/* ========================================
   MODERN LAYOUT — Icon Rail + Nav Panel
   Kartiq DMS — 2026
   ======================================== */

/* ── Layout Shell ────────────────────── */
.modern-shell {
    display: flex;
    height: 100vh;
    height: 100dvh;
    max-width: 100%;
    overflow: hidden;
}

/* ── Icon Rail (56px) ────────────────── */
.modern-rail {
    width: 56px;
    min-width: 56px;
    background: var(--o365-gray-20);
    border-right: 1px solid var(--o365-gray-30);
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.rail-top {
    padding: 12px 0;
    display: flex;
    justify-content: center;
}

.rail-logo {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.rail-logo img {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    object-fit: contain;
    transition: transform 0.15s;
}

.rail-logo:hover img {
    transform: scale(1.08);
}

.rail-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 4px 0;
    overflow-y: auto;
    overflow-x: hidden;
}

.rail-main::-webkit-scrollbar { width: 0; }

.rail-bottom {
    padding: 8px 0 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    position: relative;
}

/* Rail icon buttons */
.rail-icon-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    border-radius: 10px;
    color: var(--o365-gray-130);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: all 0.12s ease;
    text-decoration: none;
    margin: 2px auto;
    position: relative;
}

.rail-icon-btn:hover {
    background: var(--o365-gray-30);
    color: var(--o365-gray-160);
    text-decoration: none;
}

.rail-icon-btn.active {
    background: var(--o365-primary-light);
    color: var(--o365-primary);
}

.rail-icon-btn.active::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 8px;
    bottom: 8px;
    width: 3px;
    background: var(--o365-primary);
    border-radius: 0 2px 2px 0;
}

/* Hamburger toggle for nav panel */
.rail-hamburger {
    margin-bottom: 4px;
    position: relative;
}
.rail-hamburger::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 8px;
    right: 8px;
    height: 1px;
    background: var(--o365-gray-30);
}

.rail-spacer {
    flex: 1;
}

/* Rail avatar */
.rail-avatar-btn { padding: 0; }

.rail-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--o365-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    transition: box-shadow 0.15s;
}

.rail-avatar-btn:hover .rail-avatar {
    box-shadow: 0 0 0 2px var(--o365-primary-light);
}

/* Notification badge */
.modern-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    border-radius: 8px;
    background: var(--o365-red);
    color: white;
    font-size: 10px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

/* ── User Popover ────────────────────── */
.user-popover {
    position: absolute;
    bottom: 56px;
    left: 60px;
    width: 260px;
    background: var(--o365-white);
    border: 1px solid var(--o365-gray-30);
    border-radius: 12px;
    box-shadow: 0 8px 32px var(--shadow-color), 0 2px 8px var(--shadow-color);
    z-index: 10001;
    overflow: hidden;
    animation: popoverIn 0.15s ease;
}

@keyframes popoverIn {
    from { opacity: 0; transform: translateY(8px) scale(0.96); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.user-popover-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
}

.user-popover-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--o365-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    font-weight: 600;
    flex-shrink: 0;
}

.user-popover-name {
    font-weight: 600;
    font-size: 14px;
    color: var(--o365-gray-160);
}

.user-popover-divider {
    height: 1px;
    background: var(--o365-gray-30);
    margin: 0;
}

.user-popover-item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 10px 16px;
    border: none;
    background: none;
    color: var(--o365-gray-160);
    font-size: 13px;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.1s;
    font-family: inherit;
}

.user-popover-item:hover {
    background: var(--o365-gray-20);
    text-decoration: none;
    color: var(--o365-gray-160);
}

.user-popover-item i {
    font-size: 16px;
    width: 20px;
    text-align: center;
    color: var(--o365-gray-90);
}

.user-popover-logout {
    color: var(--o365-red);
}
.user-popover-logout i {
    color: var(--o365-red);
}

.user-popover-backdrop {
    position: fixed;
    inset: 0;
    z-index: 10000;
}

/* ── Navigation Panel (240px) ────────── */
.modern-nav-panel {
    width: 240px;
    min-width: 240px;
    background: var(--o365-white);
    border-right: 1px solid var(--o365-gray-30);
    display: flex;
    flex-direction: column;
    transition: width 0.2s ease, min-width 0.2s ease, opacity 0.15s ease;
    overflow: hidden;
    z-index: 10;
}

