:root{--bg:#f7fbf7;--surface:#fff;--ink:#19352e;--muted:#5c706b;--primary:#237a57;--primary-dark:#14563b;--accent:#e4b73f;--soft:#e5f3ea;--border:#cfe1d6;--shadow:0 18px 55px #14563b1f}[data-theme=garbage]{--bg:#f3f1e8;--surface:#fffdf8;--ink:#2d4035;--muted:#65736a;--primary:#52705b;--primary-dark:#395441;--accent:#c6a24a;--soft:#e4eadf;--border:#d3dcd0;--shadow:0 18px 55px #374e3f1f;background:var(--bg);min-height:100vh}[data-theme=trains]{--bg:#eef2f3;--surface:#fbfcfc;--ink:#273b46;--muted:#667780;--primary:#526f7c;--primary-dark:#3a535f;--accent:#b27c55;--soft:#dde6e8;--border:#cbd8dc;--shadow:0 18px 55px #3046501f;background:var(--bg);min-height:100vh}*{box-sizing:border-box}html{background:var(--bg)}body{color:var(--ink);background:var(--bg);margin:0;font-family:Arial,Helvetica,sans-serif;line-height:1.5}button,input,select{font:inherit}a{color:inherit;text-decoration:none}h1,h2,p{margin-top:0}h1{letter-spacing:-.045em;font-size:clamp(2.1rem,5vw,4.6rem);line-height:1.04}h2{line-height:1.2}.sr-only{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.site-header{border-bottom:1px solid var(--border);z-index:50;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#ffffffe6;justify-content:space-between;align-items:center;min-height:78px;padding:14px clamp(20px,6vw,84px);display:flex;position:sticky;top:0}[data-theme=garbage] .site-header{background:#fffdf8ed}[data-theme=trains] .site-header{background:#fbfcfced}.brand{letter-spacing:-.02em;align-items:center;gap:11px;font-size:1.83rem;font-weight:800;line-height:1;display:inline-flex}.brand-logo{object-fit:contain;width:57px;height:40px}.brand-name-auti{color:#cc9f44}.brand-name-grow{color:#295b3e}.site-header nav{align-items:center;gap:clamp(10px,2vw,25px);font-weight:700;display:flex}.site-header nav>a:not(.button):hover,.link-button:hover{color:var(--primary)}.link-button{color:var(--ink);cursor:pointer;background:0 0;border:0;padding:6px;font-weight:700}.language-picker select{border:1px solid var(--border);color:var(--ink);background:#fff;border-radius:9px;padding:8px;font-weight:700}.button{color:#fff;background:var(--primary);box-shadow:0 8px 20px color-mix(in srgb, var(--primary) 25%, transparent);cursor:pointer;border:0;border-radius:14px;justify-content:center;align-items:center;padding:14px 23px;font-weight:800;transition:transform .15s,background 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p{max-width:610px;color:var(--muted);font-size:1.24rem}.eyebrow{color:var(--primary);text-transform:uppercase;letter-spacing:.13em;margin-bottom:18px;font-size:.78rem;font-weight:900;display:inline-block}.actions{gap:13px;margin-top:30px;display:flex}.hero-art{background:var(--soft);height:470px;box-shadow:inset 0 0 0 2px white, var(--shadow);border-radius:48% 52% 40% 60%/55% 40% 60% 45%;position:relative;overflow:hidden}.garbage-hero-art{background:linear-gradient(155deg,#eef1e8 0%,#e1e9dc 58%,#d9e2d5 100%)}.garbage-hero-halo{background:#c6a24a38;border-radius:50%;width:210px;height:210px;position:absolute;top:28px;right:28px}.garbage-hero-ground{background:#52705b1f;border-radius:50%;width:112%;height:140px;position:absolute;bottom:28px;left:-6%;transform:rotate(-2deg)}.garbage-hero-image{z-index:2;filter:drop-shadow(0 15px 14px #2d403529);width:112%;height:auto;position:absolute;bottom:72px;left:-6%}.train-hero-art{background:linear-gradient(155deg,#eef2f2 0%,#dfe8ea 58%,#d7e2e5 100%)}.train-hero-halo{background:#b27c552e;border-radius:50%;width:210px;height:210px;position:absolute;top:28px;right:28px}.train-hero-ground{background:#526f7c1c;border-radius:50%;width:112%;height:140px;position:absolute;bottom:28px;left:-6%;transform:rotate(-2deg)}.train-hero-image{z-index:2;filter:drop-shadow(0 15px 14px #273b4626);width:112%;height:auto;position:absolute;bottom:72px;left:-6%}.feature-grid,.activity-grid{grid-template-columns:repeat(3,1fr);gap:22px;padding:0 clamp(24px,8vw,120px) 90px;display:grid}.feature-grid article{background:var(--surface);border:1px solid