/* ═══════════════════════════════════════════════════════════════
   ULTRA-REALISTIC PAPER FLIPBOOK — Soft Paper Edition
   ═══════════════════════════════════════════════════════════════ */

/* ── Reset ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}

body{
  font-family:'Inter',sans-serif;
  min-height:100vh;
  overflow:hidden;
  line-height:1.6;
  /* Warm mahogany desk */
  background: #3A2218;
  background-image:
    repeating-linear-gradient(92deg, transparent, transparent 60px, rgba(0,0,0,0.03) 60px, rgba(0,0,0,0.03) 62px),
    repeating-linear-gradient(0deg, transparent, transparent 3px, rgba(255,255,255,0.007) 3px, rgba(255,255,255,0.007) 4px),
    radial-gradient(ellipse at 50% 30%, #4D2F1E 0%, #3A2218 50%, #2A180F 100%);
  color:#2C1810;
}

/* Vignette */
body::after{
  content:'';position:fixed;inset:0;pointer-events:none;z-index:1;
  background:radial-gradient(ellipse at center, transparent 40%, rgba(0,0,0,0.35) 100%);
}

/* ── CSS Variables ── */
:root{
  --gold:   #C5A059;
  --gold-l: #E4D9C5;
  --gold-d: #8B6914;
  --paper:  #F9F3E5;
  --paper-edge: #EDE6D4;
  --ink:    #2C1810;
  --ink-l:  #4A3728;
  --muted:  #7A6E5D;
  --border: rgba(139,105,20,0.2);
  --border-s: rgba(139,105,20,0.4);
  --ease:   cubic-bezier(0.4, 0, 0.2, 1);
  --flip:   cubic-bezier(0.645, 0.045, 0.355, 1.000);
}

/* ── Canvas ── */
canvas.fx{position:fixed;inset:0;pointer-events:none;z-index:9000;}

/* ═══════════════════════════════════════
   PRELOADER
   ═══════════════════════════════════════ */
#loader{
  position:fixed;inset:0;z-index:9999;
  background: #3A2218;
  background-image: radial-gradient(ellipse at center, #4D2F1E 0%, #2A180F 100%);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:28px;
  transition:opacity 1s var(--ease),visibility 1s;
}
#loader.out{opacity:0;visibility:hidden;pointer-events:none}
.ld-logo{
  font-family:'Dancing Script',cursive;
  font-size:5rem;color:var(--gold);
  text-shadow: 0 2px 10px rgba(197,160,89,0.4);
  animation:logoBreath 2s ease-in-out infinite;
}
@keyframes logoBreath{0%,100%{opacity:.7;transform:scale(1)}50%{opacity:1;transform:scale(1.05)}}
.ld-line{width:100px;height:1px;background:rgba(197,160,89,0.3);position:relative;overflow:hidden;}
.ld-line::after{content:'';position:absolute;inset:0;width:50px;background:var(--gold);animation:lineShimmer 1.5s linear infinite;}
@keyframes lineShimmer{from{transform:translateX(-50px)}to{transform:translateX(150px)}}
.ld-txt{font-family:'Inter',sans-serif;font-size:0.75rem;font-weight:600;letter-spacing:.25em;text-transform:uppercase;color:var(--gold-l);}

/* ── UI Controls ── */
.ui-tl{position:fixed;top:20px;left:24px;z-index:90;display:flex;gap:12px;align-items:center}
.ctrl-btn{
  width:44px;height:44px;border-radius:50%;
  border:1px solid rgba(197,160,89,0.3);
  background:rgba(30,20,12,0.6); backdrop-filter:blur(10px);
  cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:all .3s var(--ease);color:var(--gold);
}
.ctrl-btn svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.ctrl-btn:hover{border-color:var(--gold);background:rgba(197,160,89,0.15);transform:scale(1.1);}
.ctrl-btn.off{color:rgba(197,160,89,0.4);border-color:transparent;background:rgba(30,20,12,0.3);}

