/* ═══════════════════════════════════════════════════════════
   ANTONY WAHOME — Personal Portfolio
   Dark theme: Deep grey · Cyan #06b6d4 · Coffee Brown #c4973e
   ═══════════════════════════════════════════════════════════ */

/* ── 1. CSS Custom Properties ── */
:root {
  /* Backgrounds */
  --bg-primary: #0a0a0f;
  --bg-secondary: #0f0f18;
  --bg-card: #161622;
  --bg-card-hover: #1c1c2e;

  /* Accent colours */
  --cyan: #06b6d4;
  --cyan-light: #22d3ee;
  --cyan-dim: rgba(6, 182, 212, 0.12);
  --cyan-glow: rgba(6, 182, 212, 0.25);
  --cyan-border: rgba(6, 182, 212, 0.35);

  --brown: #c4973e;
  --brown-light: #deb86a;
  --brown-dim: rgba(196, 151, 62, 0.12);
  --brown-border: rgba(196, 151, 62, 0.35);

  /* Text */
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Borders */
  --border: rgba(255, 255, 255, 0.07);
  --border-hover: rgba(255, 255, 255, 0.14);

  /* Gradients */
  --grad-name: linear-gradient(135deg, var(--cyan) 0%, var(--brown) 100%);
  --grad-card: linear-gradient(
    135deg,
    rgba(6, 182, 212, 0.05) 0%,
    rgba(196, 151, 62, 0.05) 100%
  );

  /* Sizing */
  --nav-height: 70px;
  --section-pad: 5rem 8%;

  /* Typography */
  --font-main: "Space Grotesk", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Courier New", monospace;

  /* Transitions */
  --transition: 0.3s ease;
}

/* ── 2. Reset ── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

ul {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

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

button {
  font-family: var(--font-main);
  cursor: pointer;
}

/* ── 3. Canvas Starfield ── */
#starfield {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ── 4. Navigation ── */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 8%;
  background: rgba(10, 10, 15, 0.75);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition:
    background var(--transition),
    box-shadow var(--transition);
}

#navbar.scrolled {
  background: rgba(10, 10, 15, 0.95);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-primary);
  transition: font-size var(--transition);
}

.logo-dot {
  color: var(--cyan);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding-bottom: 4px;
  transition: color var(--transition);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--cyan);
  transition: width var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--cyan);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: none;
  border: none;
  padding: 0;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition:
    transform 0.35s ease,
    opacity 0.35s ease;
}

.hamburger.open span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}
.hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.hamburger.open span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* ── 5. Mobile Menu ── */
.mobile-menu {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: rgba(10, 10, 15, 0.97);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 999;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.mobile-menu.open {
  max-height: 400px;
}

.mobile-menu ul {
  padding: 1rem 0;
}

.mobile-link {
  display: block;
  padding: 1rem 8%;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-left: 3px solid transparent;
  transition: all var(--transition);
}

.mobile-link:hover {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: var(--cyan-dim);
}

/* ── 6. Section Base ── */
section {
  position: relative;
  z-index: 1;
  padding: var(--section-pad);
  min-height: fit-content;
}

.section-alt {
  background: rgba(15, 15, 24, 0.6);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}

.section-container {
  max-width: 1100px;
  margin: 0 auto;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
  display: block;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 50px;
  height: 3px;
  background: var(--grad-name);
  border-radius: 2px;
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.65s ease,
    transform 0.65s ease;
  transition-delay: var(--delay, 0s);
}

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

/* ── 7. Hero Section ── */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: calc(var(--nav-height) + 2rem) 8% 4rem;
  z-index: 1;
}

.hero-content {
  max-width: 760px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

/* Profile picture */
.hero-pic-wrapper {
  position: relative;
  width: 160px;
  height: 160px;
  margin-bottom: 2rem;
}

.hero-pic {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  position: relative;
  z-index: 2;
  border: 3px solid var(--cyan);
  box-shadow:
    0 0 30px var(--cyan-glow),
    0 0 60px rgba(6, 182, 212, 0.1);
}

.hero-pic-ring {
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 2px solid var(--cyan-border);
  animation: ring-pulse 3s ease-in-out infinite;
  z-index: 1;
}

@keyframes ring-pulse {
  0%,
  100% {
    opacity: 0.4;
    transform: scale(1);
  }
  50% {
    opacity: 0.9;
    transform: scale(1.05);
  }
}

.hero-greeting {
  font-size: 1rem;
  font-weight: 500;
  color: var(--cyan);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
}

.hero-name {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1rem;
  background: var(--grad-name);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title-wrapper {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  min-height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.2rem;
}

