/* Additive visual and app upgrades. Existing v2 selectors remain intact. */
.logo{overflow:hidden;padding:0!important;background:transparent!important;box-shadow:0 11px 26px rgba(4,49,62,.2)!important}
.logo img{width:100%;height:100%;display:block}
.hero{isolation:isolate;min-height:430px;display:flex;align-items:center}
.hero:after{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;box-shadow:inset 0 0 0 1px rgba(255,255,255,.1)}
.hero-banner-art{position:absolute;right:-40px;bottom:-48px;width:min(48%,620px);height:auto;opacity:.72;z-index:-1;filter:drop-shadow(0 30px 45px rgba(1,27,35,.24));pointer-events:none}
.hero-grid{width:100%;position:relative;z-index:2}.hero-grid>div:first-child{max-width:920px}
.brand small{letter-spacing:.01em}.top{min-height:68px}.top-actions{align-items:center}
.install-pill{display:inline-flex;align-items:center;gap:7px;padding:9px 13px;border:1px solid color-mix(in srgb,var(--green) 40%,var(--line));background:color-mix(in srgb,var(--card) 92%,var(--green));border-radius:13px;color:var(--green);font-weight:900;cursor:pointer}
.online-pill{display:inline-flex;gap:6px;align-items:center;padding:7px 10px;border-radius:999px;background:var(--soft);font-size:11px;font-weight:900;color:var(--muted)}.online-pill:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--forest);box-shadow:0 0 0 4px color-mix(in srgb,var(--forest) 18%,transparent)}.online-pill.offline:before{background:var(--brass);box-shadow:0 0 0 4px color-mix(in srgb,var(--brass) 18%,transparent)}
.rag-shell{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(290px,.65fr);gap:16px}.rag-card{background:var(--card);border:1px solid var(--line);border-radius:26px;padding:20px;box-shadow:var(--shadow)}
.rag-title{display:flex;align-items:center;gap:12px}.rag-orb{width:48px;height:48px;border-radius:17px;display:grid;place-items:center;background:linear-gradient(145deg,var(--green),var(--navy));color:#fff;font-weight:950;box-shadow:0 14px 28px rgba(10,133,106,.23)}.rag-title h2{margin:0;font-size:22px}.rag-title p{margin:2px 0 0;font-size:12px;color:var(--muted)}
.rag-form{margin-top:15px}.rag-input-wrap{position:relative}.rag-input{width:100%;min-height:126px;resize:vertical;padding:16px 52px 16px 16px;border:1px solid var(--line);border-radius:18px;background:var(--soft);color:var(--ink);outline:0}.rag-input:focus{border-color:var(--green);box-shadow:0 0 0 4px color-mix(in srgb,var(--green) 13%,transparent)}.rag-mic{position:absolute;right:10px;top:10px;width:38px;height:38px;border:0;border-radius:12px;background:var(--card);color:var(--green);cursor:pointer}.rag-mic.listening{color:var(--signal);background:color-mix(in srgb,var(--signal) 14%,white);animation:pulse 1s infinite}
.rag-controls{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:10px}.rag-controls .scope-select{padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:var(--card);color:var(--ink)}.rag-submit{margin-left:auto;border:0;border-radius:13px;background:linear-gradient(135deg,var(--green),var(--navy));color:#fff;padding:11px 18px;font-weight:950;cursor:pointer;box-shadow:0 10px 24px rgba(7,89,108,.18)}
.rag-prompts{display:flex;gap:7px;flex-wrap:wrap;margin-top:11px}.rag-prompts button{border:1px solid var(--line);background:var(--card);color:var(--muted);border-radius:999px;padding:6px 9px;font-size:11px;cursor:pointer}
.rag-trust{display:grid;gap:10px}.trust-step{display:grid;grid-template-columns:34px 1fr;gap:10px;padding:12px;border-radius:15px;background:var(--soft)}.trust-step b{width:34px;height:34px;border-radius:11px;background:var(--card);display:grid;place-items:center;color:var(--green)}.trust-step strong{display:block;font-size:13px}.trust-step span{display:block;font-size:11px;color:var(--muted)}
.rag-status{margin-top:13px;display:flex;align-items:center;gap:8px;font-size:11px;color:var(--muted)}.rag-status-dot{width:8px;height:8px;border-radius:50%;background:var(--forest)}.rag-status-dot.local{background:var(--brass)}
