/* ==========================================================================
   QVICOM MAIL + PRIVATE ALIASES — Extension Stylesheet
   Inherits all tokens and resets from qvicom.io/hosting (qvicom-base.css)
   ========================================================================== */

/* ==========================================================================
   Sub-Header Navigation System & Hamburger Drawer (v2.4.1)
   Consistent with qvicom.io/hosting header and navigation design language
   Bulletproof Z-Index Stacking Hierarchy:
     - Page content & cards: isolation: isolate (level 0)
     - Subnav bar: z-index: 950
     - Subnav item (open/hover): z-index: 960
     - Subnav dropdown menus: z-index: 1000
     - Top global header: z-index: 1000 (sticky top: 0)
     - Drawer & Backdrop: z-index: 2000 / 1999
     - Modals: z-index: 2500
     - Toasts: z-index: 3000
   ========================================================================== */

/* Ensure Global Top Header is top-most sticky bar */
.qv-header {
    position: sticky;
    top: 0;
    z-index: 1000;
}

/* Sub-Header Navigation Bar */
.qv-subnav {
    position: sticky;
    top: var(--qv-header-h, 60px);
    z-index: 950;
    background: color-mix(in srgb, var(--qv-bg) 88%, transparent);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--qv-border);
    transition: background var(--qv-normal) var(--qv-ease), border-color var(--qv-normal) var(--qv-ease);
}

.qv-subnav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 46px;
    gap: 0.5rem;
}

.qv-subnav .qv-nav {
    display: flex;
    align-items: center;
    gap: 0.15rem;
    min-width: 0;
    margin: 0;
    padding: 0;
    list-style: none;
}

.qv-subnav .qv-nav__item {
    position: relative;
    display: inline-flex;
    align-items: center;
}

.qv-subnav .qv-nav__item:hover,
.qv-subnav .qv-nav__item:focus-within,
.qv-subnav .qv-nav__item.is-open {
    z-index: 960;
}

.qv-subnav .qv-nav__link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.38rem 0.65rem;
    border-radius: var(--qv-radius-sm);
    color: var(--qv-text-muted);
    font-size: 0.86rem;
    font-weight: 600;
    white-space: nowrap;
    text-decoration: none;
    transition: all 0.15s ease;
}

.qv-subnav .qv-nav__link:hover {
    color: var(--qv-text);
    background: color-mix(in srgb, var(--qv-primary) 8%, transparent);
    text-decoration: none;
}

.qv-subnav .qv-nav__link[aria-current="page"],
.qv-subnav .qv-nav__item--active > .qv-nav__link {
    color: var(--qv-primary-strong, #3b82f6);
    background: color-mix(in srgb, var(--qv-primary) 12%, transparent);
    font-weight: 700;
}

html[data-theme="dark"] .qv-subnav .qv-nav__link[aria-current="page"],
html[data-theme="dark"] .qv-subnav .qv-nav__item--active > .qv-nav__link {
    color: var(--qv-primary-soft, #60a5fa);
    background: color-mix(in srgb, var(--qv-primary-soft) 16%, transparent);
}

.qv-subnav .qv-nav__caret {
    display: inline-block;
    width: 0;
    height: 0;
    margin-left: 0.25rem;
    vertical-align: middle;
    border-top: 4px solid currentColor;
    border-right: 3.5px solid transparent;
    border-left: 3.5px solid transparent;
    opacity: 0.65;
    transition: transform 0.2s ease;
}

.qv-subnav .qv-nav__item:hover .qv-nav__caret,
.qv-subnav .qv-nav__item.is-open .qv-nav__caret {
    transform: rotate(180deg);
}

/* Sub-Header Dropdown Menu */
.qv-subnav .qv-nav__menu {
    position: absolute;
    left: 0;
    top: calc(100% + 4px);
    width: min(290px, 80vw);
    background: var(--qv-surface-solid);
    border: 1px solid var(--qv-border);
    border-radius: var(--qv-radius);
    box-shadow: 0 16px 36px -6px rgba(0, 0, 0, 0.35), 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 0.4rem;
    display: grid;
    gap: 0.15rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    transition: opacity var(--qv-normal) var(--qv-ease), transform var(--qv-normal) var(--qv-ease), visibility var(--qv-normal);
    z-index: 1000;
}

/* Invisible bridge so mouse transitions smoothly over the gap */
.qv-subnav .qv-nav__menu::before {
    content: "";
    position: absolute;
    inset: -8px 0 auto 0;
    height: 8px;
    background: transparent;
}

.qv-subnav .qv-nav__item:nth-last-child(-n+2) .qv-nav__menu {
    left: auto;
    right: 0;
}

