:root { --red:#8e1d1d; --deep:#391311; --gold:#d5a84d; --paper:#f2e6c8; --ink:#2f251d; --jade:#1f594b; }
*{box-sizing:border-box} html,body{min-height:100%;margin:0} button{font:inherit}
body{background:radial-gradient(circle at 50% -20%,#ab3630 0,#681a18 36%,#2b1010 100%);color:var(--paper);font-family:"Noto Serif TC",serif;overflow-x:hidden}
body:before,body:after{content:"";position:fixed;inset:0;pointer-events:none}
body:before{background:linear-gradient(90deg,transparent 49.7%,rgba(229,183,87,.12) 50%,transparent 50.3%),repeating-linear-gradient(0deg,transparent 0 95px,rgba(255,220,151,.035) 96px 97px)}
.paper-noise{position:fixed;inset:0;opacity:.16;pointer-events:none;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.45'/%3E%3C/svg%3E")}
.game-shell{width:min(1120px,calc(100% - 32px));margin:auto;min-height:100vh;padding:24px 0 18px;position:relative;z-index:1;display:flex;flex-direction:column}
.masthead{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:22px;border-bottom:1px solid rgba(242,230,200,.32);padding-bottom:18px}.seal-mark{width:74px;height:74px;border:2px solid var(--gold);display:grid;grid-template-columns:1fr 1fr;place-items:center;color:var(--gold);font-size:22px;font-weight:900;transform:rotate(-3deg);box-shadow:inset 0 0 0 4px var(--red),inset 0 0 0 5px var(--gold)}
.title-block h1{font-size:clamp(32px,5vw,58px);line-height:1;margin:4px 0 7px;letter-spacing:.13em}.kicker,.modal-eyebrow{margin:0;color:#efc66f;font-size:13px;letter-spacing:.28em}.subtitle{margin:0;color:#ddcbaa;font-size:14px}.sound-button,.text-button,.secondary-button{border:0;background:transparent;color:#ecd7aa;cursor:pointer}.sound-button{border-left:1px solid rgba(242,230,200,.25);padding:10px 0 10px 22px;font-size:12px;letter-spacing:.12em}.sound-button span{display:block;color:var(--gold);font-size:15px;margin-top:2px}
.status-bar{display:grid;grid-template-columns:auto 1fr auto auto;align-items:center;gap:22px;margin:17px 0}.status-label{display:block;font-size:11px;color:#cdbb98;letter-spacing:.18em}.timer-wrap strong{font-size:32px;color:#fff}.timer-wrap small{margin-left:4px}.incense-track{height:5px;background:#431514;border-radius:10px;overflow:hidden}.incense-track span{display:block;width:100%;height:100%;background:linear-gradient(90deg,#b73c30,#f1c367);box-shadow:0 0 12px #e9ad45;transition:width .3s linear}.matched-wrap strong,.moves-wrap strong{font-size:19px}.moves-wrap{padding-left:20px;border-left:1px solid rgba(242,230,200,.22)}
.board-wrap{flex:1;display:grid;place-items:center}.game-board{width:min(100%,920px);display:grid;grid-template-columns:repeat(4,1fr);gap:13px;perspective:1000px}.card{aspect-ratio:1.35;border:0;padding:0;background:transparent;cursor:pointer;perspective:900px;animation:deal .5s both}.card-inner{position:relative;width:100%;height:100%;transition:transform .48s cubic-bezier(.2,.75,.25,1.15);transform-style:preserve-3d}.card.flipped .card-inner,.card.matched .card-inner{transform:rotateY(180deg)}.card-face{position:absolute;inset:0;backface-visibility:hidden;border-radius:5px}.card-back{display:grid;place-items:center;background:linear-gradient(135deg,#9f2824,#6c1716);border:1px solid #d8ad57;box-shadow:0 7px 15px rgba(20,4,3,.32),inset 0 0 0 5px #861e1b,inset 0 0 0 6px rgba(231,189,97,.7)}.card-back:before{content:"昌";display:grid;place-items:center;width:45%;aspect-ratio:1;border:1px solid #d8ad57;color:#e6bf68;font-size:clamp(22px,4vw,40px);font-weight:900;transform:rotate(45deg)}.card-back:after{content:"";position:absolute;inset:12px;border:1px solid rgba(244,206,121,.32)}.card-front{transform:rotateY(180deg);background:linear-gradient(145deg,#f5ecd7,#dfcfa7);color:var(--ink);border:1px solid #f8dea2;box-shadow:0 9px 18px rgba(20,4,3,.3);padding:12px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;overflow:hidden}.card-front:after{content:"";position:absolute;inset:6px;border:1px solid rgba(126,31,27,.25);pointer-events:none}.card-type{font-size:10px;color:#9b342e;letter-spacing:.2em;margin-bottom:7px}.card-main{font-size:clamp(15px,2.3vw,22px);font-weight:900;line-height:1.35}.card-detail{font-family:"Zen Kurenaido",serif;font-size:clamp(12px,1.6vw,16px);line-height:1.4;margin-top:5px}.card.matched .card-front{background:linear-gradient(145deg,#eaf0d7,#bfd1aa);border-color:#cde39d}.card.matched{cursor:default}.card.wrong{animation:shake .38s}.card:focus-visible{outline:3px solid #f7cd72;outline-offset:3px}
.game-footer{display:flex;justify-content:space-between;align-items:center;gap:20px;padding-top:15px;font-size:13px;color:#d7c7a8}.text-button{text-decoration:underline;text-underline-offset:5px}
.modal{position:fixed;inset:0;z-index:20;background:rgba(26,7,6,.72);backdrop-filter:blur(7px);display:none;place-items:center;padding:20px}.modal.open{display:grid}.modal-card{width:min(520px,100%);background:linear-gradient(145deg,#f8efd9,#ddcda4);color:var(--ink);border:1px solid #f2ca71;box-shadow:0 30px 90px #170403;padding:38px;position:relative;text-align:center;animation:rise .45s both}.modal-card:before{content:"";position:absolute;inset:8px;border:1px solid rgba(113,34,29,.28);pointer-events:none}.modal-card h2{font-size:clamp(25px,5vw,38px);margin:8px 0 22px}.modal-card .modal-eyebrow{color:var(--red)}.rules{display:grid;gap:9px;text-align:left;margin:22px 0 26px}.rules div{display:flex;align-items:center;gap:13px;border-bottom:1px solid rgba(70,42,25,.15);padding:7px}.rules b{color:var(--red);font-size:19px}.primary-button{border:0;background:var(--red);color:#fff4d7;padding:13px 34px;min-width:190px;cursor:pointer;box-shadow:4px 4px 0 #d5a84d;letter-spacing:.15em;font-weight:700}.secondary-button{display:block;color:#6e4230;margin:18px auto 0;text-decoration:underline;text-underline-offset:4px}.result-seal{width:100px;height:100px;border:4px double var(--red);color:var(--red);font-size:23px;font-weight:900;display:grid;place-items:center;margin:-10px auto 18px;transform:rotate(-6deg);border-radius:50%}.result-stats{display:flex;justify-content:center;gap:32px;margin:22px 0}.result-card.fail .result-seal{filter:grayscale(1);opacity:.55}.learn-card{width:min(720px,100%)}.close-button{position:absolute;right:18px;top:14px;border:0;background:transparent;color:var(--red);font-size:30px;cursor:pointer}.pair-list{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;text-align:left}.pair-item{padding:11px 14px;background:rgba(255,255,255,.35);border-left:3px solid var(--red)}.pair-item b{display:block;color:var(--red);margin-bottom:3px}.pair-item span{font-family:"Zen Kurenaido",serif}
@keyframes deal{from{opacity:0;transform:translateY(24px) rotate(2deg)}to{opacity:1;transform:none}}@keyframes rise{from{opacity:0;transform:translateY(25px) scale(.97)}to{opacity:1;transform:none}}@keyframes shake{25%{transform:translateX(-6px)}50%{transform:translateX(6px)}75%{transform:translateX(-3px)}}
@media(max-width:700px){.game-shell{width:min(100% - 22px,620px);padding-top:14px}.masthead{grid-template-columns:auto 1fr;gap:12px}.seal-mark{width:52px;height:52px;font-size:16px}.sound-button{position:absolute;right:2px;top:8px;border:0}.title-block h1{font-size:31px}.subtitle{display:none}.status-bar{grid-template-columns:auto 1fr auto;gap:12px}.moves-wrap{display:none}.game-board{grid-template-columns:repeat(3,1fr);gap:8px}.card{aspect-ratio:1}.card-front{padding:8px}.game-footer{font-size:11px}.modal-card{padding:32px 22px}.pair-list{grid-template-columns:1fr}.learn-card{max-height:90vh;overflow:auto}}
@media(max-width:390px){.card-main{font-size:14px}.card-detail{font-size:11px}.card-type{font-size:8px}.game-board{gap:6px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}

