:root {
  color-scheme: dark;
  --bg: #0d1321;
  --bg-soft: #121c30;
  --surface: rgba(18, 28, 48, 0.72);
  --surface-strong: #16233b;
  --card-border: rgba(148, 163, 184, 0.18);
  --text: #f4f7fb;
  --text-muted: #9fb0c8;
  --heading: #ffffff;
  --primary: #67b7ff;
  --primary-strong: #3489d1;
  --accent: #7cf2d4;
  --shadow: 0 20px 60px rgba(3, 8, 20, 0.35);
  --section-pad: clamp(4.5rem, 8vw, 7rem);
  --radius-lg: 28px;
  --radius-md: 20px;
  --container: min(1120px, calc(100% - 2rem));
  --transition: 240ms ease;
}

body.light-mode {
  color-scheme: light;
  --bg: #f4f7fb;
  --bg-soft: #e7eef8;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #ffffff;
  --card-border: rgba(37, 60, 92, 0.12);
  --text: #142033;
  --text-muted: #54657e;
  --heading: #0d1729;
  --primary: #1e78c8;
  --primary-strong: #0f5d9f;
  --accent: #1ea889;
  --shadow: 0 18px 48px rgba(33, 54, 90, 0.14);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "DM Sans", sans-serif;
  color: var(--text);
  background:
    radial-gradient(
      circle at top left,
      rgba(103, 183, 255, 0.18),
      transparent 28%
    ),
    radial-gradient(
      circle at top right,
      rgba(124, 242, 212, 0.12),
      transparent 24%
    ),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
  line-height: 1.7;
  transition:
    background var(--transition),
    color var(--transition);
}

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

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

button,
input,
textarea {
  font: inherit;
}

.container {
  width: var(--container);
  margin: 0 auto;
}

.section {
  padding: var(--section-pad) 0;
}

.section-heading {
  margin-bottom: 2rem;
}

.section-heading h2,
.hero h1,
.content-card h3,
.timeline-card h3,
.cert-content h3,
.project-card h3 {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  color: var(--heading);
  letter-spacing: -0.03em;
}

.section-heading h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

.eyebrow {
  margin: 0 0 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 1rem;
  background: var(--surface-strong);
  color: var(--text);
  padding: 0.8rem 1rem;
  border-radius: 999px;
  z-index: 1000;
}

.skip-link:focus {
  left: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(8, 14, 26, 0.55);
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
}

body.light-mode .site-header {
  background: rgba(244, 247, 251, 0.72);
}

.navbar {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  font-weight: 700;
}

.brand-mark {
  width: 2.8rem;
  height: 2.8rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #04111e;
  font-family: "Space Grotesk", sans-serif;
  box-shadow: var(--shadow);
}

.nav-panel {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-links,
.footer-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin: 0;
  padding: 0;
}

.nav-link {
  position: relative;
  color: var(--text-muted);
  transition: color var(--transition);
}

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

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.45rem;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

.nav-toggle,
.theme-toggle {
  border: 0;
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

.nav-toggle {
  display: none;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 0.9rem;
  padding: 0.65rem;
  flex-direction: column;
  justify-content: space-between;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 999px;
  background: var(--heading);
  transition:
    transform var(--transition),
    opacity var(--transition);
}

.theme-toggle {
  width: 2.9rem;
  height: 2.9rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--card-border);
  color: var(--heading);
  position: relative;
  overflow: hidden;
}

.theme-toggle-mobile {
  display: none;
}

.theme-icon {
  position: absolute;
  display: grid;
  place-items: center;
  font-size: 1.15rem;
  line-height: 1;
  transition:
    transform var(--transition),
    opacity var(--transition);
}

.theme-icon-light {
  opacity: 0;
  transform: translateY(150%);
}

body.light-mode .theme-icon-dark {
  opacity: 0;
  transform: translateY(-150%);
}

body.light-mode .theme-icon-light {
  opacity: 1;
  transform: translateY(0);
}

.hero {
  padding-top: calc(var(--section-pad) + 1.5rem);
}

.hero-grid,
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

@media (min-width: 961px) {
  .hero-grid {
    grid-template-columns: minmax(320px, 440px) minmax(0, 1fr);
  }

  .hero-copy {
    order: 2;
  }

  .hero-visual {
    order: 1;
    justify-self: start;
  }

  .hero-visual .profile-frame {
    margin-inline: 0;
  }
}

.hero-copy h1 {
  font-size: clamp(3rem, 8vw, 5.5rem);
  line-height: 0.96;
  margin-bottom: 1rem;
}

.hero-text {
  max-width: 640px;
  font-size: 1.06rem;
  color: var(--text-muted);
}

.hero-actions {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.3rem;
  padding: 0.85rem 1.4rem;
  border-radius: 999px;
  font-weight: 700;
  border: 1px solid transparent;
  cursor: pointer;
  transition:
    transform var(--transition),
    background var(--transition),
    border-color var(--transition),
    color var(--transition),
    box-shadow var(--transition);
}

.btn:disabled {
  cursor: not-allowed;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #04111e;
  box-shadow: var(--shadow);
}