.hero-typed {
  color: var(--brown-light);
  font-weight: 600;
}

.hero-cursor {
  color: var(--cyan);
  animation: blink 1s step-end infinite;
  font-weight: 300;
}

@keyframes blink {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
}

.hero-tagline {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 2rem;
  line-height: 1.8;
}

/* CTA Buttons */
.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.8rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-main);
  transition: all var(--transition);
  cursor: pointer;
  text-decoration: none;
}

.btn-primary {
  background: var(--cyan);
  color: #0a0a0f;
  border: 2px solid var(--cyan);
}

.btn-primary:hover {
  background: var(--cyan-light);
  border-color: var(--cyan-light);
  box-shadow: 0 0 20px var(--cyan-glow);
  color: #0a0a0f;
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-hover);
}

.btn-outline:hover {
  border-color: var(--brown);
  color: var(--brown-light);
  box-shadow: 0 0 16px var(--brown-dim);
}

/* Social icons */
.hero-socials {
  display: flex;
  gap: 1.4rem;
  font-size: 1.4rem;
}

.hero-socials a {
  color: var(--text-muted);
  transition:
    color var(--transition),
    transform var(--transition);
}

.hero-socials a:hover {
  color: var(--cyan);
  transform: translateY(-3px);
}

/* Scroll hint */
.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
}

.hero-scroll-hint span {
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  animation: scroll-dot 1.5s infinite;
}

.hero-scroll-hint span:nth-child(2) {
  animation-delay: 0.2s;
}
.hero-scroll-hint span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes scroll-dot {
  0%,
  100% {
    opacity: 0.2;
    transform: scale(0.8);
  }
  50% {
    opacity: 1;
    transform: scale(1.2);
  }
}

/* ── 8. About Section ── */
.about-grid {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 4rem;
  align-items: start;
}

.about-pic-wrapper {
  position: relative;
}

.about-pic {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 12px;
  object-fit: cover;
  border: 2px solid var(--border);
  box-shadow: 0 0 40px rgba(6, 182, 212, 0.1);
  transition: box-shadow var(--transition);
}

.about-pic:hover {
  box-shadow: 0 0 60px rgba(6, 182, 212, 0.2);
}

.about-bio {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 1.2rem;
  line-height: 1.85;
}

.skills-heading {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--brown);
  font-family: var(--font-mono);
  margin-bottom: 1rem;
  margin-top: 1.5rem;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(35px, 1fr));
  gap: 0.6rem;
  justify-items: center;
}

.skill-logo-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 5px;
  border-radius: 12px;
  background: var(--black);
  border: 1px solid var(--black-border);
  transition: all var(--transition);
  width: 50px;
  height: 50px;
}

.skill-logo-wrapper:hover {
  background: rgba(196, 151, 62, 0.22);
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(196, 151, 62, 0.25);
}

.skill-logo {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: brightness(0.95);
  transition: filter var(--transition);
}

.skill-logo-wrapper:hover .skill-logo {
  filter: brightness(1.1);
}

/* ── 9. Experience Section ── */
.exp-layout {
  display: flex;
  gap: 3rem;
  align-items: flex-start;
}

.exp-tabs {
  display: flex;
  flex-direction: column;
  min-width: 190px;
  border-left: 2px solid var(--border);
}

.exp-tab {
  background: none;
  border: none;
  border-left: 2px solid transparent;
  margin-left: -2px;
  padding: 0.85rem 1.2rem;
  text-align: left;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-main);
}

.exp-tab:hover {
  color: var(--text-primary);
  background: var(--cyan-dim);
}

.exp-tab.active {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: var(--cyan-dim);
}

.exp-content {
  flex: 1;
  min-height: 260px;
}

.exp-item {
  display: none;
  animation: fadeSlide 0.4s ease;
}

.exp-item.active {
  display: block;
}

@keyframes fadeSlide {
  from {
    opacity: 0;
    transform: translateX(-12px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.exp-role {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.exp-at {
  color: var(--cyan);
  font-weight: 400;
}

.exp-meta {
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.exp-bullets {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.exp-bullets li {
  position: relative;
  padding-left: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.exp-bullets li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--cyan);
  font-size: 0.9rem;
}

.exp-logo-wrap {
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
}

.exp-logo {
  width: 56px;
  height: 56px;
  object-fit: contain;
  padding: 0.5rem;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.02);
  transition: all var(--transition);
}

/* ── 10. Education Section ── */
.edu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.edu-card {
  display: flex;
  gap: 1.2rem;
  padding: 1.8rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-top: 3px solid var(--brown);
  border-radius: 10px;
  transition: all var(--transition);
}

