/* ---------- Base colours & typography ---------- */
:root {
  --bg-body: #f5f5f7;
  --bg-section-light: #fff;
  --text-main: #212529;
  --text-muted: #6c757d;
  --accent: #0d6efd;
  --accent-soft: #e7f0ff;
  --card-border: #dde1ea;
  --surface-bg: #fff;
  --surface-border: var(--card-border);
  --surface-shadow: 0 10px 24px rgba(0, 0, 0, .08);
  --surface-radius: 16px;
  --surface-hover-bg: linear-gradient(135deg, #ffffff, #f7f9ff);
  --surface-hover-border: rgba(13, 110, 253, .28);
  --surface-hover-shadow: 0 16px 32px rgba(0, 0, 0, .12);
  --surface-focus-border: rgba(13, 110, 253, .35);
  --surface-focus-shadow: 0 16px 32px rgba(0, 0, 0, .12);
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg-body);
  color: var(--text-main);
  scroll-behavior: smooth;
}

section { scroll-margin-top: 80px; }

/* ---------- Navbar ---------- */
#mainNavbar {
  background: linear-gradient(120deg, rgba(15, 23, 42, .95), rgba(20, 30, 48, .9));
  box-shadow: 0 8px 25px rgba(0, 0, 0, .35);
}
#mainNavbar .navbar-brand {
  font-weight: 700;
  letter-spacing: .02em;
}
#mainNavbar .nav-link {
  font-size: .95rem;
  color: #ffffff;
  padding: .6rem .8rem;
  position: relative;
  transition: color .2s;
}
#mainNavbar .nav-link.active { color: #fff; }
#mainNavbar .nav-link::after {
  content: "";
  position: absolute;
  left: 10%;
  bottom: 4px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), #5c7bff);
  transition: width .2s;
  border-radius: 999px;
}
#mainNavbar .nav-link:hover,
#mainNavbar .nav-link:focus { color: #fff; }
#mainNavbar .nav-link:hover::after,
#mainNavbar .nav-link:focus::after,
#mainNavbar .nav-link.active::after { width: 80%; }

#mainNavbar #themeToggle {
  padding: .4rem .8rem;
  border: 1px solid rgba(255, 255, 255, .35);
  color: #e6ebf5;
  background: rgba(255, 255, 255, .08);
  border-radius: 10px;
  transition: background .2s, transform .2s, box-shadow .2s;
}
#mainNavbar #themeToggle:hover,
#mainNavbar #themeToggle:focus {
  background: rgba(255, 255, 255, .14);
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(0, 0, 0, .25);
}

@media (max-width: 991.98px) {
  #mainNavbar .offcanvas {
    background: linear-gradient(120deg, rgba(15, 23, 42, 0.98), rgba(20, 30, 48, 0.96));
  }

  #mainNavbar .offcanvas-header {
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  #mainNavbar .offcanvas-body {
    padding-top: 0.75rem;
  }
}

/* ---------- Hero ---------- */
#hero {
  position: relative;
  padding-top: 110px;
}
#hero .container { position: relative; z-index: 2; }

#hero .hero-copy {
  position: relative;
  background: linear-gradient(145deg, rgba(255, 255, 255, .94), rgba(246, 248, 255, .9));
  border: 1px solid rgba(227, 232, 242, .8);
  border-radius: 20px;
  padding: 2.2rem;
  backdrop-filter: blur(10px);
  box-shadow: 0 25px 70px rgba(13, 110, 253, .08), 0 18px 40px rgba(15, 23, 42, .08);
}
#hero .hero-copy::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(13, 110, 253, .25), rgba(92, 123, 255, .18), rgba(13, 110, 253, 0));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  pointer-events: none;
}

#hero h1 {
  font-size: clamp(2.7rem, 4.5vw, 3.9rem);
  letter-spacing: -.025em;
}
#hero .lead {
  font-weight: 500;
  color: #1f2a3d;
}
#hero .text-muted { color: #4a5568 !important; }

#hero .rounded-circle {
  background: linear-gradient(135deg, var(--accent), #5c7bff);
  color: #fff;
  box-shadow: 0 20px 45px rgba(13, 110, 253, .35);
}

