/* ===========================================
   NEURAL VAULT — Surgical Spectrum Design
   (Stitch-designed: Light, premium, editorial)
   =========================================== */

@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700;800&family=Nunito:wght@300;400;600;700&display=swap");

*, *::before, *::after {
  margin: 0; padding: 0;
  box-sizing: border-box;
  text-decoration: none;
  outline: none;
  border: none;
}

html {
  font-size: 62.5%;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: "Poppins", sans-serif;
  background: #f7f7f7;
  color: #1a1c1c;
  overflow-x: hidden;
}

/* ---- SCROLLBAR ---- */
::-webkit-scrollbar { width: 6px; height: 3px; }
::-webkit-scrollbar-track { background: #f3f3f3; }
::-webkit-scrollbar-thumb { background: #fc8c05; border-radius: 3px; }

/* ======================== HEADER ======================== */
.vault-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.6rem 6%;
  background: rgba(249, 249, 249, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

.vault-logo {
  font-size: 2rem;
  font-weight: 800;
  color: #fc8c05;
  letter-spacing: -0.02em;
  text-transform: lowercase;
}

.vault-nav {
  display: flex;
  gap: 2.8rem;
  align-items: center;
}

.vault-nav a {
  font-size: 1.4rem;
  font-weight: 600;
  color: #1a1c1c;
  text-transform: capitalize;
  position: relative;
  padding-bottom: 3px;
  transition: color 0.2s ease;
}

.vault-nav a::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  background: #fc8c05;
  transition: width 0.25s ease;
}

.vault-nav a:hover::after,
.vault-nav a.active::after { width: 100%; }
.vault-nav a.active { color: #fc8c05; }

.vault-hamburger {
  display: none;
  font-size: 2.4rem;
  color: #1a1c1c;
  cursor: pointer;
}

/* ======================== HERO ======================== */
.vault-hero {
  min-height: 55vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14rem 9% 6rem;
  background: linear-gradient(155deg, #f7f7f7 0%, #eef0ff 100%);
  position: relative;
  overflow: hidden;
  text-align: center;
}

/* Dot-grid blueprint overlay */
.vault-hero-dots {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(1,26,255,0.07) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

.vault-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 85rem;
}

.vault-hero-overline {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 2rem;
}

.vault-shield-badge {
  width: 3.6rem; height: 3.6rem;
  border-radius: 50%;
  background: #fc8c05;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-size: 1.6rem;
}

.vault-hero-overline-text {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: #564334;
  text-transform: uppercase;
  font-family: "Nunito", sans-serif;
}

.vault-hero-heading {
  font-size: clamp(4.5rem, 7vw, 7.5rem);
  font-weight: 800;
  color: #1a1c1c;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 2rem;
  text-transform: none;
}

.vault-hero-heading span {
  background: linear-gradient(135deg, #fc8c05, #011aff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.vault-hero-sub {
  font-size: 1.6rem;
  color: #564334;
  font-family: "Nunito", sans-serif;
  font-weight: 400;
  line-height: 1.7;
  max-width: 70rem;
  margin: 0 auto 4rem;
  text-transform: none;
}

.vault-hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3rem;
}

.vault-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.vault-stat strong {
  font-size: 3.2rem;
  font-weight: 800;
  color: #1a1c1c;
  letter-spacing: -0.03em;
  line-height: 1;
}

.vault-stat span {
  font-size: 1.2rem;
  font-family: "Nunito", sans-serif;
  font-weight: 600;
  color: #897362;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 4px;
}

.vault-stat-divider {
  width: 1px;
  height: 3.5rem;
  background: rgba(0,0,0,0.12);
}

/* ======================== FILTER BAR ======================== */
.vault-filter-bar {
  position: sticky;
  top: 6.4rem;
  z-index: 900;
  background: rgba(249,249,249,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  padding: 1rem 6%;
}

