/*
 * PTVA Gallery — Frontend Styles v2.0
 * Pixel-perfect match to the PTVA Institute of Management website
 * as recorded in the demo video.
 *
 * Colour palette extracted from video:
 *   Navy   #1a3162  (hero banners, card footers, breadcrumb links)
 *   White  #ffffff
 *   Border #e0e0e0
 *   Text   #333333
 *   Hover  #2a4a8a
 */

/* ════════════════════════════════════════════════════
   0. CSS CUSTOM PROPERTIES
   ════════════════════════════════════════════════════ */
:root {
  --ptva-navy:        #1a3162;
  --ptva-navy-dark:   #12204a;
  --ptva-navy-light:  #2a4a8a;
  --ptva-white:       #ffffff;
  --ptva-text:        #333333;
  --ptva-border:      #e0e0e0;
  --ptva-bg:          #f4f6fa;
  --ptva-img-radius:  20px;
  --ptva-radius:      20px;
  --ptva-shadow:      0 2px 12px rgba(0,0,0,.10);
  --ptva-trans:       .22s ease;
  --ptva-hero-h:      140px;
}

/* ════════════════════════════════════════════════════
   1. DARK NAVY HERO BANNER
   Matches the dark banner on Year and Event pages
   ════════════════════════════════════════════════════ */
.ptva-hero-banner {
  background: linear-gradient(135deg, var(--ptva-navy) 0%, var(--ptva-navy-dark) 100%);
  position: relative;
  overflow: hidden;
  padding: 36px 0 32px;
}

/* Subtle pattern overlay — gives the "textured" look from video */
.ptva-hero-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(255,255,255,.04) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255,255,255,.03) 0%, transparent 40%);
  pointer-events: none;
}

.ptva-hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.ptva-hero-title {
  color: var(--ptva-white) !important;
  font-size: clamp(1.4rem, 3vw, 2rem) !important;
  font-weight: 700 !important;
  margin: 0 0 10px !important;
  line-height: 1.25 !important;
  text-shadow: 0 1px 3px rgba(0,0,0,.3);
}

/* ════════════════════════════════════════════════════
   2. BREADCRUMB — white text inside hero
   ════════════════════════════════════════════════════ */
.ptva-breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: .85rem;
  color: rgba(255,255,255,.75);
}

.ptva-hero-banner .ptva-breadcrumb a {
  color: rgba(255,255,255,.85);
  text-decoration: none;
  transition: color var(--ptva-trans);
}
.ptva-hero-banner .ptva-breadcrumb a:hover { color: #fff; text-decoration: underline; }

.ptva-bc-sep {
  opacity: .6;
  font-size: .8rem;
}

/* ════════════════════════════════════════════════════
   3. PAGE BODY WRAPPER
   ════════════════════════════════════════════════════ */
.ptva-page-body {
  max-width: 1200px;
  margin: 0 auto;
  padding: 36px 24px 60px;
}

/* ════════════════════════════════════════════════════
   4. LEVEL 1 — "Event Photos" SECTION
   Heading + year cards row (matches video gallery page)
   ════════════════════════════════════════════════════ */
.ptva-gallery-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px 40px;
}

/* "Event Photos" heading — bold, left-aligned, simple */
.ptva-section-heading {
  font-size: 1.6rem !important;
  font-weight: 700 !important;
  color: var(--ptva-text) !important;
  margin: 32px 0 20px !important;
  padding: 0 !important;
  border: none !important;
}

/* Year cards row — responsive grid */
.ptva-years-row {
  display: grid;
  grid-template-columns: repeat( var(--ptva-cols, 4), 1fr );
  gap: 20px;
}

@media (max-width: 960px) {
  .ptva-years-row { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 680px) {
  .ptva-years-row { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 420px) {
  .ptva-years-row { grid-template-columns: 1fr; }
}

/* Individual year item — thumbnail + label exactly as in video */
.ptva-year-item {
  display: flex;
  flex-direction: column;
}

.ptva-year-link {
  display: block;
  text-decoration: none;
  color: var(--ptva-text);
  transition: transform var(--ptva-trans);
}
.ptva-year-link:hover { transform: translateY(-3px); }

.ptva-year-thumb-wrap {
  width: 100%;
  aspect-ratio: 1 / 1;           /* square crop, matching video */
  overflow: hidden;
  border: 1px solid var(--ptva-border);
  border-radius: var(--ptva-img-radius);
  background: #e8ebf0;
  box-shadow: 0 4px 16px rgba(0,0,0,.10);
}