/* Illustrated deity cards */
.card-inner{display:block;width:100%;height:100%}
.card-back{background:linear-gradient(145deg,#b83b31,#741a19);border:2px solid #e7bd66;box-shadow:0 9px 18px rgba(20,4,3,.48),inset 0 0 0 5px #8f211e,inset 0 0 0 7px rgba(248,211,128,.78)}
.card-back:after{inset:13px;border-color:rgba(255,226,157,.65)}
.deity-art{position:absolute;inset:2px 2px 23%;width:calc(100% - 4px);height:77%;object-fit:contain;filter:drop-shadow(0 4px 3px rgba(76,34,16,.24))}
.deity-art~.card-type,.deity-art~.card-detail{display:none}
.deity-art~.card-main{position:absolute;z-index:2;bottom:7px;width:calc(100% - 16px);padding:4px 2px;background:rgba(248,239,217,.9);border-top:1px solid rgba(142,29,29,.2);font-size:clamp(13px,1.8vw,18px)}
.duty-emblem{width:36px;height:36px;display:grid;place-items:center;border:1px solid var(--red);color:var(--red);transform:rotate(45deg);margin-bottom:10px;font-weight:900}
.duty-emblem b{display:block;line-height:1;transform:rotate(-45deg);font-weight:900}
.duty-emblem+*{transform:none}

