/* ==========================================================================
   Krishna Sahoo Portfolio — Achievements Section v4.0
   Editorial Three-Column Vertical Infinite Gallery
   Apple x Linear x Stripe · Restrained Premium Design
   ========================================================================== */

/* ============================================================
   1. SECTION FOUNDATION
   ============================================================ */

.achievements-section {
  position: relative;
  z-index: 10;
  background-color: lab(99.38% 0.15 1.65);
  width: 100%;
  padding: 7rem 0 5rem;
  overflow: hidden;
}

/* ============================================================
   2. TOP-TO-BOTTOM CONTAINER LAYOUT
   ============================================================ */

.ach-container {
  max-width: 1380px;
  margin: 0 auto;
  padding: 0 3.5rem;
  display: flex;
  flex-direction: column;
  gap: 2.2rem;
}

/* ============================================================
   3. HEADER TOP AREA (Title + Horizontal Filter Pills)
   ============================================================ */

.ach-top-area {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 1.5rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  padding-bottom: 1.8rem;
}

.ach-header {
  flex: 1;
  min-width: 280px;
}

/* 3a. Section Header */
.ach-eyebrow {
  font-family: 'Outfit', sans-serif;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: #0ea271;
  margin-bottom: 0.55rem;
}

.ach-title {
  font-family: 'Lato', sans-serif;
  font-size: 3rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  color: #1a1a1a;
  line-height: 0.95;
  margin-bottom: 0.9rem;
  text-transform: uppercase;
}

.ach-title-em { color: #0ea271; }

.ach-tagline-wrap {
  position: relative;
  display: inline-block;
}

.ach-tagline {
  font-size: 0.95rem;
  color: #777;
  font-weight: 300;
  line-height: 1.5;
  font-style: normal;
}

.ach-tagline-italic {
  font-style: italic;
  color: #1a1a1a;
  font-weight: 500;
}

.ach-tagline-underline {
  position: absolute;
  bottom: -5px;
  left: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, #0ea271 0%, rgba(14,162,113,0.08) 100%);
  border-radius: 2px;
  animation: ach-underline-grow 1.2s cubic-bezier(0.16, 1, 0.3, 1) 0.6s forwards;
}

@keyframes ach-underline-grow { to { width: 100%; } }

/* 3b. Horizontal Clean Category Filter Pills */
.ach-filter-pills {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
}

.ach-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  background: #FFFFFF;
  border: 1.5px solid rgba(0, 0, 0, 0.07);
  border-radius: 30px;
  font-family: 'Outfit', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  color: #555;
  cursor: pointer;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.ach-pill span {
  font-size: 0.72rem;
  color: #aaa;
  font-weight: 500;
  transition: color 0.22s ease;
}

.ach-pill:hover {
  border-color: rgba(14, 162, 113, 0.35);
  color: #1a1a1a;
  background: #FAFFFC;
  transform: translateY(-2px);
}

.ach-pill.active {
  background: #0ea271;
  border-color: #0ea271;
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(14, 162, 113, 0.25);
}

.ach-pill.active span {
  color: rgba(255, 255, 255, 0.88);
}


/* ============================================================
   4. GALLERY WRAPPER (Full Width Below Header)
   ============================================================ */

.ach-gallery-wrap {
  width: 100%;
  display: flex;
  flex-direction: column;
}

.ach-col-arrows {
  display: flex;
  margin-bottom: 0.6rem;
}

.ach-col-arrow {
  flex: 1;
  text-align: center;
  font-size: 0.7rem;
  color: #ccc;
  font-weight: 700;
  letter-spacing: 1px;
}

/* ============================================================
   5. GALLERY GRID (Three Angled Columns)
   ============================================================ */

.ach-gallery {
  display: flex;
  gap: 28px;
  height: 75vh;
  min-height: 420px;
  max-height: 720px;
  position: relative;
}

.ach-col {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  position: relative;
  border-radius: 6px;
  opacity: 0;
}

