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

:root {
  --sb-bg: #f9fafb;
  --sb-card-bg: #ffffff;
  --sb-text: #111827;
  --sb-muted: #6b7280;
  --sb-border: #e5e7eb;
  --sb-radius: 16px;
  --sb-shadow: 0 1px 2px rgba(0,0,0,0.05);
  --sb-primary: #2563eb;
  --sb-primary-hover: #1d4ed8;
}

body {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--sb-bg);
  color: var(--sb-text);
  min-height: 100vh;
  padding: 24px;
  line-height: 1.5;
}

@media (min-width: 768px) {
  body {
    padding: 32px 48px;
  }
}

a { color: var(--sb-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
.sb-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 32px;
}
.sb-logo {
  width: 48px;
  height: 48px;
  background: var(--sb-primary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.sb-logo svg { width: 24px; height: 24px; }
.sb-header-text h1 { font-size: 22px; font-weight: 700; color: var(--sb-text); line-height: 1.2; }
.sb-header-text p { font-size: 14px; color: var(--sb-muted); font-weight: 400; }

/* Back link */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--sb-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 24px;
  max-width: 680px;
  transition: color 0.15s ease;
}
.back-link:hover { color: var(--sb-primary); text-decoration: none; }

/* Cards */
.sb-card {
  background: var(--sb-card-bg);
  border: 1px solid var(--sb-border);
  border-radius: var(--sb-radius);
  padding: 24px;
  box-shadow: var(--sb-shadow);
}
.app-card {
  max-width: 680px;
  margin: 0 auto;
  background: var(--sb-card-bg);
  border: 1px solid var(--sb-border);
  border-radius: var(--sb-radius);
  padding: 24px;
  box-shadow: var(--sb-shadow);
}
.app-card h2 { font-size: 18px; font-weight: 700; margin-bottom: 16px; color: var(--sb-text); }
.app-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 12px; color: var(--sb-text); }
.app-card p { font-size: 14px; color: var(--sb-muted); margin-bottom: 16px; line-height: 1.5; }
.app-card .small { color: var(--sb-muted); font-size: 13px; margin-top: 12px; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 13px; font-weight: 600; color: var(--sb-text); margin-bottom: 6px; }
.form-input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--sb-border);
  border-radius: 10px;
  font-size: 14px;
  font-family: inherit;
  background: var(--sb-bg);
  color: var(--sb-text);
  box-sizing: border-box;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.form-input:focus {
  outline: none;
  border-color: var(--sb-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}
.form-input::placeholder { color: var(--sb-muted); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--sb-primary);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s ease;
  text-decoration: none;
}
.btn:hover { background: var(--sb-primary-hover); text-decoration: none; }
.btn-secondary {
  background: var(--sb-muted);
}
.btn-secondary:hover { background: #5b6370; }
.btn-block { width: 100%; }

/* Utility */
.text-center { text-align: center; }
.text-muted { color: var(--sb-muted); }
.mt-16 { margin-top: 16px; }
.mb-16 { margin-bottom: 16px; }

/* App container */
.app-container {
  max-width: 680px;
  margin: 0 auto;
}

/* App cards */
.sb-card {
  display: flex;
  align-items: center;
  gap: 18px;
  background: var(--sb-card-bg);
  border: 1px solid var(--sb-border);
  border-radius: var(--sb-radius);
  padding: 18px 22px;
  cursor: pointer;
  box-shadow: var(--sb-shadow);
  transition: box-shadow 0.15s ease;
}
.sb-card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}
.sb-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sb-icon svg {
  width: 22px;
  height: 22px;
}
.sb-card-body h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--sb-text);
  margin-bottom: 3px;
}
.sb-card-body p {
  font-size: 13px;
  color: var(--sb-muted);
  line-height: 1.4;
}
.sb-container {
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Shared app styles */
.container { max-width: 900px; margin: 0 auto; padding: 48px 24px; }
.card { background: var(--sb-card-bg); border: 1px solid var(--sb-border); border-radius: var(--sb-radius); padding: 20px; margin-bottom: 16px; box-shadow: var(--sb-shadow); }
.nav { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; padding: 12px 0; border-bottom: 1px solid var(--sb-border); }
.nav a { padding: 8px 16px; border-radius: 8px; font-size: 14px; font-weight: 500; color: var(--sb-text); text-decoration: none; transition: all 0.15s ease; }
.nav a:hover { background: var(--sb-bg); color: var(--sb-primary); }
.nav a.active { background: var(--sb-primary); color: #fff; }
.alert { padding: 12px 16px; border-radius: 10px; margin-bottom: 16px; font-size: 14px; }
.alert-success { background: #f0fdf4; border: 1px solid #bbf7d0; color: #166534; }
.alert-error { background: #fef2f2; border: 1px solid #fecaca; color: #b91c1c; }
.muted { color: var(--sb-muted); font-size: 13px; }
table { width: 100%; border-collapse: collapse; margin: 16px 0; }
table th, table td { padding: 10px 12px; border: 1px solid var(--sb-border); text-align: left; font-size: 14px; }
table th { background: var(--sb-bg); font-weight: 600; }
table tr:hover td { background: #f9fafb; }

