/* ============================================================
   navigation.css — Ykien / Denso Nav
   Desktop : fixed left sidebar
   Mobile  : top bar + hamburger dropdown
   ============================================================ */

:root {
    --nav-primary:    #dd002c;
    --nav-hover:      #b30024;
    --nav-bg:         #ffffff;
    --nav-surface:    #f5f5f7;
    --nav-border:     rgba(0, 0, 0, 0.08);
    --nav-text:       #2c2c2c;
    --nav-text-dim:   #9a9aaa;
    --nav-active-bg:  rgba(221, 0, 44, 0.08);
    --nav-active-fg:  #dd002c;
    --nav-width:      330px;
    --nav-mobile-h:   60px;
    --nav-radius:     10px;
    --nav-transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset ──────────────────────────────────────────────── */
.yk-sidebar *,
.yk-sidebar *::before,
.yk-sidebar *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* ================================================================
   DESKTOP SIDEBAR
   ================================================================ */
.yk-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--nav-width);
    height: 100vh;
    background: var(--nav-bg);
    border-right: 1px solid var(--nav-border);
    box-shadow: 2px 0 16px rgba(0,0,0,0.06);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    font-family: 'DM Sans', 'Segoe UI', sans-serif;
    overflow: hidden;
}

/* ── Logo area ───────────────────────────────────────────── */
.yk-sidebar__logo {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px 20px 24px;
    border-bottom: 1px solid var(--nav-border);
    flex-shrink: 0;
}

.yk-sidebar__logo img {
    width: 120px;
    height: auto;
    object-fit: contain;
    opacity: 0.92;
    transition: opacity var(--nav-transition);
}

.yk-sidebar__logo img:hover { opacity: 1; }

/* ── Nav list ────────────────────────────────────────────── */
.yk-sidebar__nav {
    flex: 1;
    overflow-y: auto;
    padding: 16px 12px;
    scrollbar-width: none;
}
.yk-sidebar__nav::-webkit-scrollbar { display: none; }

.yk-sidebar__section-label {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--nav-text-dim);
    padding: 8px 12px 6px;
    margin-top: 8px;
}

.yk-sidebar__list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.yk-sidebar__link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 14px;
    border-radius: var(--nav-radius);
    color: var(--nav-text);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: background var(--nav-transition), color var(--nav-transition), transform var(--nav-transition);
    position: relative;
    white-space: nowrap;
    overflow: hidden;
}

.yk-sidebar__link i {
    font-size: 0.95rem;
    width: 18px;
    text-align: center;
    flex-shrink: 0;
    color: var(--nav-text-dim);
    transition: color var(--nav-transition);
}

.yk-sidebar__link:hover {
    background: var(--nav-surface);
    color: var(--nav-primary);
    transform: translateX(2px);
}

.yk-sidebar__link:hover i {
    color: var(--nav-primary);
}

.yk-sidebar__link.active {
    background: var(--nav-active-bg);
    color: var(--nav-active-fg);
}

.yk-sidebar__link.active i {
    color: var(--nav-active-fg);
}

.yk-sidebar__link.active::after {
    content: '';
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--nav-active-fg);
}

/* ── User / Auth footer ──────────────────────────────────── */
.yk-sidebar__footer {
    padding: 16px 12px;
    border-top: 1px solid var(--nav-border);
    flex-shrink: 0;
}


.yk-dash-toolbar__btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 16px !important;
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    line-height: 1;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease, color 0.15s ease;
    width: 100%;
    white-space: nowrap;
}

.yk-sidebar__user {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--nav-radius);
    background: var(--nav-surface);
    margin-bottom: 10px;
}

.yk-sidebar__avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--nav-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
    letter-spacing: 0;
}

.yk-sidebar__username {
    font-size: 0.8rem;
    font-weight: 600;
    color: #2c2c2c;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.yk-sidebar__role {
    font-size: 0.68rem;
    color: var(--nav-text-dim);
}

