:root {
  --color-primary: #0a1f44;
  --color-primary-light: #163268;
  --color-accent: #1c3f94;
  --color-text: #1f2430;
  --color-text-muted: #55606e;
  --color-bg: #ffffff;
  --color-bg-alt: #f4f6f9;
  --color-border: #dde2e8;
  --font-sans: "Sarabun", "Georgia", "Cambria", "Times New Roman", serif;
  --font-ui: "Sarabun", "Helvetica Neue", Arial, sans-serif;
  --max-width: 1140px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-ui);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

h1, h2, h3 {
  font-family: var(--font-sans);
  color: var(--color-primary);
  line-height: 1.25;
}

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

a:hover {
  text-decoration: underline;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  background: var(--color-primary);
  border-bottom: 3px solid var(--color-accent);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
}

.logo {
  font-family: var(--font-sans);
  font-size: 1.3rem;
  font-weight: bold;
  color: #ffffff;
}

.logo:hover {
  text-decoration: none;
  opacity: 0.9;
}

.main-nav a {
  color: #d7deeb;
  margin-left: 28px;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.main-nav a:hover {
  color: #ffffff;
  text-decoration: none;
}

.main-nav a.active {
  color: #ffffff;
  border-bottom: 2px solid #ffffff;
  padding-bottom: 4px;
}

/* Hero */
.hero {
  padding: 64px 24px 40px;
  text-align: left;
}

.hero-with-photo {
  display: flex;
  align-items: center;
  gap: 40px;
}

.hero-photo {
  width: 240px;
  height: 240px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center 30%;
  border: 1px solid var(--color-primary-light);
  flex-shrink: 0;
}

.hero-text {
  flex: 1;
}

@media (max-width: 600px) {
  .hero-with-photo {
    flex-direction: column;
    text-align: center;
  }
}

.hero h1 {
  font-size: 2.6rem;
  margin-bottom: 4px;
}

.subtitle {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  margin-top: 0;
  margin-bottom: 20px;
}

.intro {
  max-width: 640px;
  color: var(--color-text-muted);
}

.hero-actions {
  margin-top: 28px;
}

.btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 3px;
  font-family: var(--font-ui);
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
}

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

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
  margin-left: 12px;
}

.btn-secondary:hover {
  background: var(--color-bg-alt);
}

/* About summary */
.about-summary {
  padding: 20px 24px 64px;
  border-top: 1px solid var(--color-border);
  margin-top: 24px;
}

.logo-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 28px;
}

.org-logo {
  height: 128px;
  width: 128px;
  object-fit: contain;
}

/* Resume page */
.resume-page {
  padding: 48px 24px 64px;
}

.resume-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.resume-section {
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.resume-section h2 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.resume-entry {
  margin-bottom: 22px;
}

.entry-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
}

.entry-header h3 {
  margin: 0;
  font-size: 1.05rem;
}

.entry-date {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.entry-subtitle {
  margin: 2px 0 8px;
  font-style: italic;
  color: var(--color-text-muted);
}

.resume-entry ul {
  margin: 0;
  padding-left: 20px;
}

.pa-table-wrap {
  margin-top: 16px;
  overflow-x: auto;
}

.pa-table {
  width: 100%;
  min-width: 900px;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.pa-table th,
.pa-table td {
  border: 1px solid var(--color-border);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

.pa-table th {
  background: var(--color-surface, #f5f5f5);
  font-weight: 600;
  text-align: center;
}

.skills-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  margin: 0;
}

.skills-list li {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  padding: 6px 14px;
  border-radius: 3px;
  font-size: 0.9rem;
}

/* Projects page */
.page-intro {
  color: var(--color-text-muted);
  margin-top: 0;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin: 32px 0 64px;
}

.project-card {
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 22px;
  background: var(--color-bg-alt);
}

.project-card h3 {
  margin-top: 0;
  font-size: 1.1rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0;
}

.project-tags span {
  font-size: 0.78rem;
  color: var(--color-primary);
  background: #ffffff;
  border: 1px solid var(--color-border);
  padding: 3px 9px;
  border-radius: 3px;
}

.project-links a {
  margin-right: 16px;
  font-size: 0.9rem;
  font-weight: 600;
}

/* Gallery */
.gallery-category-title {
  margin: 40px 0 16px;
}

.gallery-category:first-child .gallery-category-title {
  margin-top: 0;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
  margin: 32px 0 64px;
}

.gallery-item {
  margin: 0;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  overflow: hidden;
  background: var(--color-bg-alt);
}

.gallery-item img {
  display: block;
  width: 100%;
  height: 220px;
  object-fit: cover;
  object-position: top;
}

/* Documents */
.document-list {
  list-style: none;
  margin: 32px 0 64px;
  padding: 0;
  border-top: 1px solid var(--color-border);
}

.document-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 4px;
  border-bottom: 1px solid var(--color-border);
}

.document-name {
  font-size: 1rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 24px 0;
  margin-top: 40px;
}

.site-footer p {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin: 0;
}

@media (max-width: 600px) {
  .header-inner {
    flex-direction: column;
    gap: 12px;
  }
  .main-nav a {
    margin: 0 12px;
  }
  .resume-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}