#ach-col-2 {
  z-index: 2;
}

/* Reveal animations */
.ach-gallery.revealed .ach-col:nth-child(1) {
  animation: ach-col-rise 0.9s cubic-bezier(0.16,1,0.3,1) 0s forwards;
}
.ach-gallery.revealed .ach-col:nth-child(2) {
  animation: ach-col-fall 0.9s cubic-bezier(0.16,1,0.3,1) 0.08s forwards;
}
.ach-gallery.revealed .ach-col:nth-child(3) {
  animation: ach-col-rise 0.9s cubic-bezier(0.16,1,0.3,1) 0.16s forwards;
}

@keyframes ach-col-rise {
  from { opacity: 0; transform: translateY(36px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes ach-col-fall {
  from { opacity: 0; transform: translateY(-36px); }
  to   { opacity: 1; transform: translateY(0); }
}

.ach-col-track {
  display: flex;
  flex-direction: column;
  gap: 14px;
  will-change: transform;
  padding: 2px;
}

/* Ambient radial per-column */
.ach-col::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 5;
  background: radial-gradient(
    280px circle at var(--col-mx, 50%) var(--col-my, 50%),
    rgba(255,255,255,0.38),
    transparent 70%
  );
  opacity: 0;
  transition: opacity 0.35s ease;
}
.ach-col.col-hovered::after { opacity: 1; }

/* ============================================================
   6. ACHIEVEMENT CARDS
   ============================================================ */

.ach-card {
  width: 100%;
  flex-shrink: 0;
  border-radius: 14px;
  background: #FFFFFF;
  border: 1px solid rgba(0,0,0,0.07);
  box-shadow: 0 2px 6px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.02);
  padding: 13px;
  cursor: pointer;
  position: relative;
  box-sizing: border-box;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 7px;
  --rotation: 0deg;
  --scale: 1;
  --mx: 0px;
  --my: 0px;
  --lift: 0px;
  transform: rotate(var(--rotation)) scale(var(--scale))
             translate(var(--mx), calc(var(--lift) + var(--my)));
  transform-origin: center center;
  transition:
    transform 0.42s cubic-bezier(0.16,1,0.3,1),
    box-shadow 0.42s ease,
    border-color 0.3s ease,
    filter 0.38s ease,
    opacity 0.38s ease;
  will-change: transform, filter, opacity;
}

.ach-card--hero {
  background: #FAFFFC;
  border-color: rgba(14,162,113,0.13);
}

.ach-card-recent-ribbon {
  position: absolute;
  top: 11px;
  right: 11px;
  background: #0ea271;
  color: #fff;
  font-size: 0.52rem;
  font-weight: 800;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 20px;
  z-index: 3;
}

.ach-card-meta { display: flex; align-items: center; }

.ach-card-category {
  font-size: 0.58rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #bbb;
}

.ach-card--hero .ach-card-category { color: #0ea271; }

.ach-card-title {
  font-family: 'Outfit', sans-serif;
  font-size: 0.9rem;
  font-weight: 800;
  color: #1a1a1a;
  line-height: 1.28;
  letter-spacing: -0.2px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.ach-card--hero .ach-card-title { font-size: 0.95rem; }

.ach-card-visual {
  flex: 1;
  min-height: 60px;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.05);
  background: rgba(0,0,0,0.02);
}

.ach-card--hero .ach-card-visual {
  min-height: 90px;
}

.ach-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.16,1,0.3,1);
}

.ach-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  border-top: 1px solid rgba(0,0,0,0.05);
  padding-top: 7px;
  gap: 6px;
  flex-shrink: 0;
}

.ach-card-issuer {
  font-size: 0.68rem;
  font-weight: 700;
  color: #555;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ach-card-date {
  font-size: 0.62rem;
  color: #bbb;
  flex-shrink: 0;
}

.ach-card-inspect {
  position: absolute;
  bottom: 11px;
  right: 11px;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--accent, #0ea271);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.22s ease, transform 0.22s ease;
  pointer-events: none;
}

/* ============================================================
   7. HOVER STATES
   ============================================================ */

.ach-col.col-hovering .ach-card:not(.ach-card--hovered) {
  --scale: 0.96;
  filter: blur(1.8px);
  opacity: 0.48;
}

