/* -- CSS Custom Properties -- */
:root {
  /* Brand colours */
  --accent: #ff8f00;
  --accent-light: #ffb74d;
  --accent-dark: #e65100;
  --accent-glow: rgba(255, 143, 0, 0.35);

  /* Dark palette (default) */
  --bg-deep: #0a0a0f;
  --bg-primary: #0f1117;
  --bg-surface: #161922;
  --bg-elevated: #1c2030;
  --bg-card: rgba(22, 25, 34, 0.85);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 143, 0, 0.5);

  --text-primary: #f0f2f5;
  --text-secondary: #9ca3b0;
  --text-muted: #636b7d;

  --nav-bg: rgb(15, 17, 23);
  --glass-border: rgba(255, 255, 255, 0.1);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 50px rgba(0, 0, 0, 0.5);
  --shadow-accent: 0 8px 30px rgba(255, 143, 0, 0.2);

  /* Layout */
  --max-w: 1200px;
  --section-py: clamp(4rem, 8vw, 7rem);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-pill: 100px;

  /* Typography */
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", "Fira Code", "Roboto Mono", monospace;

  color-scheme: dark;
}

/* -- Light theme overrides -- */
[data-theme="light"] {
  --bg-deep: #f8f9fc;
  --bg-primary: #ffffff;
  --bg-surface: #f0f2f5;
  --bg-elevated: #e8eaef;
  --bg-card: rgba(255, 255, 255, 0.9);
  --border: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(255, 143, 0, 0.6);

  --text-primary: #1a1d26;
  --text-secondary: #5a6175;
  --text-muted: #8891a4;

  --nav-bg: rgb(255, 255, 255);
  --glass-border: rgba(0, 0, 0, 0.08);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 50px rgba(0, 0, 0, 0.1);
  --shadow-accent: 0 8px 30px rgba(255, 143, 0, 0.15);

  color-scheme: light;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  display: block;
}

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

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

/* -- Utility -- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2rem);
}

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

.section {
  padding: var(--section-py) 0;
  position: relative;
}

/* -- Section Headers -- */
.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.section-title-left {
  text-align: left;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  max-width: 55ch;
  margin: 0 auto;
  line-height: 1.8;
}

.section-subtitle-left {
  text-align: left;
  margin: 0;
}

/* -- Buttons -- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border: none;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #1a1000;
  box-shadow: var(--shadow-accent);
}

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-3px);
  box-shadow: 0 12px 35px rgba(255, 143, 0, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
  backdrop-filter: blur(6px);
}

.btn-outline:hover {
  border-color: var(--accent);
  background: rgba(255, 143, 0, 0.08);
  transform: translateY(-3px);
}

.btn-sm {
  padding: 0.55rem 1.2rem;
  font-size: 0.82rem;
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.25s ease;
  font-size: 1.1rem;
}

.icon-btn:hover {
  background: rgba(255, 143, 0, 0.12);
  color: var(--accent);
}

/* -- Starfield Canvas -- */
#starfield {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

[data-theme="light"] #starfield {
  opacity: 0.12;
}

/* Soft atmospheric haze layered above the moving stars. */
.star-dust {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.star-dust::before,
.star-dust::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 143, 0, 0.09);
  filter: blur(72px);
}

.star-dust::before {
  right: 5%;
  bottom: -240px;
  left: 5%;
  height: 430px;
}

.star-dust::after {
  top: 18%;
  right: -12vw;
  width: clamp(260px, 36vw, 560px);
  height: clamp(220px, 30vw, 460px);
  opacity: 0.38;
  filter: blur(88px);
}

[data-theme="light"] .star-dust {
  opacity: 0.35;
}

/* -- HEADER / NAV -- */
.site-header {
  position: fixed;
  top: 1rem;
  left: 50%;
  width: min(95%, var(--max-w));
  z-index: 100;
  transform: translateX(-50%);
  animation: slideDown 0.7s cubic-bezier(0.23, 1, 0.32, 1) forwards;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

.header-inner {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
}

.header-island {
  min-height: 58px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  background: var(--nav-bg);
  box-shadow: 0 18px 45px -24px rgba(0, 0, 0, 0.68);
  backdrop-filter: blur(18px) saturate(170%);
  -webkit-backdrop-filter: blur(18px) saturate(170%);
  transition: border-color 180ms ease, box-shadow 220ms ease, background-color 180ms ease;
}

