/* ============================================================
   FERSA — Modern responsive ERP layout
   Replaces the old inline <style> block in _Layout.cshtml.
   Desktop  (>1200px): expandable sidebar, remembers your choice
   Tablet   (768-1200): slim icon rail, expands as an overlay
   Mobile   (<768px):   hidden drawer opened by the hamburger
   ============================================================ */

:root {
    --navy: #143655;
    --navy2: #0B1C31;
    --blue: #2C6D91;
    --cyan: #55B2CF;
    --lime: #88B236;
    --bg: #F4F8FB;
    --card: #FFFFFF;
    --border: #e2e8f0;
    --muted: #5a7184;
    --side-w: 290px;   /* expanded sidebar width   */
    --rail-w: 76px;    /* collapsed icon-rail width */
    --anim: .25s ease; /* transition speed (200-300ms band) */
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Roboto, sans-serif;
}

body {
    background: var(--bg);
    min-height: 100vh;
}

/* ---------- Sidebar ---------- */
.sidebar {
    width: var(--side-w);
    height: 100vh;
    background: var(--navy);
    position: fixed;
    top: 0;
    left: 0;
    color: #fff;
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 100;
    transition: width var(--anim), transform var(--anim);
    will-change: width, transform;
}

.logo {
    padding: 25px 25px 15px 25px;
    border-bottom: 1px solid rgba(255,255,255,.1);
    display: flex;
    align-items: center;
    gap: 12px;
}

    .logo h1 {
        letter-spacing: 4px;
        font-size: 24px;
    }

    .logo p {
        color: #b8c8d8;
        font-size: 12px;
        margin-top: 4px;
    }

/* Compact brand mark shown only when the rail is collapsed */
.logo-mark {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--lime);
    color: var(--navy);
    font-weight: 700;
    font-size: 20px;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.user-profile {
    padding: 15px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid rgba(255,255,255,.1);
    margin-bottom: 8px;
}

.user-avatar {
    width: 44px;
    height: 44px;
    background: var(--lime);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: bold;
    color: var(--navy);
    flex-shrink: 0;
}

.user-info {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-size: 14px;
    font-weight: 600;
    color: #fff;
}

.user-role {
    font-size: 11px;
    color: #b8c8d8;
    margin-top: 2px;
}

.menu-item {
    width: 100%;
}

.menu-head {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: #dbe6ef;
    cursor: pointer;
    transition: background 0.15s;
    font-size: 14px;
    border-left: 3px solid transparent;
    text-decoration: none;
    white-space: nowrap;
}

    .menu-head:hover {
        background: rgba(255,255,255,.05);
    }

    .menu-head.active {
        background: rgba(136,178,54,.15);
        border-left-color: var(--lime);
        color: #fff;
    }

    .menu-head:focus-visible {
        outline: 2px solid var(--lime);
        outline-offset: -2px;
    }

    .menu-head .emoji-icon, .menu-head i {
        font-size: 18px;
        width: 24px;
        text-align: center;
        flex-shrink: 0;
    }

    .menu-head .chevron {
        margin-left: auto;
        font-size: 12px;
        transition: transform 0.2s;
    }

    .menu-head.open .chevron {
        transform: rotate(90deg);
    }

.menu-label {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.submenu {
    display: none;
    background: rgba(0,0,0,.2);
    padding-left: 20px;
}

    .submenu.open {
        display: block;
    }

    .submenu a, .submenu .menu-item-link {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 8px 20px 8px 44px;
        color: #cbd5e1;
        text-decoration: none;
        font-size: 13px;
        transition: background 0.1s;
        cursor: pointer;
    }

        .submenu a:hover, .submenu .menu-item-link:hover {
            background: rgba(255,255,255,.08);
            color: #fff;
        }

    .submenu .sub-emoji {
        font-size: 14px;
        width: 20px;
        text-align: center;
    }

    .submenu .has-submenu > .menu-item-link {
        justify-content: space-between;
        padding-right: 20px;
    }

        .submenu .has-submenu > .menu-item-link .chevron {
            margin-left: auto;
            font-size: 10px;
            transition: transform 0.2s;
        }

    .submenu .has-submenu.open > .menu-item-link .chevron {
        transform: rotate(90deg);
    }

    .submenu .sub-submenu {
        display: none;
        padding-left: 24px;
    }

    .submenu .has-submenu.open .sub-submenu {
        display: block;
    }

.sidebar-footer {
    padding: 20px;
    margin-top: 20px;
    border-top: 1px solid rgba(255,255,255,.1);
}