.btn-secondary {
  background: var(--surface);
  border-color: var(--card-border);
}

.btn-ghost {
  border-color: rgba(148, 163, 184, 0.2);
  color: var(--heading);
}

.full-width {
  width: 100%;
}

.hero-visual {
  position: relative;
}

.profile-frame {
  width: min(420px, 100%);
  aspect-ratio: 1;
  padding: 1rem;
  margin-inline: auto;
  border-radius: 50%;
  background:
    linear-gradient(135deg, rgba(103, 183, 255, 0.6), rgba(124, 242, 212, 0.4)),
    var(--surface);
  box-shadow: var(--shadow);
}

.profile-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid rgba(255, 255, 255, 0.08);
}

.hero-card,
.content-card,
.timeline-card,
.cert-card,
.project-card,
.skill-card,
.contact-form {
  background: var(--surface);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero-card {
  position: absolute;
  right: 0;
  bottom: 10%;
  min-width: 220px;
  padding: 1rem 1.2rem;
  border-radius: var(--radius-md);
}

.hero-card span {
  display: block;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.hero-card strong {
  color: var(--heading);
}

.floating-card {
  animation: floatCard 5s ease-in-out infinite;
}

@keyframes floatCard {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.about-card,
.education-card,
.contact-copy {
  padding: 2rem;
  border-radius: var(--radius-lg);
}

.skills-grid,
.cert-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.3rem;
}

.skill-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 10px;
  transition: 0.3s;
}

.skill-card:hover,
.timeline-card:hover,
.cert-card:hover,
.project-card:hover,
.content-card:hover,
.contact-form:hover {
  transform: translateY(-6px);
  border-color: rgba(103, 183, 255, 0.4);
}

.skill-card i {
  font-size: 1.75rem;
  color: var(--accent);
  margin-bottom: 8px;
}

.skill-card span {
  font-weight: 700;
  color: var(--heading);
}

.timeline {
  display: grid;
  gap: 1.4rem;
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 1.1rem;
  top: 1rem;
  bottom: 1rem;
  width: 2px;
  background: linear-gradient(180deg, var(--primary), transparent);
}

.timeline-card {
  position: relative;
  margin-left: 2.4rem;
  padding: 1.6rem;
  border-radius: var(--radius-lg);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.15rem;
  align-items: start;
}

.timeline-card::before {
  content: "";
  position: absolute;
  left: -1.95rem;
  top: 1.8rem;
  width: 0.95rem;
  height: 0.95rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 0 0 8px rgba(103, 183, 255, 0.08);
}

.timeline-date,
.education-meta,
.inline-link,
.form-status {
  color: var(--text-muted);
}

.timeline-card-icon,
.education-card-icon {
  width: 3.35rem;
  height: 3.35rem;
  display: grid;
  place-items: center;
  border-radius: 1rem;
  background: linear-gradient(135deg, rgba(103, 183, 255, 0.16), rgba(30, 168, 137, 0.16));
  border: 1px solid rgba(103, 183, 255, 0.2);
  color: var(--accent);
  font-size: 1.3rem;
  flex-shrink: 0;
}

.timeline-card-icon svg,
.education-card-icon svg {
  width: 1.5rem;
  height: 1.5rem;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.timeline-card-content {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
}

.timeline-date {
  display: block;
  font-size: 0.98rem;
  font-weight: 500;
  margin-bottom: 0.15rem;
}

.timeline-card h3 {
  margin: 0;
  font-size: clamp(1.7rem, 2vw, 2.15rem);
  line-height: 1.1;
}

.timeline-card h3.company-infosys {
  color: #0072ce !important;
}

.timeline-card h3.company-cgi {
  color: #e31937 !important;
}

.timeline-role {
  margin: 0;
  color: var(--heading);
  font-size: 1.08rem;
  line-height: 1.35;
}

.education-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  margin-top: 0.45rem;
  font-weight: 500;
}

.education-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.3rem;
  align-items: start;
}

.education-content {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.education-card h3 {
  margin: 0;
  font-size: clamp(1.45rem, 2.2vw, 1.9rem);
  line-height: 1.2;
}

.education-school {
  margin: 0;
  color: var(--heading);
  font-size: 1.02rem;
}

.cert-card,
.project-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.cert-preview {
  min-height: 180px;
  display: grid;
  place-items: center;
  gap: 0.7rem;
  text-align: center;
  padding: 1.4rem;
  background:
    linear-gradient(
      135deg,
      rgba(103, 183, 255, 0.14),
      rgba(124, 242, 212, 0.12)
    ),
    rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--card-border);
}

.cert-preview i {
  font-size: 2rem;
  color: var(--primary);
}

.cert-content,
.project-card {
  padding: 1.5rem;
}

.project-card {
  min-height: 250px;
}

.project-glow {
  position: absolute;
  inset: auto -20% -35% auto;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(103, 183, 255, 0.2),
    transparent 65%
  );
  pointer-events: none;
}

.project-links,
.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.inline-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 700;
  transition: color var(--transition);
}