/* A clear deck of twelve individual portrait cards */
.board-wrap{padding:18px 0 24px}
.game-board{width:min(100%,760px);grid-template-columns:repeat(4,minmax(0,1fr));gap:18px 16px;align-items:stretch}
.card{aspect-ratio:.72;border-radius:14px;filter:drop-shadow(0 10px 9px rgba(24,5,4,.3))}
.card-inner,.card-face{border-radius:14px}
.card-face{outline:1px solid rgba(255,222,148,.45);outline-offset:-5px}
.card-back{border:3px solid #efc96e;background:linear-gradient(150deg,#bd4035 0%,#8b211e 54%,#651514 100%);box-shadow:0 8px 0 #45100f,0 13px 20px rgba(20,4,3,.4),inset 0 0 0 7px #8f211e,inset 0 0 0 9px rgba(248,211,128,.75)}
.card-back:before{width:42%;background:rgba(105,20,18,.32);box-shadow:0 0 0 7px rgba(230,183,83,.08)}
.card-front{border:3px solid #efc96e;box-shadow:0 8px 0 #8b6d39,0 13px 20px rgba(20,4,3,.3);padding:10px}
.deity-art{inset:6px 6px 21%;width:calc(100% - 12px);height:76%}
.deity-art~.card-main{bottom:10px;width:calc(100% - 22px);border-radius:6px;padding:6px 2px}

@media(max-width:700px){
  .board-wrap{padding-top:10px}
  .game-board{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px 9px}
  .card{aspect-ratio:.68;border-radius:10px}
  .card-inner,.card-face{border-radius:10px}
  .card-back{border-width:2px;box-shadow:0 5px 0 #45100f,0 8px 12px rgba(20,4,3,.35),inset 0 0 0 4px #8f211e,inset 0 0 0 5px rgba(248,211,128,.72)}
  .card-back:after{inset:8px}
  .card-front{border-width:2px;padding:5px;box-shadow:0 5px 0 #8b6d39,0 8px 12px rgba(20,4,3,.28)}
  .deity-art~.card-main{bottom:6px;width:calc(100% - 12px);font-size:clamp(9px,2.7vw,14px);padding:4px 1px}
  .duty-emblem{width:28px;height:28px;margin-bottom:7px}
  .card-type{font-size:8px}.card-main{font-size:clamp(10px,2.8vw,15px)}.card-detail{font-size:clamp(8px,2.2vw,12px)}
}

