/* LessonForge - ESL Lesson Generator */
/* Apple-inspired design with dark mode support */

:root {
  --bg: #ffffff;
  --fg: #1d1d1f;
  --card-bg: #f5f5f7;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --border: #d2d2d7;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
}

[data-theme='dark'] {
  --bg: #1d1d1f;
  --fg: #f5f5f7;
  --card-bg: #2d2d2f;
  --accent: #2997ff;
  --accent-hover: #409cff;
  --border: #424245;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--bg);
  color: var(--fg);
  line-height: 1.6;
}

.app-header {
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow);
}

.app-header h1 {
  margin: 0;
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--accent);
}

.app-header .subtitle {
  margin: 0;
  font-size: 0.9rem;
  opacity: 0.7;
}

.app-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.input-panel {
  background-color: var(--card-bg);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
}

.input-panel h2 {
  margin-top: 0;
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  font-size: 0.95rem;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background-color: var(--bg);
  color: var(--fg);
  font-size: 1rem;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
}

input[type="submit"] {
  width: 100%;
  padding: 0.875rem;
  background-color: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s;
}

input[type="submit"]:hover {
  background-color: var(--accent-hover);
}

.output-panel {
  display: none;
}

.toolbar {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.toolbar button {
  padding: 0.6rem 1rem;
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.toolbar button:hover {
  background-color: var(--border);
}

.slides-container {
  width: 100%;
  overflow: hidden;
}

.reveal {
  width: 100%;
}

.slides {
  width: 100%;
}

.whiteboard-container {
  display: none;
  width: 100%;
  height: 500px;
  margin-top: 2rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background-color: var(--bg);
}

#excalidrawWrapper {
  width: 100%;
  height: 100%;
}

/* Slide styles */
.slide {
  padding: 3rem;
  text-align: center;
}

.slide h1,
.slide h2,
.slide h3 {
  margin-top: 0;
}

.slide ul {
  text-align: left;
  max-width: 600px;
  margin: 0 auto;
}

.slide li {
  margin: 0.75rem 0;
}

/* Utility classes */
.hidden {
  display: none;
}