:root {
  --bg:        #060608;
  --bg-2:      #0b0c14;
  --bg-3:      #12131f;
  --border:    #1e2035;
  --border-hi: #2e3155;
  --text:      #e6eaf4;
  --text-dim:  #6b7094;
  --text-mute: #3a3d52;
  --accent:    #5bc8f5;
  --accent-dim:#1a4b63;
  --accent-glow: rgba(91,200,245,0.12);
  --red:       #f55b5b;
  --green:     #4df59a;
  --radius:    10px;
  --transition: 180ms cubic-bezier(.4,0,.2,1);
}
@media (prefers-color-scheme: light) {
  :root {
    --bg:#f0f2f8;--bg-2:#e4e7f0;--bg-3:#d8dcea;
    --border:#c5cade;--border-hi:#a8b0cc;
    --text:#0d0e18;--text-dim:#4a5070;--text-mute:#9098b8;
    --accent:#1a8abf;--accent-dim:#c5e8f7;--accent-glow:rgba(26,138,191,.10);
  }
}
:root[data-theme="dark"] {
  --bg:#060608;--bg-2:#0b0c14;--bg-3:#12131f;
  --border:#1e2035;--border-hi:#2e3155;
  --text:#e6eaf4;--text-dim:#6b7094;--text-mute:#3a3d52;
  --accent:#5bc8f5;--accent-dim:#1a4b63;--accent-glow:rgba(91,200,245,0.12);
}
:root[data-theme="light"] {
  --bg:#f0f2f8;--bg-2:#e4e7f0;--bg-3:#d8dcea;
  --border:#c5cade;--border-hi:#a8b0cc;
  --text:#0d0e18;--text-dim:#4a5070;--text-mute:#9098b8;
  --accent:#1a8abf;--accent-dim:#c5e8f7;--accent-glow:rgba(26,138,191,.10);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;}}
html{font-size:16px;}
body{
  background:var(--bg);color:var(--text);
  font-family:-apple-system,'Segoe UI',system-ui,sans-serif;
  min-height:100vh;display:flex;flex-direction:column;align-items:center;overflow-x:hidden;
}
body::before{
  content:'';position:fixed;inset:0;
  background-image:linear-gradient(var(--border) 1px,transparent 1px),linear-gradient(90deg,var(--border) 1px,transparent 1px);
  background-size:48px 48px;opacity:.35;pointer-events:none;z-index:0;
}
body::after{
  content:'';position:fixed;top:-200px;left:50%;transform:translateX(-50%);
  width:700px;height:500px;
  background:radial-gradient(ellipse at center,var(--accent-glow) 0%,transparent 70%);
  pointer-events:none;z-index:0;
}

.shell{
  position:relative;z-index:1;width:100%;max-width:860px;
  padding:0 24px 80px;display:flex;flex-direction:column;align-items:center;
}

header{width:100%;display:flex;align-items:center;justify-content:space-between;padding:28px 0 0;}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;}
.logo-mark img{
  height:120px;width:auto;
}
:root[data-theme="light"] .logo-mark img{filter:none;}
@media (prefers-color-scheme: light){.logo-mark img{filter:none;}}
.logo-name{font-size:1.1rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--text);}
.header-right{display:flex;align-items:center;gap:12px;}
.status-badge{
  display:flex;align-items:center;gap:6px;font-size:.72rem;font-weight:600;
  letter-spacing:.08em;text-transform:uppercase;color:var(--text-dim);
  background:var(--bg-2);border:1px solid var(--border);border-radius:99px;padding:5px 12px;
}
.status-dot{width:6px;height:6px;border-radius:50%;background:var(--green);box-shadow:0 0 6px var(--green);animation:pulse 2.4s ease-in-out infinite;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.4;}}
.theme-btn{
  background:var(--bg-2);border:1px solid var(--border);color:var(--text-dim);
  width:32px;height:32px;border-radius:8px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:border-color var(--transition),color var(--transition);font-size:.9rem;
}
.theme-btn:hover{border-color:var(--border-hi);color:var(--text);}

.hero{margin:72px 0 56px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:18px;}
.hero-eyebrow{font-size:.7rem;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:var(--accent);}
.hero-title{font-size:clamp(2.4rem,5.5vw,3.8rem);font-weight:800;letter-spacing:-.02em;line-height:1.08;text-wrap:balance;color:var(--text);}
.hero-title span{color:var(--accent);}
.hero-sub{font-size:.95rem;color:var(--text-dim);max-width:420px;line-height:1.65;text-wrap:balance;}