.site-header.scrolled .header-island {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.brand-island {
  display: flex;
  align-items: center;
  padding: 0.4rem 0.7rem;
}

.nav-logo {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--text-primary);
  white-space: nowrap;
}

.nav-logo-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border: 1px solid rgba(255, 143, 0, 0.5);
  border-radius: 10px;
  background: rgba(255, 143, 0, 0.11);
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.nav-logo-copy,
.nav-logo-name,
.nav-logo-role {
  display: block;
}

.nav-logo-name {
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.15;
  transition: color 160ms ease;
}

.nav-logo-role {
  margin-top: 0.2rem;
  color: var(--text-secondary);
  font-size: 0.62rem;
  font-weight: 600;
  line-height: 1;
}

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

.nav-island {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.4rem;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.15rem;
}

.nav-link {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
  transition: color 160ms ease, background-color 160ms ease, transform 140ms ease;
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(255, 143, 0, 0.07);
}

.nav-link.active {
  color: #1a1000;
  background: var(--accent);
  box-shadow: 0 8px 18px -14px rgba(255, 143, 0, 0.8);
}

.nav-link:active {
  transform: scale(0.97);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  padding: 0.4rem;
}

.nav-actions .icon-btn {
  width: 44px;
  height: 44px;
}

/* Theme and menu icon visibility */
[data-theme="dark"] .theme-icon-dark { display: none; }
[data-theme="dark"] .theme-icon-light { display: block; }
[data-theme="light"] .theme-icon-light { display: none; }
[data-theme="light"] .theme-icon-dark { display: block; }

.menu-icon-close,
.mobile-only {
  display: none;
}

#mobile-menu-toggle[aria-expanded="true"] .menu-icon-open {
  display: none;
}

#mobile-menu-toggle[aria-expanded="true"] .menu-icon-close {
  display: block;
}

@media (max-width: 1020px) {
  .nav-logo-role {
    display: none;
  }

  .nav-link {
    padding-inline: 0.6rem;
  }
}

/* Mobile nav */
@media (max-width: 900px) {
  .site-header {
    top: 0.75rem;
    width: calc(100% - 1.5rem);
  }

  .header-inner {
    grid-template-columns: auto auto;
    justify-content: space-between;
    gap: 0.5rem;
  }

  .nav-island {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    left: 0;
    min-height: 0;
    display: block;
    padding: 0;
    border: 0;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    pointer-events: none;
  }

  .nav-links {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.25rem;
    width: 100%;
    padding: 0.65rem;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    background: var(--nav-bg);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(18px) saturate(170%);
    -webkit-backdrop-filter: blur(18px) saturate(170%);
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px) scale(0.985);
    transform-origin: top center;
    transition: opacity 160ms cubic-bezier(0.23, 1, 0.32, 1), transform 180ms cubic-bezier(0.23, 1, 0.32, 1), visibility 180ms step-end;
  }

  .nav-links.open {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0) scale(1);
    transition: opacity 160ms cubic-bezier(0.23, 1, 0.32, 1), transform 180ms cubic-bezier(0.23, 1, 0.32, 1), visibility 0ms step-start;
  }

  .nav-link {
    width: 100%;
    padding: 0.7rem 0.8rem;
    font-size: 0.85rem;
  }

  .mobile-only {
    display: flex;
  }
}

@media (max-width: 480px) {
  .brand-island,
  .nav-actions {
    padding: 0.35rem;
  }

  .nav-logo-copy {
    display: none;
  }

  .nav-logo-mark {
    width: 36px;
    height: 36px;
  }
}

/* -- HERO -- */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6rem 2rem 4rem;
  z-index: 1;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: var(--bg-card);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  backdrop-filter: blur(8px);
  animation: fadeUp 0.8s 0.2s both;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s ease-in-out infinite;
  box-shadow: 0 0 12px 3px var(--accent-glow);
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.3); }
}

.hero-title {
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 0.75rem;
  animation: fadeUp 0.8s 0.35s both;
}

.hero-roles {
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-bottom: 1.5rem;
  animation: fadeUp 0.8s 0.5s both;
}

.hero-role {
  font-size: clamp(1.2rem, 3.5vw, 1.8rem);
  font-weight: 600;
  color: var(--accent);
  transition: opacity 0.45s ease, transform 0.45s ease;
}