/* ═══════════════════════════════════════
   ENVELOPE SCREEN
   ═══════════════════════════════════════ */
#env-screen{
  position:fixed;inset:0;z-index:80;
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;
  transition:opacity 1.5s var(--ease),visibility 1.5s;
  background: #3A2218;
  background-image: radial-gradient(ellipse at center, #4D2F1E 0%, #2A180F 100%);
}
#env-screen.gone{opacity:0;visibility:hidden;pointer-events:none}
.env-scene{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;gap:40px;animation:envAppear 1.2s var(--ease) both;}
@keyframes envAppear{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.env-crown{display:flex;align-items:center;gap:16px;}
.env-crown-line{width:80px;height:1px;background:rgba(197,160,89,0.3);}
.env-crown-gem{width:6px;height:6px;background:var(--gold);transform:rotate(45deg);}
.env-crown-gem.sm{width:4px;height:4px;background:rgba(197,160,89,0.4);}
.env-crown-text{font-family:'Inter',sans-serif;font-size:0.8rem;font-weight:600;letter-spacing:.25em;text-transform:uppercase;color:var(--gold);}
.env-3d{perspective:1000px}
.env-card{width:min(480px,88vw);position:relative;transform-style:preserve-3d;transition:transform .6s var(--ease);cursor:pointer;}
.env-shadow{position:absolute;bottom:-20px;left:5%;right:5%;height:20px;background:rgba(0,0,0,0.4);filter:blur(12px);transition:transform .6s var(--ease),opacity .6s;border-radius:50%;}
.env-card:hover ~ .env-shadow{transform:translateY(5px) scaleX(.95);opacity:.2}
.env-card:hover{transform:translateY(-5px);}
.env-svg{width:100%;display:block;filter:drop-shadow(0 20px 50px rgba(0,0,0,0.5));}
.env-seal{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:80px;height:80px;border-radius:50%;background:conic-gradient(from 45deg,#8C1C13,#BF2A20,#8C1C13,#600F0A,#8C1C13);box-shadow:0 5px 20px rgba(0,0,0,0.5),inset 0 0 10px rgba(0,0,0,0.3);display:flex;align-items:center;justify-content:center;z-index:5;}
.env-seal-inner{width:60px;height:60px;border-radius:50%;border:1px solid rgba(255,255,255,0.15);display:flex;align-items:center;justify-content:center;box-shadow:inset 0 0 10px rgba(0,0,0,0.4);}
.env-seal svg{width:32px;height:32px;fill:rgba(255,255,255,.8);}
.env-card.opening .env-flap-g{transform-origin:50% 0;animation:flapOpen 1.2s var(--ease) forwards;transform-style:preserve-3d;}
@keyframes flapOpen{to{transform:rotateX(-180deg);opacity:0}}
.env-caption{text-align:center}
.env-cap-eyebrow{font-family:'Inter',sans-serif;font-size:0.8rem;letter-spacing:.15em;text-transform:uppercase;color:var(--gold-l);margin-bottom:8px}
.env-cap-title{font-family:'Dancing Script',cursive;font-size:3.5rem;font-weight:700;color:var(--paper);text-shadow:0 2px 15px rgba(197,160,89,0.3);}
.env-hint{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:24px;font-family:'Inter',sans-serif;font-size:.7rem;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--gold);animation:hintPulse 2.5s ease-in-out infinite;pointer-events:none;}
.hint-icon{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;animation:hintBounce 2s ease-in-out infinite;}
@keyframes hintPulse{0%,100%{opacity:.5}50%{opacity:1}}
@keyframes hintBounce{0%,100%{transform:translateY(-2px)}50%{transform:translateY(3px)}}

/* ═══════════════════════════════════════
   MAIN
   ═══════════════════════════════════════ */
#main{
  position:relative;z-index:10;
  opacity:0;visibility:hidden;
  transition:opacity 1.5s var(--ease) .3s, visibility 1.5s;
  height:100vh;display:flex;
}
#main.show{opacity:1;visibility:visible}

.desk-surface{
  flex:1;display:flex;align-items:center;justify-content:center;
  position:relative;overflow:hidden;
}

.book-layout{
  display:flex;align-items:center;justify-content:center;gap:30px;
  width:100%;max-width:1100px;height:100%;padding:20px;
}

