/* =============================================
   Virak Sun Portfolio - Custom Styles
   Modern, Professional & Clean Design
   ============================================= */

/* --- CSS Custom Properties --- */
:root {
  --primary: #06b3d1;
  --primary-dark: #0599b2;
  --primary-light: #d4f3f9;
  --primary-subtle: #edf9fc;
  --heading-color: #1e293b;
  --text-color: #475569;
  --text-muted: #94a3b8;
  --border-color: #e2e8f0;
  --bg-section: #f8fafc;
  --white: #ffffff;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  /* Bootstrap overrides */
  --bs-primary: #06b3d1;
  --bs-primary-rgb: 6, 179, 209;
  --bs-primary-bg-subtle: #d4f3f9;
  --bs-primary-border-subtle: #7adced;
  --bs-primary-text-emphasis: #047a90;
}

/* --- Base Styles --- */
html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-color);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Poppins', sans-serif;
  color: var(--heading-color);
  font-weight: 600;
  line-height: 1.3;
}

main {
  margin-top: 5rem;
  padding-bottom: 2rem;
}

/* --- Bootstrap Primary Override --- */
.btn-primary {
  --bs-btn-color: #fff;
  --bs-btn-bg: var(--primary);
  --bs-btn-border-color: var(--primary);
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: var(--primary-dark);
  --bs-btn-hover-border-color: var(--primary-dark);
  --bs-btn-focus-shadow-rgb: 6, 179, 209;
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: var(--primary-dark);
  --bs-btn-active-border-color: var(--primary-dark);
  --bs-btn-disabled-color: #fff;
  --bs-btn-disabled-bg: var(--primary);
  --bs-btn-disabled-border-color: var(--primary);
  border-radius: 50px;
  padding: 0.5rem 1.5rem;
  font-weight: 500;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-outline-secondary {
  border-radius: 50px;
  padding: 0.5rem 1.5rem;
  font-weight: 500;
  transition: var(--transition);
}

.btn-outline-secondary:hover {
  transform: translateY(-1px);
}

.bg-primary {
  background-color: var(--primary) !important;
}

.text-primary {
  color: var(--primary) !important;
}

.border-primary {
  border-color: var(--primary) !important;
}

/* --- Navbar --- */
.navbar-custom {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  padding: 0.75rem 0;
  transition: var(--transition);
}

.navbar-custom.scrolled {
  border-bottom-color: var(--border-color);
  box-shadow: var(--shadow-sm);
}

.navbar-custom .navbar-brand {
  color: var(--heading-color);
  font-weight: 700;
  font-size: 1.25rem;
  font-family: 'Poppins', sans-serif;
  letter-spacing: -0.02em;
}

.navbar-custom .navbar-brand:hover {
  color: var(--primary);
}

.navbar-custom .nav-link {
  color: var(--text-color);
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.5rem 1rem;
  border-radius: 50px;
  transition: var(--transition);
  position: relative;
}

.navbar-custom .nav-link:hover {
  color: var(--primary);
  background-color: var(--primary-subtle);
}

.navbar-custom .nav-link.active {
  color: var(--primary);
  background-color: var(--primary-light);
}

.navbar-custom .lang-select {
  border: 1px solid var(--border-color);
  color: var(--text-color);
  font-weight: 500;
  font-size: 0.85rem;
  border-radius: 50px;
  padding: 0.35rem 0.75rem;
  background-color: var(--white);
  transition: var(--transition);
  cursor: pointer;
}

.navbar-custom .lang-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(6, 179, 209, 0.1);
  outline: none;
}

.navbar-custom .navbar-toggler {
  border-color: var(--border-color);
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
}

.navbar-custom .navbar-toggler:focus {
  box-shadow: 0 0 0 3px rgba(6, 179, 209, 0.1);
}

.navbar-custom .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(30, 41, 59, 0.75)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* --- Hero Section --- */
.hero-section {
  background: linear-gradient(135deg, var(--primary-subtle) 0%, #f0f4ff 50%, var(--white) 100%);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  margin-bottom: 3rem;
  border: 1px solid rgba(6, 179, 209, 0.08);
}

.hero-avatar {
  width: 160px;
  height: 160px;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid var(--white);
  box-shadow: 0 0 0 4px rgba(6, 179, 209, 0.15), var(--shadow-lg);
}

.hero-section h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.hero-section .hero-description {
  font-size: 1.05rem;
  color: var(--text-color);
  line-height: 1.8;
  max-width: 600px;
}

.hero-section .hero-description p {
  margin-bottom: 0.5rem;
}

/* --- Hero Years Badge --- */
.hero-years-badge {
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
  font-family: 'Poppins', sans-serif;
  letter-spacing: 0.02em;
}

.hero-years-number {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}

.hero-years-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Section Headers --- */
.section-header {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--heading-color);
  padding-top: 2rem;
  margin-top: 1rem;
  margin-bottom: 1.75rem;
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-header::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 40px;
  height: 3px;
  background-color: var(--primary);
  border-radius: 2px;
}

