/* MEMORIES
   Original Folio typography, auth modal, management UI and footer
   + Interactive Photo Album physical-book presentation.
*/
:root {
  --ink: #29251f;
  --muted: #81786d;
  --paper: #f7f1e6;
  --paper-dark: #e8ddca;
  --cream: #fffaf2;
  --accent: #a47b55;
  --accent-dark: #8b6545;
  --line: rgba(37,33,31,.12);
  --shadow: 0 30px 80px rgba(58, 43, 32, .15);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100%;
  color: var(--ink);
  background:
    radial-gradient(circle at 50% 10%, #fffdf8 0, #f5eee3 42%, #e8dfd1 100%);
  font-family: "DM Sans", sans-serif;
  overflow-x: hidden;
}
button, input { font: inherit; }
button { cursor: pointer; }
.hidden { display: none !important; }

.noise {
  position: fixed; inset: 0; pointer-events: none; opacity: .035; z-index: 200;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.8'/%3E%3C/svg%3E");
}

.topbar {
  height: 76px;
  padding: 0 5vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(247,241,230,.88);
  backdrop-filter: blur(14px);
}
.brand {
  color: var(--ink);
  text-decoration: none;
  display: flex;
  gap: 10px;
  align-items: center;
  font-weight: 700;
  letter-spacing: -.03em;
}
.brand-mark {
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--ink); color: var(--paper);
  display: grid; place-items: center;
  font-family: "Playfair Display", serif;
}
.top-actions { display:flex; align-items:center; gap:18px; }
.photo-count { color:var(--muted); font-size:13px; }

.button {
  border: 0; border-radius: 999px; padding: 13px 20px;
  font-weight: 600; transition: .25s ease;
}
.button-primary { background: var(--ink); color: #fff; }
.button-primary:hover { transform:translateY(-2px); background:#000; }
.button-soft { background:#e5d9ca; color:var(--ink); }
.button-ghost { background:transparent; border:1px solid var(--line); color:var(--ink); }
.button.full { width:100%; }

.eyebrow {
  margin: 0 0 10px;
  font-size: 11px;
  line-height: 1;
  letter-spacing: .28em;
  font-weight: 700;
  color: var(--accent-dark);
}

/* Interactive Photo Album section */
.interactive-section {
  width: min(1400px, 100%);
  margin: auto;
  padding: 54px 34px 42px;
}

.intro {
  text-align: center;
  margin: 0 auto 42px;
}
.intro h1 {
  margin: 0;
  font-family: "Playfair Display", Georgia, serif;
  font-size: clamp(42px, 6vw, 78px);
  font-weight: 400;
  line-height: .98;
  letter-spacing: -.04em;
}
.intro h1 em { font-weight: 400; }
.intro p:last-child {
  margin: 18px 0 0;
  color: var(--muted);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 16px;
}

.album-stage {
  position: relative;
  width: min(1120px, 96vw);
  margin: 0 auto;
  padding: 35px 65px;
  perspective: 2400px;
  touch-action: pan-y;
}

.book-shadow {
  position: absolute;
  left: 9%; right: 9%; bottom: 8px; height: 30px;
  border-radius: 50%;
  background: rgba(30,24,18,.25);
  filter: blur(18px);
  transform: translateZ(-80px);
}

.book {
  position: relative;
  width: 100%;
  aspect-ratio: 1.72 / 1;
  transform-style: preserve-3d;
  transform: rotateX(2deg);
  user-select: none;
  cursor: grab;
}
.book.dragging { cursor: grabbing; }

.cover-back {
  position:absolute; inset:-7px -8px;
  border-radius:8px;
  background: linear-gradient(90deg,#25231f 0%,#37332d 48%,#24211e 100%);
  box-shadow: 0 25px 40px rgba(35,28,20,.22), inset 0 0 0 1px rgba(255,255,255,.05);
  transform: translateZ(-28px);
}