.ptva-year-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: var(--ptva-img-radius);
  transition: transform .35s ease;
}
.ptva-year-link:hover .ptva-year-thumb { transform: scale(1.05); }

.ptva-year-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #aab;
  font-size: 2.5rem;
}

/* Year label below the image */
.ptva-year-label {
  text-align: center;
  font-size: .95rem;
  font-weight: 600;
  color: var(--ptva-text);
  margin: 10px 0 0 !important;
  padding: 0 !important;
  line-height: 1.3;
}

/* Divider line below the years row (matches video) */
.ptva-gallery-section::after {
  content: '';
  display: block;
  height: 1px;
  background: var(--ptva-border);
  margin: 28px 0 0;
}

/* ════════════════════════════════════════════════════
   5. LEVEL 2 — EVENT CARDS GRID
   Shown on Year archive page
   ════════════════════════════════════════════════════ */
.ptva-events-grid {
  display: grid;
  grid-template-columns: repeat( var(--ptva-cols, 3), 1fr );
  gap: 24px;
}

@media (max-width: 900px) {
  .ptva-events-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 540px) {
  .ptva-events-grid { grid-template-columns: 1fr; }
}

.ptva-event-card {
  border: 1px solid var(--ptva-border);
  border-radius: var(--ptva-img-radius);
  overflow: hidden;
  background: var(--ptva-white);
  box-shadow: var(--ptva-shadow);
  transition: box-shadow var(--ptva-trans), transform var(--ptva-trans);
}
.ptva-event-card:hover {
  box-shadow: 0 8px 28px rgba(0,0,0,.16);
  transform: translateY(-4px);
}

.ptva-event-card-inner {
  display: block;
  text-decoration: none;
  color: inherit;
}

.ptva-event-card-img-wrap {
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #dde2ea;
  border-radius: var(--ptva-img-radius) var(--ptva-img-radius) 0 0;
}

.ptva-event-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: var(--ptva-img-radius) var(--ptva-img-radius) 0 0;
  transition: transform .35s ease;
}
.ptva-event-card:hover .ptva-event-card-img { transform: scale(1.05); }

.ptva-event-card-no-img {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #aab;
  font-size: 2rem;
}

/* Card footer — white bg, event title centred */
.ptva-event-card-footer {
  padding: 14px 12px;
  background: var(--ptva-white);
  border-top: 1px solid var(--ptva-border);
}

.ptva-event-card-title {
  font-size: .92rem;
  font-weight: 600;
  color: var(--ptva-text);
  text-align: center;
  margin: 0 !important;
  line-height: 1.35;
}

/* ════════════════════════════════════════════════════
   6. LEVEL 3 — EVENT DETAIL PAGE
   ════════════════════════════════════════════════════ */

/* Info bar (date / location / year) */
.ptva-event-meta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
  padding: 14px 18px;
  background: var(--ptva-bg);
  border-radius: var(--ptva-radius);
  margin-bottom: 28px;
  font-size: .88rem;
  color: #555;
}
.ptva-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}

/* Description block — exactly like video: centred bold heading, then left-aligned body */
.ptva-event-description {
  max-width: 860px;
  margin: 0 auto 32px;
  text-align: left;
}

.ptva-event-desc-heading {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem) !important;
  font-weight: 700 !important;
  color: var(--ptva-text) !important;
  text-align: center !important;
  margin: 0 0 18px !important;
  line-height: 1.3;
}

.ptva-event-desc-body {
  font-size: .97rem;
  line-height: 1.8;
  color: #444;
}
.ptva-event-desc-body p { margin: 0 0 14px; }

/* Extra info block */
.ptva-event-extra {
  max-width: 860px;
  margin: 0 auto 28px;
  padding: 14px 18px;
  background: #fffde7;
  border-left: 4px solid #f0c040;
  border-radius: 0 var(--ptva-radius) var(--ptva-radius) 0;
  font-size: .9rem;
  color: #555;
}
.ptva-event-extra p { margin: 0; }

/* ════════════════════════════════════════════════════
   7. MULTI-PHOTO GRID (3-column, exactly like video)
   ════════════════════════════════════════════════════ */
.ptva-photo-section {
  margin: 0 0 36px;
}

.ptva-photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.ptva-photo-grid-single {
  grid-template-columns: 1fr;
  max-width: 640px;
}

@media (max-width: 720px) {
  .ptva-photo-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 420px) {
  .ptva-photo-grid { grid-template-columns: 1fr; }
}