/* ═══════════════════════════════════════
   SIDE PANELS
   ═══════════════════════════════════════ */
.side-panel{
  flex:0 0 140px;
  display:flex;align-items:center;justify-content:center;
  transition: opacity 0.6s;
  cursor:pointer;
}
.side-panel.hidden{opacity:0;pointer-events:none;}

.sp-inner{display:flex;flex-direction:column;align-items:center;gap:10px;text-align:center;}
.left-panel .sp-inner{align-items:flex-end;text-align:right;}
.right-panel .sp-inner{align-items:flex-start;text-align:left;}

.sp-arrow{
  font-family:'Playfair Display',serif;
  font-size:2.5rem;color:var(--gold);line-height:1;
  opacity:0.4;transition:opacity 0.3s,transform 0.3s;
}
.side-panel:hover .sp-arrow{opacity:0.8;}
.left-panel:hover .sp-arrow{transform:translateX(-4px);}
.right-panel:hover .sp-arrow{transform:translateX(4px);}

.sp-label{
  font-family:'Inter',sans-serif;font-size:0.6rem;
  font-weight:600;letter-spacing:0.15em;text-transform:uppercase;
  color:var(--gold-l);opacity:0.5;
}
.sp-title{
  font-family:'Dancing Script',cursive;font-size:1.1rem;
  font-weight:700;color:var(--gold);
  max-width:120px;line-height:1.3;
}

/* ═══════════════════════════════════════
   BOOK
   ═══════════════════════════════════════ */
.book-wrapper{
  flex:0 1 500px;
  height:calc(100vh - 60px);max-height:760px;
  position:relative;
  perspective:2000px;
}

/* Leather Spine */
.book-spine{
  position:absolute;
  left:-16px;top:-2px;bottom:-2px;
  width:16px;z-index:20;
  background:linear-gradient(to right,#5C3A1E 0%,#7A5233 30%,#6B4528 60%,#5C3A1E 100%);
  border-radius:4px 0 0 4px;
  box-shadow:
    -3px 0 10px rgba(0,0,0,0.35),
    inset 2px 0 3px rgba(255,255,255,0.06),
    inset -1px 0 2px rgba(0,0,0,0.2);
}
.book-spine::before{
  content:'';position:absolute;
  top:20px;bottom:20px;left:3px;right:3px;
  border-top:1px solid rgba(197,160,89,0.25);
  border-bottom:1px solid rgba(197,160,89,0.25);
}
.book-spine::after{
  content:'';position:absolute;
  top:50%;left:50%;
  width:7px;height:7px;
  border:1px solid rgba(197,160,89,0.3);
  transform:translate(-50%,-50%) rotate(45deg);
}

/* Page Edges */
.page-edges{
  position:absolute;
  right:-9px;top:4px;bottom:4px;
  width:9px;z-index:0;
  display:flex;flex-direction:row;
  border-radius:0 3px 3px 0;
  overflow:hidden;
}
.pe{
  flex:1;
  background:var(--paper-edge);
  border-right:1px solid rgba(0,0,0,0.04);
}
.pe:last-child{border-right:1px solid rgba(0,0,0,0.08);}

.book{
  position:relative;
  width:100%;height:100%;
  transform-style:preserve-3d;
}

/* ═══════════════════════════════════════
   PAGE — The Heart of Realism
   ═══════════════════════════════════════ */
.page{
  position:absolute;inset:0;
  overflow:hidden; /* Prevent scrollbar flash during flip */
  transform-origin:left center;
  /* ONLY transform transitions — NO opacity transitions */
  transition:
    transform 1.1s var(--flip),
    box-shadow 1.1s var(--flip);
  backface-visibility:visible;
  /* Soft paper edges */
  border-radius:0 4px 4px 0;
  /* ALL pages always opacity:1 — 3D rotation handles visibility */
  opacity:1;
}

/* Scrollbar - only active on current page */
.page.current{overflow-y:auto;overflow-x:hidden;}
.page::-webkit-scrollbar{width:3px;}
.page::-webkit-scrollbar-track{background:transparent;}
.page::-webkit-scrollbar-thumb{background:rgba(139,105,20,0.15);border-radius:3px;}