.spread {
  position:absolute; inset:0;
  display:grid;
  grid-template-columns:1fr 1fr;
  transform-style:preserve-3d;
}
.page-face {
  position:relative;
  overflow:hidden;
  background:
    linear-gradient(90deg,rgba(0,0,0,.05),transparent 12%,transparent 88%,rgba(0,0,0,.045)),
    var(--paper);
  box-shadow: inset 0 0 20px rgba(80,55,30,.08);
}
.left-page { border-radius:5px 0 0 5px; transform-origin:right center; }
.right-page { border-radius:0 5px 5px 0; transform-origin:left center; }

.page-face img, .turn-face img {
  position:absolute;
  inset:5%;
  width:90%; height:90%;
  object-fit:cover;
  border-radius:2px;
  box-shadow:0 8px 18px rgba(50,35,20,.15);
  background:#eee5d7;
}
.empty-page {
  position:absolute; inset:20%;
  display:grid; place-items:center;
  text-align:center;
  color:#aaa093;
  font-size:clamp(15px,2vw,22px);
  font-family:Georgia, "Times New Roman", serif;
  font-style:italic;
}
.page-number {
  position:absolute;
  bottom:15px;
  font:11px Arial,sans-serif;
  color:#9b9185;
  letter-spacing:.08em;
}
.left-page .page-number { left:24px; }
.right-page .page-number { right:24px; }

.paper-edge {
  position:absolute; z-index:2; top:2%; bottom:2%; width:4px;
  background:linear-gradient(90deg,rgba(80,60,40,.10),transparent);
  pointer-events:none;
}
.left-page .paper-edge { right:0; }
.right-page .paper-edge { left:0; }

.spine {
  position:absolute; z-index:20; left:50%; top:0; bottom:0; width:13px;
  transform:translateX(-50%);
  background:linear-gradient(90deg,rgba(0,0,0,.22),rgba(255,255,255,.2) 30%,rgba(0,0,0,.08) 52%,rgba(255,255,255,.16));
  box-shadow:0 0 9px rgba(0,0,0,.18);
  pointer-events:none;
}

.page-stack {
  position:absolute; top:2px; bottom:2px; width:9px; z-index:4; pointer-events:none;
}
.left-stack {
  left:-5px; border-radius:4px 0 0 4px;
  background:repeating-linear-gradient(0deg,#eee4d3 0 2px,#d8cdbb 2px 3px);
}
.right-stack {
  right:-5px; border-radius:0 4px 4px 0;
  background:repeating-linear-gradient(0deg,#eee4d3 0 2px,#d8cdbb 2px 3px);
}

.turn-sheet {
  position:absolute; top:0; bottom:0; width:50%; z-index:15;
  display:none; transform-style:preserve-3d; will-change:transform;
}
.turn-sheet.forward {
  right:0; transform-origin:left center;
  animation:turnForward .92s cubic-bezier(.2,.72,.2,1) forwards;
}
.turn-sheet.backward {
  left:0; transform-origin:right center;
  animation:turnBackward .92s cubic-bezier(.2,.72,.2,1) forwards;
}
.turn-face {
  position:absolute; inset:0; overflow:hidden;
  background:
    linear-gradient(90deg,rgba(0,0,0,.06),transparent 16%,transparent 84%,rgba(0,0,0,.06)),
    var(--paper);
  backface-visibility:hidden;
  -webkit-backface-visibility:hidden;
  box-shadow:0 15px 30px rgba(25,18,12,.18);
}
.turn-front { transform:rotateY(0deg); }
.turn-back { transform:rotateY(180deg); }
.turn-face::after {
  content:""; position:absolute; inset:0; pointer-events:none;
  background:linear-gradient(90deg,rgba(0,0,0,.2),transparent 22%,transparent 78%,rgba(0,0,0,.12));
  opacity:.35;
}
.turn-sheet.forward .turn-face { box-shadow:-18px 10px 30px rgba(20,14,8,.22); }
.turn-sheet.backward .turn-face { box-shadow:18px 10px 30px rgba(20,14,8,.22); }