.modern-shell .modern-nav-panel.collapsed,
html[data-nav="collapsed"] .modern-nav-panel {
    width: 0 !important;
    min-width: 0 !important;
    border-right: none !important;
    opacity: 0;
    pointer-events: none;
    padding: 0 !important;
    overflow: hidden !important;
}

/* Deve restare allineata a .page-topbar (40px): le due colonne partono dalla stessa
   y, quindi i rispettivi border-bottom formano un'unica linea continua. */
.nav-panel-header {
    height: 40px;
    min-height: 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px 0 16px;
    border-bottom: 1px solid var(--o365-gray-30);
}

.nav-panel-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--o365-gray-160);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.nav-panel-toggle {
    width: 28px;
    height: 28px;
    border: none;
    background: transparent;
    border-radius: 6px;
    color: var(--o365-gray-90);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: all 0.12s;
}

.nav-panel-toggle:hover {
    background: var(--o365-gray-20);
    color: var(--o365-gray-160);
}

.nav-panel-body {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
}

/* Override the old rail styles inside the nav panel */
.modern-shell .modern-nav-panel .app-rail {
    width: 100% !important;
    min-width: 100% !important;
    background: transparent !important;
    border-right: none !important;
    overflow-x: hidden;
}

.modern-nav-panel .rail-nav {
    padding: 8px 0;
}

.modern-nav-panel .rail-item {
    width: 100%;
    flex-direction: row;
    padding: 8px 16px;
    gap: 10px;
    justify-content: flex-start;
}

.modern-nav-panel .rail-item i {
    font-size: 16px;
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.modern-nav-panel .rail-text {
    font-size: 13px;
    font-weight: 500;
    max-width: none;
    text-align: left;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.modern-nav-panel .rail-separator {
    margin: 8px 16px;
}

.modern-nav-panel .rail-section-label {
    text-align: left;
    padding: 8px 16px 4px;
    font-size: 10px;
}

.modern-nav-panel .rail-item.active::before {
    top: 6px;
    bottom: 6px;
}

/* ── Content Area ────────────────────── */
/* #148 round 2: padding 24→16 to recover ~16px vertical space */
.modern-content {
    flex: 1;
    overflow: auto;
    background: var(--o365-gray-10);
    padding: 16px;
    min-width: 0;
}

/* #246: standalone mode (?chrome=0). Niente rail, topbar, drawer, command palette: la
   pagina occupa l'intero viewport. Usato per le aperture in nuova scheda dei documenti
   per mantenere unica la "scheda di navigazione del programma". */
.modern-standalone {
    width: 100%;
    height: 100vh;
    height: 100dvh;
    overflow: auto;
    background: var(--o365-gray-10);
    padding: 12px;
    box-sizing: border-box;
}

/* ── Command Palette (Ctrl+K) ────────── */
.cmd-palette-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--overlay-bg);
    z-index: 300;
    align-items: flex-start;
    justify-content: center;
    padding-top: min(20vh, 160px);
    padding-top: min(20dvh, 160px);
    backdrop-filter: blur(4px);
}

.cmd-palette-backdrop.show {
    display: flex;
    animation: fadeIn 0.1s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.cmd-palette {
    width: 560px;
    max-width: 90vw;
    background: var(--o365-white);
    border: 1px solid var(--o365-gray-30);
    border-radius: 14px;
    box-shadow: 0 16px 64px rgba(0,0,0,0.2);
    overflow: hidden;
    animation: paletteIn 0.15s ease;
}

@keyframes paletteIn {
    from { opacity: 0; transform: translateY(-12px) scale(0.97); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.cmd-palette-input-wrap {
    display: flex;
    align-items: center;
    padding: 14px 16px;
    gap: 10px;
    border-bottom: 1px solid var(--o365-gray-30);
}

.cmd-palette-input-wrap i {
    font-size: 18px;
    color: var(--o365-gray-90);
    flex-shrink: 0;
}

.cmd-palette-input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 15px;
    color: var(--o365-gray-160);
    outline: none;
    font-family: inherit;
}