.section-header i {
  color: var(--primary);
  font-size: 1.3rem;
}

/* --- Experience Timeline --- */
.experience-item {
  position: relative;
  padding-left: 1.75rem;
  padding-bottom: 1.5rem;
  border-left: 2px solid var(--border-color);
  margin-left: 0.5rem;
}

.experience-item::before {
  content: '';
  position: absolute;
  left: -6px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--primary);
  border: 2px solid var(--white);
  box-shadow: 0 0 0 2px var(--primary);
}

.experience-item.current::before {
  background-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary), 0 0 0 5px rgba(6, 179, 209, 0.15);
}

.experience-item:last-child {
  border-left-color: transparent;
}

.experience-header {
  margin-bottom: 0.5rem;
}

.experience-header .job-title {
  font-weight: 600;
  color: var(--heading-color);
  font-size: 1.05rem;
}

.experience-header .company {
  color: var(--primary);
  font-weight: 500;
}

.experience-header .date-range {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 400;
}

.experience-header .location {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

.project-block {
  background-color: var(--bg-section);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  margin-top: 0.75rem;
  margin-bottom: 0.75rem;
  border: 1px solid var(--border-color);
}

.project-block .project-title {
  font-weight: 600;
  color: var(--heading-color);
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

.project-block ul {
  margin-bottom: 0.75rem;
  padding-left: 1.25rem;
}

.project-block li {
  margin-bottom: 0.25rem;
  font-size: 0.925rem;
}

/* --- Tech Tags --- */
.tech-tag {
  display: inline-block;
  background-color: var(--primary-light);
  color: var(--primary-dark);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.2rem 0.65rem;
  border-radius: 50px;
  margin: 0.15rem 0.15rem;
}

/* --- Toggle Buttons --- */
.toggle-btn {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-color);
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.5rem 1.25rem;
  border-radius: 50px;
  transition: var(--transition);
  cursor: pointer;
}

.toggle-btn:hover {
  background-color: var(--bg-section);
  border-color: var(--primary);
  color: var(--primary);
}

.toggle-btn i {
  transition: transform 0.3s ease;
}

/* --- Certifications --- */
.certification-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-color);
}

.certification-item:last-child {
  border-bottom: none;
}

.certification-year {
  background-color: var(--primary-light);
  color: var(--primary-dark);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.2rem 0.65rem;
  border-radius: 50px;
  white-space: nowrap;
}

.certification-label {
  font-size: 0.95rem;
  color: var(--heading-color);
}

/* --- Side Project Cards --- */
.project-card {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  background: var(--white);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(6, 179, 209, 0.2);
}

.project-card .card-img-container {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-section);
  border-bottom: 1px solid var(--border-color);
  overflow: hidden;
}

.project-card .card-img-container img {
  max-height: 180px;
  object-fit: contain;
}

.project-card .card-img-container .placeholder-icon {
  text-align: center;
  color: var(--text-muted);
}

.project-card .card-img-container .placeholder-icon i {
  font-size: 2.5rem;
  color: var(--primary);
  opacity: 0.5;
}

.project-card .card-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-card .card-category {
  display: inline-block;
  background-color: var(--primary-light);
  color: var(--primary-dark);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.65rem;
  border-radius: 50px;
  margin-bottom: 0.75rem;
  width: fit-content;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.project-card .card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--heading-color);
  margin-bottom: 0.5rem;
}

.project-card .card-text {
  font-size: 0.9rem;
  color: var(--text-color);
  line-height: 1.6;
  flex-grow: 1;
}

.project-card .tech-tags {
  margin-bottom: 1rem;
}

/* --- Collapse Content --- */
.collapse-content {
  background-color: var(--bg-section);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-top: 0.75rem;
}

/* --- Footer --- */
.site-footer {
  background-color: var(--heading-color);
  color: rgba(255, 255, 255, 0.7);
  padding: 2.5rem 0;
  margin-top: 4rem;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  transition: var(--transition);
}

.site-footer a:hover {
  color: var(--white);
}

.site-footer .footer-brand {
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--white);
}

.site-footer .footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.8);
  font-size: 1rem;
  transition: var(--transition);
  margin: 0 0.25rem;
}

.site-footer .footer-social a:hover {
  background-color: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
}

.site-footer .footer-text {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
}

/* --- Scroll Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .hero-section {
    padding: 2rem 1.25rem;
    text-align: center;
  }

  .hero-section h1 {
    font-size: 1.6rem;
  }

  .hero-avatar {
    width: 120px;
    height: 120px;
    margin-bottom: 1.25rem;
  }

  .hero-section .hero-description {
    max-width: 100%;
  }

  .section-header {
    font-size: 1.3rem;
  }

  .experience-item {
    padding-left: 1.25rem;
  }

  main {
    margin-top: 4.5rem;
  }
}