:root {
  --color-bg: #f7f5f2;
  --color-surface: #ffffff;
  --color-text: #22252a;
  --color-muted: #6b7280;
  --color-border: #e4e1db;
  --color-primary: #1f4b5f;
  --color-primary-dark: #163a4a;
  --color-success: #1c7c4d;
  --color-success-bg: #e8f6ee;
  --color-error: #b3261e;
  --color-error-bg: #fbeae9;
  --radius: 12px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

.wrap {
  max-width: 560px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

.header {
  margin-bottom: 32px;
}

.eyebrow {
  text-align: center;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  margin: 0 0 12px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.hero-banner {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.form {
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  padding: 24px;
}

.field {
  margin-bottom: 20px;
}

.field label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 0.95rem;
}

.required {
  color: var(--color-error);
}

textarea,
input[type="text"] {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  resize: vertical;
  background: var(--color-bg);
  color: var(--color-text);
}

textarea:focus,
input[type="text"]:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

.counter {
  text-align: right;
  color: var(--color-muted);
  font-size: 0.8rem;
  margin-top: 4px;
}

.honeypot {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

button {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 8px;
  background: var(--color-primary);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

button:hover:not(:disabled) {
  background: var(--color-primary-dark);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.result {
  margin-top: 20px;
  padding: 14px 16px;
  border-radius: 8px;
  text-align: center;
  font-weight: 600;
}

.result.success {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.result.error {
  background: var(--color-error-bg);
  color: var(--color-error);
}

.wall {
  margin-top: 40px;
}

.wall-header {
  margin-bottom: 12px;
}

.wall-header h2 {
  font-size: 1.1rem;
  margin: 0;
}

.search {
  display: block;
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  background: var(--color-surface);
  color: var(--color-text);
  margin-bottom: 16px;
}

.search:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

.sort-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.sort-tab {
  width: auto;
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-muted);
  font-size: 0.85rem;
  font-weight: 600;
}

.sort-tab:hover:not(:disabled) {
  background: var(--color-bg);
}

.sort-tab.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.wall-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.wall-item {
  display: flex;
  gap: 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px;
}

.avatar {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
}

.wall-item-body {
  flex: 1;
  min-width: 0;
}

.wall-item-top {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.wall-item-name {
  font-weight: 700;
  font-size: 0.9rem;
}

.status-badge {
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--color-success-bg);
  color: var(--color-success);
  font-size: 0.72rem;
  font-weight: 700;
}

.wall-item-time {
  color: var(--color-muted);
  font-size: 0.78rem;
}

.wall-item-content {
  white-space: pre-wrap;
  word-break: break-word;
  margin-bottom: 10px;
}

.like-btn {
  width: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-bg);
  color: var(--color-muted);
  font-size: 0.85rem;
  font-weight: 600;
}

.like-btn:hover:not(:disabled) {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.like-btn.liked {
  color: #c23b5a;
  border-color: #f3c6d1;
  background: #fdf0f3;
}

.like-btn:disabled {
  cursor: default;
}

.like-icon {
  font-size: 0.95rem;
}

.loading,
.empty {
  text-align: center;
  color: var(--color-muted);
  padding: 24px 0;
}

@media (min-width: 480px) {
  .wrap {
    padding-top: 56px;
  }
}