.cmd-palette-input::placeholder {
    color: var(--o365-gray-90);
}

.cmd-palette-input-wrap kbd {
    padding: 2px 8px;
    border-radius: 4px;
    background: var(--o365-gray-20);
    border: 1px solid var(--o365-gray-30);
    color: var(--o365-gray-90);
    font-size: 11px;
    font-family: inherit;
    flex-shrink: 0;
}

.cmd-palette-results {
    max-height: 300px;
    overflow-y: auto;
}

.cmd-palette-hint {
    padding: 12px 16px;
    color: var(--o365-gray-90);
    font-size: 13px;
}

/* ── Responsive ──────────────────────── */
@media (max-width: 1279px) {
    .modern-nav-panel:not(.collapsed) {
        position: fixed;
        left: 56px;
        top: 0;
        bottom: 0;
        box-shadow: 4px 0 16px var(--shadow-color);
    }
}

@media (max-width: 1023px) {
    .modern-rail {
        width: 48px;
        min-width: 48px;
    }
    .rail-icon-btn { width: 36px; height: 36px; font-size: 16px; }
    .rail-avatar { width: 28px; height: 28px; font-size: 11px; }
    .modern-content { padding: 16px; }
}

/* Mobile top bar - hidden on desktop */
.mobile-topbar {
    display: none;
    height: 48px;
    background: var(--o365-gray-20);
    border-bottom: 1px solid var(--o365-gray-30);
    align-items: center;
    padding: env(safe-area-inset-top, 0) max(12px, env(safe-area-inset-right, 0)) 0 max(12px, env(safe-area-inset-left, 0));
    gap: 12px;
    z-index: 50;
}
.mobile-topbar .rail-logo img { width: 28px; height: 28px; border-radius: 6px; }
.mobile-topbar-title { font-weight: 600; font-size: 15px; color: var(--o365-gray-160); flex: 1; }
.mobile-topbar-btn { width: 36px; height: 36px; border: none; background: transparent; border-radius: 8px; color: var(--o365-gray-130); cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 18px; }
.mobile-topbar-btn:hover { background: var(--o365-gray-30); }

/* Mobile drawer overlay */
.mobile-drawer-backdrop { display: none; position: fixed; inset: 0; background: var(--overlay-bg); z-index: 150; }
.mobile-drawer-backdrop.show { display: block; }
.mobile-drawer { position: fixed; left: 0; top: 0; bottom: 0; width: 280px; height: 100vh; height: 100dvh; padding-left: env(safe-area-inset-left, 0); padding-bottom: env(safe-area-inset-bottom, 0); background: var(--o365-white); z-index: 151; transform: translateX(-100%); visibility: hidden; transition: transform 0.2s ease, visibility 0s linear 0.2s; box-shadow: 4px 0 16px var(--shadow-color); overflow-y: auto; overscroll-behavior: contain; }
.mobile-drawer.show { transform: translateX(0); visibility: visible; transition-delay: 0s; }
.mobile-drawer-header { position: sticky; top: 0; z-index: 1; min-height: 56px; padding: max(8px, env(safe-area-inset-top, 0)) 12px 8px 20px; display: flex; align-items: center; justify-content: space-between; gap: 12px; background: var(--o365-white); border-bottom: 1px solid var(--o365-gray-30); }
.mobile-drawer-title { color: var(--o365-gray-190); font-size: 15px; font-weight: 600; }
.mobile-drawer-close { width: 44px; height: 44px; display: inline-flex; align-items: center; justify-content: center; border: 0; border-radius: 8px; background: transparent; color: var(--o365-gray-160); font-size: 18px; }
.mobile-drawer-close:hover { background: var(--o365-gray-30); }
.mobile-drawer-open { overscroll-behavior: none; }
.mobile-drawer .app-rail { display: block !important; width: 100% !important; min-width: 100% !important; background: transparent !important; border-right: none !important; }
.mobile-drawer .rail-item { flex-direction: row; width: 100%; padding: 10px 20px; gap: 12px; justify-content: flex-start; }
.mobile-drawer .rail-item i { font-size: 18px; width: 24px; text-align: center; }
.mobile-drawer .rail-text { font-size: 14px; max-width: none; text-align: left; }
.mobile-drawer .rail-separator { margin: 8px 20px; }
.mobile-drawer .rail-section-label { text-align: left; padding: 8px 20px 4px; }