var(--border);border-radius:22px;padding:30px;box-shadow:0 10px 35px #1432280d}.feature-grid article>span{font-size:2.4rem}.interest-icon-image{object-fit:contain;width:1em;height:1em;display:block}.feature-theme-icon{width:1em;height:1em;display:block}.feature-grid h2{margin:16px 0 9px;font-size:1.18rem}.feature-grid p{color:var(--muted);margin-bottom:0}.form-page{background-image:radial-gradient(circle at 15% 25%, var(--soft) 0 110px, transparent 112px), radial-gradient(circle at 90% 80%, var(--soft) 0 170px, transparent 172px);place-items:center;min-height:calc(100vh - 78px);padding:50px 20px;display:grid}.auth-card{background:var(--surface);border:1px solid var(--border);width:min(100%,540px);box-shadow:var(--shadow);border-radius:26px;padding:clamp(28px,6vw,50px)}.auth-card h1{font-size:2.4rem}.auth-card>label{margin:18px 0;font-weight:800;display:block}.auth-card input[type=email],.auth-card input[type=password]{border:2px solid var(--border);width:100%;color:var(--ink);background:#fff;border-radius:11px;outline:none;margin-top:7px;padding:13px 14px}.auth-card input:focus{border-color:var(--primary);box-shadow:0 0 0 4px var(--soft)}.auth-card small{color:var(--muted);margin-top:6px;font-weight:400;display:block}.auth-card fieldset{border:0;margin:23px 0;padding:0}.auth-card legend{margin-bottom:10px;font-weight:800}.theme-options{grid-template-columns:1fr 1fr;gap:12px;display:grid}.theme-option{border:2px solid var(--border);cursor:pointer;background:#fff;border-radius:15px;flex-direction:column;align-items:center;gap:7px;padding:16px;display:flex}.theme-option.selected{border-color:var(--primary);background:var(--soft)}.theme-option input{opacity:0;position:absolute}.theme-icon{font-size:2.4rem}.error{color:#a52018;background:#ffebe9;border-radius:9px;padding:10px 12px}.center-link{color:var(--primary);text-align:center;margin-top:18px;font-weight:800;display:block}.centered{place-items:center;min-height:60vh;display:grid}.page-shell{max-width:1240px;min-height:calc(100vh - 78px);margin:0 auto;padding:65px 30px 90px}.page-heading{max-width:800px;margin-bottom:42px}.theme-page-heading{justify-content:space-between;align-items:center;gap:30px;max-width:none;display:flex}.theme-page-heading>div{max-width:800px}.theme-heading-image{object-fit:contain;width:min(36vw,340px);height:auto;max-height:158px}[data-theme=garbage] .theme-page-heading{border:1px solid var(--border);background:linear-gradient(120deg,#fffdf8f5,#e4eadfc7);border-radius:24px;padding:23px 28px;box-shadow:0 12px 35px #374e3f12}[data-theme=trains] .theme-page-heading{border:1px solid var(--border);background:linear-gradient(120deg,#fbfcfcf5,#dde6e8cc);border-radius:24px;padding:23px 28px;box-shadow:0 12px 35px #30465012}.page-heading h1,.matching-page h1,.game-page h1{font-size:clamp(2.2rem,5vw,4rem)}.activity-grid{padding:0}.activity-card{border:1px solid var(--border);background:var(--surface);border-radius:25px;flex-direction:column;min-height:390px;padding:28px;transition:transform .2s,box-shadow .2s;display:flex;position:relative;overflow:hidden;box-shadow:0 12px 35px #1432280f}.activity-card:hover{box-shadow:var(--shadow);transform:translateY(-7px)}.activity-card.featured{color:#fff;background:var(--primary)}[data-theme=garbage] .activity-card{background:linear-gradient(145deg, var(--surface), #faf8f0)}[data-theme=garbage] .activity-card.featured{background:linear-gradient(145deg,#587760,#3f5c49)}[data-theme=trains] .activity-card{background:linear-gradient(145deg, var(--surface), #f2f6f7)}[data-theme=trains] .activity-card.featured{background:linear-gradient(145deg,#5b7884,#405c68)}.activity-card .number{opacity:.09;font-size:3.7rem;font-weight:900;position:absolute;top:15px;right:20px}.activity-icon{background:var(--soft);border-radius:19px;place-items:center;width:70px;height:70px;margin-bottom:28px;font-size:2.5rem;display:grid}.featured .activity-icon{background:#ffffff2e}.activity-card h2{font-size:1.45rem}.activity-card p{color:var(--muted)}.featured