --surface: #ffffff;
  --sidebar: #141a2b;
  --sidebar-text: #aab3c7;
  --text: #1a2035;
  --muted: #6a7389;
  --border: #e1e5ee;
  --primary: #2f6fed;
  --primary-dark: #2159c7;
  --success: #1f9d61;
  --success-bg: #e5f6ec;
  --danger: #d6404b;
  --danger-bg: #fdecee;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(20, 26, 43, .06), 0 4px 16px rgba(20, 26, 43, .05);
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
.hidden { display: none !important; }
.muted { color: var(--muted); margin: 0; }
.center { text-align: center; padding: 24px; }
code { background: #eef1f7; padding: 1px 6px; border-radius: 4px; font-size: 12px; }
h1 { font-size: 22px; margin: 0 0 4px; font-weight: 700; }
h2 { font-size: 18px; margin: 0 0 14px; }
a { color: var(--primary); }

/* ---------- Login ---------- */
.login { position: fixed; inset: 0; display: grid; place-items: center; background: var(--sidebar); padding: 16px; }
.login-card { background: var(--surface); padding: 32px; border-radius: 16px; width: 100%; max-width: 360px; display: grid; gap: 14px; box-shadow: 0 20px 60px rgba(0,0,0,.35); }
.login-card .logo { color: var(--text); font-size: 20px; }

/* ---------- Layout ---------- */
.app { display: flex; min-height: 100vh; }
.sidebar {
  width: 230px; flex-shrink: 0; background: var(--sidebar); color: var(--sidebar-text);
  padding: 22px 14px; display: flex; flex-direction: column; gap: 6px; position: sticky; top: 0; height: 100vh;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; color: #fff; padding: 4px 10px 22px; }
.logo-icon { width: 28px; height: 28px; border-radius: 8px; background: linear-gradient(135deg, var(--primary), #7c4dff); display: inline-block; position: relative; }
.logo-icon::after { content: ''; position: absolute; inset: 7px 6px; border: 2px solid #fff; border-radius: 3px; border-top-width: 0; background: linear-gradient(to bottom right, transparent 48%, #fff 48%, #fff 52%, transparent 52%), linear-gradient(to bottom left, transparent 48%, #fff 48%, #fff 52%, transparent 52%); background-size: 50% 60%, 50% 60%; background-position: left top, right top; background-repeat: no-repeat; }
nav { display: flex; flex-direction: column; gap: 4px; }
.nav-item {
  display: flex; align-items: center; gap: 12px; width: 100%; text-align: left; background: none; border: 0;
  color: var(--sidebar-text); font: inherit; font-weight: 500; padding: 11px 12px; border-radius: 10px; cursor: pointer;
  transition: background .15s, color .15s;
}
.nav-item svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.nav-item:hover { background: rgba(255,255,255,.06); color: #fff; }
.nav-item.active { background: var(--primary); color: #fff; }
.nav-item.logout { margin-top: auto; }

.content { flex: 1; padding: 32px 40px 60px; max-width: 1180px; width: 100%; }
.view-head { margin-bottom: 22px; }
.view-head.row, .row { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* ---------- Cards & forms ---------- */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; }
.compose { display: grid; gap: 16px; }
label { display: grid; gap: 6px; font-weight: 500; font-size: 13px; color: #3a4258; }
label.check { grid-template-columns: auto 1fr; align-items: center; gap: 10px; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=search], select, textarea {
  width: 100%; font: inherit; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; background: #fff; color: var(--text);
  transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(47,111,237,.15); }
textarea { resize: vertical; font-family: ui-monospace, Consolas, monospace; font-size: 12px; }
input[type=file] { font: inherit; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.span-2 { grid-column: span 2; }
.input-row { display: flex; gap: 10px; align-items: center; }
.input-row > input, .input-row > select { flex: 1; }
.label-title { font-weight: 600; font-size: 13px; margin: 0 0 10px; }
.hint { font-size: 12px; color: var(--muted); margin: -4px 0 0; min-height: 1em; }

.btn {
  display: inline-flex; align-items: center; gap: 8px; font: inherit; font-weight: 600; padding: 10px 16px; border-radius: 8px;
  border: 1px solid transparent; cursor: pointer; transition: background .15s, transform .05s; white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.ghost { background: #fff; border-color: var(--border); color: var(--text); }
.btn.ghost:hover { background: #f5f7fb; }
.btn.danger { background: var(--danger-bg); color: var(--danger); }
.btn.danger:hover { background: #fbd9dd; }
.btn.small { padding: 7px 12px; font-size: 13px; }
.btn.full { width: 100%; justify-content: center; }
.btn:disabled { opacity: .6; cursor: progress; }
.file-btn { cursor: pointer; }
.actions { display: flex; gap: 10px; align-items: center; margin-top: 6px; }
.spacer { flex: 1; }

/* Tabs */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); }
.tab { background: none; border: 0; font: inherit; font-weight: 600; color: var(--muted); padding: 10px 14px; cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.mode { display: grid; gap: 14px; }

/* Quill */
#editor { min-height: 260px; font-size: 14px; }
.ql-toolbar.ql-snow { border-radius: 8px 8px 0 0; border-color: var(--border); background: #fafbfd; }
.ql-container.ql-snow { border-radius: 0 0 8px 8px; border-color: var(--border); font-family: inherit; }