.edu-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--brown-border);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.edu-icon-wrap {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--brown-dim);
  border-radius: 8px;
  color: var(--brown-light);
  font-size: 1.3rem;
  flex-shrink: 0;
  transition: all var(--transition);
}

.edu-logo {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 0.5rem;
}

.edu-degree {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.edu-spec {
  font-size: 0.85rem;
  color: var(--cyan);
  margin-bottom: 0.4rem;
}

.edu-school {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.edu-dates {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* ── 11. Certifications Section ── */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.cert-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1.8rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-top: 3px solid var(--cyan);
  border-radius: 10px;
  transition: all var(--transition);
}

.cert-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--cyan-border);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(6, 182, 212, 0.1);
}

.cert-badge {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--cyan-dim);
  border-radius: 8px;
  color: var(--cyan);
  font-size: 1.2rem;
  transition: all var(--transition);
}

.cert-logo {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 0.5rem;
}

.cert-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
}

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

.cert-year {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.cert-verify-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--cyan);
  margin-top: auto;
  transition: opacity var(--transition);
}

.cert-verify-link:hover {
  opacity: 0.75;
}

.cert-note {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}

.cert-note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ── 12. Projects Section ── */
.proj-filter-bar {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.proj-filter-btn {
  padding: 0.5rem 1.4rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-main);
  background: transparent;
  border: 1.5px solid var(--border-hover);
  color: var(--text-secondary);
  transition: all var(--transition);
}

.proj-filter-btn:hover {
  border-color: var(--cyan-border);
  color: var(--cyan);
}

.proj-filter-btn.active {
  background: var(--cyan-dim);
  border-color: var(--cyan);
  color: var(--cyan);
}

.proj-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.proj-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: all var(--transition);
}

.proj-card:hover {
  border-color: var(--cyan-border);
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(6, 182, 212, 0.12);
}

.proj-img-wrap {
  height: 190px;
  overflow: hidden;
  background: var(--bg-secondary);
}

.proj-img-wrap--contain {
  background: var(--bg-card-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.proj-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.proj-img--contain {
  object-fit: contain;
  height: auto;
  max-height: 130px;
  width: auto;
  max-width: 100%;
}

.proj-card:hover .proj-img {
  transform: scale(1.05);
}

.proj-body {
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 0.6rem;
}

.proj-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.proj-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}

.proj-tech {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(35px, 1fr));
  gap: 0.6rem;
  justify-items: center;
}

.proj-tech-logo-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 5px;
  border-radius: 12px;
  background: var(--black);
  border: 1px solid var(--black-border);
  transition: all var(--transition);
  width: 50px;
  height: 50px;
}

.proj-tech-logo-wrapper:hover {
  background: rgba(196, 151, 62, 0.22);
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(196, 151, 62, 0.25);
}

.proj-tech-logo {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: brightness(0.95);
  transition: filter var(--transition);
}

.proj-tech-logo-wrapper:hover .proj-tech-logo {
  filter: brightness(1.1);
}

.proj-links {
  display: flex;
  gap: 1rem;
  padding-top: 0.4rem;
  border-top: 1px solid var(--border);
  margin-top: 0.2rem;
}

.proj-links a {
  color: var(--text-muted);
  font-size: 1.15rem;
  transition:
    color var(--transition),
    transform var(--transition);
}

.proj-links a:hover {
  color: var(--cyan);
  transform: translateY(-2px);
}

/* ── 13. Interests Section ── */
.interests-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

.interest-card {
  padding: 2rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-align: center;
  transition: all var(--transition);
  background: var(--grad-card);
}

.interest-card:hover {
  border-color: var(--cyan-border);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(6, 182, 212, 0.1);
}

.interest-icon {
  font-size: 2.2rem;
  margin-bottom: 1rem;
  display: block;
}

.interest-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  color: var(--text-primary);
}

.interest-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ── 14. Contact Section ── */
.contact-container {
  text-align: center;
}

.contact-sub {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
}

.contact-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.6rem;
  border: 1.5px solid var(--border-hover);
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  transition: all var(--transition);
}

.contact-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--cyan-dim);
  box-shadow: 0 4px 16px rgba(6, 182, 212, 0.12);
  transform: translateY(-2px);
}

/* ── 15. Footer ── */
footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2.5rem 8%;
  border-top: 1px solid var(--border);
  background: rgba(10, 10, 15, 0.6);
}

.footer-main {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}

.footer-sub {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  opacity: 0.6;
}

