/* ============================================
   PORTFOLIO — MAIN STYLESHEET
   Modern Glassmorphism | Dark/Light Mode
   Mobile-First Responsive Design
   ============================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Palette — Dark (default) */
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-card: rgba(255, 255, 255, 0.04);
  --text-primary: #f0f0f0;
  --text-secondary: #a0a0b8;
  --accent: #6c63ff;
  --accent-hover: #5a52e0;
  --accent-glow: rgba(108, 99, 255, 0.35);
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --nav-bg: rgba(15, 15, 26, 0.85);
  --skill-bar-bg: rgba(255, 255, 255, 0.08);
  --footer-bg: #0a0a14;
  --border-radius: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  --bg-primary: #f5f5fa;
  --bg-secondary: #eeeef5;
  --bg-card: rgba(0, 0, 0, 0.03);
  --text-primary: #1a1a2e;
  --text-secondary: #555570;
  --glass-bg: rgba(255, 255, 255, 0.65);
  --glass-border: rgba(0, 0, 0, 0.08);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  --nav-bg: rgba(245, 245, 250, 0.85);
  --skill-bar-bg: rgba(0, 0, 0, 0.06);
  --footer-bg: #e4e4ee;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  font-size: 16px;
}

body {
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

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

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

ul {
  list-style: none;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

/* ---------- Utility: Glass ---------- */
.glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-radius: var(--border-radius);
  box-shadow: var(--glass-shadow);
}

/* ---------- NAVBAR ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  transition: background var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 5%;
  max-width: 1400px;
  margin: 0 auto;
}

.nav-logo {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.5px;
}

.nav-menu {
  display: flex;
  gap: 2rem;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  transition: color var(--transition);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: width var(--transition);
}

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  transition: background var(--transition);
  position: relative;
  overflow: hidden;
}

.theme-toggle:hover {
  background: var(--glass-bg);
}

.theme-toggle svg {
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-toggle.spin svg {
  transform: rotate(360deg);
}

[data-theme="dark"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: none; }

/* Theme transition overlay */
.theme-transition-overlay {
  position: fixed;
  z-index: 99999;
  pointer-events: none;
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(0);
  opacity: 1;
}

.theme-transition-overlay.expand {
  animation: theme-expand 0.7s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes theme-expand {
  0% {
    transform: translate(-50%, -50%) scale(0);
    opacity: 1;
  }
  80% {
    opacity: 1;
  }
  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0;
  }
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-hamburger.active span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 28px var(--accent-glow);
}

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

.btn-outline:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.85rem;
  background: var(--accent);
  color: #fff;
  border-radius: 50px;
  display: inline-block;
}

.btn-sm:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.05rem;
}

.btn-block {
  width: 100%;
  justify-content: center;
}

/* ---------- SECTION COMMON ---------- */
.section {
  padding: 6rem 0;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  font-size: 1rem;
}

/* ---------- SCROLL REVEAL ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ---------- HERO ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.hero-particles .particle {
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  opacity: 0.18;
  animation: float-particle linear infinite;
}

@keyframes float-particle {
  0% { transform: translateY(0) scale(1); opacity: 0.18; }
  50% { opacity: 0.35; }
  100% { transform: translateY(-100vh) scale(0.5); opacity: 0; }
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 3rem;
  position: relative;
  z-index: 1;
}

.hero-greeting {
  font-size: 1.1rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.hero-name {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 0.5rem;
}

.hero-tagline {
  font-size: 1.25rem;
  color: var(--accent);
  font-weight: 500;
  min-height: 1.8rem;
  margin-bottom: 0.75rem;
}

.hero-description {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 1.75rem;
  max-width: 480px;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.hero-socials {
  display: flex;
  gap: 1rem;
}

.hero-socials a {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  transition: all var(--transition);
}

.hero-socials a:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 4px 15px var(--accent-glow);
}

.hero-socials a svg {
  width: 20px;
  height: 20px;
}

.hero-img-wrapper {
  width: 100%;
  max-width: 1050px;
  aspect-ratio: 1;
  margin: 0 auto;
  padding-top: 0;
  padding-left: 0;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  position: relative;
  z-index: 1;
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

.scroll-down {
  position: absolute;
  bottom: 2rem;
  color: var(--text-secondary);
  animation: bounce 2s ease infinite;
  z-index: 1;
}