p{color:#fffc}.card-action{color:var(--primary);margin-top:auto;font-weight:900}.featured .card-action{color:#fff}.progress-row{align-items:center;gap:14px;margin-bottom:36px;font-weight:800;display:flex}.progress{background:var(--soft);border-radius:10px;flex:1;height:10px;overflow:hidden}.progress i{background:var(--primary);border-radius:inherit;height:100%;transition:width .3s;display:block}.matching-page h1{max-width:880px;margin-bottom:30px}.audio-button{border:2px solid var(--primary);color:var(--primary);cursor:pointer;background:#fff;border-radius:14px;align-items:center;gap:14px;margin-bottom:30px;padding:14px 22px;font-weight:900;display:inline-flex}.audio-button span{color:#fff;background:var(--primary);border-radius:50%;place-items:center;width:34px;height:34px;display:grid}.activity-instructions{max-width:820px;color:var(--muted);font-size:1.08rem}.phrase-card{border-left:5px solid var(--accent);background:var(--surface);border-radius:14px;flex-direction:column;gap:4px;width:min(100%,540px);margin:25px 0 16px;padding:18px 22px;display:flex;box-shadow:0 7px 25px #14322812}.phrase-card span{color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-size:.8rem;font-weight:900}.phrase-card strong{font-size:1.45rem}.audio-pairing-workspace{grid-template-columns:repeat(2,minmax(0,455px));justify-content:space-between;column-gap:clamp(80px,10vw,150px);margin-top:30px;display:grid;position:relative}.connection-canvas{z-index:5;pointer-events:none;width:100%;height:100%;position:absolute;inset:0;overflow:visible}.connection-line path{fill:none;stroke-linecap:round}.connection-line-outline{stroke:#fff;stroke-width:8px;opacity:.94}.connection-line-colour{stroke-width:4px}.connection-line circle{stroke:#fff;stroke-width:2px}.connection-line.connection-0 .connection-line-colour,.connection-line.connection-0 circle{stroke:#3278b8;fill:#3278b8}.connection-line.connection-1 .connection-line-colour,.connection-line.connection-1 circle{stroke:#d65d49;fill:#d65d49}.connection-line.connection-2 .connection-line-colour,.connection-line.connection-2 circle{stroke:#7a62b3;fill:#7a62b3}.connection-line.connection-3 .connection-line-colour,.connection-line.connection-3 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.pairing-card-title{text-align:center;font-size:1.2rem}.pairing-choice:not(.selected):has(.pairing-card-hit-area:not(:disabled)):hover{border-color:color-mix(in srgb, var(--primary) 45%, transparent);transform:translateY(-2px)}.pairing-choice.selected{border-color:var(--primary);box-shadow:0 0 0 4px color-mix(in srgb, var(--primary) 14%, transparent)}.pairing-choice.available{cursor:pointer;border-style:dashed}.pairing-choice.connected.connection-0{border-left-color:#3278b8}.pairing-choice.connected.connection-1{border-left-color:#d65d49}.pairing-choice.connected.connection-2{border-left-color:#7a62b3}.pairing-choice.connected.connection-3{border-left-color:#218368}.pairing-card-hit-area{z-index:1;border-radius:inherit;cursor:pointer;background:0 0;border:0;width:100%;position:absolute;inset:0}.pairing-card-hit-area:disabled{cursor:default}.pairing-card-title{pointer-events:none;font-size:1.05rem;position:relative}.audio-icon-button{z-index:2;color:#fff;background:var(--primary);width:46px;height:46px;box-shadow:0 5px 14px color-mix(in srgb, var(--primary) 26%, transparent);cursor:pointer;border:0;border-radius:50%;place-items:center;font-size:1rem;display:grid;position:relative}.audio-icon-button:hover{background:var(--primary-dark);transform:scale(1.04)}.pairing-choice.correct{background:#e8f8ef;border-color:#23905b}.pairing-choice.wrong{background:#fff0ee;border-color:#c33d32}.pairing-actions{background:var(--surface);border:1px solid var(--border);border-radius:15px;justify-content:space-between;align-items:center;gap:20px;margin-top:25px;padding:18px 20px;display:flex}.pairing-actions .button:disabled{cursor:default;opacity:.55;transform:none}.feedback-actions{gap:10px;display:flex}.centered-message{text-align:center;flex-direction:column;justify-content:center;align-items:center;display:flex}.centered-message