/* Retry calculus gate */
.retry-card{width:min(560px,100%);max-height:94vh;overflow-y:auto}
.retry-card h2{margin-bottom:8px}
.retry-rule{margin:0 0 18px;color:#76543d;font-size:13px}
.calculus-panel{padding:18px;background:rgba(126,31,27,.07);border:1px solid rgba(126,31,27,.2)}
.calculus-question{margin:0 0 16px;color:#3d2419;font-size:clamp(20px,4vw,28px);font-weight:900;letter-spacing:.02em}
.calculus-answers{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}
.calculus-answers button{min-height:46px;border:1px solid var(--red);background:#fffaf0;color:var(--red);padding:9px 6px;cursor:pointer;font-weight:700;font-size:15px}
.calculus-answers button:not(:disabled):hover{background:#f0dfb9;transform:translateY(-1px)}
.calculus-answers button.correct{background:#315d4c;border-color:#315d4c;color:white}
.calculus-answers button.wrong{background:#9f2b24;border-color:#9f2b24;color:white;text-decoration:line-through}
.retry-time-section{margin:18px 0 4px;padding-top:15px;border-top:1px solid rgba(126,31,27,.2)}
.retry-time-section[hidden]{display:none}
.retry-time-section .time-options{margin-bottom:18px}

@media(max-width:480px){
  .calculus-panel{padding:13px}
  .calculus-answers{grid-template-columns:1fr;gap:7px}
  .calculus-answers button{min-height:40px}
}

/* Pre-game time choice and Guandu plaque gate */
.challenge-setup{margin:22px 0 24px;padding:18px;background:rgba(126,31,27,.07);border:1px solid rgba(126,31,27,.2)}
.intro-card{max-height:94vh;overflow-y:auto}
.setup-label{margin:0 0 10px;color:#74462f;font-size:12px;letter-spacing:.18em}
.time-options{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:18px}
.time-option[hidden]{display:none!important}.time-options .penalty-option:not([hidden]){grid-column:1/-1}
.time-option{border:1px solid rgba(126,31,27,.28);background:rgba(255,255,255,.42);color:#64422d;padding:9px 5px;cursor:pointer;transition:.2s ease}
.time-option b{font-size:22px;margin-right:3px}.time-option span{font-size:11px}
.time-option.selected{background:var(--red);border-color:var(--red);color:#fff3d5;box-shadow:3px 3px 0 var(--gold)}
.time-option:disabled{cursor:default}
.gate-quiz{border-top:1px solid rgba(126,31,27,.18);padding-top:16px}
.quiz-kicker{margin:0;color:var(--red);font-size:11px;letter-spacing:.22em}
.gate-quiz h3{margin:7px 0 13px;font-size:19px;line-height:1.5;color:#41281e}
.quiz-options{display:grid;grid-template-columns:1fr 1fr;gap:9px}
.quiz-options button{border:1px solid var(--red);background:#fffaf0;color:var(--red);padding:10px 7px;cursor:pointer;font-weight:700}
.quiz-options button:not(:disabled):hover{background:#f0dfb9;transform:translateY(-1px)}
.quiz-options button.correct{background:#315d4c;border-color:#315d4c;color:white}
.quiz-options button.wrong{background:#9f2b24;border-color:#9f2b24;color:white;text-decoration:line-through}
.quiz-feedback{min-height:20px;margin:12px 0 0;font-family:"Zen Kurenaido",serif;font-size:13px;color:#75553d}
.quiz-feedback.success{color:#315d4c;font-weight:700}.quiz-feedback.fail{color:#9f2b24;font-weight:700}
.primary-button:disabled{background:#927d68;color:#e8ddc9;box-shadow:none;cursor:not-allowed}

@media(max-width:480px){
  .challenge-setup{margin:15px 0 18px;padding:13px}
  .gate-quiz h3{font-size:16px}
  .time-option b{font-size:18px}
  .quiz-options button{font-size:13px;padding:9px 4px}
}

/* 2026 Guandu Coming-of-Age Ceremony identity */
.seal-mark.event-logo{width:92px;height:76px;display:flex;flex-direction:column;justify-content:center;gap:3px;padding:6px;line-height:1;text-align:center;transform:rotate(-2deg)}
.event-logo .event-year{font-size:17px;letter-spacing:.08em}
.event-logo .event-name{font-size:13px;letter-spacing:.08em;white-space:nowrap}
.card-back:before{content:"2026\A關渡成年禮";white-space:pre;display:flex;align-items:center;justify-content:center;width:72%;height:38%;aspect-ratio:auto;padding:7px 5px;border:1px solid #e4b951;background:rgba(105,20,18,.42);box-shadow:0 0 0 6px rgba(230,183,83,.08);color:#f1cc73;font-size:clamp(12px,1.55vw,20px);line-height:1.45;letter-spacing:.08em;text-align:center;transform:none}