.hero-avatar {
  width: 240px;
  height: 240px;
  object-fit: cover;
  box-shadow: 0 24px 55px rgba(13, 110, 253, .35), 0 0 0 12px rgba(255, 255, 255, .9);
  background: linear-gradient(135deg, var(--accent), #5c7bff);
}

/* ---------- Generic sections ---------- */
.bg-light { background: var(--bg-section-light) !important; }

.section-shell {
  padding: 4.5rem 0;
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
}

/* ---------- About section ---------- */

#about .about-panel {
  background: linear-gradient(135deg, rgba(255, 255, 255, .95), rgba(246, 248, 255, .92));
  border: 1px solid #e3e8f2;
  border-radius: 18px;
  padding: 1.75rem;
  box-shadow: 0 18px 38px rgba(15, 23, 42, .08);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease;
}

#about .about-panel:hover,
#about .about-panel:focus-within {
  transform: translateY(-4px);
  box-shadow: 0 22px 44px rgba(15, 23, 42, .12);
  border-color: rgba(13, 110, 253, .25);
}

#about .about-chip {
  display: inline-flex;
  align-items: center;
  padding: .4rem .75rem;
  background: #eef3ff;
  color: #11376b;
  border: 1px solid #d6e3ff;
  font-weight: 700;
  font-size: .9rem;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease, border-color .15s ease;
}

#about .about-chip:hover {
  transform: translateY(-1px);
  background: #e2e9ff;
  border-color: #c6d7ff;
  box-shadow: 0 8px 18px rgba(13, 110, 253, .14);
}

#about .about-quick-card {
  background: linear-gradient(145deg, #fff, #f6f8ff);
  border: 1px solid #e3e8f2;
  border-radius: 18px;
  padding: 1.5rem;
  box-shadow: 0 18px 38px rgba(15, 23, 42, .08);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease;
}

#about .about-quick-card:hover,
#about .about-quick-card:focus-within {
  transform: translateY(-4px);
  box-shadow: 0 22px 44px rgba(15, 23, 42, .12);
  border-color: rgba(13, 110, 253, .25);
}

#about .about-quick-list {
  display: grid;
  row-gap: .65rem;
}

#about .about-quick-row {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: .6rem;
  align-items: baseline;
  font-size: .95rem;
}
#about .about-quick-row dt {
  margin: 0;
  color: #4a5a74;
  font-weight: 700;
  letter-spacing: .01em;
}
#about .about-quick-row dd {
  margin: 0;
  color: #1f2a3d;
  font-weight: 600;
}

#about .about-dot {
  width: 10px;
  height: 10px;
  background: linear-gradient(120deg, var(--accent), #6610f2);
  box-shadow: 0 0 0 6px rgba(13, 110, 253, .08);
  display: inline-block;
  position: relative;
  isolation: isolate;
  border-radius: 50%;
}

#about .about-dot::after {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 2px solid rgba(13, 110, 253, .4);
  opacity: 0.7;
  animation: about-dot-pulse 2.2s ease-out infinite;
}

@keyframes about-dot-pulse {
  0% { transform: scale(0.75); opacity: 0.65; }
  50% { transform: scale(1.35); opacity: 0.2; }
  100% { transform: scale(1.55); opacity: 0; }
}

/* ---------- Education ---------- */
#education .card-title { margin-bottom: .35rem; }
#education .card-subtitle { font-size: .95rem; color: #6c757d; }

/* ---------- Shared surface shells (cards/accordions) ---------- */
#education .education-accordion .accordion-item,
#experience .experience-accordion .accordion-item,
#projects .card {
  border-radius: var(--surface-radius);
  border: 1px solid var(--surface-border);
  background: var(--surface-bg);
  box-shadow: var(--surface-shadow);
  overflow: hidden;
  transition: transform .2s, box-shadow .2s, border-color .2s, background .2s;
}

#education .education-accordion .accordion-item + .accordion-item,
#experience .experience-accordion .accordion-item + .accordion-item {
  margin-top: 1rem;
}