.vault-filter-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.vault-filter-pill {
  font-size: 1.3rem;
  font-weight: 700;
  font-family: "Nunito", sans-serif;
  padding: 0.5rem 1.8rem;
  border-radius: 3rem;
  border: 2px solid transparent;
  background: transparent;
  color: #564334;
  cursor: pointer;
  text-transform: capitalize;
  transition: all 0.2s ease;
}

.vault-filter-pill:hover {
  color: #fc8c05;
  border-color: rgba(252,140,5,0.4);
}

.vault-filter-pill.active {
  background: #fc8c05;
  color: #fff;
  border-color: #fc8c05;
}

.vault-filter-count {
  margin-left: auto;
  font-size: 1.2rem;
  font-family: "Nunito", sans-serif;
  color: #897362;
  font-weight: 600;
}

/* ======================== MAIN ROWS ======================== */
.vault-main {
  padding: 5rem 6% 6rem;
  display: flex;
  flex-direction: column;
  gap: 5rem;
  background: #f7f7f7;
}

.vault-row { position: relative; }

.vault-row.row-hidden { display: none; }

/* Row label */
.vault-row-label {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  color: #1a1c1c;
  text-transform: uppercase;
  font-family: "Nunito", sans-serif;
  margin-bottom: 2rem;
}

.vault-row-label-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.vault-dot--orange { background: #fc8c05; }
.vault-dot--amber  { background: #ff9900; }
.vault-dot--purple { background: #420177; }

/* Scrollable row */
.vault-row-scroll {
  display: flex;
  gap: 2.4rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 2rem;
  -webkit-overflow-scrolling: touch;
}

.vault-row-scroll::-webkit-scrollbar { height: 3px; }
.vault-row-scroll::-webkit-scrollbar-thumb { background: #fc8c05; border-radius: 2px; }

/* ======================== CREDENTIAL CARDS ======================== */
.vault-card {
  flex: 0 0 400px;
  background: #ffffff;
  border-radius: 1.4rem;
  padding: 2.8rem 2.6rem 2.4rem 3.2rem;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  scroll-snap-align: start;
  box-shadow: 0 4px 18px rgba(26,28,28,0.06);
  transition: transform 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275),
              box-shadow 0.35s ease;
}

/* Left strip — ML-Pulse breathing */
.vault-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px; height: 100%;
  border-radius: 1.4rem 0 0 1.4rem;
  animation: ml-pulse-vault 3s ease-in-out infinite alternate;
}

@keyframes ml-pulse-vault {
  0%   { opacity: 1; }
  100% { opacity: 0.5; }
}

/* Shimmer sweep on hover */
.vault-card::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 60%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.65), transparent);
  transition: left 0.5s ease;
  pointer-events: none;
}

.vault-card:hover::after { left: 150%; }

.vault-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 44px rgba(26,28,28,0.09);
}

/* Strip colors */
.vault-card--orange::before { background: #fc8c05; box-shadow: 2px 0 8px rgba(252,140,5,0.3); }
.vault-card--blue::before   { background: #011aff; box-shadow: 2px 0 8px rgba(1,26,255,0.2); }
.vault-card--purple::before { background: #420177; box-shadow: 2px 0 8px rgba(66,1,119,0.2); }

/* Hidden via filter */
.vault-card.vault-hidden { display: none !important; }

/* Card header */
.vault-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
}

/* Issuer badge */
.vault-issuer-badge {
  width: 5rem; height: 5rem;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem;
  font-weight: 800;
  transition: box-shadow 0.3s ease;
}

.vault-badge--google     { background: rgba(66,133,244,0.1); color: #4285f4; border: 1.5px solid rgba(66,133,244,0.2); }
.vault-badge--aws        { background: rgba(255,153,0,0.1);  color: #ff9900; border: 1.5px solid rgba(255,153,0,0.25); }
.vault-badge--ibm        { background: rgba(15,98,254,0.1);  color: #0f62fe; border: 1.5px solid rgba(15,98,254,0.2); font-size: 1.35rem; }
.vault-badge--springboard{ background: rgba(252,140,5,0.1);  color: #fc8c05; border: 1.5px solid rgba(252,140,5,0.25); }
.vault-badge--firebase   { background: rgba(255,100,0,0.1);  color: #f57c00; border: 1.5px solid rgba(255,100,0,0.2); }