/* ── 16. Responsive Design ── */

/* Tablet */
@media (max-width: 1024px) {
  :root {
    --section-pad: 4rem 6%;
  }

  .about-grid {
    grid-template-columns: 200px 1fr;
    gap: 2.5rem;
  }

  .exp-layout {
    gap: 2rem;
  }

  .exp-tabs {
    min-width: 160px;
  }
}

/* Laptop */
@media (max-width: 1199px) {
  .skill-logo-wrapper {
    width: 44px;
    height: 44px;
  }

  .proj-tech-logo-wrapper {
    width: 44px;
    height: 44px;
  }

  .exp-logo {
    width: 50px;
    height: 50px;
  }

  .edu-icon-wrap {
    width: 50px;
    height: 50px;
  }

  .cert-badge {
    width: 48px;
    height: 48px;
  }
}

/* Tablet */
@media (max-width: 991px) {
  .nav-logo {
    font-size: 1.35rem;
  }

  .skill-logo-wrapper {
    width: 40px;
    height: 40px;
  }

  .proj-tech-logo-wrapper {
    width: 40px;
    height: 40px;
  }

  .exp-logo {
    width: 46px;
    height: 46px;
    padding: 0.4rem;
  }

  .edu-icon-wrap {
    width: 46px;
    height: 46px;
  }

  .cert-badge {
    width: 44px;
    height: 44px;
  }
}

/* Mobile */
@media (max-width: 768px) {
  :root {
    --section-pad: 3.5rem 5%;
  }

  /* Nav */
  #navbar {
    padding: 0 5%;
  }

  .nav-logo {
    font-size: 1.3rem;
  }

  .nav-links {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  /* Hero */
  .hero-pic-wrapper {
    width: 130px;
    height: 130px;
  }

  /* About */
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about-pic-wrapper {
    max-width: 220px;
    margin: 0 auto;
  }

  /* Skills */
  .skills-grid {
    grid-template-columns: repeat(auto-fill, minmax(36px, 1fr));
    gap: 0.6rem;
  }

  .skill-logo-wrapper {
    width: 36px;
    height: 36px;
    padding: 4px;
  }

  /* Experience */
  .exp-layout {
    flex-direction: column;
    gap: 0;
  }

  .exp-tabs {
    flex-direction: row;
    width: 100%;
    border-left: none;
    border-bottom: 2px solid var(--border);
    overflow-x: auto;
    min-width: unset;
    scrollbar-width: none;
  }

  .exp-tabs::-webkit-scrollbar {
    display: none;
  }

  .exp-tab {
    border-left: none;
    border-bottom: 2px solid transparent;
    margin-left: 0;
    margin-bottom: -2px;
    white-space: nowrap;
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
  }

  .exp-tab.active {
    border-left-color: transparent;
    border-bottom-color: var(--cyan);
  }

  .exp-content {
    padding-top: 1.5rem;
  }

  .exp-logo {
    width: 42px;
    height: 42px;
    padding: 0.35rem;
  }

  /* Education */
  .edu-icon-wrap {
    width: 42px;
    height: 42px;
  }

  /* Certifications */
  .cert-badge {
    width: 40px;
    height: 40px;
  }

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

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

  /* Project Tech */
  .proj-tech {
    grid-template-columns: repeat(auto-fill, minmax(36px, 1fr));
    gap: 0.6rem;
  }

  .proj-tech-logo-wrapper {
    width: 36px;
    height: 36px;
    padding: 4px;
  }

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

  .contact-buttons {
    flex-direction: column;
    align-items: center;
  }

  .contact-btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .nav-logo {
    font-size: 1.2rem;
  }

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

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  /* Skills */
  .skills-grid {
    grid-template-columns: repeat(auto-fill, minmax(32px, 1fr));
    gap: 0.5rem;
  }

  .skill-logo-wrapper {
    width: 32px;
    height: 32px;
    padding: 4px;
  }

  /* Experience */
  .exp-logo {
    width: 38px;
    height: 38px;
    padding: 0.3rem;
  }

  /* Education */
  .edu-icon-wrap {
    width: 38px;
    height: 38px;
  }

  /* Certifications */
  .cert-badge {
    width: 36px;
    height: 36px;
  }

  /* Project Tech */
  .proj-tech {
    grid-template-columns: repeat(auto-fill, minmax(32px, 1fr));
    gap: 0.5rem;
  }

  .proj-tech-logo-wrapper {
    width: 32px;
    height: 32px;
    padding: 4px;
  }

  .btn {
    width: 100%;
    max-width: 260px;
    justify-content: center;
  }

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