:root {
  --wa: #25D366;
  --wa-dark: #128C7E;
  --wa-deep: #075E54;
  --wa-light: #DCF8C6;
  --wa-bg: #ECE5DD;
  --wa-pattern: #d9fdd3;
  --surface: #ffffff;
  --bg: #f0f2f5;
  --text: #111b21;
  --text-soft: #667781;
  --border: #e9edef;
  --danger: #ea0038;
  --shadow: 0 4px 24px rgba(17, 27, 33, 0.08);
  --radius: 14px;
  --font: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html, body, #app { height: 100%; margin: 0; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

.app-loading {
  display: flex; align-items: center; justify-content: center;
  height: 100vh; background: var(--bg);
}
.loading-spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--wa);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Auth */
.auth-screen {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 1.5rem;
  background: linear-gradient(145deg, var(--wa-deep) 0%, #0a3d36 40%, #111b21 100%);
}
.auth-card {
  width: 100%; max-width: 420px;
  background: var(--surface);
  border-radius: 20px;
  padding: 2rem;
  box-shadow: 0 24px 64px rgba(0,0,0,0.25);
}
.auth-logo {
  display: flex; align-items: center; gap: 0.65rem;
  margin-bottom: 1.5rem;
}
.auth-logo-icon {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--wa), var(--wa-dark));
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: 1.4rem;
}
.auth-logo span { font-weight: 800; font-size: 1.35rem; letter-spacing: -0.02em; }
.auth-tagline { color: var(--text-soft); font-size: 0.95rem; margin: 0 0 1.5rem; }
.auth-input {
  width: 100%; padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  font: inherit; font-size: 1rem;
  margin-bottom: 0.75rem;
}
.auth-input:focus { outline: none; border-color: var(--wa); box-shadow: 0 0 0 3px rgba(37,211,102,0.15); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  padding: 0.75rem 1.25rem;
  border: none; border-radius: 12px;
  font: inherit; font-weight: 700; font-size: 0.95rem;
  cursor: pointer; transition: transform 0.12s, opacity 0.12s;
}
.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-wa {
  width: 100%;
  background: linear-gradient(135deg, var(--wa), var(--wa-dark));
  color: white;
  box-shadow: 0 8px 24px rgba(37,211,102,0.35);
}
.btn-ghost { background: transparent; color: var(--text-soft); }
.btn-sm { padding: 0.4rem 0.75rem; font-size: 0.82rem; border-radius: 8px; }
.btn-outline {
  background: white; border: 1px solid var(--border); color: var(--text);
}

/* Shell */
.shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  height: 100vh;
  overflow: hidden;
}
@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .shell-nav { display: none; }
  .shell-nav.open { display: flex; position: fixed; inset: 0; z-index: 100; }
}

.shell-nav {
  background: var(--wa-deep);
  color: white;
  display: flex; flex-direction: column;
  padding: 1.25rem 1rem;
}
.nav-brand {
  display: flex; align-items: center; gap: 0.6rem;
  padding: 0.5rem 0.75rem;
  margin-bottom: 1.5rem;
}
.nav-brand-icon {
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.15);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
}
.nav-brand strong { font-size: 1.1rem; }
.nav-item {
  display: flex; align-items: center; gap: 0.65rem;
  padding: 0.7rem 0.85rem;
  border-radius: 10px;
  color: rgba(255,255,255,0.75);
  cursor: pointer; border: none; background: none;
  font: inherit; font-weight: 600; font-size: 0.9rem;
  width: 100%; text-align: left;
  transition: background 0.12s;
}
.nav-item:hover, .nav-item.active {
  background: rgba(255,255,255,0.12);
  color: white;
}
.nav-spacer { flex: 1; }
.nav-user {
  padding: 0.85rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
}

.shell-main { display: flex; flex-direction: column; overflow: hidden; background: var(--bg); }

/* Inbox */
.inbox {
  display: grid;
  grid-template-columns: minmax(280px, 360px) 1fr;
  flex: 1;
  overflow: hidden;
  gap: 0;
}
@media (max-width: 768px) {
  .inbox { grid-template-columns: 1fr; }
  .inbox-list.hidden-mobile { display: none; }
  .inbox-thread.hidden-mobile { display: none; }
}

.panel {
  background: var(--surface);
  display: flex; flex-direction: column;
  overflow: hidden;
  border-right: 1px solid var(--border);
}
.panel-head {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between; gap: 0.5rem;
}
.panel-head strong { font-size: 0.95rem; }
.panel-scroll { flex: 1; overflow-y: auto; }