/* Paper layer */
.page-paper{
  min-height:100%;
  position:relative;
  background:var(--paper);
  background-image:
    /* Faint horizontal ruled lines (notebook feel) */
    repeating-linear-gradient(
      0deg,
      transparent, transparent 30px,
      rgba(139,105,20,0.012) 30px,
      rgba(139,105,20,0.012) 31px
    ),
    /* Warm light from top-left corner */
    radial-gradient(ellipse at 15% 8%, rgba(255,250,235,0.9) 0%, transparent 55%),
    /* Slight age tint at edges */
    radial-gradient(ellipse at center, transparent 55%, rgba(197,160,89,0.04) 100%);
  /* Soft inner edges */
  border-radius:0 4px 4px 0;
}

/* Soft spine shadow (inner gutter) — very diffuse */
.page-paper::before{
  content:'';position:absolute;
  top:0;bottom:0;left:0;width:50px;
  background:linear-gradient(to right,
    rgba(0,0,0,0.06) 0%,
    rgba(0,0,0,0.025) 30%,
    rgba(0,0,0,0.008) 60%,
    transparent 100%
  );
  pointer-events:none;z-index:5;
  border-radius:0;
}

/* Ornamental Corners — thin & delicate */
.page-corner{position:absolute;width:20px;height:20px;z-index:6;pointer-events:none;opacity:0.5;}
.page-corner.tl{top:16px;left:16px;border-top:1px solid var(--gold);border-left:1px solid var(--gold);}
.page-corner.tr{top:16px;right:16px;border-top:1px solid var(--gold);border-right:1px solid var(--gold);}
.page-corner.bl{bottom:16px;left:16px;border-bottom:1px solid var(--gold);border-left:1px solid var(--gold);}
.page-corner.br{bottom:16px;right:16px;border-bottom:1px solid var(--gold);border-right:1px solid var(--gold);}

/* Page Curl hint — very subtle dog-ear */
.page-curl{
  position:absolute;bottom:0;right:0;
  width:28px;height:28px;z-index:15;
  pointer-events:none;
  opacity:0;
  transition:opacity 0.5s;
  overflow:hidden;
}
.page-curl::before{
  content:'';position:absolute;
  bottom:0;right:0;
  width:40px;height:40px;
  background:linear-gradient(
    135deg,
    transparent 48%,
    rgba(139,105,20,0.06) 48%,
    var(--paper-edge) 52%,
    var(--paper-edge) 100%
  );
  border-top-left-radius:8px;
  box-shadow:-1px -1px 3px rgba(0,0,0,0.04);
}
.page.current .page-curl{opacity:1;}

.page-content{
  padding:50px 40px 40px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  min-height:100%;
  position:relative;z-index:2;
}

/* ═══════════════════════════════════════
   PAGE STATES — Pure 3D, No Opacity Pop
   ═══════════════════════════════════════ */
.page.past{
  transform:perspective(1200px) rotateY(-180deg);
  opacity:0;visibility:hidden;
  box-shadow:none;
}

.page.current{
  transform:perspective(1200px) rotateY(0deg);
  /* Soft, diffuse shadow — like paper resting on desk */
  box-shadow:
    2px 0 8px rgba(0,0,0,0.06),
    8px 0 25px rgba(0,0,0,0.08),
    0 8px 30px rgba(0,0,0,0.1);
}

.page.future{
  transform:perspective(1200px) rotateY(0deg);
  box-shadow:none;
}

/* During active flip — dynamic shadow that follows the page curl */
.page.flipping{
  box-shadow:
    -8px 0 20px rgba(0,0,0,0.15),
    -20px 0 50px rgba(0,0,0,0.1),
    0 10px 40px rgba(0,0,0,0.12);
}

/* ═══════════════════════════════════════
   CONTENT ELEMENTS
   ═══════════════════════════════════════ */
.hero-tag{
  font-family:'Inter',sans-serif;font-size:0.72rem;font-weight:600;
  letter-spacing:.25em;text-transform:uppercase;color:var(--gold-d);
  margin-bottom:28px;
}
.guest-block{margin-bottom:20px;}
.guest-sal{font-family:'Playfair Display',serif;font-size:1.25rem;font-style:italic;color:var(--muted);margin-bottom:6px;}
.guest-nm{font-family:'Dancing Script',cursive;font-size:2.6rem;font-weight:700;color:var(--ink);line-height:1.2;}
.guest-nm:empty{display:none}