@keyframes turnForward {
  0% { transform:rotateY(0deg); filter:brightness(1); }
  45% { filter:brightness(.92); }
  100% { transform:rotateY(-180deg); filter:brightness(1); }
}
@keyframes turnBackward {
  0% { transform:rotateY(0deg); filter:brightness(1); }
  45% { filter:brightness(.92); }
  100% { transform:rotateY(180deg); filter:brightness(1); }
}

.nav {
  position:absolute; top:50%; width:48px; height:48px; margin-top:-24px;
  border:1px solid rgba(40,32,24,.14); border-radius:50%;
  background:rgba(255,252,246,.8); color:var(--ink);
  font-size:34px; line-height:40px; cursor:pointer; z-index:50;
  transition:transform .2s,background .2s;
  backdrop-filter:blur(8px);
}
.nav:hover { transform:scale(1.08); background:#fff; }
.prev { left:5px; }
.next { right:5px; }
.nav:disabled { opacity:.25; cursor:default; transform:none; }

.album-controls {
  width:min(560px,70vw);
  margin:24px auto 0;
  display:flex; align-items:center; gap:15px;
  font:11px Arial,sans-serif;
  color:var(--muted);
  letter-spacing:.08em;
}
.progress { height:2px; flex:1; background:rgba(60,45,30,.14); }
.progress span {
  display:block; width:0; height:100%; background:var(--accent);
  transition:width .35s ease;
}
.instruction {
  text-align:center;
  color:#91877b;
  font:11px Arial,sans-serif;
  margin-top:22px;
  letter-spacing:.05em;
}

/* Original Folio photo-management section retained */
.manage-section { padding:7vw 5vw; background:rgba(245,240,232,.72); }
.manage-card { max-width:1200px; margin:auto; }
.manage-head {
  display:flex; justify-content:space-between; align-items:end;
  gap:20px; margin-bottom:30px;
}
.manage-card h2 {
  font:500 46px "Playfair Display",serif;
  margin:8px 0 0;
  letter-spacing:-.04em;
}
.manage-card p { color:var(--muted); margin-bottom:0; }
.upload-button {
  border-radius:999px; background:var(--ink); color:#fff;
  padding:13px 20px; font-weight:600; cursor:pointer;
}
.upload-button input { display:none; }
.progress-upload {
  height:5px; background:rgba(60,45,30,.12);
  border-radius:999px; overflow:hidden; margin-bottom:24px;
}
.progress-upload span {
  display:block; height:100%; width:0; background:var(--accent);
  transition:width .2s ease;
}
.thumb-grid {
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:12px;
}
.thumb {
  position:relative; aspect-ratio:1; overflow:hidden;
  border-radius:6px; background:#e5dccf;
}
.thumb img { width:100%; height:100%; object-fit:cover; display:block; }
.thumb-number {
  position:absolute; left:9px; bottom:8px; color:#fff;
  font-size:11px; text-shadow:0 1px 5px #000;
}
.delete-photo {
  position:absolute; right:8px; top:8px;
  width:30px; height:30px; border:0; border-radius:50%;
  background:rgba(255,255,255,.9); color:#222;
}

