/**
 * NETZERO ESG - Core Layout
 * ==========================
 * Layout classes for unified sidebar + header + content structure.
 * Requires: design-tokens.css
 */

/* =========================================================================
   RESET & BASE
   ========================================================================= */
*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    font-family: var(--nz-font-family);
    background-color: var(--nz-gray-50);
    color: var(--nz-gray-800);
    line-height: var(--nz-leading-normal);
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

/* =========================================================================
   SKIP LINK (Accessibility)
   ========================================================================= */
.nz-skip-link {
    position: absolute;
    top: -100%;
    left: var(--nz-space-4);
    background: var(--nz-primary-500);
    color: #fff;
    padding: var(--nz-space-2) var(--nz-space-4);
    border-radius: var(--nz-radius);
    z-index: var(--nz-z-tooltip);
    font-weight: var(--nz-font-semibold);
    text-decoration: none;
    transition: top var(--nz-transition-fast);
}

.nz-skip-link:focus {
    top: var(--nz-space-2);
    color: #fff;
}

/* =========================================================================
   SIDEBAR
   ========================================================================= */
.nz-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--nz-sidebar-width);
    background: #111827; /* fallback */
    background: linear-gradient(180deg, #111827, #1f2937);
    background: linear-gradient(180deg, var(--nz-gray-900, #111827), var(--nz-gray-800, #1f2937));
    color: #d1d5db;
    color: var(--nz-gray-300, #d1d5db);
    display: flex;
    flex-direction: column;
    z-index: var(--nz-z-sidebar, 1000);
    transition: transform var(--nz-transition-slow), width var(--nz-transition-slow);
    overflow: hidden;
}

/* Module accent stripe at top */
.nz-sidebar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--nz-module-accent, var(--nz-primary-500));
}

/* Brand area */
.nz-sidebar-brand {
    display: flex;
    align-items: center;
    gap: var(--nz-space-3);
    padding: var(--nz-space-5) var(--nz-space-5);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    text-decoration: none;
    color: #fff;
    flex-shrink: 0;
}

.nz-sidebar-brand:hover {
    color: #fff;
    text-decoration: none;
}

.nz-sidebar-brand-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--nz-radius);
    background: var(--nz-module-accent, var(--nz-primary-500));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--nz-text-lg);
    color: #fff;
    flex-shrink: 0;
}

.nz-sidebar-brand-text {
    overflow: hidden;
}

.nz-sidebar-brand-title {
    font-size: var(--nz-text-sm);
    font-weight: var(--nz-font-bold);
    color: #fff;
    white-space: nowrap;
    line-height: var(--nz-leading-tight);
}

.nz-sidebar-brand-subtitle {
    font-size: var(--nz-text-xs);
    color: #9ca3af;
    color: var(--nz-gray-400, #9ca3af);
    white-space: nowrap;
}

/* Sidebar nav */
.nz-sidebar-nav {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--nz-space-3) var(--nz-space-3);
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
}

.nz-sidebar-nav::-webkit-scrollbar {
    width: 4px;
}

.nz-sidebar-nav::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
}

.nz-sidebar-section {
    margin-bottom: var(--nz-space-4);
}

.nz-sidebar-section-title {
    font-size: var(--nz-text-xs, 0.75rem);
    font-weight: var(--nz-font-semibold, 600);
    color: #6b7280;
    color: var(--nz-gray-500, #6b7280);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--nz-space-2) var(--nz-space-3);
    margin-bottom: var(--nz-space-1);
}

.nz-sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--nz-space-3, 0.75rem);
    padding: var(--nz-space-2, 0.5rem) var(--nz-space-3, 0.75rem);
    border-radius: var(--nz-radius, 8px);
    color: #d1d5db;
    color: var(--nz-gray-300, #d1d5db);
    text-decoration: none;
    font-size: var(--nz-text-sm, 0.875rem);
    font-weight: var(--nz-font-medium, 500);
    transition: all var(--nz-transition-fast);
    white-space: nowrap;
}

.nz-sidebar-link:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    text-decoration: none;
}

.nz-sidebar-link.active {
    background: var(--nz-module-accent, var(--nz-primary-600));
    color: #fff;
    font-weight: var(--nz-font-semibold);
}

