:root {
  --bg: #ffffff;
  --text: #000000;
  --muted-text: #444;
  --nav-bg: #ffffff;
  --border: #e5e5e5;
  --muted-bg: #f0f0f0;
  --dropdown-bg: #d9d9d9;
  --dropdown-hover: #e0e0e0;
  --dropdown-pill-bg: #171717;
  --dropdown-pill-text: #f8f8f8;
  --code-block-bg: #1e1e1e;
  --code-header-bg: #2d2d2d;
  --code-text: #e0e0e0;
  --bio-text: #444;
  --bio-strong: #000;
  --footer-bg: #1a1a1a;
  --footer-text: #cccccc;
  --footer-heading: #ffffff;
}

[data-theme="dark"] {
  --bg: #0f0f0f;
  --text: #e0e0e0;
  --muted-text: #999;
  --nav-bg: #141414;
  --border: #2a2a2a;
  --muted-bg: #2a2a2a;
  --dropdown-bg: #2a2a2a;
  --dropdown-hover: #333;
  --dropdown-pill-bg: #171717;
  --dropdown-pill-text: #f8f8f8;
  --code-block-bg: #1a1a1a;
  --code-header-bg: #252525;
  --code-text: #d4d4d4;
  --bio-text: #999;
  --bio-strong: #e0e0e0;
  --footer-bg: #0a0a0a;
  --footer-text: #cccccc;
  --footer-heading: #ffffff;
}

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

html {
  overflow-x: hidden;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--bg);
  color: var(--text);
  transition: background-color 0.3s ease, color 0.3s ease;
}

main {
  flex: 1;
}

/* --- Hero Section --- */
.hero {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15vh 10% 10vh 10%;
  gap: 60px;
}

.code-block {
  flex-shrink: 0;
  width: 380px;
  background: var(--code-block-bg);
  border-radius: 12px;
  overflow: visible;
  box-shadow: 0 20px 60px rgba(0,0,0,0.12);
  touch-action: none;
  position: relative;
}

.code-block::before {
  content: 'drag me';
  position: absolute;
  top: -32px;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  padding: 4px 14px;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--code-text);
  background: var(--code-header-bg);
  border-radius: 20px;
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: none;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.code-block::after {
  content: '';
  position: absolute;
  top: -11px;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  border: 6px 6px solid transparent;
  border-top-color: var(--code-header-bg);
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: none;
}

.code-block:hover::before,
.code-block:hover::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.code-header {
  display: flex;
  border-radius: 12px 12px 0 0;
  gap: 8px;
  padding: 14px 16px;
  background: var(--code-header-bg);
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.code-block pre {
  position: relative;
  margin: 0;
  padding: 20px;
  overflow: hidden;
  display: flex;
  align-items: flex-start;
}

.code-block code {
  font-family: "SF Mono", "Fira Code", "Fira Mono", Menlo, monospace;
  font-size: 14px;
  line-height: 1.8;
  color: var(--code-text);
  white-space: pre;
}

#typing-code::after {
  content: '|';
  animation: blink 0.8s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.intro h1 {
  font-size: 32px;
  font-weight: 600;
  line-height: 1.2;
}

/* --- About Section --- */
.about {
  margin-top: 10vh;
}

.marquee-container {
  overflow: hidden;
  white-space: nowrap;
  padding: 20px 0;
}

.marquee-inner {
  display: flex;
  width: max-content;
}

.marquee-inner h2 {
  font-size: 7vw;
  font-weight: 700;
  letter-spacing: 2px;
  padding-right: 20px;
}

.bio-container {
  padding: 60px 10% 100px 10%;
}

.bio-container p {
  font-size: 24px;
  line-height: 1.4;
  color: var(--bio-text);
  transition: color 0.3s ease;
}

.bio-container strong {
  color: var(--bio-strong);
  font-weight: 700;
  transition: color 0.3s ease;
}

/* --- Skills Tech Marquee --- */
.tech-marquee-container {
  overflow: hidden;
  white-space: nowrap;
  padding: 40px 0;
  background-color: var(--muted-bg);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.tech-marquee-inner {
  display: flex;
  width: max-content;
  align-items: center;
}

.tech-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 40px;
}

.tech-item img {
  width: 50px;
  height: 50px;
  object-fit: contain;
}

.tech-item span {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text);
}

.other-skills-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  padding: 80px 40px;
  max-width: 1200px;
  margin: 0 auto;
}

.skills-column h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 24px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 2px solid var(--text);
  padding-bottom: 10px;
  display: inline-block;
  color: var(--text);
}

.skills-column ul {
  list-style: none;
}

.skills-column li {
  font-size: 1.1rem;
  color: var(--bio-text);
  margin-bottom: 16px;
  position: relative;
  padding-left: 20px;
  transition: transform 0.3s ease, color 0.3s ease;
  cursor: default;
}

