/* Shared CSS Variables */
:root {
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --success: #16a34a;
  --danger: #dc2626;
  --text: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --table-header-bg: #f1f5f9;
  --table-zebra-bg: #f8fafc;
  --nav-link: #2563eb;
}

[data-theme="dark"] {
  --bg: #0f172a;
  --card-bg: #1e293b;
  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --success: #22c55e;
  --danger: #ef4444;
  --text: #f8fafc;
  --text-muted: #94a3b8;
  --border: #334155;
  --table-header-bg: #334155;
  --table-zebra-bg: #1e293b;
  --nav-link: #60a5fa;
}

html {
  height: 100%;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
}

/* Ensure main content expands to fill available space */
.container, main {
  flex: 1;
}

footer {
  margin-top: auto;
  text-align: center;
  padding: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
}

/* Base Body & Layout */
body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  max-width: 950px;
  margin: 1.5rem auto 4rem auto;
  padding: 0 1.5rem;
}

.container {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
  border: 1px solid var(--border);
}

/* Typography */
h1 { font-size: 1.8rem; margin-top: 0; margin-bottom: 0.5rem; color: var(--text); }
.subtitle { color: var(--text-muted); margin-bottom: 1.75rem; font-size: 0.95rem; }
.summary-text { font-weight: 600; color: var(--text-muted); margin-bottom: 1rem; }

/* Navigation */
.nav-bar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.nav-links { display: flex; gap: 1rem; align-items: center; }
.nav-brand { color: var(--nav-link); text-decoration: none; font-weight: 600; }
.nav-item { color: var(--nav-link); text-decoration: none; }
.nav-divider { color: var(--border); }

/* Theme Toggle Button */
.theme-toggle-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.theme-toggle-btn:hover { background-color: var(--border); }

/* Section Headers */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 2rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border);
}
.section-header h2 { font-size: 1.25rem; margin: 0; color: var(--text); }

/* Buttons & Inputs */
.input-mode-toggle {
  background: var(--border);
  border: none;
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--text);
  font-weight: 600;
}

.input-field {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--border);
  background-color: var(--bg);
  color: var(--text);
  border-radius: 6px;
  box-sizing: border-box;
  font-size: 0.95rem;
}

.mark-input-group { display: flex; align-items: center; gap: 0.4rem; }

.btn-add {
  background-color: var(--border);
  color: var(--text);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
}

.btn-remove {
  background: none;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: 1.2rem;
}

.btn-calculate {
  background-color: var(--primary);
  color: white;
  border: none;
  width: 100%;
  padding: 0.85rem;
  border-radius: 6px;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  margin-top: 2rem;
}
.btn-calculate:hover { background-color: var(--primary-hover); }

/* Tables */
.assessment-table, .boundary-table { width: 100%; border-collapse: collapse; margin-bottom: 1rem; }
.assessment-table th, .assessment-table td { padding: 0.6rem; text-align: left; }
.assessment-table th { font-size: 0.85rem; color: var(--text-muted); text-transform: uppercase; }

.boundary-table th, .boundary-table td { padding: 0.75rem 1rem; border: 1px solid var(--border); text-align: center; color: var(--text); }
.boundary-table th { background-color: var(--table-header-bg); font-weight: 600; }
.boundary-table tr:nth-child(even) { background-color: var(--table-zebra-bg); }

.results-section { margin-top: 2.5rem; display: none; }
.badge-pass { color: var(--success); font-weight: bold; }
.badge-fail { color: var(--danger); font-weight: bold; }

@media print {
  /* Hide unnecessary interactive elements */
  .nav-bar,
  .subtitle,
  .section-header,
  .assessment-table,
  .btn-add,
  .btn-calculate,
  .input-mode-toggle,
  .no-print,
  .container > div:not(.results-section) {
    display: none !important;
  }

  body {
    background: #ffffff !important;
    color: #000000 !important;
    margin: 0 !important;
    padding: 0 !important;
  }

  .container {
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
    background: transparent !important;
  }

  .results-section {
    display: block !important;
    margin-top: 0 !important;
  }

  .boundary-table {
    width: 100% !important;
    page-break-inside: avoid;
    margin-bottom: 1.5rem !important;
  }

  .boundary-table th, 
  .boundary-table td {
    color: #000000 !important;
    border: 1px solid #cccccc !important;
  }
}