@media(max-width:700px){
  .seal-mark.event-logo{width:70px;height:57px;padding:4px}
  .event-logo .event-year{font-size:13px}
  .event-logo .event-name{font-size:10px}
  .card-back:before{width:76%;height:34%;padding:4px 2px;font-size:clamp(8px,2.4vw,12px);line-height:1.35;box-shadow:0 0 0 3px rgba(230,183,83,.08)}
}

/* Simplified card back: one edge, no nested frames */
.card-back{border:2px solid #e8bd5f;outline:none;background:linear-gradient(155deg,#b83b32 0%,#8b211e 48%,#681615 100%);box-shadow:0 7px 0 #4a1110,0 12px 20px rgba(20,4,3,.38)}
.card-back:after{display:none}
.card-back:before{width:auto;height:auto;min-width:0;padding:0;border:0;background:transparent;box-shadow:none;color:#f2cd74;font-size:clamp(14px,1.7vw,22px);line-height:1.55;letter-spacing:.1em;text-shadow:0 2px 0 rgba(70,14,12,.55);transform:none}

@media(max-width:700px){
  .card-back{border-width:2px;box-shadow:0 4px 0 #4a1110,0 8px 12px rgba(20,4,3,.32)}
  .card-back:before{width:auto;height:auto;padding:0;font-size:clamp(9px,2.5vw,13px);line-height:1.45;box-shadow:none}
}

/* Unified typography and final responsive system */
button,input,select,textarea,.card-detail,.pair-item span,.quiz-feedback{font-family:inherit}
body{font-family:"Noto Serif TC","Source Han Serif TC","Songti TC","PMingLiU",serif}
.game-shell{min-height:100dvh}
.masthead,.status-bar,.game-board,.modal-card{min-width:0}
.title-block,.incense-track{min-width:0}

/* Tablet */
@media(min-width:600px) and (max-width:900px){
  .game-shell{width:min(100% - 32px,820px)}
  .masthead{gap:16px}
  .title-block h1{font-size:clamp(36px,6vw,48px)}
  .game-board{width:min(100%,700px);grid-template-columns:repeat(4,minmax(0,1fr));gap:16px 13px}
  .modal-card{max-height:calc(100dvh - 32px);overflow-y:auto}
}

/* Phone */
@media(max-width:599px){
  .game-shell{width:calc(100% - 20px);padding:12px 0 16px}
  .masthead{grid-template-columns:64px minmax(0,1fr);gap:10px;padding:0 0 13px}
  .seal-mark.event-logo{width:64px;height:54px}
  .event-logo .event-year{font-size:12px}
  .event-logo .event-name{font-size:9px}
  .title-block{padding-right:48px}
  .title-block h1{font-size:clamp(25px,8vw,32px);line-height:1.12;letter-spacing:.06em;white-space:nowrap}
  .kicker{font-size:10px;letter-spacing:.12em;white-space:nowrap}
  .sound-button{top:4px;right:0;width:44px;padding:8px 0;font-size:10px;text-align:center}
  .sound-button span{font-size:13px}
  .status-bar{grid-template-columns:auto minmax(70px,1fr) auto;gap:10px;margin:14px 0 8px}
  .timer-wrap strong{font-size:30px}.matched-wrap strong{font-size:17px}
  .status-label{font-size:9px;letter-spacing:.1em}
  .board-wrap{padding:12px 0 20px}
  .game-board{width:100%;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px 9px}
  .card{aspect-ratio:.68;border-radius:10px;filter:drop-shadow(0 7px 6px rgba(24,5,4,.28))}
  .card-back:before{font-size:clamp(11px,3.4vw,14px)}
  .deity-art~.card-main{font-size:clamp(11px,3.3vw,14px)}
  .card-main{font-size:clamp(12px,3.5vw,15px)}
  .card-detail{font-size:clamp(10px,2.9vw,12px)}
  .game-footer{align-items:flex-start;font-size:11px;line-height:1.55}
  .modal{padding:max(10px,env(safe-area-inset-top)) 10px max(10px,env(safe-area-inset-bottom));place-items:center}
  .modal-card,.intro-card,.retry-card,.learn-card{width:100%;max-height:calc(100dvh - 20px);padding:24px 16px;overflow-y:auto}
  .modal-card h2{font-size:clamp(24px,7vw,30px);margin-bottom:16px}
  .rules{margin:16px 0 18px}.rules div{padding:6px 4px}
  .challenge-setup{margin:14px 0 16px;padding:12px}
  .primary-button{width:min(100%,260px);min-width:0}
}