/* Variables & aperçu */
.variables { background: #f7f9fd; border: 1px solid var(--border); border-radius: 10px; padding: 16px; }
.preview iframe, #previewModalFrame { width: 100%; height: 420px; border: 1px solid var(--border); border-radius: 8px; background: #fff; }
#previewModalFrame { height: 60vh; }

/* Listes */
.file-list { list-style: none; margin: -8px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.file-list li { background: #eef1f7; padding: 4px 10px; border-radius: 6px; font-size: 12px; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; }
.item-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px 20px; display: grid; gap: 8px; }
.item-card h3 { margin: 0; font-size: 15px; }
.item-card .sub { color: var(--muted); font-size: 13px; word-break: break-all; }
.item-card .actions { flex-wrap: wrap; margin-top: 8px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { background: #e8efff; color: var(--primary-dark); padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.empty { grid-column: 1 / -1; }

/* Table */
.table-wrap { padding: 0; overflow: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--border); font-size: 13px; }
th { font-weight: 600; color: var(--muted); background: #fafbfd; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
tbody tr { cursor: pointer; }
tbody tr:hover { background: #f7f9fd; }
td.ellipsis { max-width: 280px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.badge { display: inline-block; padding: 3px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge.ok { background: var(--success-bg); color: var(--success); }
.badge.ko { background: var(--danger-bg); color: var(--danger); }

/* Modales */
.modal { position: fixed; inset: 0; background: rgba(20, 26, 43, .55); display: grid; place-items: center; padding: 16px; z-index: 50; overflow: auto; }
.modal-card { background: var(--surface); border-radius: 16px; padding: 28px; width: 100%; max-width: 620px; display: grid; gap: 14px; box-shadow: 0 24px 80px rgba(0,0,0,.35); max-height: calc(100vh - 32px); overflow: auto; }
.modal-card.wide { max-width: 900px; }
.meta { font-size: 13px; color: var(--muted); display: grid; gap: 3px; }
.meta b { color: var(--text); }
.feedback { margin: 0; font-size: 13px; min-height: 1em; }
.feedback.ok { color: var(--success); }
.feedback.ko { color: var(--danger); }
.error { color: var(--danger); margin: 0; font-size: 13px; min-height: 1em; }

/* Toast */
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); background: var(--text); color: #fff; padding: 12px 20px; border-radius: 10px; font-weight: 500; box-shadow: 0 10px 30px rgba(0,0,0,.3); z-index: 100; max-width: 90vw; }
.toast.ok { background: var(--success); }
.toast.ko { background: var(--danger); }

/* Responsive */
@media (max-width: 860px) {
  .app { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: static; padding: 12px; flex-direction: row; flex-wrap: wrap; align-items: center; }
  .logo { padding: 4px 8px; width: 100%; }
  nav { flex-direction: row; flex-wrap: wrap; }
  .nav-item { width: auto; padding: 8px 10px; }
  .nav-item.logout { margin-top: 0; }
  .content { padding: 20px 16px 40px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .span-2 { grid-column: auto; }
}

/* Choix de l'expéditeur */
.sender-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.sender-head .label-title { margin: 0; font-size: 14px; }
.sender-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(380px, 1fr)); gap: 14px; margin-bottom: 22px; }
.sender-card { background: var(--surface); border: 2px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px 18px; display: flex; align-items: center; gap: 14px; cursor: pointer; transition: border-color .15s, transform .05s; }
.sender-card:hover { border-color: #b9c8f0; }
.sender-card.selected { border-color: var(--primary); background: #f3f6ff; }
.sender-card .avatar { width: 42px; height: 42px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), #7c4dff); color: #fff; display: grid; place-items: center; font-weight: 700; font-size: 16px; flex-shrink: 0; text-transform: uppercase; }
.sender-card .info { flex: 1; min-width: 0; }
.sender-card .info h3 { margin: 0 0 2px; font-size: 14px; }
.sender-card .info .sub { font-size: 12px; word-break: break-all; }
.sender-card .btn { flex-shrink: 0; }
.sender-banner { display: flex; align-items: center; justify-content: space-between; gap: 12px; background: #eef3ff; border: 1px solid #d5e0fb; color: var(--primary-dark); border-radius: 10px; padding: 10px 14px; font-size: 13px; }
.sender-banner b { color: var(--text); }

/* Encart d'aide (Titan) */
.help-box { background: #fff8e6; border: 1px solid #f3dca0; border-radius: 10px; padding: 12px 14px; font-size: 13px; color: #5a4a1e; }
.help-box ol { margin: 8px 0 0; padding-left: 20px; display: grid; gap: 4px; }
.help-box a { color: var(--primary-dark); }

.var-code { font-family: ui-monospace, Consolas, monospace; font-size: 11px; color: var(--muted); font-weight: 400; margin-left: 4px; }

/* Titres d'étapes dans le formulaire d'envoi */
.step-title { font-weight: 700; font-size: 14px; margin: 8px 0 2px; color: var(--text); padding-top: 14px; border-top: 1px solid var(--border); }
.step-title.tight { padding-top: 0; border-top: 0; margin-top: 0; }
.sender-banner + .step-title { padding-top: 0; border-top: 0; }