/* ========================================
   CSS Variables & Theme
   ======================================== */
:root {
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --accent: #1a5276;
  --accent-light: #2980b9;
  --bg: #ffffff;
  --bg-alt: #f5f6f7;
  --text: #1a1a1a;
  --text-secondary: #555;
  --border: #e0e0e0;
  --card-bg: #ffffff;
  --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  --nav-bg: rgba(255, 255, 255, 0.95);
  --tag-bg: #eaf0f5;
  --tag-text: #1a5276;
  --exam-passed: #1a7a4c;
  --exam-sitting: #b07d10;
  --transition: 0.2s ease;
}

[data-theme="dark"] {
  --accent: #5dade2;
  --accent-light: #85c1e9;
  --bg: #111418;
  --bg-alt: #181c21;
  --text: #e4e4e4;
  --text-secondary: #a0a0a0;
  --border: #2a2e34;
  --card-bg: #1c2028;
  --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  --nav-bg: rgba(17, 20, 24, 0.95);
  --tag-bg: #1c2a38;
  --tag-text: #5dade2;
  --exam-passed: #2ecc71;
  --exam-sitting: #f0c040;
}

/* ========================================
   Reset & Base
   ======================================== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
}

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

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

ul {
  list-style: none;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========================================
   Header / Nav
   ======================================== */
#header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}

.nav-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

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

/* Theme toggle */
#theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px;
  cursor: pointer;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition), border-color var(--transition);
}

#theme-toggle:hover {
  color: var(--text);
  border-color: var(--text-secondary);
}

.icon-moon { display: none; }

[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ========================================
   Hero
   ======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

#about {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 64px;
  box-sizing: border-box;
}


.hero-layout {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
}

.hero-avatar {
  width: 320px;
  height: 320px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 3px solid var(--border);
  transition: border-color var(--transition);
}

.hero-text {
  text-align: left;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.hero-tagline {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 28px;
  white-space: nowrap;
}

.hero-actions {
  display: flex;
  justify-content: flex-start;
  gap: 12px;
  margin-bottom: 24px;
}

.hero-links {
  display: flex;
  justify-content: flex-start;
  gap: 16px;
}

.hero-links a {
  color: var(--text-secondary);
  transition: color var(--transition);
}

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

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 24px;
  border-radius: 6px;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.btn:hover {
  background: var(--accent-light);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

.btn-outline:hover {
  background: var(--accent);
  color: #fff;
}

/* ========================================
   Sections
   ======================================== */
.section {
  padding: 72px 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 32px;
  letter-spacing: -0.3px;
}

/* ========================================
   About
   ======================================== */
.about-text {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.75;
  max-width: 680px;
}

/* ========================================
   Experience (Card with Logo)
   ======================================== */
.exp-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.exp-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  box-shadow: var(--card-shadow);
  transition: border-color var(--transition), background var(--transition);
}

.exp-card:hover {
  border-color: var(--accent);
}

.exp-logo {
  flex-shrink: 0;
}

.exp-logo-placeholder {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: var(--tag-bg);
  color: var(--tag-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: -0.5px;
}

.exp-logo img {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  object-fit: contain;
  background: #fff;
  border: 1px solid var(--border);
}

.exp-info {
  flex: 1;
  min-width: 0;
}

.exp-role {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.exp-detail-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
}

.exp-detail-row span {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.exp-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 6px;
  font-style: italic;
}

.exp-company {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.exp-date {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.exp-location {
  font-size: 0.82rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

/* ========================================
   Projects
   ======================================== */
.projects-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.project-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  box-shadow: var(--card-shadow);
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.project-card:hover {
  border-color: var(--accent);
}

.project-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.project-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  line-height: 1.5;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.project-tags span {
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--tag-bg);
  color: var(--tag-text);
  padding: 3px 10px;
  border-radius: 4px;
}

.project-link {
  font-size: 0.85rem;
  font-weight: 500;
}

/* ========================================
   Actuarial Exams
   ======================================== */
.exams-track {
  font-size: 0.95rem;
  color: var(--accent);
  font-weight: 500;
  margin-top: -20px;
  margin-bottom: 24px;
}

.exams-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.exam-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  text-align: center;
  box-shadow: var(--card-shadow);
  transition: background var(--transition), border-color var(--transition);
}

.exam-status {
  margin-bottom: 12px;
}

.exam-passed .exam-status {
  color: var(--exam-passed);
}

.exam-sitting .exam-status {
  color: var(--exam-sitting);
}

.exam-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.exam-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.exam-date {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* ========================================
   Skills
   ======================================== */
.skills-group {
  margin-bottom: 24px;
}

.skills-group:last-child {
  margin-bottom: 0;
}

.skills-group h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}

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

.skills-tags span {
  font-size: 0.85rem;
  font-weight: 500;
  background: var(--tag-bg);
  color: var(--tag-text);
  padding: 6px 14px;
  border-radius: 5px;
}

/* ========================================
   Interests
   ======================================== */
.interests-photo {
  display: block;
  margin: 0 auto 32px;
  width: 100%;
  max-width: 500px;
  border-radius: 10px;
  object-fit: cover;
  border: 1px solid var(--border);
}

.interests-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}

.interest-item {
  width: calc(33.333% - 14px);
  min-width: 200px;
  text-align: center;
  padding: 24px 16px;
}

.interest-link {
  display: inline-block;
  margin-top: 8px;
  font-size: 0.85rem;
  font-weight: 500;
}

.interest-item svg {
  color: var(--accent);
  margin-bottom: 12px;
}

.interest-item h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.interest-item p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ========================================
   Mobile Responsive
   ======================================== */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    flex-direction: column;
    padding: 20px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s ease, opacity 0.25s ease;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .hero {
    padding: 120px 0 60px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-layout {
    flex-direction: column;
    text-align: center;
  }

  .hero-avatar {
    width: 200px;
    height: 200px;
  }

  .hero-text {
    text-align: center;
  }

  .hero-subtitle {
    white-space: normal;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .hero-links {
    justify-content: center;
  }

  .interest-item {
    width: 100%;
    min-width: 0;
  }

}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.7rem;
  }

  .hero-tagline {
    font-size: 0.95rem;
  }

  .section {
    padding: 56px 0;
  }

  .exp-card {
    padding: 16px;
  }
}