:root {
    --sidebar-width: 248px;
    --sidebar-collapsed-width: 88px;

    --sidebar-bg-1: #0b1220;
    --sidebar-bg-2: #162033;
    --sidebar-bg-3: #1f2d45;

    --page-bg: #eef3f9;
    --page-bg-accent: #f8fbff;
    --card-bg: rgba(255, 255, 255, 0.96);

    --text-main: #0f172a;
    --text-soft: #64748b;
    --text-faint: #94a3b8;

    --line-soft: rgba(148, 163, 184, 0.16);
    --line-strong: rgba(148, 163, 184, 0.26);

    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-soft: rgba(37, 99, 235, 0.14);

    --menu-hover: rgba(255, 255, 255, 0.08);
    --menu-active-bg: linear-gradient(135deg, rgba(59, 130, 246, 0.22), rgba(37, 99, 235, 0.42));
    --menu-active-text: #ffffff;
    --submenu-active: #93c5fd;

    --shadow-sidebar: 0 22px 60px rgba(15, 23, 42, 0.22);
    --shadow-card: 0 16px 38px rgba(15, 23, 42, 0.07);

    --radius-xl: 26px;
    --radius-lg: 20px;
    --radius-md: 16px;
    --radius-sm: 12px;

    --topbar-height: 74px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
    font-family: Arial, sans-serif;
    background:
        radial-gradient(circle at top right, rgba(37, 99, 235, 0.08), transparent 22%),
        linear-gradient(180deg, var(--page-bg-accent) 0%, var(--page-bg) 100%);
    color: var(--text-main);
}

body {
    overflow-y: auto;
    overflow-x: hidden;
}

a,
button,
input,
select {
    font: inherit;
}

.portal-shell {
    min-height: 100vh;
}

/* =========================
   SIDEBAR
========================= */

.portal-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--sidebar-width);
    background: linear-gradient(180deg, var(--sidebar-bg-1) 0%, var(--sidebar-bg-2) 48%, var(--sidebar-bg-3) 100%);
    color: #fff;
    z-index: 1200;
    transition: width 0.28s ease, transform 0.28s ease;
    box-shadow: var(--shadow-sidebar);
    overflow: hidden;
}

.portal-sidebar::before {
    content: "";
    position: absolute;
    top: -100px;
    right: -90px;
    width: 220px;
    height: 220px;
    background: radial-gradient(circle, rgba(255,255,255,0.12) 0%, rgba(255,255,255,0) 72%);
    pointer-events: none;
}

.portal-sidebar-inner {
    position: relative;
    z-index: 1;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.portal-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    min-height: var(--topbar-height);
    padding: 18px 18px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.portal-brand-icon {
    width: 46px;
    height: 46px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255,255,255,0.14);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
    backdrop-filter: blur(8px);
}

.portal-brand-text {
    font-size: 18px;
    font-weight: 800;
    letter-spacing: 0.2px;
    white-space: nowrap;
}

.portal-nav {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 14px 12px 14px;
}

.portal-nav::-webkit-scrollbar {
    width: 6px;
}

.portal-nav::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.18);
    border-radius: 999px;
}

.portal-menu,
.portal-submenu {
    list-style: none;
    margin: 0;
    padding: 0;
}

.portal-menu-item + .portal-menu-item {
    margin-top: 6px;
}

.portal-menu-link,
.portal-menu-toggle {
    width: 100%;
    border: 0;
    background: transparent;
    color: rgba(255,255,255,0.88);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 13px 14px;
    border-radius: 15px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    text-align: left;
    transition: background 0.22s ease, color 0.22s ease, transform 0.18s ease;
}

.portal-menu-link:hover,
.portal-menu-toggle:hover {
    background: var(--menu-hover);
    color: #fff;
    transform: translateX(2px);
}

.portal-menu-link.active,
.portal-menu-item.open > .portal-menu-toggle {
    background: var(--menu-active-bg);
    color: var(--menu-active-text);
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.06);
}

.portal-menu-icon {
    width: 22px;
    display: inline-flex;
    justify-content: center;
    flex-shrink: 0;
    font-size: 15px;
}

.portal-menu-text {
    flex: 1;
    white-space: nowrap;
}

.portal-menu-arrow {
    transition: transform 0.22s ease;
    font-size: 12px;
    opacity: 0.8;
}

.portal-has-submenu.open > .portal-menu-toggle .portal-menu-arrow {
    transform: rotate(90deg);
}

.portal-submenu {
    display: none;
    margin-top: 6px;
    padding: 4px 0 2px 46px;
}

