:root {
  --bg: #eceff1;
  --surface: #ffffff;
  --ink: #111111;
  --ink-soft: #2f2f2f;
  --border: #8b8b8b;
  --accent: #1f1f1f;
  --accent-hover: #000000;
  --danger: #2a2a2a;
  --danger-hover: #000000;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, "Segoe UI", sans-serif;
  font-size: 15px;
  color: var(--ink);
  background: var(--bg);
}

header,
main {
  width: min(980px, calc(100% - 1.5rem));
  margin: 0.7rem auto;
}

header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: var(--surface);
}

h1,
h2,
h3 {
  margin: 0;
}

h1 {
  font-size: 1.1rem;
  letter-spacing: 0.02em;
}

h2 {
  margin-bottom: 0.4rem;
  font-size: 1rem;
}

nav {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

a {
  color: var(--ink);
  text-decoration: underline;
}

nav a {
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: #f2f2f2;
  text-decoration: none;
}

nav a:hover {
  border-color: #555555;
  background: #e9e9e9;
}

main {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 0.75rem;
}

article {
  margin-top: 0.6rem;
  padding: 0.65rem;
  border-radius: 0;
  border: 1px solid var(--border);
  background: var(--surface);
}

#post-list {
  margin-top: 0.5rem;
}

.post-row {
  display: grid;
  grid-template-columns: minmax(140px, 210px) 1fr auto;
  gap: 0.6rem;
  align-items: start;
}

.post-title {
  font-size: 0.95rem;
  line-height: 1.25;
}

.post-content {
  margin: 0;
  color: var(--ink-soft);
  overflow-wrap: anywhere;
}

.post-actions {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.post-actions a {
  display: inline-block;
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: #f2f2f2;
  text-decoration: none;
  line-height: 1;
}

.post-actions a:hover {
  border-color: #555555;
  background: #e9e9e9;
}

p {
  margin: 0.45rem 0;
  line-height: 1.35;
  color: var(--ink-soft);
}

label {
  font-weight: 600;
  font-size: 0.92rem;
}

input,
textarea {
  width: 100%;
  margin-top: 0.25rem;
  margin-bottom: 0.55rem;
  padding: 0.4rem 0.5rem;
  border-radius: 0;
  border: 1px solid var(--border);
  font: inherit;
  color: var(--ink);
  background: var(--surface);
}

input:focus,
textarea:focus {
  outline: 2px solid rgba(0, 0, 0, 0.2);
  border-color: var(--accent);
}

button {
  border: 1px solid var(--accent-hover);
  border-radius: 2px;
  padding: 0.35rem 0.6rem;
  font: inherit;
  font-weight: 600;
  font-size: 0.88rem;
  letter-spacing: 0.03em;
  cursor: pointer;
  background: var(--accent);
  color: white;
}

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

.delete-post-button,
#delete-post-button {
  background: var(--danger);
  border-color: var(--danger-hover);
}

.delete-post-button:hover,
#delete-post-button:hover {
  background: var(--danger-hover);
}

#message {
  min-height: 1rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

@media (max-width: 640px) {
  header,
  main {
    width: calc(100% - 0.5rem);
    margin: 0.25rem auto;
  }

  main {
    padding: 0.55rem;
  }

  .post-row {
    grid-template-columns: 1fr;
    gap: 0.45rem;
  }

  .post-actions {
    flex-wrap: wrap;
  }
}