/* Light Mode (Default) */
:root {
  --bg: #f5f7fa;
  --card: #ffffff;
  --soft: #e8ecf4;
  --text: #1a2035;
  --muted: #5a6580;
  --brand: #4a7fff;
  --brand2: #00b8d4;
  --border: rgba(0, 0, 0, 0.08);
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.12);
  --radius: 18px;
  --max: 1080px;
  --gradient-opacity: 0.15;
}

/* Dark Mode */
[data-theme="dark"] {
  --bg: #0b1020;
  --card: #111a33;
  --soft: #18224a;
  --text: #e7ecff;
  --muted: #aab4e6;
  --brand: #7aa2ff;
  --brand2: #62e6ff;
  --border: rgba(255, 255, 255, 0.1);
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.45);
  --gradient-opacity: 0.25;
}

* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    Segoe UI,
    Roboto,
    Arial,
    "Noto Sans",
    "Helvetica Neue",
    sans-serif;
  color: var(--text);
  background:
    radial-gradient(
      900px 420px at 20% -10%,
      rgba(74, 127, 255, var(--gradient-opacity)),
      transparent 60%
    ),
    radial-gradient(
      700px 420px at 95% 10%,
      rgba(0, 184, 212, var(--gradient-opacity)),
      transparent 55%
    ),
    radial-gradient(
      700px 520px at 40% 110%,
      rgba(74, 127, 255, calc(var(--gradient-opacity) * 0.6)),
      transparent 55%
    ),
    var(--bg);
  line-height: 1.55;
  transition:
    background 0.3s ease,
    color 0.3s ease;
}

a {
  color: inherit;
  text-decoration: none;
}
.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px;
}

/* NAV */
nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(245, 247, 250, 0.85);
  border-bottom: 1px solid var(--border);
}

[data-theme="dark"] nav {
  background: rgba(11, 16, 32, 0.85);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 24px;
}
.logo {
  display: flex;
  gap: 10px;
  align-items: center;
  font-weight: 700;
  letter-spacing: 0.2px;
}
.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  box-shadow: 0 0 22px rgba(74, 127, 255, 0.45);
}
.nav-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.nav-links a {
  padding: 8px 10px;
  border-radius: 12px;
  color: var(--text);
  font-weight: 500;
}
.nav-links a:hover {
  background: rgba(0, 0, 0, 0.05);
  color: var(--brand);
}

[data-theme="dark"] .nav-links a:hover {
  background: rgba(255, 255, 255, 0.06);
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  cursor: pointer;
  transition:
    0.2s transform,
    0.2s background;
}

.theme-toggle:hover {
  transform: scale(1.05);
  background: var(--soft);
}

.theme-icon {
  font-size: 18px;
  transition: transform 0.3s ease;
}

.theme-toggle:hover .theme-icon {
  transform: rotate(20deg);
}

/* HERO */
.hero {
  padding: 46px 0 26px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 18px;
  align-items: stretch;
}
.card {
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.06),
    rgba(255, 255, 255, 0.03)
  );
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.hero-main {
  padding: 26px;
}
.hero-side {
  padding: 22px;
}

.kicker {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(74, 127, 255, 0.1);
  border: 1px solid rgba(74, 127, 255, 0.2);
  color: var(--brand);
  font-size: 14px;
}
h1 {
  margin: 14px 0 8px;
  font-size: 42px;
  line-height: 1.12;
}
.sub {
  color: var(--muted);
  margin: 0 0 16px;
  font-size: 16px;
}
.text-strong {
  color: var(--text);
}

.chips {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 14px 0 18px;
}
.chip {
  padding: 7px 10px;
  border-radius: 999px;
  font-size: 13px;
  background: var(--soft);
  border: 1px solid var(--border);
  color: var(--text);
}
.btns {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 10px;
}
.btn {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  justify-content: center;
  padding: 11px 14px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--soft);
  color: var(--text);
  transition:
    0.15s transform,
    0.15s background;
}
.btn:hover {
  transform: translateY(-1px);
  background: var(--card);
  box-shadow: var(--shadow);
}
.btn.primary {
  border-color: rgba(122, 162, 255, 0.35);
  background: linear-gradient(
    135deg,
    rgba(122, 162, 255, 0.22),
    rgba(98, 230, 255, 0.14)
  );
}