.inline-link:hover,
.footer-links a:hover,
.social-links a:hover {
  color: var(--primary);
}

.social-links {
  margin-top: 1.5rem;
}

.social-links a {
  width: auto;
  height: auto;
  display: grid;
  place-items: center;
  padding: 0.2rem;
  border-radius: 0;
  background: transparent;
  border: 0;
  font-size: 1.15rem;
  transition:
    transform var(--transition),
    color var(--transition);
}

.social-link {
  color: var(--heading);
}

.social-instagram {
  color: #e1306c;
}

.social-whatsapp {
  color: #25d366;
}

.social-linkedin {
  color: #0a66c2;
}

.social-links a.social-link:hover {
  transform: translateY(-3px) scale(1.05);
}

.social-icon {
  width: 2rem;
  height: 2rem;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.contact-form {
  padding: 2rem;
  border-radius: var(--radius-lg);
}

.form-group {
  margin-bottom: 1.1rem;
}

.hidden-field {
  display: none;
}

.form-snackbar {
  position: fixed;
  left: 50%;
  bottom: 1.5rem;
  z-index: 200;
  min-width: min(92vw, 360px);
  max-width: 92vw;
  padding: 0.95rem 1.2rem;
  border-radius: 18px;
  background: rgba(12, 22, 38, 0.92);
  color: #ffffff;
  border: 1px solid rgba(103, 183, 255, 0.28);
  box-shadow: 0 20px 60px rgba(3, 8, 20, 0.28);
  backdrop-filter: blur(14px);
  transform: translate(-50%, 140%);
  opacity: 0;
  pointer-events: none;
  transition:
    transform 260ms ease,
    opacity 260ms ease;
}

body.light-mode .form-snackbar {
  background: rgba(16, 24, 40, 0.92);
  color: #ffffff;
}

.form-snackbar.show {
  transform: translate(-50%, 0);
  opacity: 1;
}

.form-snackbar.success {
  border-color: rgba(34, 197, 94, 0.4);
}

.form-snackbar.error {
  border-color: rgba(239, 68, 68, 0.4);
}

.form-group label {
  display: block;
  margin-bottom: 0.45rem;
  font-weight: 700;
  color: var(--heading);
}

.form-group input,
.form-group textarea {
  width: 100%;
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 0.95rem 1rem;
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
  transition:
    border-color var(--transition),
    box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: rgba(103, 183, 255, 0.55);
  box-shadow: 0 0 0 4px rgba(103, 183, 255, 0.12);
}

.error-message {
  display: block;
  min-height: 1rem;
  margin-top: 0.4rem;
  color: #ff9c9c;
  font-size: 0.88rem;
}

.site-footer {
  padding: 1.7rem 0 2.4rem;
  border-top: 1px solid rgba(148, 163, 184, 0.12);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 700ms ease,
    transform 700ms ease;
}

.reveal-left {
  transform: translateX(-36px);
}

.reveal-right {
  transform: translateX(36px);
}

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

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 960px) {
  .hero-grid,
  .contact-grid,
  .skills-grid,
  .cert-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy,
  .hero-visual {
    text-align: center;
  }

  .education-card {
    grid-template-columns: auto 1fr;
    gap: 1rem;
  }

  .education-card-icon {
    margin-inline: 0;
  }

  .hero-visual {
    order: 1;
  }

  .hero-copy {
    order: 2;
  }

  .hero-actions,
  .project-links,
  .social-links {
    justify-content: center;
  }

  .hero-card {
    position: static;
    margin-top: 1.2rem;
  }

  .brand-text {
    display: none;
  }
}

@media (max-width: 820px) {
  .navbar {
    justify-content: flex-start;
    gap: 0.75rem;
  }

  .nav-panel {
    margin-left: 0;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .theme-toggle-mobile {
    display: grid;
  }

  .nav-panel .theme-toggle {
    display: none;
  }

  .nav-panel {
    position: absolute;
    top: calc(100% + 0.8rem);
    right: 1rem;
    width: min(320px, calc(100vw - 2rem));
    padding: 1rem;
    border-radius: 22px;
    background: var(--surface-strong);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow);
    flex-direction: column;
    align-items: stretch;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
    transition:
      opacity var(--transition),
      transform var(--transition);
  }

  .nav-panel.open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.9rem;
  }

  .theme-toggle {
    margin-top: 0.5rem;
  }

  .nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .footer-content {
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .section {
    padding: 4rem 0;
  }

  .hero-copy h1 {
    font-size: 2.8rem;
  }

  .btn {
    width: 100%;
  }

  .timeline-card {
    margin-left: 1.9rem;
    grid-template-columns: auto 1fr;
    gap: 0.9rem;
  }

  .timeline::before {
    left: 0.85rem;
  }

  .timeline-card::before {
    left: -1.45rem;
  }

  .timeline-card-icon {
    width: 3rem;
    height: 3rem;
  }

  .education-card {
    grid-template-columns: auto 1fr;
    gap: 0.9rem;
  }

  .education-card-icon {
    width: 3rem;
    height: 3rem;
  }
}