:root {
  /* Apple-style Light Theme (Default) */
  --bg-color: #f5f5f7;
  --card-bg: #ffffff;
  --border-color: #d2d2d7;
  --text-primary: #1d1d1f;
  --text-secondary: #86868b;
  --accent-color: #0071e3; /* Apple Blue */
  --accent-hover: #0077ed;
  --success-color: #34c759; /* Apple Green */
  --danger-color: #ff3b30; /* Apple Red */
  --input-bg: #ffffff;
  --input-border: #d2d2d7;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --radius-md: 12px; /* Softer, Apple-like corners */
  --radius-sm: 8px;
  --header-bg: rgba(245, 245, 247, 0.8);
  --backdrop-blur: 20px;
}

[data-theme="dark"] {
  /* Apple-style Dark Theme */
  --bg-color: #000000;
  --card-bg: #1c1c1e;
  --border-color: #38383a;
  --text-primary: #f5f5f7;
  --text-secondary: #86868b;
  --accent-color: #0a84ff; /* Apple Dark Mode Blue */
  --accent-hover: #409cff;
  --success-color: #30d158;
  --danger-color: #ff453a;
  --input-bg: #2c2c2e;
  --input-border: #38383a;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.2);
  --header-bg: rgba(0, 0, 0, 0.8);
}

* {
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased; /* Crisp text */
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Helvetica, Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.5;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
  /* Removed padding-top since header is no longer fixed */
}

header {
  /* Removed fixed positioning to save screen space */
  position: relative; 
  height: auto;
  padding: 16px 0;
  margin-bottom: 24px;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 10;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-user-info {
    display: flex;
    align-items: center;
    font-size: 13px;
    gap: 12px;
}

#currentUserDisp {
    font-family: "SF Mono", monospace;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

h1 {
  font-size: 20px;
  font-weight: 600;
  margin: 0;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.grid-dashboard {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 992px) {
  .grid-dashboard {
    grid-template-columns: 320px 1fr;
  }
}

/* Cards */
.card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
  border: none; /* Apple style prefers shadow over border for cards */
}

/* For Dark mode, maybe add a subtle border since shadows are less visible */
[data-theme="dark"] .card {
    border: 1px solid var(--border-color);
}

.card-header {
  font-weight: 600;
  font-size: 17px; /* Apple Standard Headline */
  margin-bottom: 20px;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 0; /* Remove border line for cleaner look */
  border-bottom: none;
}

/* Forms & Inputs */
.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

input, select {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--text-primary);
  font-size: 15px; /* Larger text for better readability */
  transition: all 0.2s ease-in-out;
  -webkit-appearance: none;
}

input[type="radio"], input[type="checkbox"] {
  width: auto;
  display: inline-block;
  margin-right: 4px;
  vertical-align: middle;
  -webkit-appearance: auto; /* Allow native radio/checkbox look */
}

input:focus, select:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.15); /* Soft focus ring */
}

/* Buttons */
button {
  cursor: pointer;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  border: none;
  background: var(--input-bg);
  color: var(--text-primary);
  font-weight: 500;
  font-size: 14px;
  transition: all 0.2s;
  box-shadow: 0 0 0 1px var(--border-color) inset; /* Inner border */
}

button:hover {
  background: var(--bg-color);
}

button.primary {
  background: var(--accent-color);
  color: white;
  box-shadow: none;
}

button.primary:hover {
  background: var(--accent-hover);
  opacity: 1;
}

button.danger {
  background: transparent;
  color: var(--danger-color);
  box-shadow: 0 0 0 1px var(--border-color) inset;
}

button.danger:hover {
  background: rgba(255, 59, 48, 0.1);
  box-shadow: 0 0 0 1px var(--danger-color) inset;
}

.btn-group {
  display: flex;
  gap: 12px;
}

/* Tables */
.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 14px;
}

th {
  text-align: left;
  color: var(--text-secondary);
  font-weight: 500;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}

tr:last-child td {
  border-bottom: none;
}

/* Details/Summary */
details {
  background: var(--input-bg);
  border-radius: var(--radius-sm);
  padding: 0;
  margin-bottom: 16px;
  border: 1px solid var(--border-color);
  overflow: hidden;
}

summary {
  cursor: pointer;
  font-weight: 500;
  font-size: 15px;
  color: var(--text-primary);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--card-bg);
  transition: background 0.2s;
}

summary:hover {
  background: var(--bg-color);
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: '+';
  color: var(--text-secondary);
  font-weight: 400;
  font-size: 18px;
}

details[open] summary::after {
  content: '−'; /* True minus sign */
}

details[open] summary {
  border-bottom: 1px solid var(--border-color);
}

details > div {
  padding: 16px;
}

/* Utility */
.text-right { text-align: right; }
.text-center { text-align: center; }
.mt-4 { margin-top: 24px; }
.full-width { width: 100%; }

/* Theme Toggle Switch */
.theme-toggle {
    background: none;
    border: none;
    box-shadow: none;
    padding: 8px;
    font-size: 18px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}
.theme-toggle:hover {
    background: none;
    color: var(--text-primary);
}

/* Modal Styles Update */
.modal-content {
    background: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

/* Logo Styles */
.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-pt {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    border-radius: 10px; /* Squircle-ish */
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-weight: 700;
    font-size: 16px;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Rounded", sans-serif;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    flex-shrink: 0;
}

.site-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

/* Mobile Optimizations */
@media (max-width: 600px) {
  .container {
      padding: 16px;
      /* padding-top: 70px; Removed */
  }
  
  header {
    /* height: auto; Removed */
    /* min-height: 60px; Removed */
    flex-wrap: wrap;
    padding: 0 0 16px 0; /* Reset padding for non-fixed header */
    gap: 16px;
  }
  
  .header-left {
      /* flex: 1; Removed */
      /* justify-content: space-between; Removed */
      width: 100%;
      justify-content: space-between; /* Keep logo and theme toggle apart */
  }

  .header-user-info {
    width: 100%;
    justify-content: space-between;
    background: var(--card-bg); /* Use card bg for better contrast */
    border: 1px solid var(--border-color); /* Add border */
    padding: 10px;
    border-radius: var(--radius-sm);
    margin-top: 0; /* Removed margin */
  }
  
  #currentUserDisp {
      margin-right: 0;
      flex: 1;
      font-size: 13px;
      border: none;
      background: transparent;
      padding: 0;
  }

  .btn-group {
    flex-direction: column;
  }
  
  button {
    width: 100%;
    margin-bottom: 8px;
  }
  
  .form-group div[style*="display:flex"] {
      flex-direction: column;
  }
  
  .form-group div[style*="display:flex"] button {
      width: 100%;
      margin-top: 8px;
  }
}