/* Additional holidays styles */
.btn-danger { background: #dc2626; color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-success { background: #16a34a; color: #fff; }
.btn-success:hover { background: #15803d; }
.btn-secondary { background: #64748b; color: #fff; }
.btn-secondary:hover { background: #475569; }
.table-wrap { overflow-x: auto; }
.muted { color: var(--sb-muted); font-size: 13px; }

/* Tables */
table { width: 100%; border-collapse: collapse; margin: 16px 0; }
table th, table td { padding: 10px 12px; border: 1px solid var(--sb-border); text-align: left; font-size: 14px; }
table th { background: var(--sb-bg); font-weight: 600; }
table tr:hover td { background: #f9fafb; }

/* Forms */
input[type="text"], input[type="email"], input[type="password"], input[type="date"], input[type="number"], textarea, select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--sb-border);
  border-radius: 10px;
  font-size: 14px;
  font-family: inherit;
  background: var(--sb-bg);
  color: var(--sb-text);
  box-sizing: border-box;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--sb-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}
label { display: block; font-size: 13px; font-weight: 600; color: var(--sb-text); margin-bottom: 6px; }

/* Staffdetails specific */
.messages { margin-top: 16px; padding: 12px 16px; border-radius: 12px; background: #eef4ff; border: 1px solid #c8daf7; }
.messages li { margin-bottom: 6px; font-size: 14px; }
.status { font-size: 14px; margin: 8px 0; color: var(--sb-text); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin: 16px 0; }
.email-card { margin-top: 16px; }

/* Form inputs - target inputs directly */
input[name="staff_id"],
input[name="full_name"],
input[name="department"],
input[name="position"],
input[name="workNumber"],
input[name="emailRecipient"],
input[type="text"],
input[type="email"],
input[type="password"],
input[type="date"],
input[type="number"],
input[type="file"],
textarea,
select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--sb-border);
  border-radius: 10px;
  font-size: 14px;
  font-family: inherit;
  background: var(--sb-bg);
  color: var(--sb-text);
  box-sizing: border-box;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  margin-bottom: 12px;
}
input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--sb-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}
input[type="checkbox"] {
  width: auto;
  margin-right: 8px;
}
label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--sb-text);
  margin-bottom: 6px;
}
button[type="submit"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  background: var(--sb-primary);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s ease;
  margin-top: 8px;
}
button[type="submit"]:hover {
  background: var(--sb-primary-hover);
}

/* Submit inputs */
input[type="submit"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  background: var(--sb-primary);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s ease;
  margin-top: 8px;
}
input[type="submit"]:hover {
  background: var(--sb-primary-hover);
}

/* Messages / Info box */
.messages {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 12px;
  padding: 16px 20px;
  margin: 16px 0;
}
.messages strong {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--sb-text);
  margin-bottom: 8px;
}
.messages ul {
  margin: 0;
  padding-left: 20px;
}
.messages li {
  font-size: 14px;
  color: #1e40af;
  margin-bottom: 4px;
}

/* Date input styling */
input[type="date"],
input[type="month"],
input[type="time"],
input[type="week"] {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--sb-border);
  border-radius: 10px;
  font-size: 14px;
  font-family: inherit;
  background: var(--sb-bg);
  color: var(--sb-text);
  box-sizing: border-box;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  height: 42px;
}
input[type="date"]:focus,
input[type="month"]:focus {
  outline: none;
  border-color: var(--sb-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* File input styling */
input[type="file"] {
  padding: 8px 12px;
  border: 1px dashed var(--sb-border);
  border-radius: 10px;
  background: var(--sb-bg);
  font-size: 14px;
  width: 100%;
  box-sizing: border-box;
}