/* STATS */
.stat {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--soft);
  border: 1px solid var(--border);
  margin-bottom: 10px;
}
.stat b {
  font-size: 14px;
}
.stat span {
  color: var(--muted);
  font-size: 14px;
}

/* SECTIONS */
section {
  padding: 20px 0;
}
.section-title {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: end;
  flex-wrap: wrap;
  margin: 10px 0 12px;
}
h2 {
  margin: 0;
  font-size: 22px;
}
.hint {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(12, minmax(0, 1fr));
}
.col-6 {
  grid-column: span 6;
}
.col-4 {
  grid-column: span 4;
}
.col-8 {
  grid-column: span 8;
}
.col-12 {
  grid-column: span 12;
}
.p {
  padding: 18px;
}

.muted {
  color: var(--muted);
}
.tiny {
  font-size: 13px;
}

/* PROJECTS */
.project {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.project h3 {
  margin: 0;
  font-size: 18px;
}
.project .meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.pill {
  font-size: 12px;
  color: var(--brand);
  padding: 6px 9px;
  border-radius: 999px;
  background: rgba(74, 127, 255, 0.1);
  border: 1px solid rgba(74, 127, 255, 0.2);
}
.project .links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 4px;
}
.link {
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--soft);
  color: var(--text);
  font-size: 13px;
}
.link:hover {
  background: var(--card);
  box-shadow: var(--shadow);
}

.highlights-card {
  min-width: 320px;
}

/* Helper classes for cleaner HTML */
.hero-hint {
  margin: 12px 0 0;
  text-align: center;
}

.about-text {
  margin-top: 0;
}

.highlights-title {
  margin-top: 0;
}

.highlights-list {
  margin: 0;
  padding-left: 18px;
}

.skill-title {
  margin-top: 0;
}

.contact-intro {
  margin-top: 0;
}

/* SKILLS */
.skills {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* FOOTER */
footer {
  padding: 28px 0 40px;
  color: var(--muted);
  border-top: 1px solid var(--border);
  margin-top: 18px;
}

/* GITHUB ACTIVITY */
.github-card {
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  min-height: 180px;
}

.github-card img {
  width: 100%;
  height: auto;
  max-width: 500px;
}

.github-card .contribution-graph {
  max-width: 100%;
  border-radius: 8px;
}

/* CONTACT INFO */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  transition:
    transform 0.2s,
    background 0.2s;
}

.contact-item:hover {
  transform: translateX(4px);
  background: rgba(255, 255, 255, 0.08);
}

.contact-icon {
  font-size: 24px;
}

.contact-detail {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.contact-label {
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.contact-value {
  font-size: 15px;
  color: var(--text);
}

/* VIEW DETAILS BUTTON */
.view-project-btn {
  padding: 10px 16px;
  border: 1px solid var(--brand);
  border-radius: 12px;
  background: transparent;
  color: var(--brand);
  font-size: 14px;
  cursor: pointer;
  transition:
    0.2s background,
    0.2s color;
  margin-top: auto;
}

.view-project-btn:hover {
  background: var(--brand);
  color: #fff;
}

/* PROJECT MODAL */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transition:
    0.3s opacity,
    0.3s visibility;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow);
  transform: scale(0.9);
  transition: 0.3s transform;
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text);
  font-size: 24px;
  cursor: pointer;
  transition: 0.2s background;
  z-index: 10;
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.modal-gallery {
  position: relative;
}

.modal-gallery img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius) var(--radius) 0 0;
  transition: opacity 0.15s;
}

.gallery-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.5);
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: 0.2s background;
}