.scroll-down svg {
  width: 28px;
  height: 28px;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-10px); }
  60% { transform: translateY(-5px); }
}

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

.about-text h3 {
  font-size: 1.6rem;
  margin-bottom: 1rem;
  color: var(--accent);
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.about-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
}

.detail-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.detail-item svg {
  width: 20px;
  height: 20px;
  color: var(--accent);
  flex-shrink: 0;
}

.detail-item strong {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.detail-item span {
  font-size: 0.95rem;
  font-weight: 500;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.stat-card {
  padding: 1.75rem;
  text-align: center;
  transition: transform var(--transition);
}

.stat-card:hover {
  transform: translateY(-4px);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}

.stat-number::after {
  content: "+";
}

.stat-card p {
  margin-top: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ---------- SKILLS ---------- */
.skills-tabs {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 0.6rem 1.5rem;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--text-secondary);
  border-radius: 50px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition);
}

.tab-btn:hover,
.tab-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.skills-panel {
  display: none;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem;
}

.skills-panel.active {
  display: grid;
}

.skill-card {
  padding: 1.5rem;
  text-align: center;
  transition: transform var(--transition);
}

.skill-card:hover {
  transform: translateY(-5px);
}

.skill-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.skill-card h4 {
  font-size: 1rem;
  margin-bottom: 0.75rem;
}

.skill-bar {
  width: 100%;
  height: 6px;
  background: var(--skill-bar-bg);
  border-radius: 3px;
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent), #a18cd1);
  border-radius: 3px;
  transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- PROJECTS ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.75rem;
}

.project-card {
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(108, 99, 255, 0.2);
}

.project-img {
  position: relative;
  overflow: hidden;
}

.project-img img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.5s;
}

.project-card:hover .project-img img {
  transform: scale(1.08);
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: rgba(108, 99, 255, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  opacity: 0;
  transition: opacity var(--transition);
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-overlay a {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  color: #fff;
  transition: background var(--transition), transform var(--transition);
}

.project-overlay a:hover {
  background: rgba(255, 255, 255, 0.35);
  transform: scale(1.1);
}

.project-overlay a svg {
  width: 22px;
  height: 22px;
}

.project-info {
  padding: 1.25rem 1.5rem 1.5rem;
}

.project-info h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.project-info p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  line-height: 1.6;
}

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

.project-tech span {
  padding: 0.3rem 0.75rem;
  font-size: 0.78rem;
  font-weight: 500;
  background: rgba(108, 99, 255, 0.12);
  color: var(--accent);
  border-radius: 50px;
}

/* ---------- EDUCATION ---------- */
.education-timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 2rem;
}

.education-timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--accent), transparent);
  border-radius: 3px;
}

.edu-card {
  position: relative;
  padding: 1.75rem 2rem;
  margin-bottom: 1.75rem;
  transition: transform var(--transition);
}

.edu-card:hover {
  transform: translateX(6px);
}

.edu-card::before {
  content: "";
  position: absolute;
  left: -2.55rem;
  top: 2rem;
  width: 14px;
  height: 14px;
  background: var(--accent);
  border: 3px solid var(--bg-primary);
  border-radius: 50%;
  z-index: 1;
  transition: background var(--transition), border-color var(--transition);
}

.edu-card:hover::before {
  box-shadow: 0 0 12px var(--accent-glow);
}

.edu-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(108, 99, 255, 0.12);
  margin-bottom: 1rem;
}

.edu-icon svg {
  width: 24px;
  height: 24px;
  color: var(--accent);
}

.edu-year {
  display: inline-block;
  padding: 0.3rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  background: rgba(108, 99, 255, 0.1);
  border-radius: 50px;
  margin-bottom: 0.75rem;
}

.edu-content h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.edu-institution {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

.edu-institution svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.edu-details {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.edu-description {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

@media (max-width: 768px) {
  .education-timeline {
    padding-left: 1.5rem;
  }

  .edu-card {
    padding: 1.25rem 1.25rem;
  }

  .edu-card::before {
    left: -2.05rem;
    width: 12px;
    height: 12px;
  }
}

/* ---------- CERTIFICATIONS ---------- */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

.cert-card {
  padding: 2rem 1.5rem;
  text-align: center;
  transition: transform var(--transition);
}

