/* ============================================================
   AetheriumOS — shared stylesheet
   Dark, technical, terminal-inflected. One accent (sky blue),
   monospace reserved for anything that is literally output.
   ============================================================ */
:root{--bg:#09090b;--surface:#0d0d11;--card:#131316;--border:#232328;--border-strong:#313138;--text-primary:#f4f4f5;--text-secondary:#a1a1aa;--text-tertiary:#71717a;--accent:#38bdf8;--accent-2:#818cf8;--accent-glow:rgba(56,189,248,.35);--accent-gradient:linear-gradient(135deg,#38bdf8 0%,#818cf8 100%);--success:#10b981;--success-bg:rgba(16,185,129,.12);--danger:#ef4444;--danger-bg:rgba(239,68,68,.12);--warning:#f59e0b;--radius-sm:8px;--radius-md:12px;--radius-lg:18px;--radius-full:999px;--shadow-lg:0 24px 60px -20px rgba(0,0,0,.65);--shadow-sm:0 4px 16px -8px rgba(0,0,0,.5);--font-sans:-apple-system,BlinkMacSystemFont,"Inter","Segoe UI",Roboto,sans-serif;--font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace}
*,*::before,*::after{box-sizing:border-box}html{color-scheme:dark;scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text-primary);font-family:var(--font-sans);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;color:#fff}p{margin:0;color:var(--text-secondary)}a{color:inherit;text-decoration:none}ul{list-style:none;margin:0;padding:0}code{font-family:var(--font-mono)}img,svg{display:block;max-width:100%}button{font-family:inherit}:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}}.bg-grid{position:fixed;inset:0;z-index:-1;background-image:linear-gradient(to right,rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(to bottom,rgba(255,255,255,.035) 1px,transparent 1px);background-size:48px 48px;-webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 30%,transparent 80%);mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 30%,transparent 80%)}.container{max-width:1160px;margin:0 auto;padding:0 24px}.main-content{padding-top:96px;padding-bottom:40px;min-height:70vh}.site-header{position:sticky;top:0;z-index:500;background:rgba(9,9,11,.82);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}.nav-container{max-width:1160px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.05rem;color:#fff;margin-right:auto;white-space:nowrap}.brand span{color:var(--accent)}.brand-icon{width:30px;height:30px;display:flex;align-items:center;justify-content:center;background:var(--card);border:1px solid var(--border-strong);border-radius:8px}.nav-menu{display:flex;align-items:center;gap:22px}.nav-link{font-size:.875rem;font-weight:500;color:var(--text-secondary);transition:color .15s ease}.nav-link:hover,.nav-link.active{color:#fff}.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto}.menu-toggle{display:none;background:var(--card);border:1px solid var(--border-strong);color:#fff;border-radius:var(--radius-sm);padding:8px;cursor:pointer}.mobile-nav{display:none;flex-direction:column;gap:4px;padding:12px 24px 20px;border-top:1px solid var(--border)}.mobile-nav.open{display:flex}.mobile-nav .nav-link{padding:10px 4px;border-bottom:1px solid var(--border)}.mobile-auth-block{margin-top:8px;display:flex;flex-direction:column;gap:8px}@media(max-width:860px){.nav-menu{display:none}.menu-toggle{display:flex}.nav-actions .btn:not(.menu-toggle){display:none}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:var(--radius-sm);font-size:.875rem;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .1s ease,border-color .15s ease,background .15s ease,box-shadow .15s ease;white-space:nowrap}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--accent-gradient);color:#04121b}.btn-primary:hover{box-shadow:0 0 24px var(--accent-glow)}.btn-accent{background:var(--accent);color:#04121b}.btn-accent:hover{box-shadow:0 0 24px var(--accent-glow)}.btn-outline{background:transparent;border-color:var(--border-strong);color:#fff}.btn-outline:hover{border-color:var(--accent);color:var(--accent)}.btn-ghost{background:transparent;color:var(--text-secondary)}.btn-ghost:hover{color:#fff;background:var(--surface)}.btn-sm{padding:7px 14px;font-size:.8rem}.btn-lg{padding:14px 26px;font-size:.95rem}.btn-full{width:100%}.btn:disabled{opacity:.5;cursor:not-allowed}.