@media (max-width: 767px) {
    .modern-rail { display: none; }
    .modern-nav-panel { display: none !important; }
    .modern-content { padding: 12px; }
    .mobile-topbar { display: flex; }
    .modern-shell { flex-direction: column; }
}

/* ── Dark mode adjustments ───────────── */
[data-theme="dark"] .modern-rail {
    background: var(--o365-gray-10);
}

[data-theme="dark"] .modern-nav-panel {
    background: var(--o365-gray-10);
}

[data-theme="dark"] .user-popover {
    background: var(--o365-gray-20);
    border-color: var(--o365-gray-40);
}

[data-theme="dark"] .cmd-palette {
    background: var(--o365-gray-20);
    border-color: var(--o365-gray-40);
}

/* ── Accessibility utilities ─────────────────────────── */
.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.skip-link {
    position: absolute;
    top: -100px;
    left: 8px;
    background: var(--o365-gray-190);
    color: var(--o365-gray-10);
    padding: 8px 16px;
    border-radius: 6px;
    z-index: 9999;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: top 0.15s ease;
}

.skip-link:focus {
    top: 8px;
    outline: 2px solid var(--accent-blue, #2563eb);
    outline-offset: 2px;
}

/* ── Main area: vertical column hosting topbar + content ── */
.modern-main-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
    height: 100%;
}

/* ── Persistent page topbar (desktop) ────────────────── */
/* #148 round 2: compressed for vertical space recovery
   (height 56→40, icon 32→26, breadcrumb 11→10, title 16→14) */
.page-topbar {
    flex-shrink: 0;
    height: 40px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 20px;
    background: var(--o365-gray-10);
    border-bottom: 1px solid var(--o365-gray-30);
    z-index: 50;
}

.page-topbar-icon {
    width: 26px;
    height: 26px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
    background: var(--o365-gray-30);
}

.page-topbar-text {
    display: flex;
    flex-direction: column;
    min-width: 0;
    flex: 1;
    line-height: 1.2;
}

.page-topbar-section {
    /* WCAG AA: gray-130 #6B665C on gray-10 #FAF6F0 = ~5.8:1 (passes 4.5:1 for small text) */
    color: var(--o365-gray-130);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-decoration: none;
}

.page-topbar-section-link {
    cursor: pointer;
    transition: color 0.15s ease;
}

.page-topbar-section-link:hover,
.page-topbar-section-link:focus-visible {
    color: var(--o365-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.page-topbar-section-link i {
    font-size: 9px;
    margin-left: 4px;
    vertical-align: baseline;
}

.page-topbar-breadcrumb {
    display: flex;
    align-items: center;
    gap: 4px;
    min-width: 0;
    overflow: hidden;
}

.page-topbar-section-sep {
    color: var(--o365-gray-90);
    font-size: 9px;
    flex-shrink: 0;
}

.page-topbar-title {
    /* h1 in topbar; aria-labelledby points here */
    color: var(--o365-gray-190);
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin: 0;
}

.page-topbar-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
    flex-shrink: 0;
}

/* Hide desktop topbar on mobile — mobile-topbar handles that breakpoint */
@media (max-width: 767px) {
    .page-topbar {
        display: none;
    }
}

/* Reduce content top padding when topbar is present (visual breathing room) */
/* #148 round 2: 20→12 to recover vertical space */
.modern-main-area .modern-content {
    padding-top: 12px;
}

/* main:focus default browser outline removed since tabindex=-1 is just for skip-link target */
.modern-content:focus {
    outline: none;
}

/* ── Shared responsive layout primitives (#330) ───────── */
.responsive-toolbar,
.responsive-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

.responsive-toolbar {
    justify-content: space-between;
    flex-wrap: wrap;
}

.responsive-actions {
    margin-left: auto;
    flex-wrap: wrap;
}

.responsive-form-grid,
.responsive-card-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.responsive-table-region {
    max-width: 100%;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    -webkit-overflow-scrolling: touch;
}

.responsive-dialog {
    width: min(100% - 32px, 720px);
    max-height: min(85vh, 760px);
    max-height: min(85dvh, 760px);
    overflow: auto;
    overscroll-behavior: contain;
}

.responsive-master-detail {
    display: flex;
    min-width: 0;
    min-height: 0;
}

@media (max-width: 1200px) {
    .responsive-form-grid,
    .responsive-card-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}