#education .education-accordion .accordion-item:hover,
#experience .experience-accordion .accordion-item:hover,
#projects .card:hover {
  transform: translateY(-4px);
  box-shadow: var(--surface-hover-shadow);
  border-color: var(--surface-hover-border);
  background: var(--surface-hover-bg);
}

#education .education-accordion .accordion-item:focus-within,
#experience .experience-accordion .accordion-item:focus-within,
#projects .card:focus-within {
  border-color: var(--surface-focus-border);
  box-shadow: var(--surface-focus-shadow);
  transform: translateY(-2px);
}

#education .education-accordion .accordion-button,
#experience .experience-accordion .accordion-button {
  background: transparent;
  padding: 1.25rem 1.25rem;
  align-items: flex-start;
}

#education .education-accordion .accordion-button:focus,
#experience .experience-accordion .accordion-button:focus {
  box-shadow: 0 0 0 .15rem rgba(13, 110, 253, .18);
}

#education .education-accordion .accordion-button:not(.collapsed),
#experience .experience-accordion .accordion-button:not(.collapsed) {
  color: inherit;
  background: rgba(13, 110, 253, .04);
  box-shadow: none;
}

#education .education-accordion .accordion-body,
#experience .experience-accordion .accordion-body {
  padding: 0 1.25rem 1.25rem;
}

#projects .card-subtitle,
#experience .card-subtitle { color: #6c757d; }

#education .education-header {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  margin-bottom: 0;
  width: 100%;
}

#education .education-meta {
  flex: 1 1 auto;
  text-align: left;
}
/* ---------- Cards ---------- */
.card-title { font-weight: 600; }

/* ---------- Experience section ---------- */
#experience .experience-header {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  margin-bottom: 0;
  width: 100%;
}

#experience .experience-meta {
  flex: 1 1 auto;
}

#experience .company-logo {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  padding: 0;
  overflow: hidden;
  background: rgba(13, 110, 253, 0.06);
  border: 1px solid rgba(15, 23, 42, 0.08);
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.1);
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
#experience .company-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.1);
  display: block;
}
/* ---------- Projects ---------- */
#projects { background: #f8f9fc; }
/* ---------- Section backgrounds (light mode) ---------- */
#hobbies,
#about,
#skills,
#education,
#experience,
#projects,
#hero {
  background: radial-gradient(circle at 15% 15%, rgba(13, 110, 253, 0.06), transparent 45%),
    radial-gradient(circle at 80% 20%, rgba(92, 123, 255, 0.06), transparent 40%),
    linear-gradient(180deg, #f7f9fd, #f3f5fb) !important;
}
/* ---------- Hobbies section ---------- */
#hobbies h2 {
  font-weight: 700;
  letter-spacing: -0.01em;
}

#hobbies .hobby-card {
  position: relative;
  overflow: hidden;
  border-radius: 18px;
  border: 1px solid rgba(227, 232, 242, 0.9) !important;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(246, 248, 255, 0.9));
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

#hobbies .hobby-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 10%, rgba(13, 110, 253, 0.12), transparent 45%);
  opacity: 0.9;
  pointer-events: none;
}

#hobbies .hobby-card > * {
  position: relative;
  z-index: 1;
}

#hobbies .hobby-card h5 {
  font-weight: 700;
  margin-bottom: 0.5rem;
}

#hobbies .hobby-title {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

#hobbies .hobby-icon {
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(13, 110, 253, 0.12);
  color: #0d6efd;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
  flex: 0 0 auto;
}

#hobbies .hobby-icon svg {
  width: 16px;
  height: 16px;
}

#hobbies .hobby-card p {
  color: #4a5568;
  line-height: 1.55;
}

#hobbies .hobby-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 44px rgba(15, 23, 42, 0.12);
  border-color: rgba(13, 110, 253, 0.35) !important;
}


/* ---------- Skills ---------- */
#skills .progress {
  height: .8rem;
  background: #e6e7ec;
}

#skills .progress-bar {
  background: linear-gradient(90deg, var(--accent), #6610f2);
  transition: width 1.1s;
}