    .sidebar-footer .menu-head {
        padding: 12px 0;
    }

/* ---------- Main area ---------- */
.main {
    margin-left: var(--side-w);
    min-height: 100vh;
    transition: margin-left var(--anim);
}

.topbar {
    background: var(--navy2);
    color: #fff;
    padding: 14px 25px;
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

    .topbar h2 {
        font-weight: 500;
        font-size: 20px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

.topbar-left {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

/* The single toggle: collapses on desktop, opens the drawer on tablet/mobile */
.nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    flex-shrink: 0;
    background: transparent;
    border: 0;
    color: #fff;
    font-size: 20px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s;
}

    .nav-toggle:hover {
        background: rgba(255,255,255,.12);
    }

    .nav-toggle:focus-visible {
        outline: 2px solid var(--lime);
        outline-offset: 2px;
    }

.topbar-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.topbar-subsidiary {
    background: rgba(255,255,255,.1);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    color: #b8c8d8;
    white-space: nowrap;
}

.topbar-logout {
    color: #b8c8d8;
    text-decoration: none;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

    .topbar-logout:hover {
        color: #fff;
    }

.content {
    padding: 25px;
}

.alert-success-toast {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: #166534;
    border-radius: 10px;
    padding: 12px 16px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-error-toast {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #991b1b;
    border-radius: 10px;
    padding: 12px 16px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* ---------- Backdrop (tablet overlay + mobile drawer) ---------- */
.nav-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(7,18,33,.45);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--anim), visibility var(--anim);
    z-index: 90;
}

body.nav-open .nav-backdrop {
    opacity: 1;
    visibility: visible;
}

/* ============================================================
   DESKTOP  (> 1200px)  — expandable, choice remembered
   ============================================================ */
@media (min-width: 1201px) {
    body.collapsed .sidebar { width: var(--rail-w); }
    body.collapsed .main { margin-left: var(--rail-w); }

    body.collapsed .menu-label,
    body.collapsed .chevron,
    body.collapsed .user-info,
    body.collapsed .logo-text,
    body.collapsed .fav-star { display: none; }

    body.collapsed .logo-mark { display: flex; }

    body.collapsed .logo,
    body.collapsed .user-profile,
    body.collapsed .menu-head {
        justify-content: center;
        padding-left: 0;
        padding-right: 0;
        gap: 0;
    }

    body.collapsed .menu-head { border-left-color: transparent; }
    body.collapsed .submenu { display: none !important; }
}

/* ============================================================
   TABLET  (768 - 1200px)  — slim rail, expands as overlay
   ============================================================ */
@media (min-width: 768px) and (max-width: 1200px) {
    /* default = icon rail */
    .sidebar { width: var(--rail-w); }
    .main { margin-left: var(--rail-w); }

    .menu-label,
    .chevron,
    .user-info,
    .logo-text,
    .fav-star { display: none; }

    .logo-mark { display: flex; }

    .logo,
    .user-profile,
    .menu-head {
        justify-content: center;
        padding-left: 0;
        padding-right: 0;
        gap: 0;
    }

    .submenu { display: none !important; }

    /* expanded as an OVERLAY — content does not move */
    body.nav-open .sidebar {
        width: var(--side-w);
        box-shadow: 4px 0 18px rgba(0,0,0,.28);
    }

    body.nav-open .menu-label { display: inline; }
    body.nav-open .chevron { display: block; }
    body.nav-open .user-info { display: block; }
    body.nav-open .logo-text { display: block; }
    body.nav-open .fav-star { display: block; }
    body.nav-open .logo-mark { display: none; }

    body.nav-open .logo { justify-content: flex-start; padding: 25px 25px 15px 25px; gap: 12px; }
    body.nav-open .user-profile { justify-content: flex-start; padding: 15px 20px; gap: 12px; }
    body.nav-open .menu-head { justify-content: flex-start; padding: 12px 20px; gap: 12px; }
    body.nav-open .submenu.open { display: block !important; }
}

/* ============================================================
   MOBILE  (< 768px)  — off-canvas drawer
   ============================================================ */
@media (max-width: 767px) {
    .sidebar {
        transform: translateX(-100%);
        box-shadow: 4px 0 18px rgba(0,0,0,.32);
    }

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

    .main { margin-left: 0; }
    .content { padding: 16px; }
    .logo-mark { display: none; }

    .topbar { padding: 12px 16px; }
}

/* ---------- Accessibility: honour reduced-motion ---------- */
@media (prefers-reduced-motion: reduce) {
    .sidebar,
    .main,
    .nav-backdrop,
    .menu-head .chevron {
        transition: none !important;
    }
}