/* ============================================================
   COMPONENTS CSS — Prashant Pandey
   Nav · Header · Footer · Search · Skills · Stats
   ============================================================ */

/* ===================== NAVIGATION ===================== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 200;
  display: flex;
  align-items: center;
  transition: all var(--transition-base);
}
.nav.scrolled {
  background: rgba(7,7,15,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.nav__inner {
  width: 100%;
  max-width: var(--max-w-full);
  margin-inline: auto;
  padding-inline: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-8);
}
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}
.nav__logo-mark {
  width: 34px; height: 34px;
  border-radius: var(--radius-md);
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
  box-shadow: 0 2px 12px rgba(99,102,241,0.4);
}
.nav__logo-text {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}
.nav__logo-sub {
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--text-muted);
  display: block;
  letter-spacing: 0.04em;
}
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: auto;
}
.nav__link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
  position: relative;
}
.nav__link:hover, .nav__link.active {
  color: var(--text-primary);
  background: rgba(255,255,255,0.06);
}
.nav__link.active::after {
  content: '';
  position: absolute;
  bottom: 2px; left: 50%;
  transform: translateX(-50%);
  width: 16px; height: 2px;
  background: var(--gradient);
  border-radius: 2px;
}
.nav__cta {
  margin-left: var(--space-3);
  padding: var(--space-2) var(--space-4);
  background: var(--gradient);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  box-shadow: 0 2px 12px rgba(99,102,241,0.3);
  transition: all var(--transition-base);
}
.nav__cta:hover { color: #fff; transform: translateY(-1px); box-shadow: 0 4px 20px rgba(99,102,241,0.5); }

/* Mobile nav toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  cursor: pointer;
  margin-left: auto;
  padding: 4px;
}
.nav__toggle span {
  display: block;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
  transform-origin: center;
}
.nav__toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav__toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-h); left: 0; right: 0;
  background: rgba(7,7,15,0.97);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: var(--space-5) var(--space-6);
  flex-direction: column;
  gap: var(--space-2);
  z-index: 199;
  max-height: calc(100vh - var(--nav-h));
  overflow-y: auto;
}
.nav__mobile.open { display: flex; }
.nav__mobile .nav__link {
  font-size: 1rem;
  padding: var(--space-3) var(--space-4);
}

@media (max-width: 900px) {
  .nav__links { display: none; }
  .nav__toggle { display: flex; }
  .nav__inner {
    padding-inline: var(--space-4);
    gap: var(--space-4);
  }
}

/* ===================== FOOTER ===================== */
.footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding-block: var(--space-16) var(--space-8);
  margin-top: auto;
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}
.footer__brand p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-top: var(--space-4);
  max-width: 260px;
}
.footer__social {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-5);
}
.footer__social-link {
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 700;
  transition: all var(--transition-fast);
}
.footer__social-link:hover {
  background: rgba(99,102,241,0.12);
  border-color: var(--accent-1);
  color: var(--accent-1);
}
.footer__col h4 {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-4);
}
.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer__links a {
  font-size: 0.88rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.footer__links a:hover { color: var(--text-primary); }
.footer__bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer__copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.footer__bottom-links {
  display: flex;
  gap: var(--space-5);
}
.footer__bottom-links a {
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}
.footer__bottom-links a:hover { color: var(--accent-1); }
@media (max-width: 900px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .footer__grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .footer__bottom { flex-direction: column; text-align: center; }
  /* Stack update-item date above content on mobile */
  .update-item { grid-template-columns: 1fr; gap: var(--space-2); }
  .update-date { padding-top: 0; }
}

/* ===================== HERO ===================== */
.hero {
  position: relative;
  padding-block: var(--space-24) var(--space-20);
  overflow: hidden;
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-teal);
  margin-bottom: var(--space-6);
}
.hero__eyebrow::before {
  content: '';
  width: 24px; height: 2px;
  background: var(--accent-teal);
  border-radius: 2px;
}
.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: var(--space-6);
}
.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 580px;
  margin-bottom: var(--space-10);
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-12);
}
.hero__stat-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
  padding-top: var(--space-10);
  border-top: 1px solid var(--border);
}
.hero__stat-number {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: var(--space-1);
}
.hero__stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ===================== SKILL PILLS ===================== */
.skill-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.skill-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}
.skill-pill:hover {
  border-color: var(--accent-1);
  color: var(--text-primary);
  background: rgba(99,102,241,0.08);
}
.skill-pill .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent-1);
  flex-shrink: 0;
}
.skill-pill .dot--teal   { background: var(--accent-teal); }
.skill-pill .dot--amber  { background: var(--accent-amber); }
.skill-pill .dot--violet { background: var(--accent-2); }