.portal-has-submenu.open > .portal-submenu {
    display: block;
}

.portal-submenu li + li {
    margin-top: 4px;
}

.portal-submenu-link {
    display: block;
    color: rgba(255,255,255,0.76);
    text-decoration: none;
    padding: 10px 12px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    transition: background 0.2s ease, color 0.2s ease;
}

.portal-submenu-link:hover {
    background: rgba(255,255,255,0.07);
    color: #fff;
}

.portal-submenu-link.active {
    background: rgba(255,255,255,0.08);
    color: var(--submenu-active);
}

.portal-sidebar-footer {
    padding: 12px 14px 14px;
    border-top: 1px solid rgba(255,255,255,0.08);
    background: rgba(255,255,255,0.03);
}

.portal-collapse-btn {
    width: 100%;
    height: 44px;
    border: 1px solid rgba(255,255,255,0.10);
    border-radius: 14px;
    background: rgba(255,255,255,0.06);
    color: #fff;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.2s ease, transform 0.2s ease;
}

.portal-collapse-btn:hover {
    background: rgba(255,255,255,0.12);
}

/* =========================
   MAIN AREA
========================= */

.portal-main {
    margin-left: var(--sidebar-width);
    height: 100vh;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    min-width: 0;
    transition: margin-left 0.28s ease;
}

/* .portal-topbar {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    padding: 0 20px;
    flex-shrink: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(238, 243, 249, 0.82);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(148, 163, 184, 0.14);
} */

.portal-topbar-left {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 0;
}

.portal-topbar-title {
    font-size: 24px;
    font-weight: 800;
    color: #0f172a;
    line-height: 1.1;
}

.portal-mobile-toggle {
    width: 44px;
    height: 44px;
    border: 0;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    display: none;
    align-items: center;
    justify-content: center;
    padding: 0;
    cursor: pointer;
    box-shadow: 0 12px 24px rgba(37, 99, 235, 0.20);
}

.portal-mobile-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: #fff;
    border-radius: 999px;
    margin: 2px 0;
}

.portal-content {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 14px 20px 20px;
}

.portal-content::-webkit-scrollbar {
    width: 10px;
}

.portal-content::-webkit-scrollbar-thumb {
    background: #cfd8e6;
    border-radius: 999px;
}

.portal-content > *:first-child {
    margin-top: 0 !important;
}

.portal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.48);
    opacity: 0;
    visibility: hidden;
    transition: 0.22s ease;
    z-index: 1100;
}

/* =========================
   COLLAPSED
========================= */

body.sidebar-collapsed .portal-sidebar {
    width: var(--sidebar-collapsed-width);
}

body.sidebar-collapsed .portal-main {
    margin-left: var(--sidebar-collapsed-width);
}

body.sidebar-collapsed .portal-brand {
    justify-content: center;
    padding-left: 10px;
    padding-right: 10px;
}

body.sidebar-collapsed .portal-brand-text,
body.sidebar-collapsed .portal-menu-text,
body.sidebar-collapsed .portal-menu-arrow,
body.sidebar-collapsed .portal-submenu {
    display: none !important;
}

body.sidebar-collapsed .portal-menu-link,
body.sidebar-collapsed .portal-menu-toggle {
    justify-content: center;
    padding-left: 10px;
    padding-right: 10px;
}

body.sidebar-collapsed .portal-sidebar-footer {
    padding-left: 10px;
    padding-right: 10px;
}

body.sidebar-collapsed .portal-collapse-btn {
    display: flex;
    align-items: center;
    justify-content: center;
}

body.sidebar-collapsed .portal-collapse-btn i {
    transform: rotate(180deg);
}

/* =========================
   GLOBAL CARD HELPERS
========================= */

.portal-content .page-card,
.portal-content .content-card,
.portal-content .card,
.portal-content .panel {
    background: var(--card-bg);
    border: 1px solid rgba(255,255,255,0.7);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
}

/* =========================
   MOBILE
========================= */

@media (max-width: 992px) {
    html,
    body {
        height: auto;
    }

    body {
        overflow-y: auto;
        overflow-x: hidden;
    }

    .portal-sidebar {
        transform: translateX(-100%);
        width: min(84vw, 290px);
    }

    .portal-main {
        margin-left: 0 !important;
        height: auto;
        min-height: 100vh;
    }

    .portal-mobile-toggle {
        display: inline-flex;
    }

    .portal-topbar {
        padding: 0 16px;
    }

    .portal-topbar-title {
        font-size: 21px;
    }

    .portal-content {
        min-height: auto;
        overflow: visible;
        padding: 16px;
    }

    body.sidebar-mobile-open .portal-sidebar {
        transform: translateX(0);
    }

    body.sidebar-mobile-open .portal-overlay {
        opacity: 1;
        visibility: visible;
    }
}