/* ---------- Contact ---------- */
#contact {
  background: radial-gradient(circle at 20% 20%, rgba(13, 110, 253, .05), transparent 40%),
    linear-gradient(180deg, #f7f9fd, #f3f5fb);
}

#contact h2 { font-weight: 700; letter-spacing: -.01em; }

#contact .contact-info {
  background: rgba(255, 255, 255, .9);
  border: 1px solid #e3e8f2;
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: 0 15px 35px rgba(15, 23, 42, .08);
}

#contact .contact-list li {
  margin-bottom: .4rem;
  padding-left: 1.2rem;
  position: relative;
}
#contact .contact-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 800;
}

#contact .contact-cta {
  border: 1px solid var(--accent);
  color: var(--accent);
  font-weight: 600;
  border-radius: 12px;
  padding: .55rem 1.1rem;
  transition: all .2s;
}
#contact .contact-cta:hover,
#contact .contact-cta:focus {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 10px 24px rgba(13, 110, 253, .25);
}

/* ---------- Back to top ---------- */
#backToTop {
  box-shadow: 0 8px 20px rgba(0, 0, 0, .25);
}

/* ---------- Dark mode ---------- */
body.dark-mode {
  --bg-body: #121212;
  --bg-section-light: #1e1e1e;
  --text-main: #f8f9fa;
  --text-muted: #b0b3b8;
  --card-border: #343a40;
  --surface-bg: #1b1f2a;
  --surface-border: #2f3642;
  --surface-shadow: 0 10px 24px rgba(0, 0, 0, .5);
  --surface-hover-bg: linear-gradient(135deg, #1b1f2a, #181c28);
  --surface-hover-border: rgba(92, 123, 255, .45);
  --surface-hover-shadow: 0 16px 32px rgba(0, 0, 0, .6);
  --surface-focus-border: rgba(92, 123, 255, .55);
  --surface-focus-shadow: 0 16px 32px rgba(0, 0, 0, .65);
}

body.dark-mode .card {
  background: #1f1f1f;
  border-color: var(--card-border);
  color: var(--text-main);
}

body.dark-mode .navbar {
  background: linear-gradient(120deg, rgba(7, 10, 16, .95), rgba(15, 20, 30, .95)) !important;
}

body.dark-mode footer.bg-dark { background: #000 !important; }

body.dark-mode #hero .hero-copy {
  background: linear-gradient(145deg, rgba(20, 24, 32, .92), rgba(18, 22, 30, .96));
  border-color: #2f3642;
  box-shadow: 0 28px 70px rgba(0, 0, 0, .55);
  color: #ffffff;
}

body.dark-mode #hero .lead,
body.dark-mode #hero .text-muted { color: #ffffff !important; }

body.dark-mode .hero-avatar {
  box-shadow: 0 24px 55px rgba(0, 0, 0, .55), 0 0 0 12px rgba(24, 26, 32, .95);
}

body.dark-mode #contact {
  background: radial-gradient(circle at 20% 20%, rgba(13, 110, 253, .12), transparent 40%),
    linear-gradient(180deg, #0f1118, #0b0d15);
}

body.dark-mode #contact .contact-info {
  background: rgba(24, 26, 32, .92);
  border-color: #2f3642;
  box-shadow: 0 18px 40px rgba(0, 0, 0, .5);
  color: #e4e8f0;
}

body.dark-mode #contact .contact-list li::before { color: #5c7bff; }

body.dark-mode .text-muted { color: #c3c7d1 !important; }

body.dark-mode #about .about-panel {
  background: linear-gradient(135deg, rgba(24, 26, 32, .96), rgba(20, 22, 30, .92));
  border-color: #2f3642;
  box-shadow: 0 18px 40px rgba(0, 0, 0, .55);
}

body.dark-mode #about .about-panel:hover,
body.dark-mode #about .about-panel:focus-within {
  border-color: rgba(92, 123, 255, .45);
  box-shadow: 0 24px 52px rgba(0, 0, 0, .65);
}

body.dark-mode #about .about-chip {
  background: rgba(92, 123, 255, .14);
  color: #e2e9ff;
  border-color: #3f4f80;
}