@media(max-width:350px){
  .game-shell{width:calc(100% - 14px)}
  .masthead{grid-template-columns:56px minmax(0,1fr);gap:7px}
  .seal-mark.event-logo{width:56px;height:50px}
  .title-block{padding-right:42px}
  .title-block h1{font-size:24px}
  .kicker{font-size:9px}
  .game-board{gap:10px 6px}
}

/* LINE and other in-app WebView compatibility */
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;height:100%;overscroll-behavior-y:none}
body{min-height:100%;font-synthesis:none}
body.modal-active{overflow:hidden}
button{touch-action:manipulation;-webkit-tap-highlight-color:rgba(142,29,29,.14)}

@media(max-width:700px){
  .modal{overflow-x:hidden;overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior:contain;place-items:unset;align-items:flex-start;justify-content:center;padding:max(12px,env(safe-area-inset-top)) 10px max(18px,env(safe-area-inset-bottom))}
  .modal.open{display:flex}
  .modal-card,.intro-card,.retry-card,.learn-card{flex:0 0 auto;width:100%;max-height:none;min-height:0;margin:auto 0;padding:24px 16px;overflow:visible}
  .quiz-options button,.time-option,.calculus-answers button{min-height:46px}
}

@media(max-width:700px) and (max-height:500px){
  .modal{align-items:flex-start;padding-top:8px;padding-bottom:14px}
  .modal-card,.intro-card,.retry-card,.learn-card{margin:0;padding-top:20px;padding-bottom:20px}
  .modal-card h2{font-size:24px;margin-bottom:12px}
  .rules{margin:12px 0 14px}
  .challenge-setup{margin:10px 0 12px}
}

/* Frameless, upright event wordmark */
.seal-mark.event-logo{width:104px;height:60px;align-items:flex-start;justify-content:center;gap:6px;padding:0;border:0;box-shadow:none;text-align:left;transform:none}
.event-logo .event-year{font-size:19px;line-height:1;letter-spacing:.14em}
.event-logo .event-name{font-size:14px;line-height:1;letter-spacing:.08em}

@media(max-width:599px){
  .masthead{grid-template-columns:74px minmax(0,1fr)}
  .seal-mark.event-logo{width:70px;height:50px;gap:5px;padding:0}
  .event-logo .event-year{font-size:14px}
  .event-logo .event-name{font-size:10px}
}

@media(max-width:350px){
  .masthead{grid-template-columns:64px minmax(0,1fr)}
  .seal-mark.event-logo{width:60px;height:48px}
  .event-logo .event-year{font-size:13px}
  .event-logo .event-name{font-size:9px}
}

/* iOS Safari: explicit card geometry and prefixed 3D transforms */
.card{position:relative;display:block;width:100%;height:248px;min-width:0;-webkit-appearance:none;appearance:none;-webkit-perspective:900px;perspective:900px}
.card-inner{position:absolute;inset:0;display:block;width:auto;height:auto;-webkit-transform-style:preserve-3d;transform-style:preserve-3d;-webkit-transition:-webkit-transform .48s cubic-bezier(.2,.75,.25,1.15);transition:transform .48s cubic-bezier(.2,.75,.25,1.15)}
.card-face{-webkit-backface-visibility:hidden;backface-visibility:hidden}
.card-front{-webkit-transform:rotateY(180deg);transform:rotateY(180deg)}
.card.flipped .card-inner,.card.matched .card-inner{-webkit-transform:rotateY(180deg);transform:rotateY(180deg)}

@media(min-width:600px) and (max-width:900px){
  .card{height:clamp(230px,30vw,248px)}
}

@media(max-width:599px){
  .card{height:clamp(137px,42vw,165px);aspect-ratio:auto}
}