.hero-desc {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 2rem;
  line-height: 1.85;
  animation: fadeUp 0.8s 0.65s both;
}

.hero-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
  animation: fadeUp 0.8s 0.8s both;
}

.hero-socials {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  animation: fadeUp 0.8s 0.95s both;
}

.hero-socials a {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 1.1rem;
  transition: all 0.3s ease;
}

.hero-socials a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(255, 143, 0, 0.1);
  transform: translateY(-4px);
  box-shadow: var(--shadow-accent);
}

.hero-gradient-fade {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(to top, var(--bg-deep) 0%, transparent 100%);
  z-index: 1;
  pointer-events: none;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* -- ABOUT -- */
.about-section {
  background: var(--bg-primary);
  z-index: 1;
  position: relative;
}

.about-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.about-avatar-wrapper {
  float: left;
  margin: 0 1.5rem 1rem 0;
  shape-outside: circle(50%);
}

.about-avatar {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  border: 4px solid var(--accent);
  box-shadow: 0 8px 30px var(--accent-glow);
  object-fit: cover;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1.2rem;
  font-size: 0.98rem;
  line-height: 1.85;
}

.about-text strong {
  color: var(--text-primary);
}

.about-info-cards {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.info-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  backdrop-filter: blur(8px);
  transition: all 0.3s ease;
}

.info-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-accent);
  transform: translateY(-3px);
}

.info-icon {
  font-size: 1.4rem;
  color: var(--accent);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 143, 0, 0.1);
  flex-shrink: 0;
}

.info-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 0.15rem;
}

.info-value {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

@media (max-width: 768px) {
  .about-layout {
    grid-template-columns: 1fr;
  }
}

/* -- EXPERIENCE (TIMELINE) -- */
.experience-section {
  background: var(--bg-surface);
  z-index: 1;
  position: relative;
}

.timeline {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
  padding-left: 2.5rem;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0.75rem;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--border));
}

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
}

.timeline-marker {
  position: absolute;
  left: -2rem;
  top: 1.5rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg-surface);
  box-shadow: 0 0 0 3px var(--accent-glow);
  z-index: 2;
}

.timeline-card {
  padding: 1.5rem 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
  transition: all 0.3s ease;
}

.timeline-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-accent);
  transform: translateX(6px);
}

.timeline-period {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  font-family: var(--mono);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.timeline-role {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.timeline-company {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}

.company-alias {
  font-size: 0.85em;
  font-weight: 400;
  color: var(--text-muted);
}

.timeline-location {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.timeline-detail {
  margin-top: 0.5rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
  font-style: italic;
}

/* -- PROJECTS -- */
.projects-section {
  background: var(--bg-primary);
  z-index: 1;
  position: relative;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.project-featured {
  grid-column: span 2;
}

.project-card {
  display: flex;
  flex-direction: column;
  padding: 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
  transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.project-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-accent);
  transform: translateY(-6px);
}

.project-head {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.project-num {
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
}

.project-icon-wrap {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid rgba(255, 143, 0, 0.4);
  color: var(--accent);
  font-size: 1.15rem;
}

.project-body {
  flex: 1;
}

.project-meta {
  display: block;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.5rem;
}

.project-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

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

.project-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 0.85rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  padding: 0.3rem 0.7rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.project-actions {
  margin-top: 1rem;
  display: flex;
  gap: 0.75rem;
}

/* Archive */
.project-archive {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  max-width: var(--max-w);
  margin: 2.5rem auto 0;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.archive-label {
  display: block;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.3rem;
}

.project-archive h3 {
  font-size: 1.1rem;
  font-weight: 600;
}

.archive-items {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.archive-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.archive-item i {
  color: var(--accent);
}

@media (max-width: 768px) {
  .projects-grid {
    grid-template-columns: 1fr;
  }

  .project-featured {
    grid-column: auto;
  }

  .project-archive {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* -- SKILLS (TABS) -- */
.skills-section {
  background: var(--bg-surface);
  z-index: 1;
  position: relative;
}

.skills-tabs {
  max-width: 850px;
  margin: 0 auto;
}

.tabs-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
  padding: 0.35rem;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
}

.tab-btn {
  padding: 0.6rem 1.2rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.25s ease;
  font-family: var(--font);
}