h1{max-width:780px;font-size:clamp(2rem,5vw,3.5rem)}.centered-message p{color:var(--muted)}.matching-grid{grid-template-columns:repeat(3,1fr);gap:5px;display:grid}.image-choice{min-width:0;color:var(--ink);cursor:pointer;background:#fff;border:3px solid #0000;border-radius:16px;padding:9px;transition:transform .15s,border .15s,opacity .15s;overflow:hidden;box-shadow:0 6px 20px #14322817}.image-choice:hover:not(:disabled){border-color:var(--primary);transform:translateY(-5px)}.image-choice 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var(--border);box-shadow:var(--shadow);border-radius:22px;align-items:center;gap:25px;padding:28px;display:flex}.profile-card h2{margin-bottom:7px}.profile-card p{color:var(--muted);margin:3px 0}.avatar{background:var(--soft);border-radius:25px;flex:0 0 95px;place-items:center;width:95px;height:95px;font-size:3.4rem;display:grid}.profile-theme-card{background:var(--surface);border:1px solid var(--border);border-radius:22px;margin-top:22px;padding:28px}.profile-theme-card h2{margin-bottom:6px}.profile-theme-card>div:first-child p{color:var(--muted);margin-bottom:20px}.profile-theme-options{grid-template-columns:repeat(2,minmax(0,240px));gap:14px;display:grid}.profile-theme-option{border:2px solid var(--border);color:var(--ink);cursor:pointer;text-align:left;background:#fff;border-radius:15px;align-items:center;gap:12px;padding:15px 18px;display:flex}.profile-theme-option span{font-size:2rem}.profile-theme-option.selected{border-color:var(--primary);background:var(--soft);box-shadow:0 0 0 3px color-mix(in srgb, var(--primary) 12%, transparent)}.save-confirmation{color:var(--primary);margin:16px 0 0;font-weight:800}.history{margin-top:48px}.history h2{font-size:1.8rem}.table-wrap{border:1px solid var(--border);background:#fff;border-radius:16px;overflow-x:auto}table{border-collapse:collapse;width:100%}th,td{text-align:left;border-bottom:1px solid var(--border);padding:16px 18px}th{background:var(--soft);text-transform:uppercase;letter-spacing:.07em;font-size:.82rem}tbody tr:last-child td{border-bottom:0}.empty-state{border:2px dashed var(--border);text-align:center;color:var(--muted);border-radius:15px;padding:35px}.game-page>p{color:var(--muted);font-size:1.1rem}.game-frame{aspect-ratio:800/610;border:1px solid var(--border);width:100%;max-height:75vh;box-shadow:var(--shadow);background:#fff;border-radius:20px;overflow:hidden}.game-frame canvas{display:block}.game-complete{background:var(--soft);border-radius:14px;justify-content:space-between;align-items:center;gap:20px;margin-top:18px;padding:15px 20px;display:flex}@media (max-width:900px){.hero{grid-template-columns:1fr;padding-top:45px}.hero-art{height:380px}.theme-page-heading{align-items:flex-start}.theme-heading-image{width:260px}.feature-grid,.activity-grid{grid-template-columns:1fr}.activity-card{min-height:300px}.matching-grid{grid-template-columns:repeat(2,1fr)}.audio-pairing-workspace{grid-template-columns:1fr;row-gap:80px}.site-header nav>a:not(.button),.link-button{display:none}}@media (max-width:540px){.site-header{padding:12px 15px}.brand-name{display:none}.site-header nav{gap:8px}.hero{padding:40px 20px}.hero-art{height:300px}.garbage-hero-image{width:118%;bottom:56px;left:-9%}.garbage-hero-halo{width:140px;height:140px}.garbage-hero-ground{height:92px;bottom:22px}.train-hero-image{width:118%;bottom:56px;left:-9%}.train-hero-halo{width:140px;height:140px}.train-hero-ground{height:92px;bottom:22px}.theme-page-heading{padding:22px}.theme-heading-image{display:none}.feature-grid{padding:0 20px 50px}.theme-options{grid-template-columns:1fr}.matching-grid{grid-template-columns:1fr 1fr}.pairing-actions,.feedback-actions,.feedback,.profile-card,.game-complete{flex-direction:column;align-items:stretch}.profile-card{text-align:center}.avatar{margin:auto}.profile-theme-options{grid-template-columns:1fr}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}