:root {
    --accent: #7dd3fc;
    --accent-dark: #38bdf8;
    --accent-soft: rgba(125, 211, 252, .10);
    --accent-border: rgba(125, 211, 252, .22);
    --gold: var(--accent);
    --gold-dark: var(--accent-dark);
    --gold-soft: var(--accent-soft);
    --gold-border: var(--accent-border);
    --dark-bg: #0f172a;
    --dark-panel: #172033;
    --dark-panel-2: #1b263b;
    --dark-border: #2b3a55;
    --dark-text: #e5edf7;
    --dark-muted: #94a3b8;
    --light-bg: #f5f7fb;
    --light-panel: #ffffff;
    --light-panel-2: #eef3f8;
    --light-border: #d8e1ea;
    --light-text: #172033;
    --light-muted: #64748b;
    --panel-bg: var(--dark-panel);
    --card-border: var(--dark-border);
    --border-color: var(--dark-border);
    --muted-text: var(--dark-muted);
    --text-main: var(--dark-text);
    --text-color: var(--dark-text);
    --input-bg: #111c2e;
    --button-bg: #172033;
    --table-header-bg: #111c2e;
    --soft-shadow: 0 10px 28px rgba(0, 0, 0, .18);
    --small-shadow: 0 6px 18px rgba(0, 0, 0, .14);
    --panel-radius: 18px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
    font-family: Inter, "Segoe UI", Arial, sans-serif;
    background: var(--dark-bg);
    color: var(--dark-text);
}

button,
input,
select,
textarea {
    font-family: inherit;
}

a {
    color: inherit;
}

::selection {
    background: rgba(125, 211, 252, .25);
    color: #ffffff;
}

/* =========================
   Global Shell
   ========================= */

.inv-shell {
    min-height: 100vh;
    display: flex;
    font-family: Inter, "Segoe UI", Arial, sans-serif;
    overflow: hidden;
}

.inv-main {
    flex: 1;
    min-width: 0;
}

.inv-content {
    min-height: calc(100vh - 58px);
    padding: 28px 42px;
}

/* =========================
   Dark Professional Theme
   ========================= */

.inv-shell[data-theme="dark"] {
    background: linear-gradient(135deg, #0f172a 0%, #111827 100%);
    color: var(--dark-text);
    --panel-bg: var(--dark-panel);
    --card-border: var(--dark-border);
    --border-color: var(--dark-border);
    --muted-text: var(--dark-muted);
    --text-main: var(--dark-text);
    --text-color: var(--dark-text);
    --input-bg: #111c2e;
    --button-bg: #172033;
    --table-header-bg: #111c2e;
}

    .inv-shell[data-theme="dark"] .inv-sidebar,
    .inv-shell[data-theme="dark"] .inv-header {
        background: #111c2e;
        color: var(--dark-text);
    }

    .inv-shell[data-theme="dark"] .inv-content {
        background: #0f172a;
        color: var(--dark-text);
    }

    .inv-shell[data-theme="dark"] .inv-sidebar {
        border-right: 1px solid var(--dark-border);
    }

    .inv-shell[data-theme="dark"] .inv-header {
        border-bottom: 1px solid var(--dark-border);
    }

    .inv-shell[data-theme="dark"] .nav-item {
        color: #dbe6f3;
    }

        .inv-shell[data-theme="dark"] .nav-item.active,
        .inv-shell[data-theme="dark"] .nav-item:hover {
            background: rgba(125, 211, 252, .10);
            color: var(--accent);
        }

    .inv-shell[data-theme="dark"] .header-user span {
        color: var(--dark-muted);
    }

/* =========================
   Light Professional Theme
   ========================= */

.inv-shell[data-theme="light"] {
    background: var(--light-bg);
    color: var(--light-text);
    --panel-bg: var(--light-panel);
    --card-border: var(--light-border);
    --border-color: var(--light-border);
    --muted-text: var(--light-muted);
    --text-main: var(--light-text);
    --text-color: var(--light-text);
    --input-bg: #ffffff;
    --button-bg: #f8fafc;
    --table-header-bg: #eef3f8;
}

    .inv-shell[data-theme="light"] .inv-sidebar,
    .inv-shell[data-theme="light"] .inv-header {
        background: var(--light-panel);
        color: var(--light-text);
        border-color: var(--light-border);
    }

    .inv-shell[data-theme="light"] .inv-content {
        background: var(--light-bg);
        color: var(--light-text);
    }

    .inv-shell[data-theme="light"] .nav-item {
        color: var(--light-text);
    }