.skills-column li:hover {
  transform: translateX(8px);
  color: var(--text);
}

.skills-column li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--text);
  font-weight: bold;
  transition: transform 0.3s ease;
}

.skills-column li:hover::before {
  transform: scale(1.3);
}

@media (max-width: 900px) {
  .other-skills-container {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .other-skills-container {
    grid-template-columns: 1fr;
  }
}

/* --- Contact Section --- */
.contact-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px 40px;
}

.contact-header {
  margin-bottom: 80px;
}

.contact-header h2 {
  font-size: 4.5rem;
  font-weight: 400;
  text-transform: uppercase;
  line-height: 1.1;
  letter-spacing: 1px;
  color: var(--text);
}

.align-right {
  text-align: right;
}

.contact-content {
  display: flex;
  gap: 80px;
  justify-content: space-between;
}

.form-container {
  flex: 1.5;
}

.info-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.input-group label {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--muted-text);
  transition: color 0.3s ease;
}

.input-group:focus-within label {
  color: var(--text);
}

.input-group input,
.input-group textarea {
  width: 100%;
  padding: 15px 0;
  border: none;
  border-bottom: 2px solid var(--text);
  background: transparent;
  font-size: 16px;
  outline: none;
  transition: border-color 0.3s ease;
  color: var(--text);
}

.input-group {
  transition: transform 0.3s ease;
}

.input-group:focus-within {
  transform: translateY(-2px);
}

.input-group input:focus,
.input-group textarea:focus {
  border-bottom: 2px solid #666666;
}

.submit-btn,
.email-action-btn {
  display: inline-block;
  padding: 16px 32px;
  background-color: var(--text);
  color: var(--bg);
  border: 1px solid var(--text);
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  transition: all 0.3s ease;
  width: fit-content;
  border-radius: 30px;
}

.submit-btn:hover,
.email-action-btn:hover {
  background-color: var(--bg);
  color: var(--text);
}

.submit-btn:active,
.email-action-btn:active {
  transform: scale(0.96);
}

.submit-btn,
.email-action-btn {
  will-change: transform;
}

.info-container p {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
  color: var(--muted-text);
}

.social-links {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.social-icon {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
  font-size: 18px;
  font-weight: 500;
  transition: opacity 0.3s ease, transform 0.3s ease;
  will-change: transform;
}

.social-icon:hover {
  opacity: 0.6;
  transform: translateX(4px);
}

.social-icon svg {
  width: 28px;
  height: 28px;
  fill: currentColor;
}

@media (max-width: 900px) {
  .contact-content {
    flex-direction: column;
  }
  .contact-header h2 {
    font-size: 3rem;
  }
  .align-right {
    text-align: left;
  }
}

.section-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  border-top: 1px solid var(--border);
}

.section-placeholder h2 {
  font-size: 48px;
  font-weight: 600;
  color: var(--muted-text);
}

/* --- Works Section --- */
.works-section {
  padding: 80px 10%;
}

.works-header {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 60px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.works-header-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.works-header-bottom {
  display: flex;
  justify-content: center;
}

.title-left {
  font-weight: 400;
  font-size: 3.5rem;
  text-align: left;
  flex: 1;
}

.title-center {
  font-weight: 700;
  font-size: 3.5rem;
  text-align: center;
  flex: 1;
}

.title-right {
  font-weight: 400;
  font-size: 3.5rem;
  text-align: right;
  line-height: 1.1;
  flex: 1;
}

.works-grid {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.grid-row {
  display: flex;
  gap: 20px;
}

.large {
  flex: 2;
  display: flex;
  flex-direction: column;
}

.stacked-column {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.project-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.project-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

.project-box {
  background-color: #161616;
  width: 100%;
  border-radius: 4px;
}

[data-theme="dark"] .project-box {
  background-color: #2a2a2a;
}

.large .project-box {
  flex-grow: 1;
  min-height: 400px;
}

.stacked-column .project-card {
  flex: 1;
}

.stacked-column .project-box {
  height: 100%;
  min-height: 180px;
}

.works-coming-soon {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
  text-align: center;
}

.coming-soon-text {
  font-size: 4rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  animation: textGlow 3s ease-in-out infinite;
}

@keyframes textGlow {
  0%, 100% { text-shadow: 0 0 0px transparent; }
  50% { text-shadow: 0 0 30px rgba(0,0,0,0.08); }
}

[data-theme="dark"] .coming-soon-text {
  animation-name: textGlowDark;
}

@keyframes textGlowDark {
  0%, 100% { text-shadow: 0 0 0px transparent; }
  50% { text-shadow: 0 0 30px rgba(255,255,255,0.08); }
}