.nz-sidebar-link i,
.nz-sidebar-link .fas,
.nz-sidebar-link .far,
.nz-sidebar-link .fab {
    width: 20px;
    text-align: center;
    font-size: var(--nz-text-sm);
    flex-shrink: 0;
}

.nz-sidebar-link .nz-badge-count {
    margin-left: auto;
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    font-size: var(--nz-text-xs);
    padding: 1px 8px;
    border-radius: var(--nz-radius-full);
    font-weight: var(--nz-font-semibold);
}

/* Sidebar footer */
.nz-sidebar-footer {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: var(--nz-space-3);
    flex-shrink: 0;
}

.nz-sidebar-footer .nz-sidebar-link {
    font-size: var(--nz-text-xs, 0.75rem);
    color: #d1d5db;
    color: var(--nz-gray-300, #d1d5db);
}

/* Sidebar overlay (mobile) */
.nz-sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--nz-z-sidebar) - 1);
    opacity: 0;
    transition: opacity var(--nz-transition-slow);
}

.nz-sidebar-overlay.active {
    opacity: 1;
}

/* =========================================================================
   HEADER
   ========================================================================= */
.nz-header {
    position: sticky;
    top: 0;
    height: var(--nz-header-height);
    background: #fff;
    border-bottom: 1px solid var(--nz-gray-200);
    display: flex;
    align-items: center;
    padding: 0 var(--nz-space-6);
    z-index: var(--nz-z-header);
    gap: var(--nz-space-4);
}

.nz-header-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    color: var(--nz-gray-600);
    border-radius: var(--nz-radius);
    cursor: pointer;
    transition: background var(--nz-transition-fast);
    flex-shrink: 0;
}

.nz-header-toggle:hover {
    background: var(--nz-gray-100);
}

.nz-header-breadcrumbs {
    flex: 1;
    min-width: 0;
}

.nz-header-actions {
    display: flex;
    align-items: center;
    gap: var(--nz-space-3);
    flex-shrink: 0;
}

/* Search trigger */
.nz-search-trigger {
    display: flex;
    align-items: center;
    gap: var(--nz-space-2);
    padding: var(--nz-space-2) var(--nz-space-3);
    background: var(--nz-gray-100);
    border: 1px solid var(--nz-gray-200);
    border-radius: var(--nz-radius);
    color: var(--nz-gray-500);
    font-size: var(--nz-text-sm);
    cursor: pointer;
    transition: all var(--nz-transition-fast);
    white-space: nowrap;
}

.nz-search-trigger:hover {
    background: var(--nz-gray-50);
    border-color: var(--nz-gray-300);
}

.nz-search-shortcut {
    font-size: var(--nz-text-xs);
    background: var(--nz-gray-200);
    padding: 1px 6px;
    border-radius: var(--nz-radius-sm);
    font-family: var(--nz-font-mono);
}

/* Company selector (header) */
.nz-company-selector {
    padding: var(--nz-space-1) var(--nz-space-3);
    border: 1px solid var(--nz-gray-200);
    border-radius: var(--nz-radius);
    background: var(--nz-gray-50);
    font-size: var(--nz-text-sm);
    color: var(--nz-gray-700);
    cursor: pointer;
}

/* Header user info */
.nz-header-user {
    display: flex;
    align-items: center;
    gap: var(--nz-space-2);
    font-size: var(--nz-text-sm);
    color: var(--nz-gray-600);
}

.nz-header-lang {
    color: var(--nz-gray-500);
    text-decoration: none;
    font-size: var(--nz-text-sm);
    padding: var(--nz-space-1);
    border-radius: var(--nz-radius-sm);
    transition: color var(--nz-transition-fast);
}

.nz-header-lang:hover {
    color: var(--nz-primary-600);
}

/* =========================================================================
   MAIN WRAPPER
   ========================================================================= */
.nz-main-wrapper {
    margin-left: var(--nz-sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left var(--nz-transition-slow);
}

/* =========================================================================
   CONTENT
   ========================================================================= */
.nz-content {
    flex: 1;
    padding: var(--nz-space-6);
    max-width: var(--nz-content-max-width);
    width: 100%;
    margin: 0 auto;
}