        .inv-shell[data-theme="light"] .nav-item.active,
        .inv-shell[data-theme="light"] .nav-item:hover {
            background: rgba(14, 165, 233, .10);
            color: #0284c7;
        }

    .inv-shell[data-theme="light"] .header-user span {
        color: var(--light-muted);
    }

/* =========================
   Sidebar
   ========================= */

.inv-sidebar {
    width: 260px;
    min-width: 260px;
    min-height: 100vh;
    padding: 18px 14px;
    transition: width .25s ease, min-width .25s ease;
}

    .inv-sidebar.collapsed {
        width: 78px;
        min-width: 78px;
    }

/* Logo */

.inv-logo {
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    padding: 4px 0 22px !important;
    margin: 0 !important;
}

.logo-card {
    background: #ffffff !important;
    border-radius: 16px !important;
    padding: 10px 12px !important;
    width: 185px !important;
    min-height: 62px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    overflow: hidden !important;
    box-shadow: var(--small-shadow) !important;
}

.sidebar-logo-img {
    display: block !important;
    width: 100% !important;
    max-width: 162px !important;
    height: auto !important;
    object-fit: contain !important;
}

.inv-sidebar.collapsed .logo-card {
    width: 52px !important;
    min-height: 46px !important;
    padding: 6px !important;
    border-radius: 12px !important;
}

.inv-sidebar.collapsed .sidebar-logo-img {
    max-width: 42px !important;
}

/* Collapse Button */

.collapse-btn {
    width: 34px;
    height: 34px;
    border: 1px solid var(--accent-border);
    border-radius: 10px;
    background: var(--accent-soft);
    color: var(--accent);
    font-weight: 900;
    cursor: pointer;
    margin: 0 0 18px 0;
    box-shadow: none;
}

    .collapse-btn:hover {
        background: rgba(125, 211, 252, .18);
    }

.inv-sidebar.collapsed .collapse-btn {
    margin-left: 7px;
}

/* Nav */

.inv-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    padding: 11px 12px;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.2;
    transition: background .2s ease, color .2s ease, transform .2s ease, border-color .2s ease;
    white-space: nowrap;
    border: 1px solid transparent;
}

    .nav-item:hover {
        transform: translateX(2px);
    }

    .nav-item.active {
        background: var(--accent-soft);
        border: 1px solid var(--accent-border);
        color: var(--accent) !important;
        font-weight: 700;
    }

        .nav-item.active .nav-icon {
            color: var(--accent);
        }

    .nav-item.nav-loading {
        pointer-events: none;
        opacity: .85;
    }

.nav-icon {
    width: 24px;
    min-width: 24px;
    text-align: center;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}

.nav-title {
    overflow: hidden;
    text-overflow: ellipsis;
}

.inv-sidebar.collapsed .nav-title,
.inv-sidebar.collapsed .side-debug,
.inv-sidebar.collapsed .logo-text {
    display: none !important;
}

.inv-sidebar.collapsed .nav-item {
    justify-content: center;
    padding: 12px 0;
}

.empty-menu {
    color: var(--accent);
    font-size: 13px;
    padding: 12px;
    opacity: .85;
}

/* =========================
   Header
   ========================= */

.inv-header {
    height: 58px;
    padding: 0 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-user {
    display: flex;
    align-items: baseline;
    gap: 6px;
}

    .header-user b {
        font-size: 14px;
        color: inherit;
    }

    .header-user span {
        font-size: 13px;
    }

.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.role-pill,
.theme-btn,
.logout-btn,
.inv-btn {
    border-radius: 10px;
    padding: 9px 14px;
    font-weight: 700;
}

.role-pill {
    background: var(--accent-soft);
    color: var(--accent);
    border: 1px solid var(--accent-border);
}

.theme-btn,
.logout-btn,
.inv-btn.primary {
    background: var(--accent-soft);
    color: var(--accent);
    border: 1px solid var(--accent-border);
    cursor: pointer;
}

    .theme-btn:hover,
    .logout-btn:hover,
    .inv-btn.primary:hover {
        background: rgba(125, 211, 252, .18);
    }

.logout-btn {
    color: #bae6fd;
}

/* =========================
   Forms
   ========================= */

select,
input,
textarea {
    background-color: var(--input-bg) !important;
    color: var(--text-main) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 11px;
}

    select option {
        background-color: var(--panel-bg) !important;
        color: var(--text-main) !important;
    }

    select:focus,
    input:focus,
    textarea:focus {
        border-color: var(--accent) !important;
        outline: none !important;
        box-shadow: 0 0 0 3px rgba(125, 211, 252, .12);
    }