.products-label{font-size:.68rem;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:var(--text-mute);align-self:flex-start;margin-bottom:14px;}
.products{width:100%;display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:32px;}
@media(max-width:580px){.products{grid-template-columns:1fr;}}

.product-card{
  background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius);
  padding:22px 20px 20px;cursor:pointer;
  transition:border-color var(--transition),background var(--transition),box-shadow var(--transition),transform var(--transition);
  display:flex;flex-direction:column;gap:12px;position:relative;outline:none;user-select:none;
}
.product-card:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
.product-card:hover{border-color:var(--border-hi);background:var(--bg-3);transform:translateY(-2px);box-shadow:0 8px 32px rgba(0,0,0,.35);}
.product-card.selected{border-color:var(--accent);background:var(--bg-3);box-shadow:0 0 0 1px var(--accent),0 0 28px var(--accent-glow),0 8px 24px rgba(0,0,0,.3);}
.card-icon{width:38px;height:38px;border-radius:9px;background:var(--bg);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;transition:border-color var(--transition),background var(--transition);}
.product-card.selected .card-icon{border-color:var(--accent-dim);background:var(--accent-dim);}
.card-icon svg{width:18px;height:18px;}
.card-name{font-size:.95rem;font-weight:700;color:var(--text);letter-spacing:-.01em;}
.card-desc{font-size:.78rem;color:var(--text-dim);line-height:1.55;}
.card-tag{display:inline-flex;align-items:center;font-size:.65rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;padding:3px 8px;border-radius:4px;align-self:flex-start;margin-top:auto;}
.tag-temp{background:rgba(91,200,245,.1);color:var(--accent);}
.tag-perm{background:rgba(245,91,91,.1);color:var(--red);}
.tag-ext{background:rgba(77,245,154,.1);color:var(--green);}
.card-check{position:absolute;top:14px;right:14px;width:18px;height:18px;border-radius:50%;border:1.5px solid var(--border);display:flex;align-items:center;justify-content:center;transition:all var(--transition);}
.product-card.selected .card-check{background:var(--accent);border-color:var(--accent);}
.card-check svg{width:10px;height:10px;opacity:0;transition:opacity var(--transition);}
.product-card.selected .card-check svg{opacity:1;}

.divider{width:100%;height:1px;background:var(--border);margin:0 0 32px;}

.download-panel{
  width:100%;background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius);
  padding:28px;display:flex;align-items:center;justify-content:space-between;gap:24px;
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity var(--transition),transform var(--transition);flex-wrap:wrap;
}
.download-panel.visible{opacity:1;transform:translateY(0);pointer-events:all;}
.panel-info{display:flex;flex-direction:column;gap:4px;}
.panel-title{font-size:1rem;font-weight:700;color:var(--text);}
.panel-meta{font-size:.78rem;color:var(--text-dim);}
.panel-right{display:flex;align-items:center;gap:12px;flex-wrap:wrap;}
.version-chip{font-size:.7rem;font-weight:600;letter-spacing:.08em;color:var(--text-dim);background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:5px 10px;font-variant-numeric:tabular-nums;}
.download-btn{
  display:flex;align-items:center;gap:8px;background:var(--accent);color:#06090f;
  font-size:.82rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  border:none;border-radius:8px;padding:11px 22px;cursor:pointer;
  transition:opacity var(--transition),box-shadow var(--transition),transform var(--transition);
  white-space:nowrap;
}
.download-btn:hover{opacity:.88;box-shadow:0 0 20px rgba(91,200,245,.3);transform:translateY(-1px);}
.download-btn:active{transform:translateY(0);}
.download-btn:disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}
.download-btn svg{width:14px;height:14px;flex-shrink:0;}