.ptva-photo-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--ptva-img-radius);
  cursor: pointer;
  background: #dde2ea;
  aspect-ratio: 4 / 3;
  box-shadow: 0 3px 12px rgba(0,0,0,.10);
  transition: box-shadow var(--ptva-trans), transform var(--ptva-trans);
}
.ptva-photo-item:hover {
  box-shadow: 0 6px 22px rgba(0,0,0,.18);
  transform: translateY(-3px);
}

.ptva-photo-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: var(--ptva-img-radius);
  transition: transform .35s ease;
}

.ptva-photo-overlay {
  position: absolute;
  inset: 0;
  background: rgba(26, 49, 98, .45);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--ptva-trans);
}
.ptva-photo-overlay span {
  font-size: 2rem;
  color: #fff;
  filter: drop-shadow(0 1px 3px rgba(0,0,0,.5));
}

.ptva-photo-item:hover img            { transform: scale(1.06); }
.ptva-photo-item:hover .ptva-photo-overlay { opacity: 1; }

/* Back button */
.ptva-back-wrap {
  margin: 10px 0 24px;
}
.ptva-back-btn {
  display: inline-block;
  padding: 9px 22px;
  background: var(--ptva-navy);
  color: var(--ptva-white) !important;
  text-decoration: none;
  border-radius: var(--ptva-radius);
  font-size: .88rem;
  font-weight: 600;
  transition: background var(--ptva-trans), transform .15s;
}
.ptva-back-btn:hover {
  background: var(--ptva-navy-light);
  transform: translateY(-1px);
}

/* ════════════════════════════════════════════════════
   8. LIGHTBOX
   ════════════════════════════════════════════════════ */
.ptva-lightbox {
  position: fixed;
  inset: 0;
  z-index: 99999;
  background: rgba(0, 0, 0, .93);
  display: flex !important;
  align-items: center;
  justify-content: center;
  animation: ptvaLBIn .2s ease;
}

@keyframes ptvaLBIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.ptva-lb-img-wrap {
  max-width: 92vw;
  max-height: 88vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

#ptva-lb-img {
  max-width: 92vw;
  max-height: 84vh;
  object-fit: contain;
  border-radius: var(--ptva-img-radius);
  box-shadow: 0 8px 40px rgba(0,0,0,.7);
  transition: opacity .18s ease;
}

/* Close / Prev / Next buttons */
.ptva-lb-close,
.ptva-lb-prev,
.ptva-lb-next {
  position: fixed;
  background: rgba(255,255,255,.12);
  border: none;
  color: #fff;
  cursor: pointer;
  border-radius: 50%;
  width: 46px;
  height: 46px;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .18s;
  z-index: 100000;
  padding: 0;
  line-height: 1;
}
.ptva-lb-close:hover,
.ptva-lb-prev:hover,
.ptva-lb-next:hover { background: rgba(255,255,255,.28); }

.ptva-lb-close { top: 18px; right: 18px; font-size: 1.6rem; }
.ptva-lb-prev  { left: 18px;  top: 50%; transform: translateY(-50%); }
.ptva-lb-next  { right: 18px; top: 50%; transform: translateY(-50%); }

/* Counter "3 / 12" */
.ptva-lb-counter {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,.7);
  font-size: .85rem;
  letter-spacing: .05em;
  background: rgba(0,0,0,.4);
  padding: 4px 14px;
  border-radius: 20px;
}

/* ════════════════════════════════════════════════════
   9. PAGINATION
   ════════════════════════════════════════════════════ */
.ptva-pagination {
  margin: 36px 0 0;
  text-align: left;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}
.ptva-pagination .page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 12px;
  border: 1px solid var(--ptva-border);
  border-radius: 10px;
  background: var(--ptva-white);
  color: var(--ptva-navy);
  text-decoration: none;
  font-size: .88rem;
  font-weight: 500;
  transition: background var(--ptva-trans), color var(--ptva-trans), border-color var(--ptva-trans);
}
.ptva-pagination .page-numbers.current,
.ptva-pagination .page-numbers:hover {
  background: var(--ptva-navy);
  color: var(--ptva-white);
  border-color: var(--ptva-navy);
}

/* ════════════════════════════════════════════════════
   10. EMPTY STATE & MISC
   ════════════════════════════════════════════════════ */
.ptva-empty {
  padding: 40px 20px;
  text-align: center;
  color: #888;
  font-size: 1rem;
  background: var(--ptva-bg);
  border: 2px dashed var(--ptva-border);
  border-radius: var(--ptva-radius);
  margin: 24px 0;
}

/* Prevent lightbox from scrolling body */
body.ptva-lb-open { overflow: hidden; }