.ornament{color:var(--gold);margin:14px 0;opacity:0.4;}
.ornament svg{width:90px;height:14px;}

.name-block{margin-bottom:14px;text-align:center;}
.name-honor{font-family:'Inter',sans-serif;font-size:.62rem;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--muted);margin-bottom:10px;}
.grad-name{
  font-family:'Dancing Script',cursive;font-size:4.2rem;line-height:1.1;
  display:block;color:var(--ink);font-weight:700;
}
.hero-sub{
  font-family:'Playfair Display',serif;font-size:0.95rem;font-style:italic;
  color:var(--ink-l);line-height:1.7;margin-bottom:24px;text-align:center;
}

.chips{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;}
.chip{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;
  border:1px solid var(--border);background:transparent;
  font-family:'Inter',sans-serif;font-size:.78rem;font-weight:500;color:var(--ink-l);
  cursor:pointer;transition:all .3s;border-radius:2px;
}
.chip-dot{width:4px;height:4px;background:var(--gold-d);transform:rotate(45deg);}
.chip:hover{border-color:var(--border-s);background:rgba(139,105,20,0.05);}

.eyebrow{display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:14px;width:100%;}
.ey-l,.ey-r{flex:1;max-width:36px;height:1px;background:var(--border);}
.ey-txt{font-family:'Inter',sans-serif;font-size:.68rem;font-weight:600;letter-spacing:.25em;text-transform:uppercase;color:var(--gold-d);text-align:center;white-space:nowrap;}

.sec-h{
  font-family:'Dancing Script',cursive;font-size:2.8rem;font-weight:700;
  color:var(--ink);text-align:center;line-height:1.1;width:100%;
}
.sec-h em{
  font-family:'Playfair Display',serif;font-style:italic;font-size:1.6rem;
  color:var(--gold-d);font-weight:600;display:block;margin-top:4px;
}

.sep{display:flex;align-items:center;justify-content:center;gap:10px;padding:14px 0 22px;width:100%;}
.sp-l,.sp-r{flex:1;max-width:60px;height:1px;background:var(--border);}
.sp-d{width:5px;height:5px;background:var(--gold-d);transform:rotate(45deg);}
.sp-d.sm{width:3px;height:3px;background:rgba(139,105,20,0.25);}

/* Event */
.ev-grid{display:flex;flex-direction:column;gap:14px;width:100%;}
.ev-cell{padding:18px;border:1px solid var(--border);background:transparent;text-align:center;border-radius:2px;}
.ev-icon{margin-bottom:8px;color:var(--gold-d);}
.ev-icon svg{width:26px;height:26px;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
.ev-lbl{font-family:'Inter',sans-serif;font-size:.68rem;font-weight:600;letter-spacing:.15em;text-transform:uppercase;color:var(--muted);margin-bottom:5px}
.ev-val{font-family:'Playfair Display',serif;font-size:1.1rem;font-weight:600;color:var(--ink);line-height:1.3;}
.ev-sub{font-family:'Inter',sans-serif;font-size:.82rem;color:var(--muted);margin-top:3px;}
.addr-box{padding:18px;text-align:center;border:1px solid var(--border);margin-top:14px;width:100%;border-radius:2px;}
.addr-text{font-family:'Playfair Display',serif;font-size:1rem;color:var(--ink);margin-top:5px;line-height:1.5;}
.map-link{display:inline-flex;align-items:center;gap:8px;margin-top:12px;padding:7px 14px;border:1px solid var(--border);font-family:'Inter',sans-serif;font-size:.68rem;font-weight:600;letter-spacing:.15em;text-transform:uppercase;color:var(--gold-d);text-decoration:none;transition:all .3s;border-radius:2px;}
.map-link:hover{border-color:var(--border-s);background:rgba(139,105,20,0.05);}
.map-link svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.5;}