.qv-subnav .qv-nav__item:hover .qv-nav__menu,
.qv-subnav .qv-nav__item:focus-within .qv-nav__menu,
.qv-subnav .qv-nav__item.is-open .qv-nav__menu {
    opacity: 1;
    visibility: visible;
    transform: none;
}

.qv-subnav .qv-menu__link {
    display: block;
    padding: 0.45rem 0.65rem;
    border-radius: var(--qv-radius-sm);
    color: var(--qv-text);
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    transition: background 0.15s ease, color 0.15s ease;
}

.qv-subnav .qv-menu__link:hover,
.qv-subnav .qv-menu__link[aria-current="page"] {
    background: color-mix(in srgb, var(--qv-primary) 12%, transparent);
    color: var(--qv-primary-strong, #3b82f6);
    text-decoration: none;
}

html[data-theme="dark"] .qv-subnav .qv-menu__link:hover,
html[data-theme="dark"] .qv-subnav .qv-menu__link[aria-current="page"] {
    color: var(--qv-primary-soft, #60a5fa);
    background: color-mix(in srgb, var(--qv-primary-soft) 16%, transparent);
}

.qv-subnav .qv-menu__link small {
    display: block;
    color: var(--qv-text-muted);
    font-size: 0.74rem;
    font-weight: 450;
    margin-top: 0.12rem;
}

/* Right Quick Action in Subnav */
.qv-subnav__quick {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    margin-left: auto;
    flex-shrink: 0;
}

.qv-subnav__quick .qv-btn {
    font-size: 0.82rem;
    font-weight: 600;
    padding: 0.28rem 0.65rem;
}

/* Hamburger Button (.qv-nav-toggle) */
.qv-nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    cursor: pointer;
}

/* Off-Canvas Drawer Details & Groups */
.qv-drawer {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(88vw, 360px);
    z-index: 2000;
    background: var(--qv-surface-solid);
    border-left: 1px solid var(--qv-border);
    padding: 1.25rem 1.35rem;
    transform: translateX(100%);
    transition: transform var(--qv-normal) var(--qv-ease);
    overflow-y: auto;
    box-shadow: -8px 0 28px rgba(0, 0, 0, 0.3);
}

.qv-drawer[data-open="true"] {
    transform: translateX(0);
}

.qv-drawer__backdrop {
    position: fixed;
    inset: 0;
    background: rgba(10, 14, 24, 0.65);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    z-index: 1999;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--qv-normal);
}

.qv-drawer__backdrop[data-open="true"] {
    opacity: 1;
    pointer-events: auto;
}

.qv-drawer__group {
    border-bottom: 1px solid var(--qv-border);
    margin-bottom: 0.3rem;
    padding-bottom: 0.3rem;
}

.qv-drawer__group summary {
    cursor: pointer;
    padding: 0.65rem 0.2rem;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--qv-text);
    list-style: none;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.qv-drawer__group summary::-webkit-details-marker {
    display: none;
}

.qv-drawer__group summary::after {
    content: "▸";
    color: var(--qv-primary);
    font-size: 0.85rem;
    transition: transform 0.2s;
}

.qv-drawer__group[open] summary::after {
    content: "▾";
}

.qv-drawer__group a {
    display: block;
    padding: 0.42rem 0.4rem 0.42rem 1rem;
    color: var(--qv-text-muted);
    font-size: 0.88rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--qv-radius-sm);
    transition: color 0.15s, background 0.15s;
}

.qv-drawer__group a:hover {
    color: var(--qv-text);
    background: color-mix(in srgb, var(--qv-primary) 8%, transparent);
}

.qv-drawer__group a[aria-current="page"] {
    color: var(--qv-primary-strong, #3b82f6);
    background: color-mix(in srgb, var(--qv-primary) 12%, transparent);
    font-weight: 700;
}

html[data-theme="dark"] .qv-drawer__group a[aria-current="page"] {
    color: var(--qv-primary-soft, #60a5fa);
}

/* Responsive Handling */
@media (max-width: 980px) {
    .qv-subnav {
        display: none !important;
    }
    .qv-hamburger-label {
        display: none;
    }
}

/* Backwards-compatibility aliases for existing views */
.qv-mail-nav-wrapper { margin-bottom: 2rem; position: relative; z-index: 50; }
.qv-mail-nav { display: flex; align-items: stretch; width: 100%; list-style: none; padding: 0; margin: 0; }
.qv-mail-nav__item { flex: 1 1 0; position: relative; }
.qv-mail-nav__link { display: flex; align-items: center; justify-content: center; gap: 0.4rem; padding: 0.9rem 0.5rem; }
.qv-mail-nav__dropdown { position: absolute; top: 100%; left: 0; min-width: 230px; }
.qv-mail-subnav { display: flex; align-items: center; gap: 0.4rem; }
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.65rem;
    border-radius: var(--qv-radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--qv-text-muted);
    text-decoration: none;
    transition: all var(--qv-fast);
}