.gallery-arrow:hover {
  background: rgba(0, 0, 0, 0.8);
}

.gallery-prev {
  left: 12px;
}

.gallery-next {
  right: 12px;
}

.gallery-counter {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 13px;
}

.modal-content {
  padding: 24px;
}

.modal-content h3 {
  margin: 0 0 12px;
  font-size: 22px;
}

.modal-content .muted {
  margin: 0 0 16px;
  line-height: 1.6;
}

.modal-content .meta {
  margin-bottom: 16px;
}

.modal-content .links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* Modal Link Buttons with Icons */
.modal-content .link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
}

.modal-content .link.repo-link {
  background: var(--soft);
  color: var(--text);
  border: 1px solid var(--border);
}

.modal-content .link.repo-link:hover {
  background: var(--card);
  box-shadow: var(--shadow);
}

.modal-content .link.page-link {
  background: var(--brand);
  color: #fff;
  border: 1px solid var(--brand);
}

.modal-content .link.page-link:hover {
  background: #3a6fee;
  box-shadow: 0 4px 15px rgba(74, 127, 255, 0.4);
}

.link-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.external-icon {
  width: 12px;
  height: 12px;
  opacity: 0.7;
}

/* GITHUB ACTIVITY */
.github-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contribution-graph {
  width: 100%;
  height: auto;
  border-radius: 8px;
}

.github-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.github-contrib-text {
  font-size: 13px;
  color: var(--muted);
}

.github-contrib-text #contribCount {
  font-weight: 600;
  color: var(--text);
}

.github-legend {
  display: flex;
  align-items: center;
  gap: 6px;
}

.legend-label {
  font-size: 12px;
  color: var(--muted);
}

.legend-squares {
  display: flex;
  gap: 3px;
}

.legend-sq {
  width: 12px;
  height: 12px;
  border-radius: 2px;
}

.legend-sq-1 {
  background: #ebedf0;
}
.legend-sq-2 {
  background: #c6d9f1;
}
.legend-sq-3 {
  background: #7aa2ff;
}
.legend-sq-4 {
  background: #4a7fff;
}
.legend-sq-5 {
  background: #2563eb;
}

[data-theme="dark"] .legend-sq-1 {
  background: #161b22;
}
[data-theme="dark"] .legend-sq-2 {
  background: #1e3a5f;
}
[data-theme="dark"] .legend-sq-3 {
  background: #3d6cb3;
}
[data-theme="dark"] .legend-sq-4 {
  background: #4a7fff;
}
[data-theme="dark"] .legend-sq-5 {
  background: #7aa2ff;
}

.certificate-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 0;
  transition:
    transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    box-shadow 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  cursor: pointer;
}

.certificate-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow:
    0 25px 70px rgba(74, 127, 255, 0.25),
    0 8px 25px rgba(0, 0, 0, 0.15);
}

.cert-img-wrapper {
  width: 100%;
  aspect-ratio: 16 / 11;
  background: linear-gradient(
    135deg,
    var(--soft) 0%,
    rgba(74, 127, 255, 0.08) 100%
  );
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  position: relative;
}

.cert-img-wrapper::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    transparent 0%,
    transparent 60%,
    rgba(0, 0, 0, 0.4) 100%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 2;
}

.certificate-card:hover .cert-img-wrapper::before {
  opacity: 1;
}

.cert-img-wrapper::after {
  content: "Click to View";
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: rgba(255, 255, 255, 0.95);
  color: var(--text);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  opacity: 0;
  transition:
    opacity 0.3s ease,
    transform 0.3s ease;
  z-index: 3;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .cert-img-wrapper::after {
  background: rgba(17, 26, 51, 0.95);
  color: var(--text);
}

.certificate-card:hover .cert-img-wrapper::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.cert-placeholder {
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  position: relative;
  z-index: 1;
}

.cert-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition:
    transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    filter 0.3s ease;
}

.certificate-card:hover .cert-placeholder img {
  transform: scale(1.08);
  filter: brightness(1.05);
}