/* Countdown */
.cd-row{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;}
.cd-unit{display:flex;flex-direction:column;align-items:center;gap:6px}
.cd-card{
  width:54px;height:62px;
  border:1px solid var(--border);background:transparent;
  display:flex;align-items:center;justify-content:center;border-radius:2px;
}
.cd-num{font-family:'Playfair Display',serif;font-size:1.9rem;font-weight:600;color:var(--ink);line-height:1;}
.cd-lbl{font-family:'Inter',sans-serif;font-size:.58rem;font-weight:600;letter-spacing:.15em;text-transform:uppercase;color:var(--muted);}
.cd-sep{font-family:'Playfair Display',serif;font-size:1.1rem;color:rgba(139,105,20,0.3);line-height:1;margin-top:-14px;}

/* Timeline */
.tl{width:100%;position:relative;padding-left:10px;}
.tl::before{content:'';position:absolute;left:62px;top:8px;bottom:8px;width:1px;background:var(--border);}
.tl-item{display:grid;grid-template-columns:52px 1fr;gap:0 20px;position:relative;padding-bottom:20px;}
.tl-item:last-child{padding-bottom:0}
.tl-dot{
  position:absolute;left:62px;top:6px;transform:translateX(-50%) rotate(45deg);
  width:8px;height:8px;background:var(--gold-d);
}
.tl-t{font-family:'Playfair Display',serif;font-size:1.1rem;font-weight:700;color:var(--gold-d);text-align:right;padding-top:1px;}
.tl-body{padding-left:18px;}
.tl-title{font-family:'Playfair Display',serif;font-size:1.05rem;font-weight:600;color:var(--ink);margin-bottom:2px;}
.tl-desc{font-size:.82rem;color:var(--muted);line-height:1.5;}

/* RSVP */
.card-form{width:100%;}
.ro-wrap{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:14px}
.ro{position:relative}
.ro input{position:absolute;opacity:0;}
.ro label{
  display:flex;align-items:center;justify-content:center;gap:6px;
  padding:9px;border:1px solid var(--border);background:transparent;
  font-family:'Playfair Display',serif;font-size:.95rem;font-weight:500;
  color:var(--muted);cursor:pointer;transition:all .3s;border-radius:2px;
}
.ro input:checked+label{border-color:var(--gold-d);color:var(--gold-d);background:rgba(139,105,20,0.05);}
.ro label svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.5;}
.fg{margin-bottom:12px;text-align:left;width:100%;}
.fg label{display:block;font-family:'Inter',sans-serif;font-size:.62rem;font-weight:600;letter-spacing:.15em;text-transform:uppercase;color:var(--gold-d);margin-bottom:5px}
.fg input,.fg textarea{
  width:100%;padding:9px 12px;background:transparent;
  border:1px solid var(--border);color:var(--ink);
  font-family:'Playfair Display',serif;font-size:.95rem;
  outline:none;transition:all .3s;border-radius:2px;
}
.fg textarea{min-height:65px;resize:vertical;}
.fg input:focus,.fg textarea:focus{border-color:var(--border-s);}
.fg input::placeholder,.fg textarea::placeholder{color:rgba(122,110,93,0.4);font-style:italic;}
.rsvp-btn{
  width:100%;padding:11px;background:var(--gold-d);border:none;
  font-family:'Inter',sans-serif;font-size:.78rem;font-weight:600;
  letter-spacing:.2em;text-transform:uppercase;color:var(--paper);
  cursor:pointer;transition:all .3s;border-radius:2px;
}
.rsvp-btn:hover{background:var(--gold);}
.rsvp-ok{display:none;text-align:center;padding:20px 0}
.rsvp-ok.show{display:block;animation:fadeIn .6s var(--ease)}
.rok-icon{font-size:2.2rem;color:var(--gold-d);margin-bottom:10px;}
.rok-title{font-family:'Dancing Script',cursive;font-size:2rem;font-weight:700;color:var(--ink);margin-bottom:6px;}
.rok-txt{font-family:'Playfair Display',serif;font-size:.95rem;font-style:italic;color:var(--muted);line-height:1.6;}

