/* styles.css — Mobile-first big touch-friendly UI */

/* ---------- Base theme ---------- */
:root {
  --bg: #f0f8ff;         /* light blue background */
  --ink: #103a5a;
  --ink-muted: #2f5877;
  --primary: #0066cc;
  --primary-dark: #005bb5;
  --card: #ffffff;
  --line: #b3d1ff;
  --shadow: 0 8px 18px rgba(0, 0, 128, 0.12);

  /* Typography (mobile first) */
  --fs-base: 18px;       /* body text on phones */
  --fs-h2: 26px;         /* section title */
  --fs-label: 16px;      /* form labels */
  --fs-input: 18px;      /* input text */
  --fs-btn: 18px;        /* button text */
  --fs-table: 18px;      /* table cells */

  /* Controls sizing */
  --control-h: 56px;     /* min height for inputs/buttons on phones */
  --radius: 12px;
}

/* Desktop/tablet override */
@media (min-width: 992px) {
  :root {
    --fs-base: 17px;
    --fs-h2: 24px;
    --fs-label: 15px;
    --fs-input: 17px;
    --fs-btn: 17px;
    --fs-table: 17px;
    --control-h: 48px;   /* slightly tighter on desktop */
  }
}

/* Very small phones boost */
@media (max-width: 380px) {
  :root {
    --fs-base: 19px;
    --fs-input: 19px;
    --fs-btn: 19px;
    --control-h: 60px;
  }
}

/* ---------- Reset / base ---------- */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: var(--fs-base);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.content { padding: 20px; }

/* ---------- Top nav ---------- */
.nav {
  background-color: var(--primary);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.nav a {
  float: left;
  display: block;
  color: #fff;
  text-align: center;
  padding: 16px 22px;
  text-decoration: none;
  font-weight: 600;
  font-size: clamp(16px, 1.2vw + 12px, 18px);
}
.nav a:hover { background-color: var(--primary-dark); }

/* Stack nav on mobile */
@media (max-width: 768px) {
  .nav a {
    float: none;
    width: 100%;
    text-align: left;
    padding: 16px 18px;
  }
}

/* ---------- Headings ---------- */
h2 {
  text-align: center;
  color: #003366;
  font-size: var(--fs-h2);
  margin: 0 0 12px;
}

/* ---------- Form block ---------- */
.form-container {
  background-color: #e9f3ff;
  padding: 18px;
  margin: 20px auto;
  width: min(980px, 95%);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid #d6e7ff;
}

.form-container label {
  display: block;
  margin: 10px 0 6px;
  color: var(--ink-muted);
  font-weight: 700;
  font-size: var(--fs-label);
}

/* Inputs & selects — *big and tappable* */
.form-container input[type="text"],
.form-container input[type="number"],
.form-container input[type="date"],
.form-container input[type="email"],
.form-container input[type="password"],
.form-container select,
.form-container textarea {
  width: 100%;
  padding: 12px 14px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  box-sizing: border-box;
  font-size: var(--fs-input);
  min-height: var(--control-h);
  background: #fff;
  transition: border-color .15s, box-shadow .15s, transform .02s;
}
.form-container textarea {
  min-height: calc(var(--control-h) * 1.6);
  resize: vertical;
}

.form-container input:focus,
.form-container select:focus,
.form-container textarea:focus {
  outline: none;
  border-color: #7db9ff;
  box-shadow: 0 0 0 4px rgba(0, 102, 204, 0.15);
}

/* Submit buttons — large & full-width on phones */
.form-container input[type="submit"],
.button-group input[type="submit"],
button.btn-primary {
  margin-top: 16px;
  padding: 12px 18px;
  background-color: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: var(--fs-btn);
  font-weight: 700;
  min-height: var(--control-h);
  width: 100%;
  transition: background-color .15s, box-shadow .15s, transform .02s;
}
.form-container input[type="submit"]:hover,
.button-group input[type="submit"]:hover,
button.btn-primary:hover {
  background-color: var(--primary-dark);
  box-shadow: 0 6px 16px rgba(0, 0, 128, 0.18);
}
.form-container input[type="submit"]:active,
.button-group input[type="submit"]:active,
button.btn-primary:active {
  transform: translateY(1px);
}

/* Two-column form rows on wider screens */
@media (min-width: 900px) {
  .form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px 16px;
  }
}

/* ---------- Tables (responsive & readable) ---------- */
.table-container {
  width: min(1200px, 95%);
  margin: 20px auto;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid #d6e7ff;
  overflow-x: auto;               /* horizontal scroll on small screens */
  -webkit-overflow-scrolling: touch;
}

.table-container table {
  width: 100%;
  border-collapse: collapse;
  background-color: #fff;
  min-width: 680px;               /* keep columns readable */
  font-size: var(--fs-table);
}

.table-container th,
.table-container td {
  border: 1px solid #7aa8da;      /* clearer grid lines */
  padding: 14px 12px;
  text-align: left;
}

.table-container th {
  background-color: var(--primary);
  color: #fff;
  font-weight: 800;
  position: sticky;
  top: 0;
  z-index: 1;
}

.table-container tr:nth-child(even) { background-color: #f4f9ff; }
.table-container tr:hover { background-color: #e4f2ff; }

/* ---------- Button group ---------- */
.button-group {
  text-align: center;
  margin: 20px;
}
.button-group input[type="submit"] {
  max-width: 480px;
  margin-inline: auto;
}

/* ---------- Mobile tweaks ---------- */
@media (max-width: 768px) {
  .content { padding: 16px; }

  .form-container {
    width: 96%;
    padding: 16px;
    border-radius: 14px;
  }

  /* Make controls full width (already 100%) and roomy */
  .form-container input[type="text"],
  .form-container input[type="number"],
  .form-container input[type="date"],
  .form-container input[type="email"],
  .form-container input[type="password"],
  .form-container select,
  .form-container textarea {
    padding: 14px 16px;
  }
}

/* ---------- Accessibility helpers ---------- */
:focus-visible {
  outline: 3px solid #7db9ff;
  outline-offset: 2px;
}