.cert-card:hover {
  transform: translateY(-5px);
}

.cert-icon {
  margin-bottom: 1rem;
}

.cert-icon svg {
  width: 40px;
  height: 40px;
  color: var(--accent);
}

.cert-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.cert-org {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.cert-year {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

/* ---------- RESUME BANNER ---------- */
.resume-section {
  padding: 3rem 0;
}

.resume-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 3rem;
  gap: 2rem;
  flex-wrap: wrap;
}

.resume-text h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.resume-text p {
  color: var(--text-secondary);
}

/* ---------- CONTACT ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

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

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
}

.contact-item svg {
  width: 24px;
  height: 24px;
  color: var(--accent);
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.15rem;
}

.contact-item a,
.contact-item p {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.contact-item a:hover {
  color: var(--accent);
}

.map-wrapper {
  overflow: hidden;
  padding: 0.5rem;
}

/* Contact Socials */
.contact-socials {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.5rem;
  flex-wrap: wrap;
}

.social-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  color: #fff;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.social-icon:hover {
  transform: translateY(-4px) scale(1.08);
}

.social-github {
  background: #333;
}
.social-github:hover {
  box-shadow: 0 6px 20px rgba(51, 51, 51, 0.45);
}

.social-linkedin {
  background: #0A66C2;
}
.social-linkedin:hover {
  box-shadow: 0 6px 20px rgba(10, 102, 194, 0.45);
}

.social-x {
  background: #000;
}
.social-x:hover {
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.45);
}

.social-instagram {
  background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
}
.social-instagram:hover {
  box-shadow: 0 6px 20px rgba(225, 48, 108, 0.45);
}

.social-email {
  background: #EA4335;
}
.social-email:hover {
  box-shadow: 0 6px 20px rgba(234, 67, 53, 0.45);
}

/* Contact Form */
.contact-form {
  padding: 2.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  font-size: 0.95rem;
  font-family: inherit;
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  background: var(--bg-card);
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
}

.form-group textarea {
  resize: vertical;
}

.form-status {
  margin-top: 1rem;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 500;
}

.form-status.success {
  color: #43e97b;
}

.form-status.error {
  color: #ff6584;
}

/* ---------- FOOTER ---------- */
.footer {
  background: var(--footer-bg);
  padding: 3rem 0 0;
  transition: background var(--transition);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  padding-bottom: 2rem;
}

.footer-brand p {
  color: var(--text-secondary);
  margin-top: 0.75rem;
  font-size: 0.9rem;
  max-width: 300px;
}

.footer-links h4,
.footer-socials h4 {
  font-size: 1rem;
  margin-bottom: 1rem;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition);
}

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

.social-icons {
  display: flex;
  gap: 0.75rem;
}

.social-icons a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  transition: all var(--transition);
}

.social-icons a:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-3px);
}

.social-icons a svg {
  width: 18px;
  height: 18px;
}

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

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ---------- BACK TO TOP ---------- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition);
  box-shadow: 0 4px 15px var(--accent-glow);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--accent-hover);
  transform: translateY(-3px);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

/* Tablet */
@media (max-width: 992px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-text {
    order: 2;
  }

  .hero-image {
    order: 1;
  }

  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-buttons {
    justify-content: center;
  }

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

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

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

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

  .resume-banner {
    justify-content: center;
    text-align: center;
  }
}

/* Mobile */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    flex-direction: column;
    background: var(--bg-secondary);
    padding: 5rem 2rem 2rem;
    gap: 1.25rem;
    transition: right var(--transition);
    z-index: 999;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.2);
  }

  .nav-menu.open {
    right: 0;
  }

  .nav-hamburger {
    display: flex;
    z-index: 1001;
  }

  .hero-img-wrapper {
    max-width: 720px;
  }

  .hero-name {
    font-size: 2.2rem;
  }

  .section-title {
    font-size: 1.8rem;
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .social-icons {
    justify-content: center;
  }

  .resume-banner {
    padding: 2rem 1.5rem;
  }

  .contact-form {
    padding: 1.5rem;
  }

  .skills-tabs {
    gap: 0.5rem;
  }

  .tab-btn {
    padding: 0.5rem 1rem;
    font-size: 0.82rem;
  }

  .skills-panel {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

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

  .hero-img-wrapper {
    max-width: 550px;
  }
}