/**
 * Sidebar Navigation - CS2 Project
 * Боковая навигация с возможностью сворачивания
 */

/* ===== CSS Variables ===== */
:root {
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 68px;
    --sidebar-bg: rgb(14 15 18);
    --sidebar-border: rgba(255, 255, 255, 0.04);
    --sidebar-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Body with sidebar ===== */

/* Hide top navigation bar — sidebar replaces it */
body.has-sidebar .header-nav {
    display: none !important;
}

/* Header and page-wrapper: sidebar offset left, right mirrors when space allows */
body.has-sidebar .header {
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: clamp(0px, calc(100vw - var(--sidebar-width) - 1400px), var(--sidebar-width));
    transition: left var(--sidebar-transition), right var(--sidebar-transition);
}

body.sidebar-collapsed .header {
    left: var(--sidebar-collapsed-width);
    right: clamp(0px, calc(100vw - var(--sidebar-collapsed-width) - 1400px), var(--sidebar-collapsed-width));
}

body.has-sidebar .page-wrapper {
    padding-top: 62px;
    margin-left: var(--sidebar-width);
    margin-right: clamp(0px, calc(100vw - var(--sidebar-width) - 1400px), var(--sidebar-width));
    transition: margin-left var(--sidebar-transition), margin-right var(--sidebar-transition);
}

body.sidebar-collapsed .page-wrapper {
    margin-left: var(--sidebar-collapsed-width);
    margin-right: clamp(0px, calc(100vw - var(--sidebar-collapsed-width) - 1400px), var(--sidebar-collapsed-width));
}

/* Header-top: constrained to container width, centered, rounded */
body.has-sidebar .header-top {
    width: 100%;
    max-width: calc(1400px - 3rem);
    margin: 0 auto;
    border-radius: 0 0 16px 16px;
}

/* Gradient line fades to zero at edges */
body.has-sidebar .header-top::after {
    background: linear-gradient(90deg, transparent 0%, var(--accent-orange) 15%, var(--accent-yellow) 50%, var(--accent-orange) 85%, transparent 100%);
    border-radius: 0 0 16px 16px;
}

/* ===== Sidebar ===== */
.sidebar-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    transition: width var(--sidebar-transition);
    overflow: hidden;
}

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

/* ===== Sidebar Header ===== */
.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 0.75rem;
    height: 62px;
    min-height: 62px;
    border-bottom: 1px solid var(--sidebar-border);
    position: relative;
}

.sidebar-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-orange) 0%, var(--accent-yellow) 50%, var(--accent-orange) 100%);
}

.sidebar-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.85rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--accent-orange);
    white-space: nowrap;
    overflow: hidden;
    transition: opacity 0.2s ease, width 0.2s ease;
}

body.sidebar-collapsed .sidebar-title {
    opacity: 0;
    width: 0;
    pointer-events: none;
}

/* ===== Collapse Toggle Button ===== */
.sidebar-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.sidebar-toggle:hover {
    background: rgba(255, 85, 0, 0.1);
    color: var(--accent-orange);
}

.sidebar-toggle .sp-i {
    width: 16px;
    height: 16px;
    transition: transform var(--sidebar-transition);
}

body.sidebar-collapsed .sidebar-toggle .sp-i {
    transform: rotate(180deg);
}

body.sidebar-collapsed .sidebar-toggle {
    margin: 0 auto;
}

/* ===== Navigation Label ===== */
.sidebar-label {
    padding: 1.25rem 1rem 0.5rem;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    transition: opacity 0.2s ease;
}

body.sidebar-collapsed .sidebar-label {
    opacity: 0;
    height: 0;
    padding: 0;
    overflow: hidden;
}

/* ===== Sidebar Menu List ===== */
.sidebar-menu {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0.5rem;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 85, 0, 0.2) transparent;
}

.sidebar-menu::-webkit-scrollbar {
    width: 4px;
}

.sidebar-menu::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-menu::-webkit-scrollbar-thumb {
    background: rgba(255, 85, 0, 0.2);
    border-radius: 4px;
}

/* ===== Menu Item ===== */
.sidebar-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 0.75rem;
    margin-bottom: 2px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 10px;
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.3px;
    transition: all 0.2s ease;
    white-space: nowrap;
    overflow: hidden;
    position: relative;
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}

.sidebar-item:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.04);
    text-shadow: none;
}

.sidebar-item.active {
    color: var(--accent-orange);
    background: rgba(255, 85, 0, 0.1);
}

.sidebar-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background: var(--gradient-orange);
    border-radius: 0 3px 3px 0;
}

/* Icon wrapper */
.sidebar-item-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    flex-shrink: 0;
    font-size: 1.2rem;
}

.sidebar-item-icon .sp-i,
.sidebar-item-icon .menu-svg-icon {
    width: 20px;
    height: 20px;
}

.sidebar-item-icon i {
    font-size: 1.2rem;
}

/* Text */
.sidebar-item-text {
    transition: opacity 0.2s ease, transform 0.2s ease;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

body.sidebar-collapsed .sidebar-item-text {
    opacity: 0;
    transform: translateX(-10px);
    pointer-events: none;
    width: 0;
}

body.sidebar-collapsed .sidebar-item {
    justify-content: center;
    align-items: center;
    padding: 0;
    width: 44px;
    height: 44px;
    margin: 2px auto;
    border-radius: 10px;
    gap: 0;
}

body.sidebar-collapsed .sidebar-item-icon {
    margin: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===== Dropdown inside sidebar ===== */
.sidebar-dropdown {}