.coming-soon-sub {
  font-size: 1.25rem;
  color: var(--muted-text);
}

.coming-soon-sub a {
  color: var(--text);
  text-decoration: underline;
  font-weight: 600;
}

@media (max-width: 768px) {
  .grid-row {
    flex-direction: column;
  }
  .large .project-box,
  .stacked-column .project-box {
    min-height: 250px;
  }
}

@media (max-width: 1024px) {
  .hero {
    flex-direction: column;
    padding: 10vh 5% 8vh 5%;
    gap: 40px;
    align-items: flex-start;
  }

  .code-block {
    width: 100%;
    max-width: 380px;
  }

  .intro h1 {
    font-size: 28px;
  }

  .works-section {
    padding: 60px 5%;
  }

  .title-left,
  .title-center,
  .title-right {
    font-size: 2.5rem;
  }

  .contact-section {
    padding: 60px 5%;
  }

  .contact-header h2 {
    font-size: 3rem;
  }

  .contact-content {
    gap: 40px;
  }

  .other-skills-container {
    padding: 60px 5%;
    gap: 30px;
  }
}

@media (max-width: 768px) {
  .title-left,
  .title-center,
  .title-right {
    font-size: 2rem;
  }

  .works-header {
    margin-bottom: 40px;
  }

  .large .project-box {
    min-height: 300px;
  }

  .stacked-column .project-box {
    min-height: 200px;
  }

  .contact-header h2 {
    font-size: 2.5rem;
  }

  .contact-content {
    flex-direction: column;
    gap: 60px;
  }

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

  .submit-btn,
  .email-action-btn {
    width: 100%;
    text-align: center;
  }

  .bio-container {
    padding: 40px 5% 80px 5%;
  }

  .bio-container p {
    font-size: 18px;
  }

  .tech-item {
    gap: 10px;
    padding: 0 24px;
  }

  .tech-item img {
    width: 36px;
    height: 36px;
  }

  .tech-item span {
    font-size: 1.1rem;
  }

  .other-skills-container {
    padding: 40px 5%;
    gap: 24px;
  }

  .skills-column li {
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 8vh 5% 6vh 5%;
    gap: 30px;
  }

  .intro h1 {
    font-size: 22px;
  }

  .title-left,
  .title-center,
  .title-right {
    font-size: 1.5rem;
  }

  .contact-header {
    margin-bottom: 40px;
  }

  .contact-header h2 {
    font-size: 2rem;
  }

  .contact-section {
    padding: 40px 5%;
  }

  .works-section {
    padding: 40px 5%;
  }

  .bio-container p {
    font-size: 16px;
  }

  .brand-name {
    font-size: 36px;
  }
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--text);
  z-index: 1001;
  width: 0%;
  transform-origin: left;
  will-change: width;
}

.messages {
  position: fixed;
  top: 100px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 999;
  pointer-events: none;
}

.message {
  padding: 14px 32px;
  border-radius: 999px;
  background-color: var(--nav-bg);
  border: 1px solid var(--border);
  color: var(--text);
  font-weight: 600;
  font-size: 14px;
  text-align: center;
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  pointer-events: auto;
}

/* --- Certification Section --- */
.cert-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px 40px;
}

.cert-section .marquee-container {
  margin-left: calc(-50vw + 50%);
  margin-right: calc(-50vw + 50%);
  width: 100vw;
}

.cert-header {
  margin-bottom: 80px;
}

.cert-header h2 {
  font-size: 4.5rem;
  font-weight: 400;
  text-transform: uppercase;
  line-height: 1.1;
  letter-spacing: 1px;
  color: var(--text);
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 32px;
}

.cert-card {
  display: flex;
  flex-direction: column;
  background-color: var(--muted-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  text-decoration: none;
  color: inherit;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  height: 100%;
}

.cert-card:hover {
  transform: translateY(-8px) scale(1.01);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.12);
  border-color: var(--text);
}

.cert-card:active {
  transform: translateY(-2px) scale(0.99);
}

.cert-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--muted-text);
  margin-bottom: 24px;
}

.cert-title {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
  color: var(--text);
}

.cert-desc {
  font-size: 15px;
  line-height: 1.6;
  color: var(--bio-text);
  margin-bottom: 32px;
  flex-grow: 1;
}

.cert-action {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: opacity 0.2s ease;
}

.cert-card:hover .cert-action {
  opacity: 0.6;
}

@media (max-width: 900px) {
  .cert-header h2 {
    font-size: 3rem;
  }

  .cert-header .align-right {
    text-align: left;
  }
}

@media (max-width: 600px) {
  .cert-section {
    padding: 60px 20px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .coming-soon-text {
    animation: none;
  }
}