/* =========================
   Access Denied
   ========================= */

.access-denied-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--dark-bg);
    color: var(--dark-text);
    gap: 10px;
}

/* =========================
   Dashboard Theme Support
   ========================= */

.inv-shell[data-theme="dark"] .home-page {
    color: var(--dark-text);
}

.inv-shell[data-theme="dark"] .home-hero,
.inv-shell[data-theme="dark"] .hero-card,
.inv-shell[data-theme="dark"] .home-card {
    background: var(--dark-panel);
    border-color: var(--dark-border);
}

.inv-shell[data-theme="light"] .home-page {
    color: var(--light-text);
}

.inv-shell[data-theme="light"] .home-hero,
.inv-shell[data-theme="light"] .hero-card,
.inv-shell[data-theme="light"] .home-card {
    background: var(--light-panel);
    border-color: var(--light-border);
}

    .inv-shell[data-theme="light"] .hero-left p,
    .inv-shell[data-theme="light"] .home-card p,
    .inv-shell[data-theme="light"] .info-row span {
        color: var(--light-muted);
    }

/* =========================
   Compatibility Theme Layer
   ========================= */

.inv-shell[data-theme="dark"] {
    --inv-bg: var(--dark-bg);
    --inv-panel: var(--panel-bg);
    --inv-panel-2: var(--dark-panel-2);
    --inv-text: var(--dark-text);
    --inv-muted: var(--muted-text);
    --inv-border: var(--card-border);
    --inv-accent: var(--accent);
}

.inv-shell[data-theme="light"] {
    --inv-bg: var(--light-bg);
    --inv-panel: var(--panel-bg);
    --inv-panel-2: var(--light-panel-2);
    --inv-text: var(--light-text);
    --inv-muted: var(--muted-text);
    --inv-border: var(--card-border);
    --inv-accent: var(--accent);
}

/* Force internal pages to inherit system theme */

.admin-page,
.wc-page,
.wc-command-page,
.wells-v2-page,
.reports-page,
.my-reports-page,
.report-workspace-page,
.report-folder-page {
    color: inherit;
    background: transparent;
}

/* Common internal cards */

.admin-panel,
.admin-content,
.stat-card,
.wc-explorer-panel,
.wc-center-panel,
.wc-passport-panel,
.panel-v2,
.report-card,
.kpi-card,
.reports-table-card,
.my-reports-header,
.reports-toolbar,
.assessment-card,
.sequence-card,
.photo-card,
.valves-card {
    background: var(--panel-bg);
    border-color: var(--card-border);
    color: inherit;
    box-shadow: var(--soft-shadow);
}

/* =========================
   Tables
   ========================= */

table {
    color: inherit;
}

th {
    color: var(--muted-text);
}

td {
    color: var(--text-main);
}

/* =========================
   Loading
   ========================= */

.page-loading-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(15, 23, 42, .62);
    backdrop-filter: blur(8px);
    display: grid;
    place-items: center;
}

.page-loading-card {
    min-width: 260px;
    padding: 28px;
    border-radius: 20px;
    background: var(--panel-bg);
    border: 1px solid var(--card-border);
    color: var(--text-main);
    box-shadow: var(--soft-shadow);
    text-align: center;
}

.page-loading-spinner {
    width: 36px;
    height: 36px;
    margin: 0 auto 14px;
    border-radius: 50%;
    border: 3px solid rgba(125, 211, 252, .20);
    border-top-color: var(--accent);
    animation: inv-spin .8s linear infinite;
}

.page-loading-title {
    font-weight: 800;
    margin-bottom: 4px;
}

.page-loading-sub {
    color: var(--muted-text);
    font-size: 13px;
}

@keyframes inv-spin {
    to {
        transform: rotate(360deg);
    }
}

/* =========================
   Scrollbar
   ========================= */

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, .32);
    border-radius: 999px;
}

    ::-webkit-scrollbar-thumb:hover {
        background: rgba(125, 211, 252, .45);
    }

/* =========================
   Responsive
   ========================= */

@media (max-width: 900px) {
    .inv-sidebar {
        width: 82px;
        min-width: 82px;
    }

        .inv-sidebar .nav-title,
        .inv-sidebar .logo-text {
            display: none !important;
        }

    .inv-content {
        padding: 18px;
    }

    .header-user span {
        display: none;
    }
}