* {
  box-sizing: border-box;
}

:root {
  --bg: #f7f7f9;
  --surface: #ffffff;
  --border: #e3e3e8;
  --text: #1f1f1f;
  --muted: #666666;
  --primary: #1f4ed8;
  --primary-dark: #173aa1;
  --secondary: #e8ecf8;
  --success-bg: #eef7ee;
  --success-text: #20663a;
  --shadow: 0 10px 25px rgba(0, 0, 0, 0.04);
  --radius: 16px;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  gap: 1rem;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand {
  font-weight: 700;
  font-size: 1.15rem;
}

.nav-link {
  font-size: 0.95rem;
}

.hero {
  padding: 4rem 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 2rem;
  align-items: center;
}

.lead {
  font-size: 1.1rem;
  max-width: 640px;
}

.hero-actions {
  margin: 1.5rem 0;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 0.8rem 1.2rem;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.2s ease;
}

.btn:hover {
  background: var(--primary-dark);
}

.btn-secondary {
  background: var(--secondary);
  color: var(--text);
}

.btn-secondary:hover {
  background: #dbe3fb;
}

.btn-small {
  padding: 0.55rem 0.9rem;
  font-size: 0.92rem;
}

.full-width {
  width: 100%;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.features,
.page-section {
  padding: 2rem 0 3rem;
}

.three-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.page-intro {
  margin-bottom: 1.5rem;
}

.page-intro h1 {
  margin-bottom: 0.35rem;
}

.muted-text {
  color: var(--muted);
}

.dashboard-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr;
  gap: 1.25rem;
  align-items: start;
}

.dashboard-main-card {
  min-height: 100%;
}

.dashboard-side-column {
  display: grid;
  gap: 1.25rem;
}

.essay-form {
  display: grid;
  gap: 0.9rem;
}

label {
  display: block;
  font-weight: 600;
  margin-top: 0.2rem;
}

input,
textarea,
select {
  width: 100%;
  padding: 0.85rem;
  border: 1px solid #cfcfd6;
  border-radius: 10px;
  font-size: 1rem;
  font-family: inherit;
  background: #fff;
  color: var(--text);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

.message {
  margin-top: 1rem;
  font-size: 0.95rem;
  color: var(--muted);
}

.message.success {
  color: var(--success-text);
  background: var(--success-bg);
  padding: 0.85rem 1rem;
  border-radius: 10px;
}

.auth-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem;
}

.auth-card {
  width: min(460px, 100%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.auth-footer,
.fine-print {
  color: var(--muted);
  font-size: 0.92rem;
  margin-top: 1rem;
}

.result-placeholder p {
  margin-top: 0;
}

.result-block {
  display: grid;
  gap: 0.75rem;
}

.score-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin: 0.5rem 0 0.25rem;
}

.score-item {
  background: #f3f5fb;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.85rem;
}

.score-item strong {
  display: block;
  margin-bottom: 0.2rem;
}

.result-section {
  margin-top: 0.75rem;
}

.result-section h3 {
  margin-bottom: 0.4rem;
  font-size: 1rem;
}

.result-section ul {
  padding-left: 1.2rem;
  margin: 0.4rem 0 0;
}

.info-list {
  padding-left: 1.2rem;
  margin: 0.5rem 0 0;
}

.info-list li + li {
  margin-top: 0.5rem;
}

.recent-section {
  margin-top: 1.25rem;
}

.recent-item {
  padding: 1rem 0;
  border-top: 1px solid var(--border);
}

.recent-item:first-child {
  border-top: none;
  padding-top: 0;
}

.recent-item:last-child {
  padding-bottom: 0;
}

.stack {
  display: grid;
  gap: 1rem;
}

@media (max-width: 900px) {
  .hero-grid,
  .dashboard-grid,
  .three-col {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 640px) {
  .nav {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-actions {
    width: 100%;
    justify-content: space-between;
  }

  .hero-actions {
    flex-direction: column;
  }
}