:root{--font-body: "Outfit", sans-serif;--color-bg: #ffffff;--color-surface: #f3f4f6;--color-border: #e5e7eb;--color-text: #111827;--color-text-muted: #6b7280;--color-dark: #111827;--color-accent: #ff3c00;--color-accent-hover: #e63600;--color-accent-text: #ffffff;--color-accent-subtle: rgba(255, 60, 0, .06);--color-success: #059669;--color-success-bg: #d1fae5;--color-error: #dc2626;--color-error-bg: #fee2e2;--color-warning-bg: #fef3c7;--color-warning-text: #92400e;--radius-btn: 6px;--radius-card: 8px;--max-width: 680px;--spacing: 1.5rem}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-text-size-adjust:100%}body{font-family:var(--font-body);font-size:1rem;line-height:1.7;color:var(--color-text);background:var(--color-bg);min-height:100vh;display:flex;flex-direction:column}h1,h2,h3,h4{font-family:var(--font-body);font-weight:700;line-height:1.15;letter-spacing:-.02em}a{color:var(--color-accent);text-decoration:underline}a:hover{color:var(--color-accent-hover)}.site-header{position:relative;background:var(--color-dark);overflow:hidden;padding:0 var(--spacing)}.site-header__inner{max-width:calc(var(--max-width) + 4rem);margin:0 auto;padding:1.25rem 2rem;display:flex;align-items:center;gap:1.25rem;position:relative;z-index:1}.site-header__logo-wrap{display:flex;align-items:center;flex-shrink:0}.site-header__logo{height:38px;width:auto;display:block}.site-header__sep{width:1px;height:32px;background:#ffffff1f;flex-shrink:0}.site-header__name{font-size:1.125rem;font-weight:800;color:#fff;letter-spacing:-.03em;line-height:1.1}.site-header__tagline{font-size:.75rem;color:#ffffff6b;font-weight:500;margin-top:.2rem}.site-header:before{content:"";position:absolute;right:-90px;top:-90px;width:300px;height:300px;border-radius:50%;background:#ffffff08;pointer-events:none}.site-header:after{content:"";position:absolute;right:140px;bottom:-32px;width:88px;height:88px;background:#ff3c002e;transform:rotate(45deg);pointer-events:none}.site-footer{background:var(--color-dark);padding:1.25rem var(--spacing)}.site-footer__inner{max-width:var(--max-width);margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:var(--spacing)}.site-footer__link{font-size:.8rem;font-weight:600;text-decoration:none;color:#ffffff61;transition:color .15s;letter-spacing:.01em}.site-footer__link:hover{color:var(--color-accent)}.main-content{flex:1;width:100%;max-width:var(--max-width);margin:0 auto;padding:2.5rem var(--spacing) 3rem}.card{background:var(--color-surface);border-radius:var(--radius-card);padding:1.5rem}.card+.card{margin-top:1.25rem}.card--success{background:var(--color-success-bg)}.card--error{background:var(--color-error-bg)}.card--warning{background:var(--color-warning-bg)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;font-family:var(--font-body);font-size:.9rem;font-weight:600;line-height:1.6;padding:12px 24px;border-radius:var(--radius-btn);border:none;cursor:pointer;text-decoration:none;transition:background .2s,transform .2s;white-space:nowrap}.btn:focus-visible{outline:3px solid var(--color-accent);outline-offset:2px}.btn:disabled{opacity:.45;cursor:not-allowed}.btn:hover:not(:disabled){transform:scale(1.05)}.btn-primary{background:var(--color-accent);color:var(--color-accent-text)}.btn-primary:hover:not(:disabled){background:var(--color-accent-hover)}.btn-secondary{background:var(--color-surface);color:var(--color-text)}.btn-secondary:hover:not(:disabled){background:var(--color-border)}.btn-sm{font-size:.8rem;padding:6px 14px}.btn-lg{padding:18px 