body.dark-mode #about .about-chip:hover {
  background: rgba(92, 123, 255, .22);
  border-color: rgba(92, 123, 255, .55);
  box-shadow: 0 10px 20px rgba(0, 0, 0, .55);
}

body.dark-mode #about .about-quick-card {
  background: linear-gradient(145deg, rgba(24, 26, 32, .96), rgba(18, 20, 28, .94));
  border-color: #2f3642;
  color: #e4e8f0;
  box-shadow: 0 18px 40px rgba(0, 0, 0, .55);
}

body.dark-mode #about .about-quick-card:hover,
body.dark-mode #about .about-quick-card:focus-within {
  border-color: rgba(92, 123, 255, .45);
  box-shadow: 0 24px 52px rgba(0, 0, 0, .65);
}

body.dark-mode #about .about-quick-row dt { color: #b7bed0; }
body.dark-mode #about .about-quick-row dd { color: #f1f4fc; }

body.dark-mode #about .about-dot {
  box-shadow: 0 0 0 6px rgba(92, 123, 255, .18);
}

body.dark-mode #about .about-dot::after {
  border-color: rgba(92, 123, 255, .55);
}

body.dark-mode #education .education-accordion .accordion-button,
body.dark-mode #experience .experience-accordion .accordion-button {
  color: #ffffff;
}

body.dark-mode #education .education-accordion .accordion-body,
body.dark-mode #experience .experience-accordion .accordion-body {
  color: #ffffff;
}

body.dark-mode #education .education-accordion .accordion-body li,
body.dark-mode #experience .experience-accordion .accordion-body li {
  color: inherit;
}

body.dark-mode #education .education-accordion .accordion-button::after,
body.dark-mode #experience .experience-accordion .accordion-button::after {
  filter: invert(1);
}

body.dark-mode #education .education-accordion .accordion-button:not(.collapsed),
body.dark-mode #experience .experience-accordion .accordion-button:not(.collapsed) {
  background: rgba(92, 123, 255, .08);
}

body.dark-mode #experience .card-subtitle,
body.dark-mode #projects .card-subtitle { color: #cfd6e2; }

body.dark-mode #experience .company-logo {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12) !important;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.45);
}

/* ---------- Section backgrounds (dark mode) ---------- */
body.dark-mode #hobbies,
body.dark-mode #about,
body.dark-mode #skills,
body.dark-mode #education,
body.dark-mode #experience,
body.dark-mode #projects,
body.dark-mode #hero {
  background: radial-gradient(circle at 15% 15%, rgba(13, 110, 253, 0.12), transparent 45%),
    linear-gradient(180deg, #0f1118, #0b0d15) !important;
}

body.dark-mode #hobbies .hobby-card {
  background: rgba(24, 26, 32, 0.92);
  border-color: #2f3642 !important;
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.5);
}

body.dark-mode #hobbies .hobby-card p {
  color: #ffffff;
}

body.dark-mode #hobbies .hobby-icon {
  background: rgba(92, 123, 255, 0.16);
  color: #8fb0ff;
  box-shadow: none;
}

body.dark-mode #hobbies .hobby-card:hover {
  box-shadow: 0 20px 44px rgba(0, 0, 0, 0.65);
  border-color: rgba(92, 123, 255, 0.5) !important;
}

body.dark-mode #projects { background: #0f1118; }

body.dark-mode #skills .progress { background: #2c3240; }

body.dark-mode #skills .progress-bar {
  background: linear-gradient(90deg, #4f8bfd, #6610f2);
}

body.dark-mode .modal-content {
  background: #1f1f1f;
  color: #e4e8f0;
  border-color: #2f3642;
}

body.dark-mode .modal-header,
body.dark-mode .modal-footer { border-color: #2f3642; }

body.dark-mode .modal-title { color: #e4e8f0; }

body.dark-mode .btn-close {
  filter: invert(1) grayscale(100%) brightness(200%);
}
/* ---------- Responsive ---------- */
@media (max-width: 767.98px) {
  #about .about-quick-row {
    grid-template-columns: 1fr;
    row-gap: .2rem;
  }
}