/* ===================== PROJECT CARD ===================== */
.project-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  height: 100%;
}
.project-card__icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}
.project-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}
.project-card__links {
  display: flex;
  gap: var(--space-2);
}
.project-card__link {
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}
.project-card__link:hover {
  border-color: var(--accent-1);
  color: var(--accent-1);
}
.project-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}
.project-card__desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex-grow: 1;
}
.project-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: auto;
}
.tech-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 2px 8px;
  background: rgba(99,102,241,0.1);
  color: #a5b4fc;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(99,102,241,0.2);
  font-weight: 500;
}

/* ===================== INDEX PAGE FILTERS ===================== */
.filter-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-10);
}
.filter-btn {
  font-size: 0.8rem;
  font-weight: 600;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  background: var(--bg-elevated);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.filter-btn:hover, .filter-btn.active {
  background: rgba(99,102,241,0.12);
  border-color: var(--accent-1);
  color: #a5b4fc;
}

/* ===================== PAGE HEADER ===================== */
.page-hero {
  padding-block: var(--space-16) var(--space-10);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.page-hero__label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-1);
  margin-bottom: var(--space-4);
  display: block;
}
.page-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-5);
}
.page-hero__desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.75;
}

/* ===================== SEARCH BAR ===================== */
.search-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-5);
  transition: all var(--transition-fast);
}
.search-bar:focus-within {
  border-color: var(--accent-1);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}
.search-bar input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  font-size: 0.95rem;
  color: var(--text-primary);
}
.search-bar input::placeholder { color: var(--text-muted); }
.search-bar__icon { color: var(--text-muted); font-size: 1rem; }

/* ===================== UPDATE ITEM ===================== */
.update-item {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: var(--space-5);
  padding-block: var(--space-5);
  border-bottom: 1px solid var(--border);
  align-items: start;
}
.update-item:last-child { border-bottom: none; }
.update-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  padding-top: 3px;
}
.update-body {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
}
.update-body a { color: var(--accent-1); }
.update-body strong { color: var(--text-primary); font-weight: 600; }

/* ===================== CONTACT FORM ===================== */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.form-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}
.form-input, .form-textarea {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: 0.92rem;
  color: var(--text-primary);
  outline: none;
  transition: all var(--transition-fast);
  width: 100%;
}
.form-input:focus, .form-textarea:focus {
  border-color: var(--accent-1);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--text-muted); }
.form-textarea { resize: vertical; min-height: 140px; line-height: 1.65; }

/* ===================== 404 PAGE ===================== */
.not-found {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-8);
}
.not-found__code {
  font-family: var(--font-display);
  font-size: clamp(6rem, 15vw, 12rem);
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: var(--space-4);
}
.not-found__title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-4);
}
.not-found__desc {
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
  max-width: 380px;
  margin-inline: auto;
}
.not-found__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

/* ===================== ANIMATIONS ===================== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(99,102,241,0.15); }
  50%       { box-shadow: 0 0 40px rgba(99,102,241,0.35); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}
@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
.animate-fade-up  { animation: fadeInUp 0.6s ease forwards; }
.animate-fade     { animation: fadeIn 0.5s ease forwards; }
.animate-delay-1  { animation-delay: 0.1s; opacity: 0; }
.animate-delay-2  { animation-delay: 0.2s; opacity: 0; }
.animate-delay-3  { animation-delay: 0.3s; opacity: 0; }
.animate-delay-4  { animation-delay: 0.4s; opacity: 0; }
.float-anim       { animation: float 4s ease-in-out infinite; }

/* ===================== MISC UTILITIES ===================== */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.flex         { display: flex; }
.flex-col     { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2        { gap: var(--space-2); }
.gap-3        { gap: var(--space-3); }
.gap-4        { gap: var(--space-4); }
.gap-6        { gap: var(--space-6); }
.w-full       { width: 100%; }
.mt-4         { margin-top: var(--space-4); }
.mt-8         { margin-top: var(--space-8); }
.mt-12        { margin-top: var(--space-12); }
.mb-4         { margin-bottom: var(--space-4); }
.mb-6         { margin-bottom: var(--space-6); }
.mb-8         { margin-bottom: var(--space-8); }
.p-6          { padding: var(--space-6); }
.rounded-full { border-radius: var(--radius-full); }
.hidden       { display: none; }
.relative     { position: relative; }
.overflow-hidden { overflow: hidden; }
.z-10         { z-index: 10; }