:root {
  --color-bg: #f7f5f2;
  --color-text: rgba(0, 0, 0, .85);
  --color-text-secondary: rgba(0, 0, 0, .75);
  --color-paper: #ffffff;
  --color-border: rgba(139, 69, 19, .15);
  --color-ink: rgba(0, 0, 0, .85);
  --color-divider: rgba(139, 69, 19, .1);
  --color-hover: rgba(139, 69, 19, .05);
  --color-accent: #8b4513;
  --font-english: "EB Garamond", serif;
  --font-ui: "EB Garamond", "Inter", sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  border-width: 0;
  border-style: solid;
  border-color: var(--color-border);
}

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-english);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  min-height: 100vh;
  font-feature-settings: "liga" 1, "kern" 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

#root {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-container {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.top-bar {
  background-color: var(--color-paper);
  border-bottom: 1px solid var(--color-border);
  padding: 0rem 3rem;
  display: flex;
  justify-content: start;
  align-items: center;
  position: relative;
  z-index: 1;
  background: linear-gradient(to bottom, #ffffff, #f8f6f0);
  font-size: 1rem;
}

.main-content {
  display: flex;
  flex: 1;
  gap: 2rem;
  padding: 2rem;
  min-height: calc(100vh - 74px);
  max-width: 2000px;
  margin: 0 auto;
  width: 100%;
}

.pane {
  flex: 1;
  background: var(--color-paper);
  border-radius: 8px;
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
  background: linear-gradient(to bottom, #ffffff, #f8f6f0);
}

.pane::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    linear-gradient(to right, var(--color-border) 1px, transparent 1px) 0 0 / 30px 100%,
    linear-gradient(to bottom, var(--color-border) 1px, transparent 1px) 0 0 / 100% 30px;
  opacity: 0.05;
  pointer-events: none;
}

.pane::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.8), transparent);
  opacity: 0.4;
  pointer-events: none;
}

.pane-header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  gap: 1rem;
  align-items: center;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  position: relative;
  z-index: 1;
}

.pane-content {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
  position: relative;
  line-height: 1.8;
  z-index: 1;
  display: flex;
  flex-direction: column;
}

textarea {
  height: 100%;
  width: 100%;
  border: none;
  background: transparent;
  color: var(--color-ink);
  font-family: var(--font-english);
  font-size: 1.25rem;
  line-height: 1.8;
  resize: none;
  padding: 0;
  overflow-y: auto;
}

textarea:focus {
  outline: none;
}

textarea::placeholder {
  color: rgba(44, 62, 80, 0.4);
  font-style: italic;
}

select {
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-ui);
  font-size: 0.9rem;
  min-width: 200px;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%238b4513%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem top 50%;
  background-size: 0.65rem auto;
  transition: all 0.2s ease;
}

select:hover {
  border-color: var(--color-accent);
  background-color: #fdfcfa;
}

button {
  padding: 0.75rem 1.5rem;
  background-color: rgba(139, 69, 19, 0.1);
  color: var(--color-accent);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  cursor: pointer;
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s;
  box-shadow: 0 1px 2px rgba(139, 69, 19, 0.1);
}

button:hover {
  transform: translateY(-1px);
  background-color: rgba(139, 69, 19, 0.15);
  border-color: var(--color-accent);
  box-shadow: 0 2px 4px rgba(139, 69, 19, 0.15);
}

button:disabled {
  background-color: rgba(139, 69, 19, 0.05);
  color: rgba(139, 69, 19, 0.4);
  border-color: var(--color-border);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.output-text {
  font-family: var(--font-english);
  font-size: 1.25rem;
  line-height: 1.8;
  white-space: pre-wrap;
  color: var(--color-ink);
  position: relative;
}

.output-text:empty::before {
  content: 'A sample essay will appear here...';
  color: rgba(44, 62, 80, 0.4);
  font-style: italic;
  position: absolute;
  top: 0;
  left: 0;
  width: 300px;
}

h1 {
  font-family: var(--font-english);
  font-weight: 500;
  color: var(--color-ink);
  font-size: 1.5rem;
  margin: 0;
  letter-spacing: 0.02em;
}

h2 {
  font-family: var(--font-english);
  font-weight: 500;
  color: var(--color-ink);
  font-size: 1.25rem;
  margin: 0;
  letter-spacing: 0.02em;
}

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(139, 69, 19, 0.05);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 8px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent);
}

@media (max-width: 768px) {
  .main-content {
    flex-direction: column;
    padding: 1rem;
    gap: 1rem;
  }

  .top-bar {
    padding: 1rem;
  }

  .pane-header {
    padding: 1rem;
    flex-wrap: wrap;
  }

  .pane-header h2 {
    width: 100%;
    margin-bottom: 0.5rem;
  }

  .pane-content {
    padding: 1rem;
  }

  h1 {
    font-size: 1.5rem;
  }

  select {
    flex: 1;
    min-width: 0;
  }
}