:root {
  --bg: #070b12;
  --panel: #101821;
  --line: #1e2a38;
  --text: #f3f6fa;
  --muted: #8b97a8;
  --accent: #18ef9d;
  --danger: #ff4d4f;
  --input: #0b121b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(24, 239, 157, 0.12), transparent 40%),
    linear-gradient(180deg, #0a1018 0%, var(--bg) 55%);
}

.page {
  max-width: 1120px;
  margin: 0 auto;
  padding: 40px 20px 64px;
}

.header h1 {
  margin: 0;
  font-size: 2rem;
  letter-spacing: 0.02em;
}

.header p {
  margin: 8px 0 0;
  color: var(--muted);
}

.layout {
  display: grid;
  grid-template-columns: minmax(280px, 420px) minmax(280px, 1fr);
  gap: 24px;
  margin-top: 28px;
}

.form,
.preview-frame {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
}

.form {
  display: grid;
  gap: 14px;
  padding: 20px;
}

label {
  display: grid;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--muted);
}

input,
select,
button,
.ghost {
  font: inherit;
}

input,
select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--input);
  color: var(--text);
}

input:focus,
select:focus {
  outline: 1px solid var(--accent);
  border-color: var(--accent);
}

.row,
.datetime-row,
.actions {
  display: grid;
  gap: 12px;
}

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

.datetime-row {
  grid-template-columns: 1fr auto;
}

.actions {
  grid-template-columns: 1fr auto;
  margin-top: 6px;
}

button,
.ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 16px;
  border-radius: 10px;
  border: 0;
  cursor: pointer;
  text-decoration: none;
}

button[type="submit"] {
  background: var(--accent);
  color: #04120c;
  font-weight: 700;
}

.ghost {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text);
}

.ghost.hidden {
  display: none;
}

.status {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

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

.preview-frame {
  min-height: 520px;
  padding: 16px;
  display: grid;
  place-items: center;
}

#preview-image {
  width: 100%;
  max-width: 560px;
  border-radius: 12px;
  display: block;
}

#preview-placeholder {
  color: var(--muted);
}

.header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.logout-form {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
}

.user-chip {
  color: var(--muted);
  font-size: 0.9rem;
}

.login-page {
  max-width: 480px;
}

.login-form {
  margin-top: 28px;
}

.login-form button[type="submit"] {
  background: var(--accent);
  color: #04120c;
  font-weight: 700;
  border: 0;
  border-radius: 10px;
  padding: 12px 16px;
  cursor: pointer;
}

.login-form button[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
}

@media (max-width: 860px) {
  .layout,
  .row,
  .actions {
    grid-template-columns: 1fr;
  }

  .header-row {
    flex-direction: column;
  }
}