:root {
  --bg: #f4f7fb;
  --card: #ffffff;
  --text: #1f2937;
  --subtle: #6b7280;
  --accent: #0b7285;
  --accent-hover: #0a5f6f;
  --accent-light: #e0f7fa;
  --border: #dbe2ea;
  --success: #166534;
  --error: #b91c1c;
  --highlight: #fef08a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 90% 10%, #d2f4fa 0%, transparent 40%),
    radial-gradient(circle at 10% 90%, #dbeafe 0%, transparent 40%),
    var(--bg);
  padding: 1rem;
}

/* ========== Card ========== */
.container {
  width: min(100%, 480px);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2rem;
  box-shadow: 0 12px 40px rgba(15, 23, 42, 0.08);
}

h1 {
  margin: 0 0 1.5rem;
  font-size: 1.6rem;
  text-align: center;
}

form {
  display: grid;
  gap: 1rem;
}

label {
  font-weight: 600;
  font-size: 0.95rem;
}

/* ========== Input ========== */
.input-wrapper {
  position: relative;
}

input[type="text"] {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  font-size: 1rem;
  font-family: inherit;
  background: var(--card);
  transition: border-color 0.15s ease;
}

input[type="text"]:focus {
  border-color: var(--accent);
  outline: 2px solid color-mix(in srgb, var(--accent), white 70%);
}

/* ========== Dropdown ========== */
.autocomplete-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  max-height: 260px;
  overflow-y: auto;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(15, 23, 42, 0.12);
  z-index: 100;
  display: none;
}

.autocomplete-dropdown.visible {
  display: block;
  animation: dropIn 0.15s ease;
}

@keyframes dropIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.ac-item {
  padding: 0.65rem 1rem;
  cursor: pointer;
  font-size: 0.95rem;
  transition: background 0.1s ease;
}

.ac-item:first-child { border-radius: 12px 12px 0 0; }
.ac-item:last-child  { border-radius: 0 0 12px 12px; }
.ac-item:only-child  { border-radius: 12px; }

.ac-item:hover,
.ac-item.highlighted {
  background: var(--accent-light);
}

.ac-item mark {
  background: var(--highlight);
  color: inherit;
  padding: 0 1px;
  border-radius: 2px;
}

/* ========== Checkbox ========== */
.checkbox-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
  font-size: 0.95rem;
  cursor: pointer;
}

input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
}

/* ========== Submit Button ========== */
button[type="submit"] {
  border: 0;
  border-radius: 10px;
  padding: 0.8rem 1rem;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.2s ease;
}

button[type="submit"]:hover { background: var(--accent-hover); }
button[type="submit"]:active { opacity: 0.9; }

/* ========== Status ========== */
#status {
  margin-top: 1rem;
  min-height: 1.2rem;
  font-size: 0.9rem;
  color: var(--subtle);
  text-align: center;
}

#status.success { color: var(--success); }
#status.error   { color: var(--error); }

/* ========== Mobile ========== */
@media (max-width: 480px) {
  body { padding: 0.75rem; }

  .container { padding: 1.5rem; border-radius: 16px; }

  h1 { font-size: 1.4rem; }

  input[type="text"] {
    padding: 0.85rem 1rem;
    /* Prevent iOS zoom */
    font-size: max(16px, 1rem);
  }

  button[type="submit"] {
    padding: 0.9rem 1rem;
    font-size: 1.05rem;
  }

  .ac-item {
    padding: 0.85rem 1rem;
    /* Comfortable touch target */
    min-height: 48px;
    display: flex;
    align-items: center;
  }

  input[type="checkbox"] { width: 20px; height: 20px; }
}