/* =========================================================================
   TOAST CONTAINER
   ========================================================================= */
.nz-toast-container {
    position: fixed;
    top: calc(var(--nz-header-height) + var(--nz-space-4));
    right: var(--nz-space-4);
    z-index: var(--nz-z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--nz-space-2);
    pointer-events: none;
    max-width: 420px;
    width: 100%;
}

.nz-toast {
    pointer-events: auto;
    display: flex;
    align-items: flex-start;
    gap: var(--nz-space-3);
    padding: var(--nz-space-3) var(--nz-space-4);
    background: #fff;
    border-radius: var(--nz-radius-md);
    box-shadow: var(--nz-shadow-lg);
    border-left: 4px solid var(--nz-gray-400);
    animation: nz-toast-in 300ms ease forwards;
    font-size: var(--nz-text-sm);
}

.nz-toast.nz-toast-success { border-left-color: var(--nz-success); }
.nz-toast.nz-toast-danger  { border-left-color: var(--nz-danger); }
.nz-toast.nz-toast-warning { border-left-color: var(--nz-warning); }
.nz-toast.nz-toast-info    { border-left-color: var(--nz-info); }

.nz-toast-icon {
    font-size: var(--nz-text-lg);
    flex-shrink: 0;
    margin-top: 1px;
}

.nz-toast-success .nz-toast-icon { color: var(--nz-success); }
.nz-toast-danger .nz-toast-icon  { color: var(--nz-danger); }
.nz-toast-warning .nz-toast-icon { color: var(--nz-warning); }
.nz-toast-info .nz-toast-icon    { color: var(--nz-info); }

.nz-toast-body {
    flex: 1;
    min-width: 0;
}

.nz-toast-message {
    color: var(--nz-gray-800);
    line-height: var(--nz-leading-normal);
}

.nz-toast-close {
    background: none;
    border: none;
    color: var(--nz-gray-400);
    cursor: pointer;
    padding: 0;
    font-size: var(--nz-text-lg);
    line-height: 1;
    flex-shrink: 0;
}

.nz-toast-close:hover {
    color: var(--nz-gray-600);
}

.nz-toast.nz-toast-out {
    animation: nz-toast-out 200ms ease forwards;
}

@keyframes nz-toast-in {
    from { opacity: 0; transform: translateX(100%); }
    to   { opacity: 1; transform: translateX(0); }
}

@keyframes nz-toast-out {
    from { opacity: 1; transform: translateX(0); }
    to   { opacity: 0; transform: translateX(100%); }
}

/* =========================================================================
   FOOTER
   ========================================================================= */
.nz-footer {
    text-align: center;
    padding: var(--nz-space-4) var(--nz-space-6);
    border-top: 1px solid var(--nz-gray-200);
    font-size: var(--nz-text-xs);
    color: var(--nz-gray-400);
}

.nz-footer strong {
    color: var(--nz-gray-500);
    font-weight: var(--nz-font-medium);
}

.nz-footer i {
    color: var(--nz-primary-500);
}

/* =========================================================================
   FOCUS INDICATORS (Accessibility)
   ========================================================================= */
*:focus-visible {
    outline: 2px solid var(--nz-primary-500);
    outline-offset: 2px;
}

/* =========================================================================
   RESPONSIVE - TABLET
   ========================================================================= */
@media (max-width: 1024px) {
    .nz-sidebar {
        transform: translateX(-100%);
    }

    .nz-sidebar.open {
        transform: translateX(0);
    }

    .nz-sidebar-overlay.active {
        display: block;
    }

    .nz-main-wrapper {
        margin-left: 0;
    }

    .nz-header-toggle {
        display: flex;
    }

    .nz-search-trigger span:not(.nz-search-shortcut) {
        display: none;
    }

    .nz-search-shortcut {
        display: none;
    }
}

/* =========================================================================
   RESPONSIVE - MOBILE
   ========================================================================= */
@media (max-width: 768px) {
    .nz-content {
        padding: var(--nz-space-4);
    }

    .nz-header {
        padding: 0 var(--nz-space-4);
    }

    .nz-toast-container {
        left: var(--nz-space-4);
        right: var(--nz-space-4);
        max-width: none;
    }

    .nz-company-selector {
        max-width: 140px;
    }
}

@media (max-width: 576px) {
    .nz-header-actions {
        gap: var(--nz-space-2);
    }

    .nz-search-trigger {
        padding: var(--nz-space-2);
    }
}