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:var(--radius-full);background:rgba(56,189,248,.08);border:1px solid rgba(56,189,248,.25);color:var(--accent);font-size:.78rem;font-weight:600}.badge-dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px var(--accent)}.badge-neutral{background:var(--surface);border-color:var(--border-strong);color:var(--text-secondary)}.badge-success{background:var(--success-bg);border-color:rgba(16,185,129,.3);color:var(--success)}.hero-section{text-align:center;padding:32px 0 20px}.hero-title{font-size:clamp(2.1rem,5vw,3.4rem);line-height:1.12;margin:20px 0 16px}.gradient-text{background:var(--accent-gradient);-webkit-background-clip:text;background-clip:text;color:transparent}.hero-subtitle{max-width:640px;margin:0 auto;font-size:1.05rem;line-height:1.6}.hero-cta{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:28px}.section-header{text-align:center;max-width:560px;margin:0 auto 32px}.section-header h2{font-size:1.9rem;margin-bottom:10px}.section-header p{font-size:.95rem}.bento-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:16px}.col-4{grid-column:span 4}.col-6{grid-column:span 6}.col-8{grid-column:span 8}@media(max-width:860px){.col-4,.col-6,.col-8{grid-column:span 12}}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;display:flex;flex-direction:column;justify-content:space-between;gap:20px;transition:border-color .15s ease}.card:hover{border-color:var(--border-strong)}.card h3{font-size:1.1rem;margin-bottom:8px}.card p{font-size:.875rem;line-height:1.55}.card-icon-wrapper{width:42px;height:42px;display:flex;align-items:center;justify-content:center;background:var(--surface);border:1px solid var(--border-strong);border-radius:var(--radius-sm);color:var(--accent);margin-bottom:14px}.card-footer{display:flex;align-items:center;justify-content:space-between;gap:10px;padding-top:16px;border-top:1px solid var(--border)}.form-group{margin-bottom:18px}.form-label{display:block;margin-bottom:7px;font-size:.8rem;font-weight:600;color:var(--text-secondary)}.form-input,.form-select{width:100%;padding:11px 14px;background:var(--surface);border:1px solid var(--border-strong);border-radius:var(--radius-sm);color:#fff;font-size:.9rem;font-family:inherit;transition:border-color .15s ease,box-shadow .15s ease}.form-input::placeholder{color:var(--text-tertiary)}.form-input:focus,.form-select:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow);outline:none}.form-select{appearance:none;cursor:pointer}.terminal-card{background:#0a0a0c;border:1px solid var(--border-strong);border-radius:var(--radius-md);overflow:hidden}.terminal-header{display:flex;align-items:center;gap:10px;padding:10px 14px;background:var(--surface);border-bottom:1px solid var(--border)}.terminal-dots{display:flex;gap:6px;margin-right:4px}.terminal-dot{width:10px;height:10px;border-radius:50%}.terminal-dot.red{background:#ef4444}.terminal-dot.yellow{background:#f59e0b}.terminal-dot.green{background:#10b981}.terminal-body{padding:16px;font-family:var(--font-mono);font-size:.82rem;line-height:1.7;color:var(--text-secondary);overflow-x:auto;overflow-y:auto}.terminal-body .comment{color:var(--text-tertiary)}.terminal-body .command{color:var(--accent)}.terminal-body .output{color:var(--text-secondary)}.terminal-body .success{color:var(--success);font-weight:600}.terminal-body .error-line{color:var(--danger)}.progress-bar-bg{width:100%;height:8px;background:#0d0d11;border:1px solid var(--border);border-radius:var(--radius-full);overflow:hidden}.progress-bar-fill{height:100%;background:var(--accent-gradient);width:0%;transition:width .2s ease}.metric-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;position:relative}.core-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:12px;margin-top:16px}.core-item{background:#0d0d11;border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px 10px;text-align:center;display:flex;flex-direction:column;justify-content:space-between}.core-bar-track{width:100%;height:4px;background:#18181b;border-radius:2px;overflow:hidden;margin:8px 0 4px}.core-bar-fill{height:100%;background:var(--accent-gradient);width:0%;transition:width .3s ease}.os-tabs{display:flex;justify-content:center;gap:10px;margin-bottom:32px;flex-wrap:wrap}.os-tab-btn{background:var(--surface);border:1px solid var(--border);color:var(--text-secondary);padding:10px 20px;border-radius:var(--radius-sm);font-size:.9rem;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:8px;transition:all .15s ease}.os-tab-btn:hover{border-color:var(--border-strong);color:#fff}.os-tab-btn.active{background:var(--card);border-color:var(--accent);color:#fff;box-shadow:0 0 16px var(--accent-glow)}.os-panel{display:none;animation:fadeIn .25s ease}.os-panel.active{display:block}@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.stepper-nav{display:flex;justify-content:space-between;margin-bottom:28px;overflow-x:auto;gap:6px}.step-item{display:flex;align-items:center;gap:6px;flex:1;min-width:0;opacity:.45}.step-item.active,.step-item.done{opacity:1}.step-number{width:24px;height:24px;flex-shrink:0;border-radius:50%;background:var(--surface);border:1px solid var(--border-strong);display:flex;align-items:center;justify-content:center;font-size:.72rem;font-weight:700;color:var(--text-secondary)}.step-item.active .step-number{background:var(--accent);border-color:var(--accent);color:#04121b}.step-item.done .step-number{background:var(--success);border-color:var(--success);color:#04120b}.step-title{font-size:.7rem;color:var(--text-secondary);white-space:nowrap;display:none}@media(min-width:640px){.step-title{display:inline}}.flasher-box{background:var(--card);border:1px solid var(--border-strong);border-radius:var(--radius-lg);padding:36px 32px;max-width:680px;width:100%;margin:0 auto;box-shadow:var(--shadow-lg)}.step-pane{display:none;animation:fadeIn .25s ease}.step-pane.active{display:block}.flash-overlay{position:fixed;inset:0;background:rgba(9,9,11,.92);backdrop-filter:blur(12px);z-index:99999;display:none;align-items:center;justify-content:center;padding:24px}.flash-overlay.open{display:flex}.flash-modal{background:var(--card);border:1px solid var(--border-strong);border-radius:var(--radius-lg);padding:32px;max-width:480px;width:100%;text-align:center;box-shadow:var(--shadow-lg)}.spinner{width:44px;height:44px;border:4px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite;margin:0 auto 16px}@keyframes spin{to{transform:rotate(360deg)}}.modal-overlay{position:fixed;inset:0;background:rgba(9,9,11,.85);backdrop-filter:blur(8px);z-index:9999;display:none;align-items:center;justify-content:center;padding:20px}.modal-overlay.open{display:flex}.modal-content{position:relative;background:var(--card);border:1px solid var(--border-strong);border-radius:var(--radius-lg);padding:32px;max-width:460px;width:100%;box-shadow:var(--shadow-lg)}.modal-close{position:absolute;top:16px;right:16px;background:var(--surface);border:1px solid var(--border-strong);color:var(--text-secondary);width:30px;height:30px;border-radius:50%;cursor:pointer;font-size:1.1rem;line-height:1}.modal-close:hover{color:#fff}.storage-table{width:100%;border-collapse:collapse;text-align:left}.storage-table th{padding:12px 16px;font-size:.75rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-tertiary);border-bottom:1px solid var(--border-strong);background:var(--surface)}.storage-table td{padding:14px 16px;font-size:.85rem;color:var(--text-secondary);border-bottom:1px solid var(--border)}.storage-table tr:last-child td{border-bottom:none}.dropzone{border:2px dashed var(--border-strong);border-radius:var(--radius-md);padding:32px 20px;text-align:center;background:#0d0d11;cursor:pointer;transition:all .2s ease}.dropzone:hover,.dropzone.dragover{border-color:var(--accent);background:rgba(56,189,248,.03)}.filter-bar{display:flex;gap:8px;overflow-x:auto;padding-bottom:8px;margin-bottom:24px}.filter-chip{background:var(--surface);border:1px solid var(--border);color:var(--text-secondary);padding:6px 14px;border-radius:var(--radius-full);font-size:.8rem;font-weight:500;cursor:pointer;white-space:nowrap;transition:all .15s ease}.filter-chip:hover{color:#fff;border-color:var(--border-strong)}.filter-chip.active{background:var(--card);border-color:var(--accent);color:#fff;box-shadow:0 0 12px var(--accent-glow)}.search-wrapper{position:relative;margin-bottom:16px}.search-icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--text-tertiary);pointer-events:none}.search-input-field{padding-left:42px!important}.device-card{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-md);padding:16px 20px;margin-bottom:10px}.device-card:hover{border-color:var(--border-strong)}.device-empty{text-align:center;padding:48px 20px;color:var(--text-tertiary);font-size:.9rem}.site-footer{border-top:1px solid var(--border);padding:48px 0 28px;margin-top:60px}.footer-grid{display:grid;grid-template-columns:2fr repeat(3,1fr);gap:32px;margin-bottom:32px}@media(max-width:720px){.footer-grid{grid-template-columns:1fr 1fr}}.footer-brand p{font-size:.85rem;margin-top:12px;line-height:1.6;max-width:260px}.footer-heading{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:#fff;margin-bottom:14px}.footer-links{display:flex;flex-direction:column;gap:10px}.footer-links a{font-size:.85rem;color:var(--text-secondary);transition:color .15s ease}.footer-links a:hover{color:var(--accent)}.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;padding-top:24px;border-top:1px solid var(--border);font-size:.8rem;color:var(--text-tertiary)}#toast-stack{position:fixed;bottom:20px;right:20px;z-index:999999;display:flex;flex-direction:column;gap:10px;max-width:min(360px,calc(100vw - 40px))}.toast{display:flex;align-items:flex-start;gap:10px;background:var(--card);border:1px solid var(--border-strong);border-left:3px solid var(--accent);border-radius:var(--radius-sm);padding:12px 14px;font-size:.85rem;color:#fff;box-shadow:var(--shadow-sm);animation:toastIn .2s ease}.toast.success{border-left-color:var(--success)}.toast.error{border-left-color:var(--danger)}.toast.info{border-left-color:var(--accent)}.toast.leaving{animation:toastOut .18s ease forwards}@keyframes toastIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes toastOut{to{opacity:0;transform:translateY(8px)}}