/* Modal */
.modal-overlay{
  position:fixed;inset:0;z-index:200;
  background:rgba(6,6,8,.78);backdrop-filter:blur(7px);
  display:flex;align-items:center;justify-content:center;
  opacity:0;pointer-events:none;transition:opacity .2s ease;padding:24px;
}
.modal-overlay.open{opacity:1;pointer-events:all;}
.modal{
  background:var(--bg-2);border:1px solid var(--border-hi);border-radius:14px;
  padding:32px 28px 28px;width:100%;max-width:400px;
  display:flex;flex-direction:column;gap:22px;
  transform:translateY(16px) scale(.97);transition:transform .22s cubic-bezier(.4,0,.2,1);
  box-shadow:0 24px 80px rgba(0,0,0,.6);
}
.modal-overlay.open .modal{transform:translateY(0) scale(1);}
.modal-header{display:flex;flex-direction:column;gap:6px;}
.modal-title{font-size:1rem;font-weight:700;color:var(--text);}
.modal-sub{font-size:.8rem;color:var(--text-dim);line-height:1.5;}
.modal-product-chip{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--bg-3);border:1px solid var(--border);
  border-radius:7px;padding:8px 12px;font-size:.8rem;font-weight:600;color:var(--text);
}
.modal-product-chip .dot{width:7px;height:7px;border-radius:50%;flex-shrink:0;}
.key-field{display:flex;flex-direction:column;gap:8px;}
.key-label{font-size:.7rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--text-dim);}
.key-input{
  background:var(--bg);border:1px solid var(--border);border-radius:8px;
  color:var(--text);font-size:.88rem;font-family:monospace;
  padding:12px 14px;outline:none;width:100%;
  transition:border-color var(--transition),box-shadow var(--transition);letter-spacing:.04em;
}
.key-input::placeholder{color:var(--text-mute);}
.key-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow);}
.key-input.error-state{border-color:var(--red);box-shadow:0 0 0 3px rgba(245,91,91,.12);}
.modal-error{font-size:.78rem;color:var(--red);display:none;align-items:center;gap:6px;}
.modal-error.show{display:flex;}
.modal-error::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--red);flex-shrink:0;}
.modal-actions{display:flex;gap:10px;}
.btn-cancel{
  flex:1;background:var(--bg-3);border:1px solid var(--border);color:var(--text-dim);
  font-size:.82rem;font-weight:600;border-radius:8px;padding:11px;cursor:pointer;
  transition:border-color var(--transition),color var(--transition);
}
.btn-cancel:hover{border-color:var(--border-hi);color:var(--text);}
.btn-verify{
  flex:2;display:flex;align-items:center;justify-content:center;gap:8px;
  background:var(--accent);color:#06090f;font-size:.82rem;font-weight:700;
  letter-spacing:.06em;text-transform:uppercase;border:none;border-radius:8px;
  padding:11px;cursor:pointer;transition:opacity var(--transition),box-shadow var(--transition);
}
.btn-verify:hover{opacity:.88;box-shadow:0 0 16px rgba(91,200,245,.25);}
.btn-verify:disabled{opacity:.4;cursor:not-allowed;box-shadow:none;}
.verify-spinner{
  width:13px;height:13px;border:2px solid rgba(6,9,15,.3);border-top-color:#06090f;
  border-radius:50%;animation:spin .7s linear infinite;display:none;flex-shrink:0;
}
.btn-verify.loading .verify-icon{display:none;}
.btn-verify.loading .verify-spinner{display:block;}
@keyframes spin{to{transform:rotate(360deg);}}

/* Toast */
.toast-container{position:fixed;bottom:32px;right:32px;display:flex;flex-direction:column;gap:10px;z-index:300;pointer-events:none;}
.toast{
  background:var(--bg-3);border:1px solid var(--border);border-radius:var(--radius);
  padding:13px 18px;display:flex;align-items:center;gap:10px;font-size:.82rem;color:var(--text);
  box-shadow:0 8px 32px rgba(0,0,0,.4);animation:toastIn .22s cubic-bezier(.4,0,.2,1) forwards;
  max-width:320px;pointer-events:all;
}
.toast.error{border-color:var(--red);}
.toast.success{border-color:var(--green);}
.toast-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0;}
.error .toast-dot{background:var(--red);}
.success .toast-dot{background:var(--green);}
.toast.out{animation:toastOut .18s ease forwards;}
@keyframes toastIn{from{opacity:0;transform:translateY(10px);}to{opacity:1;transform:translateY(0);}}
@keyframes toastOut{from{opacity:1;transform:translateY(0);}to{opacity:0;transform:translateY(6px);}}

footer{margin-top:64px;font-size:.72rem;color:var(--text-mute);text-align:center;letter-spacing:.06em;}