:root {
  color-scheme: dark;
  --bg-1: #0f1726;
  --bg-2: #1d2d49;
  --card: rgba(255, 255, 255, 0.08);
  --card-border: rgba(255, 255, 255, 0.14);
  --text: #f4f7fb;
  --muted: rgba(244, 247, 251, 0.72);
  --accent-1: #6bcbff;
  --accent-2: #9b7cff;
  --accent-3: #ffb17a;
  --success: #64d9a2;
  --shadow: 0 22px 50px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top right, rgba(155, 124, 255, 0.22), transparent 30%),
    radial-gradient(circle at bottom left, rgba(107, 203, 255, 0.16), transparent 28%),
    linear-gradient(180deg, var(--bg-2), var(--bg-1));
  color: var(--text);
}

.app-shell {
  width: min(100%, 760px);
  margin: 0 auto;
  padding: 18px 16px 28px;
}

.hero-card,
.panel {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 24px;
  margin-bottom: 16px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-1);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
}

h1 {
  font-size: 32px;
  line-height: 1.05;
}

.subtitle {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.button-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 24px;
}

.group-form {
  margin-top: 20px;
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.group-form label {
  display: block;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

.group-form-row {
  display: flex;
  gap: 10px;
  align-items: center;
}

.group-form-row input {
  flex: 1;
  min-height: 52px;
  padding: 0 16px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.22);
  color: var(--text);
  font-size: 15px;
}

.group-form-row input::placeholder {
  color: rgba(244, 247, 251, 0.42);
}

.group-form-hint {
  margin: 10px 0 0;
  color: rgba(244, 247, 251, 0.58);
  font-size: 13px;
  line-height: 1.45;
}

.compact-btn {
  min-width: 126px;
}

button {
  border: 0;
  border-radius: 18px;
  min-height: 52px;
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  cursor: pointer;
  transition: transform 0.18s ease, opacity 0.18s ease;
}

button:active {
  transform: scale(0.985);
}

.primary-btn {
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2), var(--accent-3));
}

.secondary-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.panel {
  padding: 18px;
  margin-bottom: 14px;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 30px;
  padding: 6px 12px;
  border-radius: 999px;
  color: #07111f;
  background: var(--success);
  font-size: 13px;
  font-weight: 700;
}

.log-box {
  margin: 0;
  padding: 14px;
  border-radius: 18px;
  background: rgba(0, 0, 0, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #d8e2ef;
  font-size: 13px;
  line-height: 1.45;
  white-space: pre-wrap;
  word-break: break-word;
}

.todo-list {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.55;
}

@media (max-width: 560px) {
  .app-shell {
    padding: 14px 12px 24px;
  }

  .hero-card,
  .panel {
    border-radius: 22px;
  }

  .hero-card {
    padding: 20px;
  }

  h1 {
    font-size: 28px;
  }

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

  .group-form-row {
    flex-direction: column;
    align-items: stretch;
  }

  .compact-btn {
    min-width: 0;
  }
}