:root {
    --bg: #0b1020;
    --bg-soft: #121a2f;
    --panel: rgba(18, 26, 47, 0.94);
    --panel-solid: #151e36;
    --border: rgba(148, 163, 184, 0.16);
    --text: #e8eefc;
    --muted: #94a3b8;
    --primary: #3b82f6;
    --primary-2: #6366f1;
    --accent: #22d3ee;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --radius: 14px;
    --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
    --sidebar-w: 260px;
    --sidebar-w-collapsed: 76px;
    --topbar-h: 56px;
    --font: "Be Vietnam Pro", "Segoe UI", system-ui, sans-serif;
    --touch: 44px;
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --safe-left: env(safe-area-inset-left, 0px);
    --safe-right: env(safe-area-inset-right, 0px);
    --ease: 160ms ease;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }
body {
    font-family: var(--font);
    background:
        radial-gradient(1200px 600px at 10% -10%, rgba(59, 130, 246, 0.18), transparent 55%),
        radial-gradient(900px 500px at 100% 0%, rgba(99, 102, 241, 0.16), transparent 50%),
        var(--bg);
    color: var(--text);
    min-height: 100vh;
    min-height: 100dvh;
    line-height: 1.55;
    overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button, a, input, select, textarea { -webkit-tap-highlight-color: transparent; }
img, svg { max-width: 100%; height: auto; }
code, pre {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
code {
    background: rgba(15, 23, 42, 0.65);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.1em 0.4em;
    font-size: 0.9em;
}
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    border: 0;
}

/* —— Topbar (mobile) —— */
.topbar {
    display: none;
    position: sticky;
    top: 0;
    z-index: 50;
    height: calc(var(--topbar-h) + var(--safe-top));
    padding: var(--safe-top) 12px 0;
    padding-left: max(12px, var(--safe-left));
    padding-right: max(12px, var(--safe-right));
    align-items: center;
    gap: 10px;
    background: rgba(11, 16, 32, 0.92);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.topbar-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 0;
}
.topbar-brand strong {
    font-size: 0.98rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.brand-mark.sm {
    width: 32px;
    height: 32px;
    border-radius: 9px;
    font-size: 0.75rem;
}
.nav-toggle,
.nav-close,
.topbar-user {
    appearance: none;
    border: 1px solid var(--border);
    background: rgba(255,255,255,0.04);
    color: var(--text);
    width: var(--touch);
    height: var(--touch);
    min-width: var(--touch);
    min-height: var(--touch);
    border-radius: 12px;
    display: inline-grid;
    place-items: center;
    cursor: pointer;
    text-decoration: none !important;
    transition: background var(--ease), border-color var(--ease);
}
.nav-toggle:hover,
.nav-close:hover,
.topbar-user:hover {
    background: rgba(59, 130, 246, 0.15);
    border-color: rgba(59, 130, 246, 0.35);
}
.nav-close {
    margin-left: auto;
    display: none;
}

.sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 55;
    background: rgba(2, 6, 23, 0.62);
    border: 0;
    padding: 0;
    cursor: pointer;
}
.sidebar-backdrop[hidden] { display: none !important; }

/* —— Sidebar —— */
.sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--sidebar-w);
    background: linear-gradient(180deg, #10182d, #0d1426);
    border-right: 1px solid var(--border);
    padding: 22px 16px;
    padding-bottom: max(22px, var(--safe-bottom));
    display: flex;
    flex-direction: column;
    z-index: 60;
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: contain;
    transition: width 0.22s ease;
}
.sidebar-nav { flex: 1; min-width: 0; }

.sidebar-collapse {
    appearance: none;
    display: none;
    align-items: center;
    gap: 10px;
    width: 100%;
    min-height: 40px;
    margin: 0 0 10px;
    padding: 8px 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: rgba(255,255,255,0.03);
    color: var(--muted);
    font: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--ease), border-color var(--ease), color var(--ease);
}
.sidebar-collapse:hover {
    background: rgba(59, 130, 246, 0.12);
    border-color: rgba(59, 130, 246, 0.28);
    color: var(--text);
}
.sidebar-collapse i {
    width: 18px;
    text-align: center;
    transition: transform 0.22s ease;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 10px 20px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 12px;
}
.brand-mark {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-2));
    color: #fff;
    font-weight: 700;
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.35);
    flex-shrink: 0;
}
.brand-text { min-width: 0; }
.brand-text strong {
    display: block;
    font-size: 1.05rem;
    letter-spacing: 0.2px;
}
.brand-text span {
    display: block;
    color: var(--muted);
    font-size: 0.78rem;
}