.qv-mail-subnav__link:hover {
    color: var(--qv-text);
    background: color-mix(in srgb, var(--qv-primary) 10%, transparent);
    text-decoration: none;
}

.qv-mail-subnav__link[aria-current="page"] {
    background: var(--qv-surface-solid);
    color: var(--qv-primary);
    font-weight: 600;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

/* Architecture visualizer */
.qv-arch-flow {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
    padding: 2rem 1rem;
    background: var(--qv-surface);
    border: 1px solid var(--qv-border);
    border-radius: var(--qv-radius-lg);
    position: relative;
}
.qv-arch-node {
    padding: 1rem 1.75rem;
    border-radius: var(--qv-radius);
    background: var(--qv-surface-solid);
    border: 1.5px solid var(--qv-border);
    box-shadow: var(--qv-shadow);
    text-align: center;
    min-width: 260px;
    position: relative;
    transition: all var(--qv-normal) var(--qv-ease);
}
.qv-arch-node--active {
    border-color: var(--qv-primary);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--qv-primary) 22%, transparent);
}
.qv-arch-node--future {
    border-style: dashed;
    opacity: 0.88;
}
.qv-arch-node strong {
    display: block;
    font-size: 1.05rem;
    font-family: var(--qv-font-display);
    color: var(--qv-text);
}
.qv-arch-node span {
    font-size: 0.8rem;
    color: var(--qv-text-muted);
}
.qv-arch-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    width: 100%;
    max-width: 720px;
}
.qv-arch-arrow {
    width: 2px;
    height: 24px;
    background: var(--qv-border);
    position: relative;
}
.qv-arch-arrow::after {
    content: "▼";
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 10px;
    color: var(--qv-primary);
}

/* Private Alias cards & chips */
.qv-alias-chip {
    font-family: var(--qv-font-mono);
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: -0.01em;
    color: var(--qv-primary-strong);
    background: color-mix(in srgb, var(--qv-primary) 12%, transparent);
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}
html[data-theme="dark"] .qv-alias-chip {
    color: var(--qv-primary-soft);
}

.qv-switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}
.qv-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}
.qv-slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: var(--qv-border);
    transition: var(--qv-fast);
    border-radius: 24px;
}
.qv-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--qv-fast);
    border-radius: 50%;
}
input:checked + .qv-slider {
    background-color: var(--qv-primary);
}
input:checked + .qv-slider:before {
    transform: translateX(20px);
}

/* Copy button */
.qv-copy-btn {
    cursor: pointer;
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
    border: 1px solid var(--qv-border);
    background: var(--qv-surface-solid);
    font-size: 0.78rem;
    color: var(--qv-text-muted);
    transition: all var(--qv-fast);
}
.qv-copy-btn:hover {
    color: var(--qv-primary);
    border-color: var(--qv-primary);
}

/* Platform Hero & Content Cards Stacking Isolation */
.qv-card,
.qv-card--glass,
.qv-panel {
    isolation: isolate;
}

/* Modal styles */
.qv-modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(18, 10, 22, 0.65);
    backdrop-filter: blur(8px);
    z-index: 2500;
    display: none;
    place-items: center;
    padding: 1rem;
}
.qv-modal-backdrop.is-open {
    display: grid;
}
.qv-modal {
    background: var(--qv-surface-solid);
    border: 1px solid var(--qv-border);
    border-radius: var(--qv-radius-lg);
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
    max-width: 540px;
    width: 100%;
    padding: 1.75rem;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: qv-slide-in 0.2s cubic-bezier(0.22, 1, 0.36, 1);
}
.qv-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}
.qv-modal__close {
    font-size: 1.5rem;
    line-height: 1;
    color: var(--qv-text-muted);
    cursor: pointer;
}
.qv-modal__close:hover {
    color: var(--qv-text);
}

/* DNS Record Table */
.qv-dns-badge {
    font-family: var(--qv-font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    background: color-mix(in srgb, var(--qv-primary) 12%, transparent);
    color: var(--qv-primary);
}
.qv-dns-code {
    font-family: var(--qv-font-mono);
    font-size: 0.82rem;
    word-break: break-all;
    background: var(--qv-bg);
    padding: 0.35rem 0.6rem;
    border-radius: 6px;
    border: 1px solid var(--qv-border);
    display: block;
}

@media (max-width: 680px) {
    .qv-arch-split {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }
}