/* --- CSS Variables & Design System --- */
:root {
  /* Fonts */
  --font-display: "Crimson Text", Georgia, serif;
  --font-body: "Work Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Colors — Default Light Mode */
  --bg: #fcfaf7;
  --bg-elevated: #ffffff;
  --text: #292524;
  --text-muted: #6b6560;
  --border: #e7e2dc;
  --accent: #c2410c; /* Terracotta */
  --accent-hover: #9a3412;
  --accent-light: #fef3c7; /* Warm soft badge bg */
  --accent-light-text: #9a3412;
  --accent-contrast: #ffffff;
  --nav-bg: rgba(252, 250, 247, 0.6);
  --shadow: 0 4px 20px rgba(41, 37, 36, 0.04);
  --shadow-hover: 0 12px 30px rgba(194, 65, 12, 0.08);

  /* Spacing */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6.5rem;

  /* Typography Scale */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.5rem;
  --text-2xl: 2.25rem;
  --text-3xl: clamp(2.5rem, 6vw, 4.5rem);

  /* Animation & Borders */
  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 16px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --transition: all 0.35s var(--ease);
}

/* Manual Theme Overrides */
:root[data-theme="light"] {
  --bg: #fcfaf7;
  --bg-elevated: #ffffff;
  --text: #292524;
  --text-muted: #6b6560;
  --border: #e7e2dc;
  --accent: #c2410c;
  --accent-hover: #9a3412;
  --accent-light: #fef3c7;
  --accent-light-text: #9a3412;
  --accent-contrast: #ffffff;
  --nav-bg: rgba(252, 250, 247, 0.6);
  --shadow: 0 4px 20px rgba(41, 37, 36, 0.04);
  --shadow-hover: 0 12px 30px rgba(194, 65, 12, 0.08);
}

:root[data-theme="dark"] {
  --bg: #09090b; /* Deep obsidian black */
  --bg-elevated: #111114;
  --text: #f5f5f4;
  --text-muted: #a1a1aa;
  --border: #27272a;
  --accent: #b18d59; /* Gold / Champagne */
  --accent-hover: #c9a56d;
  --accent-light: #2b2418;
  --accent-light-text: #e8d4b0;
  --accent-contrast: #09090b;
  --nav-bg: rgba(9, 9, 11, 0.6);
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.45);
  --shadow-hover: 0 12px 30px rgba(177, 141, 89, 0.22);
}

/* --- Base & Reset --- */
::selection {
  background-color: var(--accent);
  color: var(--accent-contrast);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  font-size: var(--text-base);
  transition: background-color 0.5s var(--ease), color 0.5s var(--ease);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Layout --- */
.nav-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: var(--nav-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-lg);
  color: var(--accent);
  text-decoration: none;
  letter-spacing: -0.05em;
  transition: var(--transition);
}

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

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  width: 100%;
  transform: scaleX(0);
  height: 1px;
  bottom: -4px;
  left: 0;
  background-color: var(--accent);
  transform-origin: bottom right;
  transition: transform 0.25s ease-out;
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
  transform-origin: bottom left;
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.5rem;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

:root[data-theme="dark"] .sun-icon { display: block; }
:root[data-theme="dark"] .moon-icon { display: none; }
:root:not([data-theme="dark"]) .sun-icon { display: none; }
:root:not([data-theme="dark"]) .moon-icon { display: block; }

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 1.5rem 4rem 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}

.hero-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 3rem;
  width: 100%;
}

.hero-content {
  flex: 1;
}

.hero-avatar {
  flex-shrink: 0;
  width: 300px;
  height: 300px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--accent);
  background-color: var(--accent);
  padding: 0.5rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.hero-avatar:hover {
  transform: translateY(-4px) rotate(1deg);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.profile-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: calc(var(--radius-lg) - 0.5rem);
  filter: sepia(12%) contrast(102%) brightness(98%);
  transition: var(--transition);
}

.hero-avatar:hover .profile-img {
  filter: none;
}

.hero-eyebrow {
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 1rem;
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 7.5vw, 5.25rem);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.03em;
  margin-bottom: 1.75rem;
}

.hero-tagline {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  color: var(--text-muted);
  font-style: normal;
  font-weight: 400;
  line-height: 1.6;
  max-width: 46ch;
  margin-bottom: 2.75rem;
  padding-left: 0;
  border-left: none;
}

.hero-socials {
  display: flex;
  gap: 1.25rem;
  margin-bottom: 0;
}

.social-link-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background-color: var(--bg-elevated);
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.social-link-icon-btn i {
  font-size: 1.1rem;
}

.social-link-icon-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(194, 65, 12, 0.08);
}

.hero-interactive-block {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  width: fit-content;
}

.hero-actions {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-bottom: 2.25rem;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 2rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
  border-radius: var(--radius);
  transition: var(--transition);
  cursor: pointer;
}

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

.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-2px);
}

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

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* --- Sections --- */
.main-content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding-block: var(--space-5);
  border-bottom: 1px solid var(--border);
}

.section:last-of-type {
  border-bottom: none;
}

.section-label {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  margin-bottom: 2.5rem;
  position: relative;
  display: inline-block;
}

.section-label::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 40px;
  height: 2px;
  background-color: var(--accent);
}

/* About Section */
.about-container {
  max-width: 1000px;
  width: 100%;
}

.about-body {
  font-size: var(--text-lg);
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

/* Skills Section */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2.5rem;
}

.skill-group h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  margin-bottom: 1.25rem;
  color: var(--accent);
  font-weight: 700;
}