/* Footer */
.quote-txt{
  font-family:'Playfair Display',serif;font-size:.95rem;font-style:italic;
  color:var(--ink-l);line-height:1.8;text-align:center;margin-bottom:20px;
}
.sig-block{text-align:center;margin:8px 0 28px;}
.sig-from{font-family:'Playfair Display',serif;font-size:.95rem;font-style:italic;color:var(--muted);margin-bottom:4px;}
.sig-name{font-family:'Dancing Script',cursive;font-size:3.5rem;font-weight:700;color:var(--ink);line-height:1.1;}

.act-row{display:flex;gap:8px;width:100%;flex-wrap:wrap;}
.act-btn{
  flex:1;min-width:130px;
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:9px 14px;border:1px solid var(--border);background:transparent;
  font-family:'Inter',sans-serif;font-size:.68rem;font-weight:600;
  letter-spacing:.1em;text-transform:uppercase;color:var(--gold-d);
  cursor:pointer;transition:all .3s;border-radius:2px;
}
.act-btn svg{width:14px;height:14px;stroke:currentColor;fill:none;}
.act-btn:hover{border-color:var(--border-s);background:rgba(139,105,20,0.05);}

.footer-txt{font-family:'Inter',sans-serif;font-size:.6rem;color:var(--muted);text-align:center;margin-top:28px;opacity:0.5;}

@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}

/* Toast */
.toast{
  position:fixed;bottom:30px;right:30px;z-index:9990;padding:12px 20px;
  background:var(--paper);border:1px solid var(--border-s);border-radius:3px;
  font-family:'Playfair Display',serif;font-size:.95rem;color:var(--gold-d);
  transform:translateX(150%);transition:transform .4s var(--ease);
  box-shadow:0 10px 30px rgba(0,0,0,0.25);
}
.toast.show{transform:translateX(0)}

/* Fact Modal */
.fact-modal{position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,0.6);backdrop-filter:blur(5px);opacity:0;visibility:hidden;transition:all 0.4s;}
.fact-modal.show{opacity:1;visibility:visible}
.fact-box{background:var(--paper);border-radius:4px;padding:36px 28px;max-width:380px;width:88%;text-align:center;transform:translateY(20px) scale(0.95);transition:all 0.4s;box-shadow:0 20px 60px rgba(0,0,0,0.35);}
.fact-modal.show .fact-box{transform:translateY(0) scale(1)}
.fact-badge{font-family:'Inter',sans-serif;font-size:0.68rem;font-weight:600;letter-spacing:0.15em;text-transform:uppercase;color:var(--gold-d);margin-bottom:12px;}
.fact-q{font-family:'Dancing Script',cursive;font-size:1.8rem;font-weight:700;color:var(--ink);margin-bottom:8px;line-height:1.2;}
.fact-a{font-family:'Playfair Display',serif;font-size:1rem;font-style:italic;color:var(--muted);line-height:1.7;margin-bottom:18px;}
.fact-close{background:transparent;border:1px solid var(--border);border-radius:2px;padding:7px 18px;color:var(--gold-d);font-family:'Inter',sans-serif;font-size:0.68rem;font-weight:600;letter-spacing:0.15em;text-transform:uppercase;cursor:pointer;transition:all 0.3s;}
.fact-close:hover{border-color:var(--border-s);background:rgba(139,105,20,0.05);}

/* ═══════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════ */
@media(max-width:900px){
  .side-panel{flex:0 0 80px;}
  .sp-title{font-size:0.9rem;}
  .sp-arrow{font-size:2rem;}
  .book-wrapper{flex:1;max-width:none;}
}
@media(max-width:640px){
  .side-panel{display:none;}
  .book-layout{padding:15px;gap:0;}
  .book-wrapper{flex:1;max-width:none;height:calc(100vh - 30px);}
  .page-content{padding:40px 20px 24px;}
  .grad-name{font-size:2.6rem;}
  .sec-h{font-size:2rem;}
  .sec-h em{font-size:1.2rem;}
  .guest-nm{font-size:1.8rem;}
  .sig-name{font-size:2.5rem;}
  .book-spine{left:-10px;width:10px;}
  .page-edges{right:-5px;width:5px;}
  .cd-card{width:40px;height:48px;}
  .cd-num{font-size:1.3rem;}
  
