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

:root {
  --bg: #111111;
  --bg-secondary: #1c1c1e;
  --text-primary: #f0f0f0;
  --text-secondary: #888888;
  --border: rgba(255, 255, 255, 0.10);
  --border-md: rgba(255, 255, 255, 0.22);
  --radius-md: 8px;
  --radius-lg: 12px;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
}

[data-theme="light"] {
  --bg: #ffffff;
  --bg-secondary: #f6f6f7;
  --text-primary: #111111;
  --text-secondary: #6b6b6b;
  --border: rgba(0, 0, 0, 0.10);
  --border-md: rgba(0, 0, 0, 0.20);
}

.theme-switch {
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  margin-left: 1rem;
  flex-shrink: 0;
}

.theme-switch input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.theme-switch-track {
  position: relative;
  width: 52px;
  height: 28px;
  background: #111111;
  border: 0.5px solid var(--border-md);
  border-radius: 20px;
  transition: background 0.2s;
}

.theme-switch-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 22px;
  height: 22px;
  background: #ffffff;
  border-radius: 50%;
  transition: transform 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
}

.icon-sun {
  display: none;
}

.icon-moon {
  display: block;
}

.theme-switch input:checked~.theme-switch-track .theme-switch-thumb {
  transform: translateX(24px);
}

.theme-switch input:checked~.theme-switch-track .icon-moon {
  display: none;
}

.theme-switch input:checked~.theme-switch-track .icon-sun {
  display: block;
}

html {
  scroll-behavior: smooth;
}

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

.portfolio {
  max-width: 860px;
  margin: 0 auto;
  padding: 2rem 1.5rem 5rem;
}

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

.menu-toggle .bar {
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
}

/* NAV */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 2.5rem;
  border-bottom: 0.5px solid var(--border);
  margin-bottom: 4rem;
}

.logo {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}

.logo span {
  color: var(--text-secondary);
  font-weight: 400;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}

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

/* HERO */
.hero {
  margin-bottom: 5rem;
}

.hero-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  border: 0.5px solid var(--border-md);
  border-radius: 20px;
  padding: 4px 12px;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -1.5px;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  max-width: 600px;
}

.hero h1 em {
  font-style: normal;
  color: var(--text-secondary);
}

.hero p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 480px;
  margin-bottom: 2rem;
}

.hero-cta {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn-primary {
  font-size: 13px;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  border: 0.5px solid var(--border-md);
  background: var(--text-primary);
  color: var(--bg);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: opacity 0.15s;
}

.btn-primary:hover {
  opacity: 0.75;
}

.btn-secondary {
  font-size: 13px;
  font-weight: 400;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  border: 0.5px solid var(--border-md);
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: background 0.15s;
}

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

/* SECTIONS */
section {
  margin-bottom: 4.5rem;
}

.section-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 1.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 0.5px solid var(--border);
}

/* ABOUT */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.about-text {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
}

.about-stats {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.stat-item {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
}

.stat-num {
  font-size: 22px;
  font-weight: 500;
  color: var(--text-primary);
}

.stat-desc {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* PROJECTS */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.project-card {
  background: var(--bg);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  transition: border-color 0.2s;
  text-decoration: none;
  display: block;
}

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

.project-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 16px;
}

.project-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.project-desc {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

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

.tag {
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 20px;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border: 0.5px solid var(--border);
}

/* SKILLS */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.skill-group {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
}

.skill-group-title {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.6rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* CONTACT */
.contact-box {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.contact-text h3 {
  font-size: 18px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.contact-text p {
  font-size: 13px;
  color: var(--text-secondary);
}

.contact-links {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/*BLOG*/
.blog-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.back-link a {
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}

.back-link a:hover {
  color: var(--text-primary);
}

/* ARTICLE */
.article-content {
  max-width: 680px;
  margin: 0 auto;
}

.article-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin: 1rem 0 2rem;
}

.article-body {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.article-body h2 {
  color: var(--text-primary);
  margin: 2.5rem 0 1rem;
  font-size: 1.3rem;
  font-weight: 500;
  padding-bottom: 0.5rem;
  border-bottom: 0.5px solid var(--border);
}

.article-body h2:first-child {
  margin-top: 0;
}

.article-body h3 {
  color: var(--text-primary);
  margin: 1.5rem 0 0.75rem;
  font-size: 1.05rem;
  font-weight: 500;
}

.article-body p {
  margin-bottom: 1.25rem;
}

.article-body strong {
  color: var(--text-primary);
  font-weight: 600;
}

.article-body ul,
.article-body ol {
  margin: 0 0 1.25rem 1.25rem;
  padding: 0;
}

.article-body li {
  margin-bottom: 0.5rem;
  padding-left: 0.25rem;
}

.article-body li::marker {
  color: var(--text-secondary);
}

.article-body code {
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  color: var(--text-primary);
}

.article-body pre {
  background: var(--bg-secondary);
  padding: 1rem;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: 1.25rem;
}

.article-body pre code {
  background: none;
  padding: 0;
}

.article-body a {
  color: var(--text-primary);
  text-decoration: underline;
}

/*ADMIN*/
.lock-screen {
  max-width: 400px;
  margin: 4rem auto;
  text-align: center;
}

.lock-form {
  display: flex;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.lock-form input {
  flex: 1;
  font-family: var(--font);
  font-size: 14px;
  padding: 10px 14px;
  border: 0.5px solid var(--border-md);
  border-radius: var(--radius-md);
  background: var(--bg);
  color: var(--text-primary);
}

.admin-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 600px;
  margin-top: 1.5rem;
}

.admin-form input,
.admin-form textarea {
  width: 100%;
  box-sizing: border-box;
  font-family: var(--font);
  font-size: 14px;
  padding: 10px 14px;
  border: 0.5px solid var(--border-md);
  border-radius: var(--radius-md);
  background: var(--bg);
  color: var(--text-primary);
}

.feedback-text {
  margin-top: 1rem;
  font-size: 13px;
  color: var(--text-secondary);
}

.admin-article-row {
  margin-bottom: 0.75rem;
}

/* RESPONSIVE */
@media (max-width: 600px) {
  nav {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
  }

  .logo {
    order: 1;
  }

  .theme-switch {
    order: 2;
    margin-left: auto;
  }

  .menu-toggle {
    order: 3;
    display: flex;
  }

  .nav-links {
    order: 4;
    display: none;
    flex-direction: column;
    width: 100%;
    gap: 1rem;
    margin-top: 1rem;
  }

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

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

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

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

  .contact-box {
    flex-direction: column;
    align-items: flex-start;
  }
}