:root {
  --bg: #f8fbff;
  --panel: #ffffff;
  --text: #101828;
  --muted: #4a5565;
  --accent: #155dfc;
  --accent-dark: #1447e6;
  --line: #d1d5dc;
  --success: #008138;
  --error: #bf000f;
  --shadow: 0 18px 48px rgba(20, 40, 75, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: ui-sans-serif, system-ui, sans-serif;
  color: var(--text);
  background:
    linear-gradient(180deg, rgba(238, 247, 255, 0.92), rgba(248, 251, 255, 0.96)),
    url("./EDP.jpg") center / 180px auto repeat;
}

button,
input,
textarea {
  font: inherit;
}

.availability-shell {
  width: min(920px, calc(100% - 28px));
  margin: 0 auto;
  padding: 24px 0 42px;
}

.availability-header {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 68px;
  margin-bottom: 18px;
}

.availability-header img {
  width: 42px;
  height: 52px;
  object-fit: contain;
}

.availability-header p,
.availability-header h1 {
  margin: 0;
}

.availability-header p {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.availability-header h1 {
  margin-top: 3px;
  font-size: clamp(1.8rem, 5vw, 2.7rem);
  line-height: 1.08;
}

.availability-card {
  padding: 22px;
  border: 1px solid rgba(209, 213, 220, 0.86);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow);
}

.availability-form {
  display: grid;
  gap: 18px;
}

.field,
.weeks-fieldset {
  display: grid;
  gap: 8px;
  margin: 0;
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 800;
}

.weeks-fieldset {
  padding: 0;
  border: 0;
}

.weeks-fieldset legend {
  margin-bottom: 8px;
  font-weight: 800;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 10px 12px;
  background: #ffffff;
  color: var(--text);
}

textarea {
  resize: vertical;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

.weeks-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.week-option {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  min-height: 58px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  font-weight: 800;
}

.week-option input {
  width: 24px;
  height: 24px;
  margin: 0;
  accent-color: var(--accent);
}

.week-option span {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}

button {
  width: fit-content;
  border: 0;
  border-radius: 7px;
  padding: 10px 16px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 800;
  cursor: pointer;
}

button:hover {
  background: var(--accent-dark);
}

button:disabled {
  cursor: wait;
  opacity: 0.65;
}

.availability-status {
  min-height: 22px;
  margin: 16px 0 0;
  color: var(--muted);
  font-weight: 800;
}

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

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

@media (max-width: 720px) {
  .availability-shell {
    width: min(100% - 18px, 920px);
    padding-top: 14px;
  }

  .availability-card {
    padding: 14px;
  }

  .weeks-grid {
    grid-template-columns: 1fr;
  }

  button {
    width: 100%;
  }
}