/* Bui Quy — Unique Centered Minimalist + Asymmetric Card Grid | Lavender-Graphite Palette | 2026 */
/* Fresh design: larger 16px radius, soft shadows, clean centered prose, organic card grid, no sidebars this time */

:root {
  --bg: #F9F7FC;
  --bg-soft: #F4F0FA;
  --text: #2A2A3A;
  --text-muted: #5F5A6A;
  --accent: #7B6B9E;
  --accent-dark: #5F526E;
  --border: #E5E0F0;
  --card: #FFFFFF;
  --radius: 16px;
  --shadow: 0 8px 25px rgba(42, 42, 58, 0.08);
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.85;
  font-size: 17px;
}

h1, h2, h3 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 600;
  line-height: 1.3;
  color: var(--text);
}

h1 { font-size: 3.1rem; }
h2 { font-size: 2.2rem; }
h3 { font-size: 1.5rem; }

a {
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition);
}
a:hover { color: var(--accent-dark); }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header - Clean classic with logo left, nav right */
header {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 1.35rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

.logo {
  font-family: Georgia, serif;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.025em;
}

.nav {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
}

.nav a:hover {
  color: var(--accent);
}

.mobile-menu {
  display: none;
  background: none;
  border: 1px solid var(--border);
  padding: 0.5rem 1rem;
  border-radius: 999px;
  font-size: 1rem;
  cursor: pointer;
}

/* Hero - Full width colored block with centered content */
.hero {
  background: linear-gradient(145deg, #7B6B9E 0%, #5F526E 100%);
  color: #F9F7FC;
  padding: 6rem 0 5.5rem;
  text-align: center;
}

.hero-content {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 2rem;
}

.hero h1 {
  color: #F9F7FC;
  font-size: 3.5rem;
  margin-bottom: 1.3rem;
  letter-spacing: -0.03em;
}

.hero p {
  font-size: 1.25rem;
  opacity: 0.92;
  max-width: 520px;
  margin: 0 auto 2.5rem;
}

.cta-button {
  display: inline-block;
  background: #F9F7FC;
  color: var(--accent-dark);
  padding: 0.9rem 2.4rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.cta-button:hover {
  background: #EDE6F5;
  transform: translateY(-2px);
}

/* Intro - Centered narrow column, lots of breathing room */
.intro {
  max-width: 720px;
  margin: 5rem auto;
  padding: 0 1rem;
}

.intro h2 {
  text-align: center;
  margin-bottom: 2.3rem;
}

.intro p {
  font-size: 1.08rem;
  color: var(--text-muted);
  margin-bottom: 1.7rem;
}

/* Articles - Asymmetric feeling grid (responsive masonry-like) */
.articles-section {
  padding-bottom: 5rem;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  max-width: 1100px;
  margin: 0 auto;
}

.article-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.2rem 2.3rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 15px 35px rgba(42, 42, 58, 0.1);
  border-color: var(--accent);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  margin-bottom: 1.1rem;
}

.article-date {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

.tag {
  font-size: 0.72rem;
  padding: 0.25rem 0.85rem;
  background: #EDE6F5;
  color: var(--accent-dark);
  border-radius: 999px;
  font-weight: 600;
}

.article-card h3 {
  font-size: 1.42rem;
  margin-bottom: 1.2rem;
  line-height: 1.35;
}

.article-card p {
  color: var(--text-muted);
  font-size: 1.02rem;
  flex-grow: 1;
  margin-bottom: 1.3rem;
}

/* Contact page */
.contact-wrapper {
  max-width: 920px;
  margin: 4rem auto;
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 4rem;
  align-items: start;
}

@media (max-width: 900px) {
  .contact-wrapper {
    grid-template-columns: 1fr;
  }
}

.contact-form {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.6rem;
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 1.6rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.55rem;
  font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 1rem;
  font-family: inherit;
  background: #FFFEFA;
}

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

.submit-btn {
  width: 100%;
  background: var(--accent);
  color: white;
  border: none;
  padding: 1.05rem;
  font-size: 1.05rem;
  font-weight: 600;
  border-radius: 999px;
  cursor: pointer;
  transition: var(--transition);
}

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

/* Legal pages */
.legal-page {
  max-width: 800px;
  margin: 4rem auto;
  padding: 0 2rem;
}

.legal-page h1 {
  font-size: 2.7rem;
  margin-bottom: 0.4rem;
}

.legal-page .updated {
  color: var(--text-muted);
  margin-bottom: 3.2rem;
}

.legal-page h2 {
  margin: 2.6rem 0 1.1rem;
  font-size: 1.35rem;
  color: var(--accent-dark);
}

.legal-page p,
.legal-page li {
  color: var(--text-muted);
  margin-bottom: 1.1rem;
}

/* Thank you */
.thank-hero {
  background: var(--accent);
  color: #F9F7FC;
  padding: 5rem 0;
  text-align: center;
}

.thank-content {
  max-width: 680px;
  margin: 3.5rem auto;
  padding: 0 2rem;
}

.thank-content p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* Footer - exact new text */
footer {
  background: #2A2A3A;
  color: #C8C4D4;
  padding: 4rem 0 3rem;
  font-size: 0.92rem;
}

.footer-content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 3rem;
}

@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr;
  }
}

.footer-brand h4 {
  color: #F9F7FC;
  font-family: Georgia, serif;
  font-size: 1.35rem;
  margin-bottom: 0.8rem;
}

.footer-links a {
  color: #C8C4D4;
  display: block;
  margin-bottom: 0.55rem;
}

.footer-links a:hover {
  color: #A89BB8;
}

.footer-bottom {
  margin-top: 3.5rem;
  padding-top: 2.2rem;
  border-top: 1px solid rgba(200, 196, 212, 0.2);
  text-align: center;
  font-size: 0.82rem;
  opacity: 0.75;
}

/* Responsive */
@media (max-width: 768px) {
  .nav {
    display: none;
  }
  .mobile-menu {
    display: block;
  }
  .hero h1 {
    font-size: 2.7rem;
  }
  .article-grid {
    grid-template-columns: 1fr;
  }
}