/* ---------- Variables ---------- */
:root {
  --bg: #0a0a0a;
  --card: #151515;
  --border: #2a2a2a;
  --text: #ffffff;
  --text-secondary: #a0a0a0;
  --accent: #ff6a00;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.6;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ---------- Navbar ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(10, 10, 10, 0.9);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(6px);
}

.nav-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.2rem;
  font-weight: 600;
}

.accent {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--accent);
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.hamburger span {
  width: 22px;
  height: 2px;
  background-color: var(--text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--accent);
  color: #0a0a0a;
}

.btn-primary:hover {
  background-color: #e65f00;
}

.btn-secondary {
  border-color: var(--border);
  color: var(--text);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---------- Hero ---------- */
.intro {
  min-height: 90vh;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border);
}

.intro-content {
  padding: 60px 24px;
}

.intro-greeting {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.intro-name {
  font-size: 3.2rem;
  font-weight: 700;
  margin: 4px 0 12px;
}

.intro-role {
  color: var(--accent);
  font-size: 1rem;
  margin-bottom: 16px;
}

.intro-text {
  max-width: 480px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.intro-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.intro-tag {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.controller-icon {
  font-size: 1rem;
}

/* ---------- Sections ---------- */
.section {
  padding: 70px 0;
  border-bottom: 1px solid var(--border);
}

.section-title {
  font-size: 1.7rem;
  font-weight: 600;
  margin-bottom: 32px;
}

/* ---------- About ---------- */
.about-text {
  max-width: 600px;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 14px;
}

/* ---------- Skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.skill-group h3 {
  font-size: 1rem;
  margin-bottom: 14px;
  color: var(--text);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  background-color: var(--card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: 5px;
  font-size: 0.85rem;
}

/* ---------- Projects ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.project-card {
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  transition: border-color 0.2s ease, transform 0.2s ease;
  opacity: 0;
  transform: translateY(12px);
}

.project-card.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

.project-number {
  display: inline-block;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 8px;
}

.project-card h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.project-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-bottom: 16px;
}

.project-card .tag-list {
  margin-bottom: 18px;
}

.project-links {
  display: flex;
  gap: 20px;
}

.project-links a {
  font-size: 0.9rem;
  color: var(--text);
  transition: color 0.2s ease;
}

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

/* ---------- Currently Learning ---------- */
.learning-list .tag {
  font-size: 0.9rem;
  padding: 8px 14px;
}

/* ---------- Contact ---------- */
.contact-text {
  color: var(--text-secondary);
  max-width: 500px;
  margin-bottom: 28px;
}

.contact-list {
  display: flex;
  flex-direction: column;
}

.contact-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
  transition: border-color 0.2s ease;
}

.contact-row:hover {
  border-bottom-color: var(--accent);
}

.contact-left {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1rem;
  color: var(--text);
  transition: color 0.2s ease;
}

.contact-row:hover .contact-left {
  color: var(--accent);
}

.contact-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.contact-right {
  color: var(--text-secondary);
  font-size: 0.95rem;
  text-align: right;
}

/* ---------- Footer ---------- */
.footer {
  padding: 30px 0;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

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

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 40px;
  height: 40px;
  border-radius: 6px;
  background-color: var(--card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1.1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.back-to-top:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---------- Focus states (accessibility) ---------- */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .project-card {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .skills-grid {
    grid-template-columns: 1fr;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .intro-name {
    font-size: 2.4rem;
  }
}

@media (max-width: 640px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 16px 24px;
    gap: 16px;
    display: none;
  }

  .nav-links.open {
    display: flex;
  }

  .hamburger {
    display: flex;
  }
}