.nav-label {
    color: var(--muted);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin: 14px 10px 8px;
    font-weight: 600;
}

.sidebar a.nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: var(--touch);
    padding: 10px 12px;
    margin: 3px 0;
    border-radius: 10px;
    color: var(--text);
    text-decoration: none;
    transition: background var(--ease), border-color var(--ease);
    border: 1px solid transparent;
    position: relative;
    white-space: nowrap;
}
.sidebar a.nav-link:hover {
    background: rgba(59, 130, 246, 0.12);
    border-color: rgba(59, 130, 246, 0.2);
    text-decoration: none;
}
.sidebar a.nav-link.active {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.28), rgba(99, 102, 241, 0.22));
    border-color: rgba(99, 102, 241, 0.35);
    font-weight: 600;
}
.sidebar a.nav-link:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}
.sidebar a.nav-link i {
    width: 18px;
    text-align: center;
    color: var(--accent);
    flex-shrink: 0;
}
.nav-text {
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}
.sidebar-footer .user-chip {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 10px;
    border-radius: 10px;
    background: rgba(255,255,255,0.03);
    color: var(--muted);
    font-size: 0.9rem;
}
.user-name {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.btn-logout {
    color: #fecaca !important;
    border: 1px solid rgba(239, 68, 68, 0.35);
    background: rgba(239, 68, 68, 0.08);
    border-radius: 8px;
    padding: 8px 12px;
    min-height: 36px;
    font-size: 0.8rem;
    text-decoration: none !important;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* Desktop: rail icon-only when collapsed */
@media (min-width: 901px) {
    .sidebar-collapse { display: inline-flex; }

    html.sidebar-collapsed-boot,
    body.sidebar-collapsed {
        --sidebar-w: var(--sidebar-w-collapsed);
    }

    html.sidebar-collapsed-boot .sidebar,
    body.sidebar-collapsed .sidebar {
        width: var(--sidebar-w-collapsed);
        padding-left: 10px;
        padding-right: 10px;
        align-items: stretch;
    }
    html.sidebar-collapsed-boot .brand,
    body.sidebar-collapsed .brand {
        justify-content: center;
        padding: 8px 0 16px;
        gap: 0;
    }
    html.sidebar-collapsed-boot .brand-text,
    html.sidebar-collapsed-boot .nav-label,
    html.sidebar-collapsed-boot .nav-text,
    html.sidebar-collapsed-boot .collapse-label,
    html.sidebar-collapsed-boot .user-text,
    html.sidebar-collapsed-boot .logout-text,
    body.sidebar-collapsed .brand-text,
    body.sidebar-collapsed .nav-label,
    body.sidebar-collapsed .nav-text,
    body.sidebar-collapsed .collapse-label,
    body.sidebar-collapsed .user-text,
    body.sidebar-collapsed .logout-text {
        position: absolute;
        width: 1px;
        height: 1px;
        padding: 0;
        margin: -1px;
        overflow: hidden;
        clip: rect(0, 0, 0, 0);
        border: 0;
        white-space: nowrap;
    }
    html.sidebar-collapsed-boot .sidebar-collapse,
    body.sidebar-collapsed .sidebar-collapse {
        justify-content: center;
        padding: 10px;
    }
    html.sidebar-collapsed-boot .sidebar-collapse i,
    body.sidebar-collapsed .sidebar-collapse i {
        transform: rotate(180deg);
    }
    html.sidebar-collapsed-boot .sidebar a.nav-link,
    body.sidebar-collapsed .sidebar a.nav-link {
        justify-content: center;
        padding: 12px 0;
        gap: 0;
    }
    html.sidebar-collapsed-boot .sidebar a.nav-link i,
    body.sidebar-collapsed .sidebar a.nav-link i {
        width: 22px;
        font-size: 1.05rem;
    }
    html.sidebar-collapsed-boot .sidebar-footer .user-chip,
    body.sidebar-collapsed .sidebar-footer .user-chip {
        flex-direction: column;
        padding: 8px 4px;
        gap: 8px;
    }
    html.sidebar-collapsed-boot .user-name,
    body.sidebar-collapsed .user-name {
        justify-content: center;
    }
    html.sidebar-collapsed-boot .btn-logout,
    body.sidebar-collapsed .btn-logout {
        width: 100%;
        justify-content: center;
        padding: 10px 8px;
    }

