:root {
  --bg: #f3f4f6;
  --card: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --primary: #1f2937;
  --primary-light: #374151;
  --danger: #dc2626;
  --border: #e5e7eb;
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

/* LOGIN */

.login-card {
  width: 92%;
  max-width: 380px;
  margin: 80px auto;
  background: var(--card);
  padding: 28px;
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  text-align: center;
}

.login-card h1 {
  margin-bottom: 8px;
}

.login-card p {
  color: var(--muted);
}

/* DASHBOARD */

.dashboard {
  max-width: 900px;
  margin: 0 auto;
  padding: 16px;
  padding-bottom: 90px;
}

#pageTitle {
  margin: 10px 0 4px;
  font-size: 24px;
}

#userInfo {
  margin-top: 0;
  color: var(--muted);
  font-size: 14px;
}

/* TABOVI */

.tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 0;
  margin-bottom: 14px;
}

.tabs button {
  white-space: nowrap;
  flex: 0 0 auto;
}

/* SADRŽAJ */

.content {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.06);
}

.content h2 {
  margin-top: 0;
  font-size: 21px;
}

.content h3 {
  margin-bottom: 8px;
}

/* FORME */

input,
select,
textarea {
  width: 100%;
  padding: 13px;
  margin: 7px 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 15px;
  background: #fff;
}

textarea {
  resize: vertical;
}

button {
  padding: 12px 14px;
  border: none;
  border-radius: 12px;
  background: var(--primary);
  color: white;
  font-size: 15px;
  cursor: pointer;
  margin: 4px 4px 4px 0;
}

button:hover {
  background: var(--primary-light);
}

button[style*="background:#dc2626"] {
  background: var(--danger) !important;
}

/* KARTICE */

.content div[style*="border:1px solid #ddd"] {
  border: 1px solid var(--border) !important;
  border-radius: 14px !important;
  background: #fafafa;
}

a {
  color: #2563eb;
  text-decoration: none;
  font-weight: 600;
}

/* ODJAVA */

.logout-btn {
  width: 100%;
  margin-top: 18px;
  background: #991b1b;
}

/* MOBILNI DONJI MENI */

@media (max-width: 768px) {
  .dashboard {
    padding: 14px;
    padding-bottom: 95px;
  }

  .tabs {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 50;
    background: white;
    border-top: 1px solid var(--border);
    padding: 8px;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    overflow: visible;
  }

  .tabs button {
    font-size: 12px;
    padding: 10px 6px;
    border-radius: 10px;
  }

  #adminUsersBtn {
    grid-column: span 4;
  }

  .content {
    padding: 14px;
  }

  button {
    width: 100%;
    margin-top: 8px;
  }

  .content a {
    display: inline-block;
    margin-top: 8px;
  }
}