.cert-content {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex-grow: 1;
  background: linear-gradient(
    180deg,
    var(--card) 0%,
    rgba(74, 127, 255, 0.03) 100%
  );
}

.cert-content h3 {
  margin: 0;
  font-size: 15px;
  line-height: 1.4;
  font-weight: 600;
  transition: color 0.2s ease;
}

.certificate-card:hover .cert-content h3 {
  color: var(--brand);
}

.cert-content .muted {
  margin: 0;
  font-size: 13px;
}

.cert-meta {
  margin-top: auto;
  padding-top: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.cert-meta .pill {
  background: linear-gradient(
    135deg,
    rgba(74, 127, 255, 0.15) 0%,
    rgba(0, 184, 212, 0.1) 100%
  );
  border: 1px solid rgba(74, 127, 255, 0.25);
  font-weight: 500;
}

/* Certificate Lightbox */
.cert-lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.35s ease,
    visibility 0.35s ease;
  padding: 40px;
}

.cert-lightbox.active {
  opacity: 1;
  visibility: visible;
}

.cert-lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 85vh;
  transform: scale(0.85);
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.cert-lightbox.active .cert-lightbox-content {
  transform: scale(1);
}

.cert-lightbox-content img {
  max-width: 100%;
  max-height: 85vh;
  border-radius: 16px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
  display: block;
}

.cert-lightbox-close {
  position: absolute;
  top: -15px;
  right: -15px;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand2) 100%);
  color: #fff;
  font-size: 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
  box-shadow: 0 4px 20px rgba(74, 127, 255, 0.4);
}

.cert-lightbox-close:hover {
  transform: scale(1.1) rotate(90deg);
  box-shadow: 0 6px 25px rgba(74, 127, 255, 0.5);
}

.cert-lightbox-info {
  position: absolute;
  bottom: -60px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: 12px 24px;
  border-radius: 30px;
  color: #fff;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.cert-lightbox-info h4 {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 600;
}

.cert-lightbox-info p {
  margin: 0;
  font-size: 13px;
  opacity: 0.8;
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  h1 {
    font-size: 36px;
  }
  .col-6,
  .col-4,
  .col-8 {
    grid-column: span 12;
  }
  .nav-links {
    display: none;
  }
}

/* HERO: 3 columns on desktop */
.hero-grid {
  display: grid;
  grid-template-columns: 0.55fr 1.2fr 0.8fr; /* photo | main | side */
  gap: 18px;
  align-items: stretch;
}

/* Profile photo card */
.hero-photo {
  padding: 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* Avatar container */
.avatar {
  width: 190px;
  height: 190px;
  border-radius: 999px;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.4);
  background: rgba(255, 255, 255, 0.04);
  transform: translateZ(0);
  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease;
}

/* Soft glow ring */
.avatar::before {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: 999px;
  background: linear-gradient(
    135deg,
    rgba(122, 162, 255, 0.55),
    rgba(98, 230, 255, 0.45)
  );
  opacity: 0.35;
  filter: blur(10px);
  z-index: 0;
}

/* Image layers */
.avatar-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
  transition:
    opacity 0.28s ease,
    transform 0.28s ease,
    filter 0.28s ease;
}

/* Base image is visible */
.avatar-img.base {
  opacity: 1;
}

/* Hover image starts hidden */
.avatar-img.hover {
  opacity: 0;
  transform: scale(1.05);
}

/* Hover animation: swap images + tiny zoom */
.avatar:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 26px 80px rgba(0, 0, 0, 0.5);
}

.avatar:hover .avatar-img.base {
  opacity: 0;
  transform: scale(0.98);
  filter: saturate(0.95);
}

.avatar:hover .avatar-img.hover {
  opacity: 1;
  transform: scale(1);
}

/* Mobile: stack */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .avatar {
    width: 170px;
    height: 170px;
  }
  .hero-photo {
    order: 0;
  }
}