.skill-list {
  list-style: none;
}

.skill-list li {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  padding-left: 1.25rem;
  position: relative;
}

.skill-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: bold;
}

/* Projects Section */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
}

@media (min-width: 900px) {
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.project-card {
  background-color: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: var(--shadow-hover);
}

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

.project-category {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent);
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 0.5rem;
}

.project-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
}

.project-desc {
  font-size: var(--text-sm);
  color: var(--text);
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.project-details {
  list-style: none;
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.project-details li {
  margin-bottom: 0.5rem;
  position: relative;
  padding-left: 1rem;
}

.project-details li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin-top: auto;
  margin-bottom: 1.5rem;
}

.tag-list li {
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  background-color: var(--accent-light);
  color: var(--accent-light-text);
  border-radius: var(--radius-sm);
}

.project-links {
  display: flex;
  gap: 1rem;
}

.link-repo {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  border-bottom: 2px solid var(--accent);
  transition: var(--transition);
}

.link-repo:hover {
  color: var(--accent);
  border-bottom-color: var(--accent-hover);
}

/* Education Section */
.education-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.edu-card {
  display: flex;
  gap: 1.5rem;
  padding: 2rem;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.edu-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(194, 65, 12, 0.05);
}

.edu-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background-color: var(--bg);
  border: 1px solid var(--border);
  color: var(--accent);
  flex-shrink: 0;
  transition: var(--transition);
}

.edu-card:hover .edu-card-icon {
  background-color: var(--accent-light);
  border-color: var(--accent);
}

.edu-card-content {
  flex-grow: 1;
}

.edu-card-header {
  margin-bottom: 0.75rem;
}

.edu-date {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.edu-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 800;
  margin-bottom: 0.25rem;
  color: var(--text);
}

.edu-institution {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text-muted);
}

.edu-desc {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.6;
}

@media (max-width: 600px) {
  .edu-card {
    flex-direction: column;
    gap: 1rem;
    padding: 1.5rem;
  }
}

/* Certifications Section */
.certifications-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.cert-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.cert-item:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(194, 65, 12, 0.05);
}

.cert-info {
  display: flex;
  flex-direction: column;
}

.cert-item h4 {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: 0.25rem;
  color: var(--text);
  transition: var(--transition);
}

.cert-item:hover h4 {
  color: var(--accent);
}

.cert-provider {
  font-size: var(--text-xs);
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: var(--transition);
}

.cert-item:hover .cert-provider {
  color: var(--accent-hover);
}

.cert-link-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  opacity: 0.5;
  transition: var(--transition);
}

.cert-item:hover .cert-link-icon {
  color: var(--accent);
  opacity: 1;
  transform: translate(2px, -2px);
}

/* Contact Section */
.contact-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

@media (min-width: 900px) {
  .contact-split {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4rem;
    align-items: start;
  }
}

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

.contact-lead {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 1.25rem;
}

.contact-sub {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 2.5rem;
}

.status-indicators {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.status-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: var(--text-xs);
  color: var(--text);
  font-weight: 600;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  position: relative;
  flex-shrink: 0;
}

.status-dot::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 50%;
  animation: pulse 2.5s infinite;
}

.status-dot.green { background-color: #10b981; }
.status-dot.green::after { background-color: #10b981; }
.status-dot.blue { background-color: #3b82f6; }
.status-dot.blue::after { background-color: #3b82f6; }

@keyframes pulse {
  0% { transform: scale(1); opacity: 0.8; }
  70% { transform: scale(2.5); opacity: 0; }
  100% { transform: scale(2.5); opacity: 0; }
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact-method-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.25rem;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.contact-method-card:hover {
  border-color: var(--accent);
  transform: translateX(4px);
  box-shadow: 0 4px 20px rgba(194, 65, 12, 0.05);
}

.method-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background-color: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: var(--transition);
}

.contact-method-card:hover .method-icon {
  color: var(--accent);
  border-color: var(--accent);
  background-color: var(--accent-light);
}

.method-details {
  display: flex;
  flex-direction: column;
}

.method-name {
  font-size: var(--text-xs);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  margin-bottom: 0.15rem;
}

.method-value {
  font-size: var(--text-sm);
  color: var(--text);
  font-weight: 700;
  transition: var(--transition);
}

.contact-method-card:hover .method-value {
  color: var(--accent);
}

.contact-social-buttons {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  box-shadow: var(--shadow);
  flex: 1;
  min-width: 100px;
  justify-content: center;
}

.contact-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(194, 65, 12, 0.05);
}

.contact-btn svg {
  color: var(--text-muted);
  transition: var(--transition);
}

.contact-btn:hover svg {
  color: var(--accent);
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 1.5rem;
  background-color: var(--bg-elevated);
}

.footer-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer p {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.back-to-top {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: var(--transition);
}

.back-to-top:hover {
  color: var(--accent-hover);
  transform: translateY(-2px);
}

/* --- Scroll Reveal Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hero {
    padding-top: 7rem;
    padding-bottom: 2rem;
    min-height: auto;
  }

  .hero-inner {
    flex-direction: column-reverse;
    text-align: center;
    gap: 2rem;
  }

  .hero-avatar {
    width: 220px;
    height: 220px;
  }

  .hero-interactive-block {
    margin: 0 auto;
    align-items: center;
  }

  .hero-actions,
  .hero-socials {
    justify-content: center;
  }

  .section {
    padding-block: var(--space-4);
  }
}