.ach-card.ach-card--hovered {
  --scale: 1.04;
  --lift: -8px;
  box-shadow: none;
  border-color: rgba(0,0,0,0.1);
  z-index: 10;
}

.ach-card.ach-card--hovered .ach-card-img { transform: scale(1.07); }

.ach-card.ach-card--hovered .ach-card-inspect {
  opacity: 0.9;
  transform: translateY(0);
}

/* ============================================================
   8. FILTER STATE
   ============================================================ */

.ach-card.ach-card--filtered {
  opacity: 0.1;
  --scale: 0.92;
  pointer-events: none;
  transition: transform 0.38s cubic-bezier(0.16,1,0.3,1), opacity 0.38s ease;
}

/* ============================================================
   9. KEYBOARD FOCUS
   ============================================================ */

.ach-card:focus-visible {
  outline: 2px solid #0ea271;
  outline-offset: 3px;
  border-radius: 16px;
}

.ach-radial-node:focus-visible,
.ach-radial-center:focus-visible {
  outline: 2px solid #0ea271;
  outline-offset: 3px;
}

/* ============================================================
   10. SCROLL HINT
   ============================================================ */

.ach-scroll-hint {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.4rem;
  color: #ccc;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

.ach-scroll-dot {
  animation: ach-scroll-bounce 1.9s ease-in-out infinite;
}

@keyframes ach-scroll-bounce {
  0%, 100% { transform: translateY(0); opacity: 0.5; }
  50% { transform: translateY(5px); opacity: 0.15; }
}

/* ============================================================
   11. PORTAL OVERLAY (FLIP-compatible)
   ============================================================ */

.portal-zoom-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0,0,0,0.58);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.42s cubic-bezier(0.16,1,0.3,1);
}

.portal-zoom-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.portal-content-wrapper {
  background: linear-gradient(135deg, rgba(255,255,255,0.97) 0%, rgba(248,248,248,0.98) 100%);
  border: 1px solid rgba(255,255,255,0.4);
  box-shadow: 0 30px 80px rgba(0,0,0,0.25);
  width: 90%;
  max-width: 980px;
  height: 550px;
  border-radius: 26px;
  display: flex;
  overflow: hidden;
  transform-origin: center center;
}

.portal-left {
  flex: 1.15;
  background: rgba(0,0,0,0.02);
  border-right: 1px solid rgba(0,0,0,0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.8rem;
  overflow: hidden;
  position: relative;
}

.portal-cert-img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 12px;
  box-shadow: 0 14px 38px rgba(0,0,0,0.08), 0 0 0 1px rgba(0,0,0,0.04);
  cursor: zoom-in;
  transition: transform 0.38s cubic-bezier(0.16,1,0.3,1);
  will-change: transform;
}

.portal-cert-img:hover { transform: scale(1.035); }

.portal-right {
  flex: 0.85;
  padding: 3rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-align: left;
  position: relative;
  box-sizing: border-box;
}

.portal-close-btn {
  position: absolute;
  top: 1.4rem;
  right: 1.7rem;
  font-size: 2rem;
  background: none;
  border: none;
  color: #999;
  cursor: pointer;
  line-height: 1;
  transition: color 0.2s ease, transform 0.2s ease;
  z-index: 10;
}

.portal-close-btn:hover { color: #111; transform: scale(1.12); }

.portal-category-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  background: rgba(0,0,0,0.04);
  border: 1px solid rgba(0,0,0,0.04);
  color: #555;
  border-radius: 20px;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  width: fit-content;
  margin-bottom: 0.9rem;
}

.portal-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.72rem;
  font-weight: 800;
  color: #1a1a1a;
  line-height: 1.18;
  margin-bottom: 0.45rem;
}

.portal-issuer { font-size: 0.9rem; font-weight: 700; color: #444; }
.portal-date { font-size: 0.82rem; color: #aaa; margin-top: 0.18rem; }

.portal-desc {
  font-size: 0.87rem;
  line-height: 1.58;
  color: #666;
  font-weight: 300;
  margin-top: 1rem;
  margin-bottom: 1rem;
}