.conv-item {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.1s;
}
.conv-item:hover { background: #f5f6f6; }
.conv-item.active {
  background: #f0f2f5;
  border-left: 3px solid var(--wa);
}
.conv-top { display: flex; justify-content: space-between; gap: 0.5rem; }
.conv-name { font-weight: 700; font-size: 0.9rem; }
.conv-time { font-size: 0.72rem; color: var(--text-soft); }
.conv-preview { font-size: 0.82rem; color: var(--text-soft); margin-top: 0.2rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.badge-unread {
  background: var(--wa); color: white;
  font-size: 0.68rem; font-weight: 700;
  padding: 0.1rem 0.45rem; border-radius: 999px;
}

/* Chat thread */
.thread-bg {
  flex: 1; overflow-y: auto;
  padding: 1rem;
  background: var(--wa-bg);
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23d1d7db' fill-opacity='0.25'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.msg-row { display: flex; margin-bottom: 0.5rem; }
.msg-row.out { justify-content: flex-end; }
.msg-bubble {
  max-width: 75%;
  padding: 0.55rem 0.75rem 0.35rem;
  border-radius: 8px;
  font-size: 0.9rem;
  line-height: 1.45;
  box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}
.msg-row.in .msg-bubble { background: white; border-top-left-radius: 0; }
.msg-row.out .msg-bubble { background: var(--wa-light); border-top-right-radius: 0; }
.msg-meta { font-size: 0.65rem; color: var(--text-soft); text-align: right; margin-top: 0.15rem; display: flex; align-items: center; justify-content: flex-end; gap: 0.25rem; }
.msg-status { color: var(--wa-dark); }

.compose {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border);
  background: var(--surface);
  display: flex; gap: 0.5rem; align-items: flex-end;
}
.compose textarea {
  flex: 1; resize: none;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.65rem 0.85rem;
  font: inherit; font-size: 0.95rem;
  min-height: 44px; max-height: 120px;
}
.compose textarea:focus { outline: none; border-color: var(--wa); }

.toast {
  position: fixed; bottom: 1.5rem; right: 1.5rem;
  background: var(--text); color: white;
  padding: 0.75rem 1.1rem; border-radius: 12px;
  font-size: 0.88rem; font-weight: 600;
  box-shadow: var(--shadow);
  z-index: 9999;
  animation: slideUp 0.25s ease;
}
.toast.error { background: var(--danger); }
@keyframes slideUp { from { transform: translateY(12px); opacity: 0; } }

.empty-state {
  padding: 2.5rem 1.5rem;
  text-align: center;
  color: var(--text-soft);
  font-size: 0.92rem;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  padding: 1.25rem;
}
.stat-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.1rem;
  border: 1px solid var(--border);
}
.stat-card .val { font-size: 1.75rem; font-weight: 800; color: var(--wa-dark); }
.stat-card .lbl { font-size: 0.78rem; color: var(--text-soft); margin-top: 0.2rem; }

.template-row {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center; gap: 0.75rem;
}
.template-row strong { font-size: 0.88rem; }
.template-row small { color: var(--text-soft); display: block; margin-top: 0.15rem; }

/* Lignes WhatsApp */
.lines-view { flex: 1; overflow: auto; background: var(--bg); }
.lines-head { background: white; border-bottom: 1px solid var(--border); align-items: flex-start; }
.lines-sub { margin: 0.25rem 0 0; font-size: 0.78rem; color: var(--text-soft); font-weight: 400; }
.lines-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  padding: 1.25rem;
}
.line-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  box-shadow: 0 1px 3px rgba(17, 27, 33, 0.04);
}
.line-card.line-active { border-color: rgba(37, 211, 102, 0.45); box-shadow: 0 0 0 1px rgba(37, 211, 102, 0.12); }
.line-card-top { display: flex; justify-content: space-between; align-items: center; gap: 0.5rem; }
.line-phone { font-family: ui-monospace, monospace; font-weight: 700; font-size: 1rem; }
.line-label { margin-top: 0.35rem; font-size: 0.88rem; color: var(--text-soft); }
.line-meta { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-top: 0.65rem; }
.line-tag {
  font-size: 0.68rem; font-weight: 600;
  padding: 0.15rem 0.45rem; border-radius: 999px;
  background: #f0f2f5; color: var(--text-soft);
}
.line-tag-ok { background: rgba(37, 211, 102, 0.15); color: var(--wa-deep); }
.line-error { margin-top: 0.65rem; font-size: 0.78rem; color: var(--danger); line-height: 1.4; }
.line-status {
  font-size: 0.68rem; font-weight: 700;
  padding: 0.15rem 0.5rem; border-radius: 999px; white-space: nowrap;
}
.status-ok { background: rgba(37, 211, 102, 0.18); color: var(--wa-deep); }
.status-warn { background: #fef3c7; color: #92400e; }
.status-info { background: #dbeafe; color: #1e40af; }
.status-err { background: #fee2e2; color: #b91c1c; }
.status-gray { background: #f0f2f5; color: var(--text-soft); }