:root{
  --green: #3aa44a;
  --green-dark: #2e8a36;
  --muted: #7a7a7a;
  --bg: #f6f6f6;
  --card-bg: #ffffff;
  --shadow: 0 6px 18px rgba(0,0,0,0.08);
}

* { box-sizing: border-box; }

body{
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: #222;
  margin: 0;
  padding: 40px 20px;
}

/* Centralni kontejner */
.container{
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px;
}

/* Naslov */
h1{
  font-size: 44px;
  margin: 8px 0 28px;
  color: #333;
  font-weight: 700;
  letter-spacing: -0.5px;
}

/* Tablica studenata - vizual poput screenshot-a */
.students-table{
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: var(--shadow);
  margin-bottom: 36px;
}

/* Zeleni header */
.students-table thead th{
  background: var(--green);
  color: #fff;
  text-align: left;
  padding: 22px 24px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.2px;
}

/* Redovi */
.students-table tbody td{
  padding: 18px 24px;
  font-size: 18px;
  color: #222;
  vertical-align: middle;
  border-bottom: 1px solid #f0f0f0;
}

/* Ukloni donju liniju posljednjeg reda */
.students-table tbody tr:last-child td{
  border-bottom: none;
}

/* Stil za status (možeš dodati class="status-regular" ili "status-old" u PHP) */
.status-regular{
  color: #3aa44a;
  font-weight: 600;
}

.status-old{
  color: #d9534f;
  font-weight: 700;
}

/* Gumb za dodavanje / submit */
.btn, .submit-btn{
  display: inline-block;
  background: var(--green);
  color: #fff;
  padding: 14px 22px;
  border-radius: 6px;
  border: none;
  text-decoration: none;
  font-size: 18px;
  cursor: pointer;
  box-shadow: 0 6px 12px rgba(50,50,50,0.08);
  transition: background 0.15s ease, transform 0.08s ease;
}

.btn:hover, .submit-btn:hover{
  background: var(--green-dark);
  transform: translateY(-1px);
}

/* Forma i input polja */
form{
  background: transparent;
  margin-top: 6px;
}

input[type="text"],
input[type="number"],
select{
  padding: 10px 12px;
  border: 1px solid #e0e0e0;
  border-radius: 6px;
  font-size: 16px;
  outline: none;
  min-width: 200px;
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus{
  border-color: var(--green);
  box-shadow: 0 4px 12px rgba(58,164,74,0.06);
}