.tab-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 143, 0, 0.06);
}

.tab-btn.active {
  background: var(--accent);
  color: #1a1000;
  box-shadow: var(--shadow-sm);
}

.tab-panel {
  display: none;
  animation: fadeIn 0.35s ease;
}

.tab-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.skills-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.skill-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.65rem 1.2rem;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: all 0.3s ease;
  cursor: default;
}

.skill-chip:hover {
  border-color: var(--accent);
  background: rgba(255, 143, 0, 0.08);
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}

.skill-chip img {
  width: 22px;
  height: 22px;
  object-fit: contain;
}

/* -- CREDENTIALS -- */
.credentials-section {
  background: var(--bg-primary);
  z-index: 1;
  position: relative;
}

.credentials-layout {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 4rem;
  margin-bottom: 3rem;
}

.credentials-intro {
  display: flex;
  flex-direction: column;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-top: 1.5rem;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 700;
  transition: gap 0.25s ease, color 0.25s ease;
}

.text-link:hover {
  gap: 0.85rem;
  color: var(--accent-light);
}

.credentials-list {
  border-top: 1px solid var(--border);
}

.credential-row {
  display: grid;
  grid-template-columns: 4rem 1fr 1.2rem;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
  text-decoration: none;
  transition: background 0.2s ease;
}

a.credential-row:hover {
  background: rgba(255, 143, 0, 0.04);
}

.credential-year {
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
}

.credential-info strong,
.credential-info small {
  display: block;
}

.credential-info strong {
  font-size: 0.95rem;
  font-weight: 600;
}

.credential-info small {
  margin-top: 0.15rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.credential-row > i {
  color: var(--accent);
  font-size: 0.82rem;
}

/* Education row */
.education-row {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}

.education-mark,
.awards-mark {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid rgba(255, 143, 0, 0.5);
  color: var(--accent);
  font-size: 1.3rem;
  flex-shrink: 0;
}

.education-entries {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.education-entry strong {
  display: block;
  font-size: 1rem;
  font-weight: 700;
}

.education-entry span {
  display: block;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

/* Awards */
.awards-row {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}

.section-label-sm {
  display: block;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.75rem;
}

.awards-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.award-chip {
  padding: 0.4rem 0.85rem;
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

@media (max-width: 768px) {
  .credentials-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* -- CONTACT -- */
.contact-section {
  background: var(--bg-surface);
  z-index: 1;
  position: relative;
}

.contact-layout {
  max-width: 760px;
  margin: 0 auto;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding: clamp(1.25rem, 4vw, 2rem);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  color: var(--text-primary);
  font-size: 0.84rem;
  font-weight: 650;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  outline: none;
  background: var(--bg-deep);
  color: var(--text-primary);
  caret-color: var(--accent);
  font-family: var(--font);
  font-size: 0.92rem;
  line-height: 1.5;
  transition: border-color 160ms ease, box-shadow 180ms ease, background-color 160ms ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-secondary);
  opacity: 0.72;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

.contact-submit {
  width: 100%;
  min-height: 48px;
}

.form-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  margin-top: -0.45rem;
  color: var(--text-secondary);
  font-size: 0.78rem;
  text-align: center;
}

.form-note i {
  color: var(--accent);
  font-size: 0.7rem;
}

@media (max-width: 600px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

/* -- FOOTER -- */
.site-footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border);
  padding: 3.5rem 0 0;
  position: relative;
  z-index: 1;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 3rem;
}

.footer-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  display: block;
  margin-bottom: 0.6rem;
}

.footer-about p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

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

.footer-links-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.footer-links-col a {
  display: block;
  font-size: 0.88rem;
  color: var(--text-secondary);
  padding: 0.3rem 0;
  transition: color 0.2s ease;
}

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

.footer-socials {
  display: flex;
  gap: 0.75rem;
}

.footer-socials a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 1rem;
  transition: all 0.3s ease;
}

.footer-socials a:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-accent);
}

.footer-bottom {
  margin-top: 2.5rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-bottom p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* -- SCROLL-TO-TOP -- */
.scroll-top-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent);
  color: #1a1000;
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-accent);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: all 0.35s ease;
  z-index: 50;
}

.scroll-top-btn.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.scroll-top-btn:hover {
  background: var(--accent-light);
  transform: translateY(-4px);
}

/* -- SCROLL REVEAL ANIMATIONS -- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

/* -- REDUCED MOTION -- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}