.rag-output{margin-top:16px;display:none}.rag-output.visible{display:block}.rag-progress{display:none;padding:18px;background:var(--soft);border-radius:17px}.rag-progress.visible{display:flex;gap:12px;align-items:center}.spinner{width:23px;height:23px;border:3px solid var(--line);border-top-color:var(--green);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
.rag-understood{padding:14px 15px;border-radius:16px;background:linear-gradient(135deg,color-mix(in srgb,var(--green) 9%,var(--card)),var(--soft));border:1px solid color-mix(in srgb,var(--green) 28%,var(--line));font-size:13px}.rag-understood strong{display:block;margin-bottom:3px;color:var(--green)}
.rag-answer{margin-top:11px;padding:18px;border:1px solid var(--line);border-radius:18px;background:var(--card)}.rag-answer h3{margin:0 0 9px}.rag-answer p{margin:8px 0}.rag-answer ul{padding-left:19px}.rag-answer a{color:var(--green);font-weight:850}.rag-answer code{padding:2px 5px;border-radius:5px;background:var(--soft)}
.rag-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:10px 0}.rag-meta>div{padding:10px;border-radius:13px;background:var(--soft)}.rag-meta strong{display:block;font-size:12px}.rag-meta span{font-size:11px;color:var(--muted)}
.rag-sources{display:grid;gap:8px;margin-top:11px}.rag-source{display:grid;grid-template-columns:30px minmax(0,1fr) auto;gap:9px;align-items:center;padding:11px;border:1px solid var(--line);border-radius:14px;background:var(--card)}.rag-source .num{width:29px;height:29px;border-radius:10px;background:var(--soft);display:grid;place-items:center;font-size:11px;font-weight:950;color:var(--green)}.rag-source strong{display:block;font-size:12px}.rag-source small{display:block;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:520px}.rag-source a{text-decoration:none;color:var(--green);font-size:12px;font-weight:900}
.rag-actions{display:flex;gap:7px;justify-content:flex-end;margin-top:11px}.rag-actions button{border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:11px;padding:8px 10px;font-size:11px;font-weight:850;cursor:pointer}
.app-banner{margin-top:18px;display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:16px;align-items:center;padding:19px;border-radius:22px;background:linear-gradient(135deg,var(--navy),var(--green));color:#fff;overflow:hidden;position:relative}.app-banner:after{content:"";position:absolute;right:-70px;top:-90px;width:260px;height:260px;border-radius:50%;background:rgba(255,255,255,.08)}.app-banner h3{font-size:21px;margin:0 0 5px;font-family:var(--font-display)}.app-banner p{margin:0;color:rgba(255,255,255,.75);font-size:12px}.app-banner-actions{display:flex;gap:8px;justify-content:flex-end;z-index:1}.app-banner .btn{border-color:rgba(255,255,255,.28);background:rgba(255,255,255,.12);color:#fff}.app-banner .btn.primary{background:#fff;color:var(--navy);border-color:#fff}
.site-links{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin-top:7px}.site-links a{color:var(--green);font-weight:800;text-decoration:none}
.update-toast{position:fixed;right:18px;bottom:20px;z-index:90;width:min(370px,calc(100% - 36px));padding:14px;border-radius:16px;background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);display:none}.update-toast.visible{display:block}.update-toast strong{display:block}.update-toast p{font-size:12px;color:var(--muted);margin:3px 0 10px}
@media(max-width:1000px){.hero-banner-art{opacity:.28;width:66%}.rag-shell{grid-template-columns:1fr}.rag-trust{grid-template-columns:repeat(3,1fr)}.trust-step{grid-template-columns:1fr;text-align:center}.trust-step b{margin:auto}.app-banner{grid-template-columns:1fr}.app-banner-actions{justify-content:flex-start}}
@media(max-width:820px){.hero{min-height:500px}.hero-banner-art{right:-110px;bottom:-45px;width:92%;opacity:.24}.rag-card{padding:15px;border-radius:20px}.rag-trust{grid-template-columns:1fr}.trust-step{grid-template-columns:34px 1fr;text-align:left}.trust-step b{margin:0}.rag-meta{grid-template-columns:1fr}.rag-source{grid-template-columns:28px minmax(0,1fr)}.rag-source a{grid-column:2}.app-banner-actions{flex-wrap:wrap}.install-pill .install-text{display:none}}
@media(max-width:520px){.hero{min-height:520px}.rag-controls{align-items:stretch}.rag-controls .scope-select{width:100%}.rag-submit{margin-left:0;width:100%}.rag-input{min-height:150px}.online-pill{display:none}.top-actions{gap:4px}.install-pill{padding:9px 10px}}