  /* Swipe hint on mobile */
  .page:not([data-page="7"]) .page-content::after {
    content: '\2190   Vuốt để xem tiếp';
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    font-family: 'Inter', sans-serif;
    font-size: 0.55rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--gold-d);
    pointer-events: none;
    white-space: nowrap;
    animation: swipeHintPulse 2s infinite ease-in-out;
  }
}
@keyframes swipeHintPulse {
  0%, 100% { opacity: 0.2; transform: translateX(-50%); }
  50% { opacity: 0.6; transform: translateX(calc(-50% - 5px)); }
}

/* ═══════════════════════════════════════
   DUST WIPE OVERLAY (Scratch Card)
   ═══════════════════════════════════════ */
.dust-layer{
  position:absolute;inset:0;
  z-index:60;
  cursor:crosshair;
  border-radius:4px;
  transition:opacity 0.8s ease;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15), inset 0 0 0 1px rgba(139,105,20,0.2);
}
.dust-layer:active{cursor:crosshair;}
.dust-layer.cleared{
  opacity:0;
  pointer-events:none;
}
.dust-hint{
  z-index:61;
  pointer-events:none;
  text-align:center;
  animation:dustHintPulse 2s ease-in-out infinite;
  transition: opacity 0.5s ease;
}
.dust-hint span{
  font-family:'Inter',sans-serif;
  font-size:0.6rem;font-weight:600;
  letter-spacing:0.1em;text-transform:uppercase;
  color:var(--gold-d);
  background:var(--paper);
  padding:2px 8px;
  border-radius:10px;
  border:1px solid var(--border);
}
.dust-hint.hidden{opacity:0;}

/* ═══════════════════════════════════════
   COVER LOCK & CHAINS
   ═══════════════════════════════════════ */
.cover-locked .hero-tag,
.cover-locked .ornament,
.cover-locked .chips,
.cover-locked::after {
  filter: blur(8px);
  opacity: 0.3;
  pointer-events: none;
}

.hero-tag, .ornament, .chips {
  transition: filter 1.5s ease, opacity 1.5s ease;
}

#cover-overlay {
  position: absolute;
  inset: 0;
  z-index: 20;
  pointer-events: none;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

.cover-chain {
  position: absolute;
  width: 150%;
  height: 10px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 10' width='20' height='10'%3E%3Ccircle cx='5' cy='5' r='4' fill='none' stroke='%23C5A059' stroke-width='1'/%3E%3Ccircle cx='15' cy='5' r='4' fill='none' stroke='%23C5A059' stroke-width='1'/%3E%3C/svg%3E");
  background-repeat: repeat-x;
  background-size: 20px 10px;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
  transition: transform 1.5s cubic-bezier(0.68, -0.55, 0.265, 1.55), opacity 1s ease;
}

.chain-tl-br {
  transform: rotate(45deg);
}

.chain-tr-bl {
  transform: rotate(-45deg);
}

#cover-padlock {
  position: relative;
  z-index: 21;
  color: #1a1a1a;
  filter: drop-shadow(0 8px 20px rgba(0,0,0,0.8));
  pointer-events: auto;
  transition: transform 1.2s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 1s ease;
}

/* Unlocked state */
body.cover-unlocked #cover-overlay .chain-tl-br {
  transform: rotate(45deg) translateY(120vh);
  opacity: 0;
}

body.cover-unlocked #cover-overlay .chain-tr-bl {
  transform: rotate(-45deg) translateY(120vh);
  opacity: 0;
}

body.cover-unlocked #cover-overlay #cover-padlock {
  transform: scale(2) translateY(50vh) rotate(20deg);
  opacity: 0;
}

@keyframes dustHintPulse{
  0%,100%{opacity:0.5; transform:translateY(0);}
  50%{opacity:1; transform:translateY(-3px);}
}

@keyframes keyGlow {
  0%, 100% { transform: scale(1); filter: drop-shadow(0 0 2px rgba(197, 160, 89, 0.5)); }
  50% { transform: scale(1.15); filter: drop-shadow(0 0 10px rgba(197, 160, 89, 1)); color: #fff; }
}
.key-glow {
  animation: keyGlow 1.5s infinite ease-in-out;
}

.dust-hint.hidden{display:none;}