    body.sidebar-collapsed .sidebar a.nav-link::after {
        content: attr(data-tooltip);
        position: absolute;
        left: calc(100% + 12px);
        top: 50%;
        transform: translateY(-50%) translateX(-4px);
        background: #0f172a;
        color: var(--text);
        border: 1px solid var(--border);
        border-radius: 8px;
        padding: 6px 10px;
        font-size: 0.8rem;
        font-weight: 500;
        white-space: nowrap;
        opacity: 0;
        pointer-events: none;
        box-shadow: var(--shadow);
        transition: opacity 0.15s ease, transform 0.15s ease;
        z-index: 70;
    }
    body.sidebar-collapsed .sidebar a.nav-link:hover::after,
    body.sidebar-collapsed .sidebar a.nav-link:focus-visible::after {
        opacity: 1;
        transform: translateY(-50%) translateX(0);
    }
}

/* —— Main —— */
.main {
    margin-left: var(--sidebar-w);
    min-height: 100vh;
    min-height: 100dvh;
    padding: 28px 28px calc(48px + var(--safe-bottom));
    padding-left: max(28px, var(--safe-left));
    padding-right: max(28px, var(--safe-right));
    max-width: 1200px;
    transition: margin-left 0.22s ease;
}

.page-header {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px 16px;
    margin-bottom: 22px;
}
.page-header h1 {
    margin: 0 0 6px;
    font-size: clamp(1.35rem, 2.5vw, 1.7rem);
    letter-spacing: -0.02em;
    line-height: 1.25;
}
.page-header p {
    margin: 0;
    color: var(--muted);
    max-width: 640px;
    font-size: 0.95rem;
}

.card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: clamp(16px, 3vw, 22px);
    margin-bottom: 18px;
    backdrop-filter: blur(10px);
}
.card h2, .card h3 {
    margin: 0 0 10px;
    font-size: 1.1rem;
}

.help-box {
    background: linear-gradient(135deg, rgba(34, 211, 238, 0.08), rgba(59, 130, 246, 0.08));
    border: 1px solid rgba(34, 211, 238, 0.22);
    border-radius: var(--radius);
    padding: 16px 18px;
    margin-bottom: 18px;
    color: #dbeafe;
}
.help-box strong { color: var(--accent); }
.help-box ol, .help-box ul { margin: 8px 0 0; padding-left: 1.2rem; color: var(--muted); }
.help-box li { margin: 4px 0; }

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}
.stat {
    padding: 16px;
    border-radius: 12px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border);
}
.stat .label { color: var(--muted); font-size: 0.85rem; }
.stat .value {
    font-size: 1.35rem;
    font-weight: 700;
    margin-top: 4px;
    word-break: break-word;
}

label {
    display: block;
    margin: 12px 0 6px;
    color: #cbd5e1;
    font-size: 0.92rem;
    font-weight: 500;
}
input[type="text"],
input[type="password"],
input[type="search"],
input[type="date"],
input[type="number"],
textarea,
select {
    width: 100%;
    min-height: var(--touch);
    padding: 12px 14px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: #0c1324;
    color: var(--text);
    font: inherit;
    outline: none;
    transition: border-color var(--ease), box-shadow var(--ease);
}
input:focus, textarea:focus, select:focus {
    border-color: rgba(59, 130, 246, 0.7);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.18);
}
input:disabled, textarea:disabled, select:disabled, button:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}
.hint {
    display: block;
    margin-top: 5px;
    color: var(--muted);
    font-size: 0.8rem;
}
.field-error {
    color: #fca5a5;
    font-size: 0.8rem;
    display: none;
    margin-top: 4px;
}
input.invalid { border-color: rgba(239, 68, 68, 0.7); }