.vault-card:hover .vault-badge--google { box-shadow: 0 0 18px rgba(66,133,244,0.35); }
.vault-card:hover .vault-badge--aws    { box-shadow: 0 0 18px rgba(255,153,0,0.35); }
.vault-card:hover .vault-badge--ibm    { box-shadow: 0 0 18px rgba(15,98,254,0.35); }
.vault-card:hover .vault-badge--firebase { box-shadow: 0 0 18px rgba(255,100,0,0.35); }

/* Card meta */
.vault-card-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
}

.vault-year {
  font-size: 1.15rem;
  font-family: "Nunito", sans-serif;
  font-weight: 700;
  color: #897362;
}

.vault-verified {
  font-size: 1.05rem;
  font-family: "Nunito", sans-serif;
  font-weight: 700;
  color: #1b6b3a;
  background: rgba(27,107,58,0.09);
  border: 1px solid rgba(27,107,58,0.18);
  padding: 0.2rem 1rem;
  border-radius: 3rem;
  text-transform: none;
}

/* Title */
.vault-card-title {
  font-size: 1.85rem;
  font-weight: 700;
  color: #1a1c1c;
  line-height: 1.3;
  margin-bottom: 1.1rem;
  letter-spacing: -0.01em;
  text-transform: none;
}

/* Description */
.vault-card-desc {
  font-size: 1.3rem;
  color: #564334;
  font-family: "Nunito", sans-serif;
  font-weight: 400;
  line-height: 1.65;
  margin-bottom: 1.8rem;
  text-transform: none;
}

/* Tags */
.vault-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 2rem;
}

.vault-card-tags span {
  font-size: 1.05rem;
  font-family: "Nunito", sans-serif;
  font-weight: 700;
  padding: 0.3rem 1.1rem;
  border-radius: 3rem;
  background: #e8e8e8;
  color: #1a1c1c;
  text-transform: none;
}

/* Card footer */
.vault-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(0,0,0,0.06);
  padding-top: 1.5rem;
  margin-top: auto;
  flex-wrap: wrap;
  gap: 1rem;
}

.vault-issuer-name {
  font-size: 1.15rem;
  font-family: "Nunito", sans-serif;
  color: #897362;
  font-weight: 600;
  text-transform: none;
}

/* CTA Link */
.vault-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.3rem;
  font-weight: 700;
  font-family: "Nunito", sans-serif;
  color: #fc8c05;
  text-decoration: none;
  text-transform: none;
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.vault-cta:hover {
  border-bottom-color: #fc8c05;
  color: #904d00;
}

/* ======================== FOOTER ======================== */
.vault-footer {
  text-align: center;
  padding: 3rem 6% 5rem;
  background: #f3f3f3;
}

.vault-back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-size: 1.4rem;
  font-weight: 700;
  font-family: "Nunito", sans-serif;
  color: #1a1c1c;
  text-transform: none;
  transition: color 0.2s ease;
}

.vault-back-link:hover { color: #fc8c05; }

/* ======================== MOBILE ======================== */
@media (max-width: 768px) {
  .vault-nav { display: none; }
  .vault-hamburger { display: block; }

  .vault-hero { padding: 13rem 6% 5rem; }
  .vault-hero-heading { font-size: 4rem; }
  .vault-hero-sub { font-size: 1.4rem; }

  .vault-hero-stats { gap: 2rem; }
  .vault-stat strong { font-size: 2.6rem; }

  .vault-card { flex: 0 0 85vw; }
  .vault-main { padding: 4rem 5% 5rem; }

  .vault-filter-inner { gap: 0.6rem; }
  .vault-filter-count { display: none; }
}