.portal-tech-row { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 1.4rem; }

.portal-tech-pill {
  font-size: 0.64rem;
  font-weight: 600;
  color: #666;
  background: rgba(0,0,0,0.04);
  border: 1px solid rgba(0,0,0,0.05);
  padding: 3px 10px;
  border-radius: 20px;
}

.btn-portal-verify {
  text-decoration: none;
  background: #111;
  color: #fff;
  border: 1.5px solid #111;
  font-size: 0.77rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  padding: 0.75rem 1.7rem;
  border-radius: 50px;
  text-align: center;
  transition: all 0.3s cubic-bezier(0.25,0.8,0.25,1);
  display: inline-block;
  width: fit-content;
  box-shadow: 0 4px 12px rgba(0,0,0,0.14);
}

.btn-portal-verify:hover {
  background: transparent;
  color: #111;
  box-shadow: 0 8px 20px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}

/* ============================================================
   12. LIGHTBOX
   ============================================================ */

.portal-lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.87);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1100;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.portal-lightbox.active { opacity: 1; pointer-events: auto; }

.portal-lightbox-img {
  max-width: 90%;
  max-height: 85vh;
  object-fit: contain;
  box-shadow: 0 10px 40px rgba(0,0,0,0.5);
  border-radius: 8px;
  transform: scale(0.93);
  transition: transform 0.32s cubic-bezier(0.16,1,0.3,1);
}

.portal-lightbox.active .portal-lightbox-img { transform: scale(1); }

/* ============================================================
   13. RESPONSIVE
   ============================================================ */

@media (max-width: 1080px) {
  .ach-container { padding: 0 2rem; }
  .ach-top-area { flex-direction: column; align-items: flex-start; gap: 1.2rem; }
}

@media (max-width: 900px) {
  .ach-gallery { height: 72vh; gap: 14px; }
  #ach-col-3 { display: none; }
  .ach-col-arrows .ach-col-arrow:last-child { display: none; }
  .portal-content-wrapper { height: 500px; max-width: 680px; }
  .portal-right { padding: 2rem; }
}

@media (max-width: 600px) {
  .achievements-section { padding: 4.5rem 0 3rem; }
  .ach-container { padding: 0 1rem; }
  .ach-title { font-size: 2rem; }
  .ach-gallery { gap: 10px; height: 65vh; }
  #ach-col-2 { display: none; }
  .ach-col-arrows .ach-col-arrow:nth-child(2) { display: none; }
  .portal-content-wrapper { flex-direction: column; height: 88vh; width: 96%; border-radius: 20px; }
  .portal-left { flex: 0.8; padding: 1.2rem; border-right: none; border-bottom: 1px solid rgba(0,0,0,0.05); }
  .portal-right { flex: 1.2; padding: 1.4rem; overflow-y: auto; }
  .portal-title { font-size: 1.3rem; }
}

@media (max-width: 480px) {
  .achievements-section { padding: 4rem 0 2.5rem; }
  .ach-container { padding: 0 0.75rem; }
  .ach-title { font-size: 1.8rem; letter-spacing: 1px; }
  .ach-top-area { gap: 0.8rem; }
  .ach-gallery { height: 60vh; gap: 8px; }
  .portal-content-wrapper { width: 98%; border-radius: 16px; height: 90vh; }
  .portal-title { font-size: 1.15rem; }
  .portal-left { padding: 1rem; }
  .portal-right { padding: 1rem; }
}

/* ============================================================
   14. REDUCED MOTION
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  .ach-tagline-underline,
  .ach-card,
  .ach-col,
  .portal-content-wrapper,
  .portal-cert-img,
  .ach-recent-dot,
  .ach-scroll-dot {
    animation: none !important;
    transition: none !important;
  }
  .ach-col { opacity: 1 !important; transform: none !important; }
  .ach-gallery.revealed .ach-col { animation: none !important; opacity: 1 !important; }
  .ach-tagline-underline { width: 100%; }
  .portal-zoom-overlay { backdrop-filter: none; }
}