/* CSS Variables for Dynamic Theme Switching */
:root {
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --accent: #2563eb;
  --border: #e2e8f0;
  --input-bg: #f1f5f9;
  --result-bg: #f8fafc;
}

/* Dark Mode Override */
[data-theme="dark"] {
  --bg-color: #0f172a;
  --card-bg: #1e293b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent: #38bdf8;
  --border: #334155;
  --input-bg: #0f172a;
  --result-bg: #0b1329;
}

/* System Theme Auto Detection */
@media (prefers-color-scheme: dark) {
  [data-theme="auto"] {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #38bdf8;
    --border: #334155;
    --input-bg: #0f172a;
    --result-bg: #0b1329;
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  padding: 2rem 1rem;
  display: flex;
  justify-content: center;
  min-height: 100vh;
}

.container {
  max-width: 960px;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.brand h1 {
  font-size: 2rem;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.brand p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Theme Switcher Controls */
.theme-toggle {
  display: flex;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 3px;
  gap: 2px;
}

.theme-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.4rem 0.7rem;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 7px;
  cursor: pointer;
}

.theme-btn.active {
  background: var(--accent);
  color: #ffffff;
}

/* Bento Grid */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.bento-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
}

.bento-card.full-width {
  grid-column: 1 / -1;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-header h2 {
  font-size: 1.25rem;
}

.badge {
  background: var(--accent);
  color: #fff;
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: bold;
}

.card-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

textarea {
  width: 100%;
  background: var(--input-bg);
  border: 1px solid var(--border);
  color: var(--text-main);
  padding: 0.8rem;
  border-radius: 8px;
  resize: vertical;
  font-size: 0.95rem;
  outline: none;
}

textarea:focus {
  border-color: var(--accent);
}

button {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 0.75rem 1.2rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  align-self: flex-start;
}

button:hover {
  opacity: 0.9;
}

.result-box {
  background: var(--result-bg);
  border: 1px dashed var(--border);
  padding: 1rem;
  border-radius: 8px;
  min-height: 80px;
  white-space: pre-wrap;
  font-size: 0.9rem;
  color: var(--text-main);
  line-height: 1.5;
}