/* ==========================================================
   style.css - Personal Homepage
   Theme: Blue-White Professional / Minimal
   ========================================================== */

:root {
  --primary-blue: #1a5bb8;
  --dark-blue: #103a75;
  --light-blue: #eaf2fc;
  --accent-blue: #4d8fe0;
  --white: #ffffff;
  --gray-text: #444444;
  --gray-border: #dde6f2;
  --max-width: 1000px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Segoe UI", "Sarabun", Tahoma, sans-serif;
  color: var(--gray-text);
  background-color: var(--white);
  line-height: 1.7;
}

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

img {
  max-width: 100%;
  display: block;
}

/* ---------- Header / Navigation ---------- */
header {
  background-color: var(--white);
  border-bottom: 1px solid var(--gray-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  flex-wrap: wrap;
}

.site-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--dark-blue);
}

nav ul {
  list-style: none;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

nav ul li a {
  display: block;
  padding: 8px 14px;
  border-radius: 6px;
  color: var(--gray-text);
  font-weight: 500;
  transition: background-color 0.2s, color 0.2s;
}

nav ul li a:hover,
nav ul li a.active {
  background-color: var(--light-blue);
  color: var(--primary-blue);
}

/* ---------- Layout wrapper ---------- */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px 20px 60px;
  min-height: 70vh;
}

/* ---------- Hero (Home) ---------- */
.hero {
  display: flex;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
  padding: 40px 0;
}

.hero-text {
  flex: 1;
  min-width: 260px;
}

.hero-text h1 {
  font-size: 2.2rem;
  color: var(--dark-blue);
  margin-bottom: 10px;
}

.hero-text p {
  margin-bottom: 18px;
}

.hero-photo {
  flex: 1;
  min-width: 220px;
  max-width: 300px;
  margin: 0 auto;
}

.hero-photo img {
  border-radius: 12px;
  border: 4px solid var(--light-blue);
}

.btn {
  display: inline-block;
  background-color: var(--primary-blue);
  color: var(--white);
  padding: 10px 22px;
  border-radius: 6px;
  font-weight: 600;
  transition: background-color 0.2s;
}

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

.btn-outline {
  background-color: transparent;
  border: 1.5px solid var(--primary-blue);
  color: var(--primary-blue);
}

.btn-outline:hover {
  background-color: var(--primary-blue);
  color: var(--white);
}

/* ---------- Section titles ---------- */
h2.section-title {
  color: var(--dark-blue);
  font-size: 1.6rem;
  margin-bottom: 24px;
  border-left: 5px solid var(--primary-blue);
  padding-left: 12px;
}

/* ---------- Cards (Portfolio / Gallery / Activities) ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.card {
  background-color: var(--white);
  border: 1px solid var(--gray-border);
  border-radius: 10px;
  padding: 18px;
  transition: box-shadow 0.2s, transform 0.2s;
}

.card:hover {
  box-shadow: 0 6px 18px rgba(26, 91, 184, 0.12);
  transform: translateY(-3px);
}

.card h3 {
  color: var(--dark-blue);
  margin-bottom: 8px;
}

.card p {
  font-size: 0.95rem;
  margin-bottom: 14px;
}

.card-actions {
  display: flex;
  gap: 10px;
}

.card-actions .btn {
  padding: 6px 16px;
  font-size: 0.9rem;
}

/* ---------- CV Page ---------- */
.cv-section {
  margin-bottom: 30px;
}

.cv-section h3 {
  color: var(--primary-blue);
  margin-bottom: 10px;
  font-size: 1.15rem;
}

.cv-section ul {
  margin-left: 20px;
}

.skills-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skills-tags span {
  background-color: var(--light-blue);
  color: var(--dark-blue);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 500;
}

.contact-line {
  margin-bottom: 6px;
}

/* ---------- Contact Form ---------- */
form {
  max-width: 500px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

label {
  font-weight: 600;
  margin-bottom: 6px;
  display: block;
  color: var(--dark-blue);
}

input[type="text"],
input[type="email"],
textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--gray-border);
  border-radius: 6px;
  font-family: inherit;
  font-size: 1rem;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary-blue);
}

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

button[type="submit"] {
  cursor: pointer;
  border: none;
  align-self: flex-start;
}

/* ---------- Image gallery ---------- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.gallery-grid figure {
  border: 1px solid var(--gray-border);
  border-radius: 10px;
  overflow: hidden;
}

.gallery-grid img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.gallery-grid figcaption {
  padding: 8px 10px;
  font-size: 0.9rem;
  text-align: center;
  color: var(--gray-text);
  background-color: var(--light-blue);
}

/* ---------- Footer ---------- */
footer {
  background-color: var(--light-blue);
  text-align: center;
  padding: 20px;
  font-size: 0.9rem;
  color: var(--gray-text);
}

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  .nav-container {
    flex-direction: column;
    align-items: flex-start;
  }
  nav ul {
    gap: 4px;
  }
  .hero {
    flex-direction: column-reverse;
    text-align: center;
  }
}

/* ==========================================================
   HW9 Additions: ASP.NET Dynamic Content / JS / Guestbook
   ========================================================== */

/* ---------- Server info table (index.aspx) ---------- */
.info-box {
  margin-top: 30px;
}

.server-info-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 12px;
}

.server-info-table td {
  padding: 12px 14px;
  border: 1px solid var(--gray-border);
}

.server-info-table td:first-child {
  background-color: var(--light-blue);
  color: var(--dark-blue);
  width: 60%;
}

.hint {
  font-size: 0.9rem;
  color: #777;
  font-style: italic;
}

/* ---------- Success alert (contact.aspx) ---------- */
.alert-success {
  background-color: #e6f7ec;
  border: 1px solid #8fd6ac;
  color: #1f7a44;
  padding: 14px 18px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-weight: 500;
}

/* ---------- Portfolio card detail toggle ---------- */
.card-detail {
  background-color: var(--light-blue);
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 0.9rem;
  margin-bottom: 14px;
}

/* ---------- Skills highlight ---------- */
.highlight-card {
  border: 2px solid var(--primary-blue);
  box-shadow: 0 6px 18px rgba(26, 91, 184, 0.25);
}

.skills-tags span {
  cursor: pointer;
}

.skills-tags span:hover {
  background-color: var(--accent-blue);
  color: var(--white);
}

/* ---------- Gallery lightbox ---------- */
.gallery-grid figure {
  cursor: pointer;
}

.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(16, 58, 117, 0.9);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.lightbox img {
  max-width: 90%;
  max-height: 75vh;
  border-radius: 10px;
  border: 4px solid var(--white);
}

.lightbox p {
  color: var(--white);
  margin-top: 14px;
  font-size: 1.05rem;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 30px;
  color: var(--white);
  font-size: 2rem;
  cursor: pointer;
}

/* ---------- Guestbook page ---------- */
.guestbook-form-box {
  background-color: var(--light-blue);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 30px;
}

.guestbook-form-box h3,
.guestbook-list-box h3 {
  color: var(--dark-blue);
  margin-bottom: 14px;
}

.guestbook-form-box form {
  max-width: 100%;
}

.guestbook-list {
  list-style: none;
}

.guestbook-list li {
  background-color: var(--white);
  border: 1px solid var(--gray-border);
  border-left: 4px solid var(--primary-blue);
  border-radius: 6px;
  padding: 12px 16px;
  margin-bottom: 10px;
}