:root {
  --bg-gradient-start: #e5e9ff;
  --bg-gradient-end: #fbe5ff;
  --card-bg: #ffffff;
  --text-main: #111111;
  --text-muted: #555a64;
  --accent: #216cff;
  --border-subtle: #e4e7f1;
  --shadow-soft: 0 30px 80px rgba(16, 24, 40, 0.16);
  --radius-card: 32px;
  --radius-pill: 999px;
  --font-main: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Inter", "Segoe UI", sans-serif;
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-main);
  color: var(--text-main);
  background: linear-gradient(
    135deg,
    var(--bg-gradient-start),
    var(--bg-gradient-end)
  );
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 12px;
}

.page-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(
      circle at top left,
      rgba(255, 255, 255, 0.65),
      transparent 55%
    ),
    radial-gradient(
      circle at bottom right,
      rgba(255, 255, 255, 0.55),
      transparent 55%
    );
  z-index: -2;
}

.shell {
  width: 100%;
  max-width: 1200px;
  background: var(--card-bg);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
  padding: 28px 42px 32px;
  display: flex;
  flex-direction: column;
}

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 32px;
}

.brand-name {
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: 1.05rem;   /* was default, now slightly larger */
}
.nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 10px;
}

.nav-pill {
  padding: 8px 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.98rem;   /* bigger About / Projects / Contact text */
  color: var(--text-muted);
  text-decoration: none;
  background: transparent;
  transition: background 0.16s ease, color 0.16s ease, border-color 0.16s ease,
    box-shadow 0.16s ease;
}

.nav-pill:hover {
  background: rgba(15, 23, 42, 0.03);
  border-color: var(--border-subtle);
  color: var(--text-main);
}

.nav-pill.active {
  background: #f3f5ff;
  border-color: #d4dcff;
  color: var(--text-main);
  box-shadow: 0 0 0 1px rgba(153, 171, 255, 0.7);
}

.topbar-icons {
  display: flex;
  align-items: center;
  gap: 16px; /* a bit more space between icons */
}

.icon-button {
  width: 36px;              /* bigger touch area */
  height: 36px;
  border-radius: 0;         /* no pill */
  background: transparent;  /* no background */
  border: none;             /* no border */
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: none;
  transition: transform 0.16s ease, opacity 0.16s ease;
}

.icon-button img {
  width: 26px;              /* larger logo */
  height: 26px;
  object-fit: contain;
}

.icon-button:hover {
  transform: translateY(-1px);
  opacity: 0.8;             /* subtle hover feedback */
}


/* Sections */
main {
  width: 100%;
}

.section {
  padding: 40px 0;
  border-bottom: 1px solid rgba(228, 231, 241, 0.7);
}

.section:last-of-type {
  border-bottom: none;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 28px;
}

.section-header h3 {
  margin: 0 0 8px;
  font-size: 1.3rem;
  font-weight: 700;
}

.section-header p {
  margin: 0;
  font-size: 0.99rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Hero */
.hero {
  min-height: calc(100vh - 140px);
  padding: 40px 0 60px;
  border-bottom: 1px solid rgba(228, 231, 241, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-text {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.hero h1 {
  margin: 0 0 6px;
  font-size: clamp(2.2rem, 5vw, 3rem);
  font-weight: 800;
}

.hero h2 {
  margin: 0 0 12px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-muted);
}

.hero-body {
  margin: 0 0 20px;
  font-size: 0.98rem;
  line-height: 1.7;
  color: var(--text-muted);
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, box-shadow 0.18s ease,
    transform 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 10px 25px rgba(33, 108, 255, 0.45);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 40px rgba(33, 108, 255, 0.55);
}

.btn-secondary {
  background: #ffffff;
  color: var(--text-main);
  border-color: var(--border-subtle);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.06);
}

.btn-secondary:hover {
  background: #f7f8ff;
}

/* About / Tech row */
.about {
  padding-top: 40px;
}

.tech-block {
  text-align: center;
  margin: 32px auto 0;
  max-width: 900px;
}

.tech-block h4 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
}

.tech-icons {
  display: flex;
  justify-content: center;
  gap: 18px;
  margin-top: 18px;
  flex-wrap: nowrap;
  overflow-x: auto;
  padding-bottom: 6px;
}

.tech-icon-card {
  flex: 0 0 140px;      /* was 130px */
  width: 140px;
  height: 118px;        /* a touch taller */
  border-radius: 20px;
  background: #f5f7ff;
  border: 1px solid rgba(215, 221, 245, 0.9);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.04);
}

.tech-icon-card img {
  width: 38px;          /* was 34px */
  height: 38px;
  object-fit: contain;
}

.tech-icon-card span {
  font-size: 0.95rem;   /* was 0.9rem */
  color: var(--text-muted);
  font-weight: 500;
}


/* Projects */
.projects-grid {
  max-width: 990px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 18px;
}

.project-card {
  background: #f9f9ff;
  border-radius: 20px;
  padding: 18px 18px 16px;
  border: 1px solid rgba(226, 231, 255, 0.9);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.04);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.project-card-main {
  grid-row: span 2;
  padding: 24px 24px 20px;
  background: radial-gradient(circle at top left, #1c2e6b, #0b1027);
  color: #ffffff;
}

.project-card-main h4 {
  margin: 0 0 10px;
  font-size: 1.2rem;
}

.project-main-text p {
  margin: 0 0 14px;
  font-size: 0.95rem;
  line-height: 1.7;
  opacity: 0.92;
}

.project-card h5 {
  margin: 0;
  font-size: 0.98rem;
  font-weight: 600;
}

.project-card p {
  margin: 4px 0 6px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0 0 6px;
  padding: 0;
}

.project-tags li {
  font-size: 0.75rem;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: inherit;
}

.project-card:not(.project-card-main) .project-tags li {
  background: #ffffff;
  border-color: rgba(214, 219, 243, 0.9);
  color: #384156;
}

.project-link {
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.project-link::after {
  content: "↗";
  font-size: 0.8rem;
}

.project-link:hover {
  text-decoration: underline;
}

/* Contact */
.contact {
  text-align: center;
}

.contact-actions {
  margin: 10px 0 24px;
  display: flex;
  justify-content: center;
}

.contact-grid {
  display: flex;
  justify-content: center;  /* center the whole row */
  gap: 14px;
  max-width: 540px;
  margin: 0 auto;
}

.contact-card {
  background: #f9f9ff;
  border-radius: 18px;
  padding: 12px 18px;
  border: 1px solid rgba(226, 231, 255, 0.9);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  /* no text, so less gap needed */
  transition: background 0.16s ease, transform 0.16s ease,
    box-shadow 0.16s ease;
}

/* no wide variant needed any more */
.contact-card-wide {
  grid-column: auto;
}


.contact-card img.contact-icon {
  width: 26px;   /* slightly bigger */
  height: 26px;
  object-fit: contain;
}

.contact-card:hover {
  background: #eef1ff;
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.08);
}

/* Footer */
.footer {
  margin-top: 24px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Responsive */
@media (max-width: 960px) {
  .shell {
    padding: 22px 18px 24px;
    border-radius: 22px;
  }

  .topbar {
    flex-wrap: wrap;
    gap: 14px;
  }

  .nav ul {
    justify-content: center;
  }

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

  .project-card-main {
    grid-row: span 1;
  }
}

@media (max-width: 640px) {
  body {
    padding: 18px 8px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .topbar-icons {
    margin-left: auto;
  }

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

  .contact-card-wide {
    grid-column: span 1;
  }
}


@media (max-width: 640px) {
  .contact-grid {
    flex-direction: column;
  }
}