/* ===== RESET ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* ===== BODY ===== */
body {
  background: linear-gradient(135deg, #f3f6f9, #e9eef3);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ===== CARD CONTAINER ===== */
.cek-container {
  width: 100%;
  max-width: 720px;
  padding: 40px;
}

.cek-card {
  background: #ffffff;
  border-radius: 18px;
  padding: 50px 40px;
  text-align: center;
  box-shadow: 0 15px 40px rgba(0,0,0,0.08);
  transition: all 0.3s ease;
}

.cek-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.12);
}

/* ===== LOGO ===== */
.logo-sekolah {
  width: 90px;
  margin-bottom: 20px;
}

/* ===== TITLE ===== */
.cek-title {
  font-size: 32px;
  font-weight: 700;
  color: #2c3e50;
  margin-bottom: 10px;
}

.cek-subtitle {
  color: #7f8c8d;
  font-size: 16px;
  margin-bottom: 35px;
  line-height: 1.6;
}

/* ===== FORM BOX ===== */
.form-box {
  background: #f8fafc;
  padding: 25px;
  border-radius: 14px;
  border: 1px solid #eef2f6;
}

/* ===== LABEL ===== */
.form-box label {
  display: block;
  text-align: left;
  font-weight: 600;
  margin-bottom: 8px;
  color: #34495e;
}

/* ===== INPUT ===== */
.input-group {
  display: flex;
  gap: 12px;
}

.input-group input {
  flex: 1;
  padding: 14px 16px;
  border-radius: 10px;
  border: 1px solid #dcdfe6;
  font-size: 15px;
  outline: none;
  transition: all 0.25s ease;
}

.input-group input:focus {
  border-color: #2ecc71;
  box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.15);
}

/* ===== BUTTON ===== */
.btn-cek {
  padding: 14px 26px;
  border: none;
  border-radius: 10px;
  background: linear-gradient(135deg, #27ae60, #2ecc71);
  color: white;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.btn-cek:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(46, 204, 113, 0.35);
}

.btn-cek:active {
  transform: scale(0.97);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
  .cek-card {
    padding: 35px 20px;
  }

  .input-group {
    flex-direction: column;
  }

  .btn-cek {
    width: 100%;
  }
}