.sidebar-dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 0.75rem;
    margin-bottom: 2px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 10px;
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.3px;
    transition: all 0.2s ease;
    white-space: nowrap;
    overflow: hidden;
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    position: relative;
}

.sidebar-dropdown-toggle:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.04);
}

.sidebar-dropdown-toggle.active {
    color: var(--accent-orange);
    background: rgba(255, 85, 0, 0.1);
}

body.sidebar-collapsed .sidebar-dropdown-toggle {
    justify-content: center;
    align-items: center;
    padding: 0;
    width: 44px;
    height: 44px;
    margin: 2px auto;
    border-radius: 10px;
    gap: 0;
}

body.sidebar-collapsed .sidebar-dropdown-toggle .sidebar-item-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

body.sidebar-collapsed .sidebar-dropdown-toggle .sidebar-item-text {
    opacity: 0;
    width: 0;
    pointer-events: none;
}

.sidebar-dropdown-arrow {
    width: 16px;
    height: 16px;
    margin-left: auto;
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.sidebar-dropdown.open .sidebar-dropdown-arrow {
    transform: rotate(180deg);
}

body.sidebar-collapsed .sidebar-dropdown-arrow {
    display: none;
}

.sidebar-dropdown-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.25s ease;
    padding-left: 0.5rem;
    opacity: 0;
}

.sidebar-dropdown-menu .sidebar-item {
    font-size: 0.8125rem;
    padding: 0.5rem 0.75rem 0.5rem 1.75rem;
    color: var(--text-muted);
}

.sidebar-dropdown-menu .sidebar-item:hover {
    color: var(--text-secondary);
}

.sidebar-dropdown-menu .sidebar-item.active {
    color: var(--accent-orange);
}

body.sidebar-collapsed .sidebar-dropdown-menu {
    display: none;
}

/* ===== Collapsed Floating Submenu ===== */
.sidebar-flyout {
    position: fixed;
    min-width: 180px;
    background: linear-gradient(135deg, var(--card-bg) 0%, rgb(21 21 24) 100%);
    border: none;
    border-radius: 12px;
    box-shadow: none;
    z-index: 10001;
    padding: 0.4rem;
    opacity: 0;
    transform: translateX(-6px);
    transition: opacity 0.15s ease, transform 0.15s ease;
    pointer-events: none;
}

.sidebar-flyout.visible {
    opacity: 1;
    transform: translateX(0);
    pointer-events: auto;
}

.sidebar-flyout-title {
    padding: 0.5rem 0.75rem 0.35rem;
    font-family: var(--font-heading);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
}

.sidebar-flyout .sidebar-flyout-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.55rem 0.75rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    font-size: 0.8125rem;
    font-weight: 500;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.sidebar-flyout .sidebar-flyout-item:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.04);
}

.sidebar-flyout .sidebar-flyout-item.active {
    color: var(--accent-orange);
    background: rgba(255, 85, 0, 0.08);
}

.sidebar-flyout .sidebar-flyout-item .sidebar-item-icon {
    width: 18px;
    height: 18px;
}

.sidebar-flyout .sidebar-flyout-item .sidebar-item-icon .sp-i,
.sidebar-flyout .sidebar-flyout-item .sidebar-item-icon .menu-svg-icon {
    width: 16px;
    height: 16px;
}

/* ===== Sidebar Footer ===== */
.sidebar-footer {
    padding: 0.75rem;
    border-top: 1px solid var(--sidebar-border);
}

.sidebar-footer .sidebar-item {
    margin-bottom: 0;
}

/* ===== Mobile Sidebar ===== */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 10000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

/* Mobile: sidebar is off-canvas */
@media (max-width: 1024px) {
    .sidebar-nav {
        transform: translateX(-100%);
        width: var(--sidebar-width) !important;
        box-shadow: 4px 0 30px rgba(0,0,0,0.5);
    }

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

    .sidebar-overlay {
        display: block;
    }

    body.sidebar-collapsed .sidebar-nav {
        width: var(--sidebar-width) !important;
    }

    /* On mobile, show the mobile menu button */
    body.has-sidebar .mobile-menu-btn {
        display: flex;
    }

    /* Reset margins on mobile */
    body.has-sidebar .header {
        position: fixed;
        left: 0;
        right: 0;
        margin-left: 0;
        margin-right: 0;
    }

    body.has-sidebar .page-wrapper {
        padding-top: 62px;
        margin-left: 0;
        margin-right: 0;
    }

    body.has-sidebar .header-top {
        max-width: none;
        margin: 0;
        border-radius: 0;
    }

    body.has-sidebar .header-top::after {
        border-radius: 0;
    }
}

/* ===== Large screens ===== */
@media (min-width: 1025px) {
    /* Hide mobile menu button when sidebar is active */
    body.has-sidebar .mobile-menu-btn {
        display: none;
    }
}