/* v4 additive repair: persistent language mode, media/tools and floating PWA install. */
.language-switcher{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:11px;padding:7px 8px 7px 12px;border:1px solid rgba(255,255,255,.24);border-radius:15px;background:rgba(3,35,44,.18);max-width:420px}.language-switcher>span{font-size:12px;font-weight:850;color:rgba(255,255,255,.82)}.language-switcher>div{display:flex;gap:4px}.language-switcher button{border:1px solid rgba(255,255,255,.18);background:transparent;color:#fff;border-radius:10px;padding:7px 10px;font-size:12px;font-weight:900;cursor:pointer}.language-switcher button.active{background:#fff;color:var(--navy);box-shadow:0 6px 16px rgba(0,0,0,.16)}
.mode-stat{cursor:pointer;transition:.2s}.mode-stat:hover{background:rgba(255,255,255,.14)!important}.mode-stat strong{display:inline-flex;align-items:center;gap:5px}.mode-stat strong:after{content:'↔';font-size:12px;opacity:.75}
.media-category-grid,.tool-quick-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-bottom:13px}.media-category-card,.tool-quick-card{border:1px solid var(--line);background:var(--card);border-radius:17px;padding:14px;cursor:pointer;box-shadow:0 8px 20px rgba(8,59,76,.045);transition:.2s}.media-category-card:hover,.tool-quick-card:hover{transform:translateY(-2px);border-color:var(--green);box-shadow:var(--shadow)}.media-category-card b,.tool-quick-card b{display:block;font-size:14px}.media-category-card span,.tool-quick-card span{display:block;color:var(--muted);font-size:11px;margin-top:3px}.media-category-card i,.tool-quick-card i{font-style:normal;font-size:22px;display:block;margin-bottom:8px}
.floating-install{position:fixed;right:18px;bottom:22px;z-index:65;display:flex;align-items:center;gap:10px;border:1px solid color-mix(in srgb,var(--green) 42%,var(--line));border-radius:18px;padding:10px 14px 10px 10px;background:linear-gradient(135deg,var(--green),var(--navy));color:#fff;box-shadow:0 18px 40px rgba(5,75,77,.3);cursor:pointer;animation:installFloat 3.6s ease-in-out infinite}.floating-install-icon{width:38px;height:38px;border-radius:13px;display:grid;place-items:center;background:rgba(255,255,255,.16);font-size:21px;font-weight:950}.floating-install-copy{text-align:left}.floating-install-copy strong,.floating-install-copy small{display:block}.floating-install-copy strong{font-size:13px}.floating-install-copy small{font-size:10px;color:rgba(255,255,255,.75)}@keyframes installFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-4px)}}
.floating-install.installed{display:none}.bottom div{grid-template-columns:repeat(7,minmax(58px,1fr))!important;overflow-x:auto;scrollbar-width:none}.bottom div::-webkit-scrollbar{display:none}
@media(max-width:1080px){.media-category-grid,.tool-quick-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:820px){.floating-install{bottom:82px;right:12px}.media-category-grid,.tool-quick-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{min-height:auto!important}.hero-banner-art{display:none!important}.hero-grid{gap:15px}.hero-stat{grid-template-columns:repeat(3,minmax(0,1fr))!important;gap:7px!important}.hero-stat .stat{padding:10px 8px!important;min-width:0}.hero-stat .stat span{font-size:10px;line-height:1.2}.hero-stat .stat strong{font-size:16px;white-space:nowrap}.language-switcher{max-width:none}}
@media(max-width:520px){.top-actions #langBtn{display:none!important}.hero{min-height:auto!important;padding-bottom:18px}.hero-stat{grid-template-columns:repeat(3,minmax(0,1fr))!important}.hero-stat .stat{padding:9px 6px!important}.hero-stat .stat span{font-size:9px}.hero-stat .stat strong{font-size:14px}.floating-install{padding:9px;border-radius:16px}.floating-install-copy{display:none}.floating-install-icon{width:40px;height:40px}.media-category-grid,.tool-quick-grid{gap:8px}.media-category-card,.tool-quick-card{padding:12px}.language-switcher{padding-left:10px}.language-switcher button{padding:7px 9px}}
@media(display-mode:standalone){.floating-install,[data-install-app]{display:none!important}}