/* ── Variables ── */
:root {
    --sidebar-w: 260px;
    --topbar-h: 60px;
    --accent: #13c9be;
    --accent-rgb: 19, 201, 190;

    /* Light mode */
    --sb-bg:         #ffffff;
    --sb-border:     #e9ecef;
    --sb-hover:      rgba(19,201,190,.06);
    --sb-active-bg:  rgba(19,201,190,.1);
    --sb-text:       #545a6d;
    --sb-section:    #adb5bd;
    --tb-bg:         #ffffff;
    --tb-border:     #e9ecef;
}

[data-bs-theme="dark"] {
    --sb-bg:         #1a2035;
    --sb-border:     rgba(255,255,255,.06);
    --sb-hover:      rgba(255,255,255,.05);
    --sb-active-bg:  rgba(19,201,190,.12);
    --sb-text:       #8b92a9;
    --sb-section:    #5a6282;
    --tb-bg:         #222736;
    --tb-border:     rgba(255,255,255,.06);
}

body { min-height: 100vh; }

/* ════════════════════════════
   SIDEBAR
════════════════════════════ */
#sidebar {
    position: fixed;
    top: 0; left: 0;
    width: var(--sidebar-w);
    height: 100vh;
    background: var(--sb-bg);
    border-right: 1px solid var(--sb-border);
    z-index: 1040;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: width .25s ease, transform .25s ease;
}

#sidebar.collapsed { width: 70px; }

/* Brand */
.sb-brand {
    height: var(--topbar-h);
    display: flex;
    align-items: center;
    gap: .75rem;
    padding: 0 1.125rem;
    border-bottom: 1px solid var(--sb-border);
    text-decoration: none;
    flex-shrink: 0;
    overflow: hidden;
}

.sb-brand-icon {
    width: 32px; height: 32px;
    background: var(--accent);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: .95rem;
    flex-shrink: 0;
}

.sb-brand-name {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--bs-body-color);
    white-space: nowrap;
    transition: opacity .2s;
}

#sidebar.collapsed .sb-brand-name { opacity: 0; pointer-events: none; }

/* Nav */
.sb-nav {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: .5rem 0;
    scrollbar-width: thin;
    scrollbar-color: var(--sb-border) transparent;
}

.sb-section {
    font-size: .625rem;
    font-weight: 600;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--sb-section);
    padding: .9rem 1.25rem .3rem;
    white-space: nowrap;
    transition: opacity .2s;
}

#sidebar.collapsed .sb-section { opacity: 0; }

.sb-link {
    display: flex;
    align-items: center;
    gap: .7rem;
    padding: .575rem 1.25rem;
    color: var(--sb-text);
    text-decoration: none;
    font-size: .8375rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    border-left: 3px solid transparent;
    transition: background .15s, color .15s, border-color .15s;
}

.sb-link:hover {
    background: var(--sb-hover);
    color: var(--accent);
}

.sb-link.active {
    background: var(--sb-active-bg);
    color: var(--accent);
    border-left-color: var(--accent);
}

.sb-icon {
    font-size: 1.05rem;
    width: 22px;
    text-align: center;
    flex-shrink: 0;
}

.sb-label { transition: opacity .2s; }

.sb-badge {
    margin-left: auto;
    font-size: .625rem;
    padding: .15rem .4rem;
    border-radius: 10px;
    background: var(--accent);
    color: #fff;
    font-weight: 600;
    flex-shrink: 0;
    transition: opacity .2s;
}

#sidebar.collapsed .sb-label,
#sidebar.collapsed .sb-badge { opacity: 0; pointer-events: none; }

/* User footer */
.sb-user {
    display: flex;
    align-items: center;
    gap: .7rem;
    padding: .875rem 1.125rem;
    border-top: 1px solid var(--sb-border);
    overflow: hidden;
    flex-shrink: 0;
}

.sb-avatar {
    width: 36px; height: 36px;
    border-radius: 50%;
    background: var(--bs-secondary-bg);
    border: 2px solid var(--sb-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .75rem;
    font-weight: 700;
    color: var(--sb-text);
    flex-shrink: 0;
}

.sb-user-info {
    flex: 1;
    min-width: 0;
    transition: opacity .2s;
}

.sb-user-name {
    font-size: .8rem;
    font-weight: 600;
    color: var(--bs-body-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.3;
}

.sb-user-role {
    font-size: .68rem;
    color: var(--sb-section);
    text-transform: uppercase;
    letter-spacing: .05em;
}

.sb-user-btns {
    display: flex;
    gap: .2rem;
    flex-shrink: 0;
    transition: opacity .2s;
}

.sb-user-btn {
    width: 28px; height: 28px;
    border: none;
    background: transparent;
    border-radius: 6px;
    color: var(--sb-text);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .85rem;
    cursor: pointer;
    transition: background .15s, color .15s;
}

.sb-user-btn:hover { background: var(--sb-hover); color: var(--accent); }
.sb-user-btn.danger:hover { color: #f43f5e; }