/* ORIGINAL FOLIO LOGIN POP-UP styling */
.login-modal {
  position:fixed; inset:0; z-index:100;
  display:grid; place-items:center; padding:20px;
}
.modal-backdrop {
  position:absolute; inset:0;
  background:rgba(28,22,18,.58);
  backdrop-filter:blur(7px);
}
.modal {
  position:relative;
  width:min(440px,100%);
  background:var(--cream);
  padding:42px;
  border-radius:10px;
  box-shadow:0 30px 100px rgba(0,0,0,.25);
}
.modal h2 {
  font:500 38px "Playfair Display",serif;
  margin:10px 0 8px;
}
.modal p { color:var(--muted); font-size:14px; }
.modal form { display:grid; gap:10px; margin-top:25px; }
.modal input {
  border:1px solid var(--line); background:#fff;
  padding:14px 15px; border-radius:5px; outline:none;
}
.modal input:focus { border-color:var(--accent); }
.modal-close {
  position:absolute; right:17px; top:13px;
  border:0; background:none; font-size:28px; color:var(--muted);
}
.text-button {
  border:0; background:none; margin:17px auto 0;
  display:block; color:var(--accent-dark); font-weight:600;
}
.auth-message {
  margin-top:15px; color:var(--accent-dark);
  font-size:13px; min-height:18px;
}

footer {
  padding:28px 5vw;
  display:flex; justify-content:space-between;
  color:var(--muted);
  font-size:12px;
  border-top:1px solid var(--line);
}

@media (max-width: 850px) {
  .interactive-section { padding:50px 20px 36px; }
  .manage-head { align-items:start; flex-direction:column; }
  .thumb-grid { grid-template-columns:repeat(3,1fr); }
}

@media (max-width: 700px) {
  .topbar { padding:0 4vw; }
  .photo-count { display:none; }
  .interactive-section { padding:38px 10px 30px; }
  .intro { margin-bottom:28px; }
  .intro h1 { font-size:42px; }
  .album-stage { width:100%; padding:24px 38px; }
  .book { aspect-ratio:1.55 / 1; }
  .nav { width:38px; height:38px; font-size:28px; line-height:30px; margin-top:-19px; }
  .prev { left:0; } .next { right:0; }
  .page-face img, .turn-face img { inset:6%; width:88%; height:88%; }
  .empty-page { inset:16%; font-size:13px; }
  .page-number { bottom:9px; font-size:8px; }
  .left-page .page-number { left:12px; }
  .right-page .page-number { right:12px; }
  .modal { padding:34px 24px; }
}

@media (max-width: 520px) {
  .thumb-grid { grid-template-columns:repeat(2,1fr); }
  .manage-card h2 { font-size:36px; }
}


/* Family & Friends viewer access */
.viewer-access {
  margin-top: 26px; padding: 22px; border: 1px solid rgba(60,45,30,.12);
  border-radius: 14px; background: rgba(255,255,255,.45);
  display: grid; gap: 18px;
}
.viewer-access h3 { margin: 4px 0 6px; font-family: Georgia, "Times New Roman", serif; font-size: 22px; }
.viewer-access p { margin: 0; color: #81776c; line-height: 1.55; }
.viewer-form { display: grid; gap: 10px; }
.viewer-form input { width: 100%; box-sizing: border-box; }
.viewer-form-actions { display:flex; flex-wrap:wrap; gap:10px; }
.auth-tabs { display:flex; gap:8px; margin: 18px 0; padding:4px; background:#f1ece5; border-radius:10px; }
.auth-tab { flex:1; border:0; background:transparent; padding:10px 8px; border-radius:8px; cursor:pointer; color:#756b60; font-weight:600; }
.auth-tab.active { background:#fff; color:#2e2924; box-shadow:0 2px 8px rgba(30,20,10,.08); }
.viewer-mode .modal h2 { margin-bottom: 4px; }
.viewer-mode #email { display:none; }
.viewer-mode #password { display:block; }
.viewer-mode #authSubmit { display:block; }
.viewer-mode #toggleAuthMode { display:none; }
.viewer-badge { display:inline-flex; align-items:center; gap:6px; margin-left:10px; padding:5px 9px; border-radius:999px; background:#eee8df; color:#6e6357; font-size:11px; letter-spacing:.08em; text-transform:uppercase; }
.viewer-only-hide { display:none !important; }
@media (max-width: 640px) { .viewer-access { padding:18px; } .viewer-form-actions .button { width:100%; } }