.form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

.btn {
    appearance: none;
    border: none;
    border-radius: 10px;
    padding: 11px 16px;
    min-height: var(--touch);
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: filter var(--ease), transform var(--ease), background var(--ease);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none !important;
    color: inherit;
    touch-action: manipulation;
}
.btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none !important;
}
.btn:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-2));
    color: #fff;
    box-shadow: 0 10px 24px rgba(59, 130, 246, 0.28);
}
.btn-primary:hover:not(:disabled) { filter: brightness(1.08); transform: translateY(-1px); }
.btn-secondary {
    background: rgba(148, 163, 184, 0.12);
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-secondary:hover:not(:disabled) { background: rgba(148, 163, 184, 0.18); }
.btn-danger {
    background: rgba(239, 68, 68, 0.15);
    color: #fecaca;
    border: 1px solid rgba(239, 68, 68, 0.35);
}
.btn-success {
    background: rgba(34, 197, 94, 0.16);
    color: #bbf7d0;
    border: 1px solid rgba(34, 197, 94, 0.35);
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    margin-bottom: 16px;
}
.toolbar input {
    max-width: 360px;
    flex: 1 1 220px;
}

.license-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
    gap: 14px;
}
.license-card {
    background: var(--panel-solid);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    transition: border-color var(--ease), transform var(--ease);
}
.license-card:hover {
    border-color: rgba(59, 130, 246, 0.4);
    transform: translateY(-2px);
}
.license-card h3 {
    margin: 0 0 10px;
    font-size: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 8px;
    flex-wrap: wrap;
}
.license-card p {
    margin: 6px 0;
    font-size: 0.9rem;
    color: #cbd5e1;
}
.license-card .key-chip {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    background: #0c1324;
    border: 1px dashed rgba(34, 211, 238, 0.35);
    padding: 10px 8px;
    border-radius: 8px;
    cursor: pointer;
    word-break: break-all;
    min-height: 40px;
}
.license-card .form-actions .btn {
    flex: 1 1 calc(50% - 10px);
    min-width: 120px;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}
.badge-ok { background: rgba(34,197,94,.15); color: #86efac; }
.badge-warn { background: rgba(245,158,11,.15); color: #fcd34d; }
.badge-bad { background: rgba(239,68,68,.15); color: #fca5a5; }

.toast {
    position: fixed;
    right: max(18px, var(--safe-right));
    bottom: max(18px, var(--safe-bottom));
    left: auto;
    z-index: 100;
    min-width: min(260px, calc(100vw - 36px));
    max-width: min(420px, calc(100vw - 36px));
    padding: 12px 14px;
    border-radius: 12px;
    background: #111827;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    display: none;
    word-break: break-word;
}
.toast.show { display: block; animation: fadeIn .2s ease; }
.toast.error { border-color: rgba(239,68,68,.45); }
.toast.success { border-color: rgba(34,197,94,.45); }

.dialog-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(2, 6, 23, 0.72);
    display: none;
    place-items: center;
    z-index: 80;
    padding: max(16px, var(--safe-top)) max(16px, var(--safe-right)) max(16px, var(--safe-bottom)) max(16px, var(--safe-left));
}
.dialog-backdrop.show { display: grid; }
.dialog {
    width: min(440px, 100%);
    background: var(--panel-solid);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 20px;
    box-shadow: var(--shadow);
}
.dialog h2 { margin: 0 0 8px; }
.dialog p { color: var(--muted); margin: 0 0 16px; }
.dialog .form-actions { margin-top: 0; }
.dialog .form-actions .btn { flex: 1; }

.key-result { display: none; }
.key-result.show { display: block; }
.key-row {
    display: flex;
    gap: 8px;
    align-items: stretch;
    flex-wrap: wrap;
}
.key-row input {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    flex: 1 1 180px;
}
.key-row .btn { flex: 0 0 auto; }