#sidebar.collapsed .sb-user-info,
#sidebar.collapsed .sb-user-btns { opacity: 0; pointer-events: none; }

/* ════════════════════════════
   TOPBAR
════════════════════════════ */
#topbar {
    position: fixed;
    top: 0;
    left: var(--sidebar-w);
    right: 0;
    height: var(--topbar-h);
    z-index: 1045;
    background: var(--tb-bg);
    border-bottom: 1px solid var(--tb-border);
    display: flex;
    align-items: center;
    padding: 0 1.25rem;
    gap: .5rem;
    transition: left .25s ease;
}

#topbar.sidebar-collapsed { left: 70px; }

.tb-icon-btn {
    width: 36px; height: 36px;
    border: none;
    background: transparent;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bs-secondary-color);
    font-size: 1.1rem;
    cursor: pointer;
    position: relative;
    transition: background .15s, color .15s;
    flex-shrink: 0;
}

.tb-icon-btn:hover {
    background: var(--bs-tertiary-bg);
    color: var(--bs-body-color);
}

/* Search */
.tb-search {
    position: relative;
    flex: 1;
    max-width: 380px;
}

.tb-search > .bi-search {
    position: absolute;
    left: .8rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--bs-secondary-color);
    font-size: .8rem;
    pointer-events: none;
}

.tb-search-input {
    width: 100%;
    height: 36px;
    padding: 0 2.5rem 0 2.2rem;
    border-radius: 8px;
    border: 1px solid var(--tb-border);
    background: var(--bs-tertiary-bg);
    color: var(--bs-body-color);
    font-size: .8125rem;
    outline: none;
    transition: border-color .15s, box-shadow .15s;
}

.tb-search-input::placeholder { color: var(--bs-secondary-color); }

.tb-search-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(var(--accent-rgb),.15);
}

.tb-search-kbd {
    position: absolute;
    right: .6rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: .65rem;
    color: var(--bs-secondary-color);
    border: 1px solid var(--tb-border);
    border-radius: 4px;
    padding: .1rem .35rem;
    line-height: 1.5;
}

/* Right side */
.tb-end {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: .15rem;
}

.tb-notif-badge {
    position: absolute;
    top: 4px; right: 4px;
    min-width: 17px; height: 17px;
    padding: 0 3px;
    border-radius: 9px;
    background: #f43f5e;
    color: #fff;
    font-size: .6rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--tb-bg);
    line-height: 1;
}

.tb-divider {
    width: 1px; height: 22px;
    background: var(--tb-border);
    margin: 0 .4rem;
}

/* User button */
.tb-user-btn {
    display: flex;
    align-items: center;
    gap: .5rem;
    padding: .25rem .5rem;
    border-radius: 8px;
    border: none;
    background: transparent;
    cursor: pointer;
    transition: background .15s;
}

.tb-user-btn:hover { background: var(--bs-tertiary-bg); }

.tb-user-avatar {
    width: 32px; height: 32px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    font-size: .75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.tb-user-name {
    font-size: .8rem;
    font-weight: 600;
    color: var(--bs-body-color);
    line-height: 1.2;
    white-space: nowrap;
}

.tb-user-role {
    font-size: .68rem;
    color: var(--bs-secondary-color);
    white-space: nowrap;
}

/* Notification dropdown */
.notif-dropdown {
    width: 320px;
    padding: 0;
    border-radius: 10px;
    border: 1px solid var(--bs-border-color);
    box-shadow: 0 8px 24px rgba(0,0,0,.1);
    overflow: hidden;
}

.notif-hdr {
    padding: .875rem 1rem;
    border-bottom: 1px solid var(--bs-border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.notif-item {
    display: flex;
    gap: .75rem;
    padding: .75rem 1rem;
    text-decoration: none;
    color: var(--bs-body-color);
    border-bottom: 1px solid var(--bs-border-color);
    transition: background .15s;
}

.notif-item:last-of-type { border-bottom: none; }
.notif-item:hover { background: var(--bs-tertiary-bg); }
.notif-item.unread { background: rgba(var(--accent-rgb),.04); }

.notif-icon {
    width: 36px; height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .875rem;
    flex-shrink: 0;
}

.notif-text { font-size: .8rem; line-height: 1.4; }
.notif-time { font-size: .72rem; color: var(--bs-secondary-color); margin-top: .15rem; }

/* ════════════════════════════
   CONTENT
════════════════════════════ */
#main-content {
    margin-left: var(--sidebar-w);
    margin-top: var(--topbar-h);
    padding: 1.5rem;
    min-height: calc(100vh - var(--topbar-h));
    transition: margin-left .25s ease;
}

#main-content.sidebar-collapsed { margin-left: 70px; }

/* ── Mobile ── */
.sb-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.45);
    z-index: 1039;
}

@media (max-width: 991px) {
    #sidebar { transform: translateX(-100%); }
    #sidebar.mobile-open { transform: translateX(0); width: var(--sidebar-w); }
    #topbar { left: 0 !important; }
    #main-content { margin-left: 0 !important; }
}