/* Page background and base font */
body {
  background-color: #eef1f5;
  font-family: Arial, Helvetica, sans-serif;
  margin: 0;
  padding: 20px;
}

/* White card that holds everything, centered on the page */
.container {
  background-color: #ffffff;
  max-width: 600px;
  margin: 30px auto;
  padding: 30px;
  border: 1px solid #e1e4e8;
  border-radius: 12px;
}

/* Big blue title */
h1 {
  color: #2f6b85;
  margin-top: 0;
}

/* Small grey line under the title */
.tagline {
  color: #6a737d;
  margin-top: 0;
  margin-bottom: 24px;
}

/* Each label + input pair */
.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  margin-bottom: 6px;
  font-weight: bold;
  color: #24292e;
}

.field input {
  width: 100%;
  box-sizing: border-box; /* so padding doesn't push the width past the card */
  padding: 10px;
  font-size: 16px;
  border: 1px solid #d1d5da;
  border-radius: 8px;
}

/* Row that holds the Calculate and Reset buttons */
.buttons {
  display: flex;
  gap: 10px;
  margin-top: 8px;
}

/* Buttons share a base look */
button {
  background-color: #2f6b85;
  color: #ffffff;
  border: none;
  padding: 10px 18px;
  font-size: 15px;
  border-radius: 8px;
  cursor: pointer;
}

button:hover {
  background-color: #25566b; /* a little darker on hover for feedback */
}

/* The lighter "secondary" buttons (Reset, Clear history) */
.secondary {
  background-color: #eef1f5;
  color: #2f6b85;
  border: 1px solid #cdd6dd;
}

.secondary:hover {
  background-color: #e2e8ee;
}

.small {
  padding: 6px 12px;
  font-size: 13px;
}

/* The current-result box */
.results {
  margin-top: 20px;
  padding: 14px;
  background-color: #f5f8fa;
  border-radius: 8px;
  white-space: pre-line; /* lets the \n line breaks from JS show as new lines */
  min-height: 22px;
  color: #24292e;
}

/* ===== HISTORY SECTION ===== */
.history-section {
  margin-top: 28px;
  border-top: 1px solid #e1e4e8;
  padding-top: 20px;
}

.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.history-header h2 {
  color: #2f6b85;
  font-size: 18px;
  margin: 0;
}

/* The derived session total line */
.summary {
  color: #6a737d;
  font-size: 14px;
  margin: 10px 0 14px 0;
}

/* The saved-splits list */
#history-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

#history-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  background-color: #f5f8fa;
  border-radius: 8px;
  margin-bottom: 8px;
  color: #24292e;
}

/* The greyed-out "nothing saved yet" message */
#history-list li.empty {
  color: #959da5;
  background-color: transparent;
  padding-left: 0;
  justify-content: flex-start;
}

/* Per-row remove button */
.remove-btn {
  background-color: transparent;
  color: #b62324;
  border: 1px solid #e6c3c3;
  padding: 4px 10px;
  font-size: 13px;
}

.remove-btn:hover {
  background-color: #fbeaea;
}