40px;font-size:1rem}.page-heading{font-size:2.5rem;font-weight:700;letter-spacing:-.04em;line-height:1.05;margin-bottom:.5rem}.section-heading{font-size:1.875rem;font-weight:800;letter-spacing:-.03em;margin-bottom:.5rem}.section-subheading{font-size:1.05rem;font-weight:700;letter-spacing:-.01em;margin-bottom:.5rem;color:var(--color-text)}.helper-text{font-size:.875rem;color:var(--color-text-muted);margin-top:.25rem}.steps{list-style:none;counter-reset:steps;display:flex;flex-direction:column;gap:.6rem}.steps li{display:flex;gap:.75rem;align-items:flex-start;font-size:.925rem;counter-increment:steps}.steps li:before{content:counter(steps);flex-shrink:0;width:1.5rem;height:1.5rem;border-radius:50%;background:var(--color-accent);color:#fff;font-size:.75rem;font-weight:700;font-family:var(--font-body);display:flex;align-items:center;justify-content:center;margin-top:.1rem}.firmware-list{display:flex;flex-direction:column;margin-top:.75rem;max-height:380px;overflow-y:auto;border-radius:var(--radius-card);background:var(--color-bg)}.firmware-item{display:flex;align-items:center;padding:.875rem 1rem;cursor:pointer;border-bottom:1px solid var(--color-border);transition:background .15s;gap:.75rem}.firmware-item:last-child{border-bottom:none}.firmware-item:hover{background:var(--color-surface)}.firmware-item.selected{background:var(--color-accent-subtle);border-left:4px solid var(--color-accent)}.firmware-item__name{flex:1;font-weight:600;font-size:.925rem}.firmware-item__filename{font-size:.775rem;color:var(--color-text-muted);font-family:monospace}.progress-bar-wrap{background:var(--color-border);border-radius:0;height:14px;overflow:hidden;margin:1.25rem 0 .5rem}.progress-bar-fill{height:100%;background:var(--color-accent);border-radius:0;transition:width .2s ease}.progress-label{font-size:.875rem;font-weight:700;color:var(--color-text);text-align:right;letter-spacing:-.01em}.device-badge{display:inline-flex;align-items:center;gap:.4rem;background:var(--color-success-bg);border-radius:var(--radius-card);padding:.3rem .875rem;font-size:.8rem;font-weight:700;color:var(--color-success);letter-spacing:.01em}.device-badge:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--color-success);flex-shrink:0}details.troubleshoot{background:var(--color-surface);border-radius:var(--radius-card);border-left:4px solid var(--color-accent);margin-top:2rem;overflow:hidden}details.troubleshoot summary{padding:1rem 1.25rem;font-weight:700;font-size:.75rem;letter-spacing:.08em;text-transform:uppercase;cursor:pointer;list-style:none;display:flex;align-items:center;gap:.5rem;user-select:none;color:var(--color-text-muted)}details.troubleshoot summary:hover{color:var(--color-text)}details.troubleshoot summary:before{content:"▶";font-size:.6rem;transition:transform .15s;color:var(--color-accent)}details.troubleshoot[open] summary:before{transform:rotate(90deg)}details.troubleshoot .troubleshoot-body{padding:0 1.25rem 1.25rem}.release-strip{display:flex;align-items:center;gap:.5rem;font-size:.75rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--color-text-muted);margin-bottom:.75rem}.release-strip a{font-size:.75rem;font-weight:600}.spinner{display:inline-block;width:1.25rem;height:1.25rem;border:3px solid var(--color-border);border-top-color:var(--color-accent);border-radius:50%;animation:spin .7s linear infinite;flex-shrink:0}@keyframes spin{to{transform:rotate(360deg)}}.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.text-muted{color:var(--color-text-muted)}.text-error{color:var(--color-error)}.text-success{color:var(--color-success)}.text-sm{font-size:.875rem}.fw-600{font-weight:600}