/* Tactile card motion: lift, spring, then settle like a card landing on a table */
.card{
  transform-origin:50% 86%;
  -webkit-tap-highlight-color:transparent;
  will-change:transform;
}
.card-inner{
  transform-origin:50% 50%;
  -webkit-transition:-webkit-transform .66s cubic-bezier(.2,1.38,.36,1);
  transition:transform .66s cubic-bezier(.2,1.38,.36,1);
  will-change:transform;
}
.card.flipped:not(.matched){
  animation:card-lift .68s cubic-bezier(.2,.72,.22,1) both;
}
.card.matched{
  animation:card-settle .72s cubic-bezier(.18,.75,.26,1) both;
}
.card.flipped .card-back,
.card.matched .card-back{
  box-shadow:0 2px 0 #4a1110,0 5px 9px rgba(20,4,3,.24);
}
.card.wrong{
  animation:card-reject .48s cubic-bezier(.36,.07,.19,.97) both;
}
.card:active:not(.matched){
  transform:translateY(2px) scale(.985);
}

@keyframes card-lift{
  0%{transform:translateY(0) rotateZ(0) scale(1)}
  42%{transform:translateY(-11px) rotateZ(-1.1deg) scale(1.025)}
  64%{transform:translateY(2px) rotateZ(.45deg) scale(.992)}
  80%{transform:translateY(-3px) rotateZ(-.2deg) scale(1.006)}
  100%{transform:translateY(0) rotateZ(0) scale(1)}
}
@keyframes card-settle{
  0%{transform:translateY(-5px) scale(1.018)}
  34%{transform:translateY(-13px) scale(1.045)}
  58%{transform:translateY(3px) scale(.986)}
  76%{transform:translateY(-3px) scale(1.008)}
  100%{transform:translateY(0) scale(1)}
}
@keyframes card-reject{
  0%,100%{transform:translateX(0) rotateZ(0)}
  18%{transform:translateX(-7px) rotateZ(-1.2deg)}
  36%{transform:translateX(6px) rotateZ(1deg)}
  54%{transform:translateX(-4px) rotateZ(-.7deg)}
  72%{transform:translateX(3px) rotateZ(.45deg)}
  88%{transform:translateX(-1px) rotateZ(-.15deg)}
}

@media(hover:hover){
  .card:not(.flipped):not(.matched):hover{transform:translateY(-4px) rotateZ(-.25deg)}
}

/* Success passphrase: revealed only after all six pairs are matched */
[hidden]{display:none!important}
.result-passphrase-button{
  display:block;
  width:min(100%,300px);
  margin:0 auto 14px;
  border:1px solid #b98a37;
  background:#5f1717;
  color:#fff4d7;
  padding:12px 20px;
  font-family:inherit;
  font-weight:700;
  letter-spacing:.14em;
  cursor:pointer;
  box-shadow:3px 3px 0 #d5a84d;
}
.result-passphrase{
  width:min(100%,360px);
  margin:0 auto 18px;
  padding:15px 18px 16px;
  border-top:1px solid #b98a37;
  border-bottom:1px solid #b98a37;
  background:rgba(255,249,229,.55);
  animation:passphrase-rise .35s ease-out both;
}
.result-passphrase span{
  display:block;
  color:var(--red);
  font-size:12px;
  font-weight:900;
  letter-spacing:.26em;
  padding-left:.26em;
}
.result-passphrase strong{
  display:block;
  margin:5px 0 7px;
  color:#4b2319;
  font-family:"BiauKai","DFKai-SB","KaiTi","STKaiti","Noto Serif TC",serif;
  font-size:clamp(30px,8vw,38px);
  font-style:normal;
  font-weight:700;
  font-synthesis:none;
  letter-spacing:.08em;
  padding-left:.08em;
}
.result-passphrase p{margin:0;color:#604839;font-size:14px;line-height:1.75}
.result-card.fail .result-passphrase-button,.result-card.fail .result-passphrase{display:none!important}
@keyframes passphrase-rise{from{opacity:0;transform:translateY(-7px)}to{opacity:1;transform:none}}

@media(max-width:480px){
  .result-passphrase-button{margin-bottom:12px;padding:11px 14px}
  .result-passphrase{padding:13px 12px 14px;margin-bottom:14px}
  .result-passphrase p{font-size:12px}
}