.steps { display: grid; gap: 10px; }
.step {
    display: grid;
    grid-template-columns: 36px 1fr;
    gap: 12px;
    align-items: start;
    padding: 12px;
    border-radius: 12px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border);
}
.step-num {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-2));
    font-weight: 700;
    flex-shrink: 0;
}
.step h3 { margin: 0 0 4px; font-size: 0.98rem; }
.step p { margin: 0; color: var(--muted); font-size: 0.9rem; }

#loading-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    z-index: 200;
    transition: width 0.4s ease;
    pointer-events: none;
}

/* —— Login —— */
.login-page {
    min-height: 100vh;
    min-height: 100dvh;
    display: grid;
    place-items: center;
    padding: max(24px, var(--safe-top)) max(24px, var(--safe-right)) max(24px, var(--safe-bottom)) max(24px, var(--safe-left));
}
.login-card {
    width: min(420px, 100%);
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: clamp(22px, 5vw, 28px);
}
.login-card h1 {
    margin: 0 0 6px;
    text-align: center;
    font-size: clamp(1.5rem, 5vw, 1.8rem);
}
.login-card .subtitle {
    text-align: center;
    color: var(--muted);
    margin: 0 0 22px;
    font-size: 0.92rem;
}
.login-error {
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.35);
    color: #fecaca;
    border-radius: 10px;
    padding: 10px 12px;
    margin-bottom: 12px;
    font-size: 0.9rem;
}
.login-card .btn {
    width: 100%;
    justify-content: center;
    margin-top: 16px;
}
.login-foot {
    margin-top: 18px;
    text-align: center;
    color: var(--muted);
    font-size: 0.82rem;
}

body.nav-open { overflow: hidden; }

/* —— Responsive —— */
@media (max-width: 1024px) {
    .main { padding: 22px 20px calc(40px + var(--safe-bottom)); }
    .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
    .topbar { display: flex; }

    .sidebar {
        transform: translateX(-105%);
        transition: transform 0.22s ease;
        width: min(var(--sidebar-w), 86vw);
        box-shadow: none;
        padding-top: max(16px, var(--safe-top));
    }
    body.nav-open .sidebar {
        transform: translateX(0);
        box-shadow: 24px 0 48px rgba(0, 0, 0, 0.45);
    }
    .sidebar-backdrop {
        display: block;
    }
    body.nav-open .sidebar-backdrop {
        display: block;
    }
    .nav-close { display: inline-grid; }

    .main {
        margin-left: 0;
        padding: 16px max(16px, var(--safe-right)) calc(28px + var(--safe-bottom)) max(16px, var(--safe-left));
        max-width: none;
    }

    .grid-2,
    .grid-3 { grid-template-columns: 1fr; }

    .page-header .btn {
        width: 100%;
    }

    .toolbar input {
        max-width: none;
        width: 100%;
    }

    .license-card:hover { transform: none; }

    .toast {
        left: max(12px, var(--safe-left));
        right: max(12px, var(--safe-right));
        bottom: max(12px, var(--safe-bottom));
        max-width: none;
        min-width: 0;
    }
}

@media (max-width: 480px) {
    .license-card .form-actions .btn {
        flex: 1 1 100%;
    }
    .key-row .btn {
        width: 100%;
    }
    .form-actions .btn {
        flex: 1 1 100%;
    }
    .step {
        grid-template-columns: 32px 1fr;
        gap: 10px;
    }
}

@media (min-width: 901px) {
    .topbar { display: none !important; }
    .sidebar-backdrop { display: none !important; }
    .nav-close { display: none !important; }
    body.nav-open { overflow: auto; }
}

@media (max-width: 900px) {
    body.sidebar-collapsed {
        --sidebar-w: 260px;
    }
    body.sidebar-collapsed .sidebar {
        width: min(260px, 86vw);
        padding-left: 16px;
        padding-right: 16px;
    }
    .sidebar-collapse { display: none !important; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    .sidebar { transition: none; }
    .btn-primary:hover:not(:disabled),
    .license-card:hover { transform: none; }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: none; }
}