:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --border: #e3e5ec;
  --text: #1f2330;
  --muted: #767a8a;
  --accent: #4a5cff;
  --accent-dark: #3646d4;
  --success: #1ba672;
  --error: #e2504a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.layout { display: flex; min-height: 100vh; }

nav.sidebar {
  width: 220px;
  background: var(--card);
  border-right: 1px solid var(--border);
  padding: 24px 16px;
  flex-shrink: 0;
}

nav.sidebar h1 {
  font-size: 18px;
  margin: 0 0 24px 8px;
}

nav.sidebar a {
  display: block;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  margin-bottom: 4px;
}

nav.sidebar a:hover, nav.sidebar a.active {
  background: #eef0ff;
  color: var(--accent-dark);
}

main {
  flex: 1;
  padding: 32px 40px;
  max-width: 980px;
}

h2 { margin-top: 0; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 20px;
}

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }

input[type=text], input[type=email], input[type=password], input[type=number],
input[type=date], textarea, select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 14px;
  font-family: inherit;
}

textarea { min-height: 220px; font-family: ui-monospace, monospace; font-size: 13px; }

label { font-size: 13px; font-weight: 600; color: var(--muted); display: block; margin-bottom: 4px; }

.btn {
  display: inline-block;
  background: var(--accent);
  color: white;
  border: none;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { background: var(--accent-dark); }
.btn.secondary { background: #eee; color: var(--text); }
.btn.danger { background: var(--error); }

.tag {
  display: inline-block;
  background: #eef0ff;
  color: var(--accent-dark);
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 12px;
  margin-right: 4px;
}

.badge { padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge.draft { background: #eee; color: #555; }
.badge.sending { background: #fff3cd; color: #8a6500; }
.badge.sent { background: #d7f4e7; color: var(--success); }
.badge.error { background: #fde2e1; color: var(--error); }

.flash { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.flash.success { background: #d7f4e7; color: var(--success); }
.flash.error { background: #fde2e1; color: var(--error); }

.stat-row { display: flex; gap: 24px; margin-bottom: 20px; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px 20px; flex: 1; }
.stat .num { font-size: 24px; font-weight: 700; }
.stat .lbl { font-size: 12px; color: var(--muted); text-transform: uppercase; }

.login-wrap { display: flex; align-items: center; justify-content: center; height: 100vh; }
.login-box { width: 320px; }

.hint { font-size: 12px; color: var(--muted); margin-top: -8px; margin-bottom: 14px; }

/* Rich-Text-Editor (Quill) */
.mail-editor { background: #fff; border-radius: 0 0 8px 8px; }
.mail-editor .ql-editor { min-height: 260px; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; font-size: 14px; color: #1f2330; }
.ql-toolbar.ql-snow { border-radius: 8px 8px 0 0; background: #f3f4f8; border-color: var(--border); }
.ql-container.ql-snow { border-color: var(--border); }