.yk-sidebar__unread {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 22px;
    height: 20px;
    padding: 0 7px;
    margin-left: auto;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 700;
    line-height: 1;
    background: var(--nav-primary);
    color: #ffffff;
    letter-spacing: 0.01em;
    box-shadow: 0 1px 3px rgba(221, 0, 44, 0.25);
}


.yk-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 9px 14px;
    border-radius: var(--nav-radius);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    border: none;
    transition: background var(--nav-transition), color var(--nav-transition);
    width: 100%;
    font-family: inherit;
}

.yk-btn-logout {
    background: transparent;
    color: var(--nav-primary);
    border: 1px solid rgba(221, 0, 44, 0.35);
}
.yk-btn-logout:hover {
    background: var(--nav-primary);
    color: #fff;
    border-color: var(--nav-primary);
}

.yk-btn-login {
    background: var(--nav-primary);
    color: #fff;
}
.yk-btn-login:hover {
    background: var(--nav-hover);
}

/* body offset so content doesn't hide behind sidebar */
body {
    margin-left: var(--nav-width);
    transition: margin-left var(--nav-transition);
}

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

/* Hidden on desktop */
.yk-mobile-bar { display: none; }
.yk-mobile-backdrop { display: none; }

@media (max-width: 768px) {

    /* Kill desktop sidebar layout */
    body {
        margin-left: 0;
    }

    .yk-sidebar {
        position: fixed;
        top: var(--nav-mobile-h);
        left: 0;
        right: 0;
        width: 100%;
        height: auto;
        max-height: 0;
        overflow: hidden;
        border-right: none;
        border-top: 1px solid var(--nav-border);
        border-bottom: 1px solid var(--nav-border);
        flex-direction: column;
        transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                    opacity 0.25s ease;
        opacity: 0;
        box-shadow: 0 8px 24px rgba(0,0,0,0.10);
    }

    .yk-sidebar::before { display: none; }

    .yk-sidebar.open {
        max-height: 85vh;
        overflow-y: auto;
        opacity: 1;
    }

    /* Hide desktop logo inside sidebar on mobile (shown in topbar instead) */
    .yk-sidebar__logo { display: none; }

    /* Mobile top bar */
    .yk-mobile-bar {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 16px;
        height: var(--nav-mobile-h);
        background: var(--nav-bg);
        border-bottom: 1px solid var(--nav-border);
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1001;
        font-family: 'DM Sans', 'Segoe UI', sans-serif;
    }

    .yk-mobile-bar__logo img {
        height: 30px;
        width: auto;
        object-fit: contain;
        opacity: 0.9;
    }

    /* Hamburger button */
    .yk-hamburger {
        width: 40px;
        height: 40px;
        background: var(--nav-surface);
        border: 1px solid var(--nav-border);
        border-radius: 8px;
        cursor: pointer;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 5px;
        padding: 0;
        transition: background var(--nav-transition);
    }
    .yk-hamburger:hover { background: rgba(221, 0, 44, 0.07); }

    .yk-hamburger__bar {
        display: block;
        width: 18px;
        height: 2px;
        background: var(--nav-primary);
        border-radius: 2px;
        transition: transform 0.3s ease, opacity 0.3s ease, width 0.3s ease;
        transform-origin: center;
    }

    /* Animate to X when open */
    .yk-hamburger.active .yk-hamburger__bar:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    .yk-hamburger.active .yk-hamburger__bar:nth-child(2) {
        opacity: 0;
        width: 0;
    }
    .yk-hamburger.active .yk-hamburger__bar:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    /* Push body content below mobile bar */
    body {
        padding-top: var(--nav-mobile-h);
    }

    /* Nav adjustments inside dropdown */
    .yk-sidebar__nav {
        padding: 10px 12px;
        max-height: calc(85vh - 130px);
        overflow-y: auto;
    }

    .yk-sidebar__footer {
        padding: 12px;
    }

    /* Backdrop */
    .yk-mobile-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        top: var(--nav-mobile-h);
        background: rgba(0,0,0,0.25);
        z-index: 999;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s ease;
    }
    .yk-mobile-backdrop.active {
        opacity: 1;
        pointer-events: all;
    }
}