:root {
    --primary-color: #4338ca; /* Darker indigo for better contrast (Indigo-700) */
    --primary-hover: #3730a3; /* Even darker for hover (Indigo-800) */
    --bg-color: #f8fafc;
    --text-main: #0f172a;
    --text-muted: #475569; /* Darkened from #64748b to meet contrast requirements */
    --card-bg: #ffffff;
    --nav-bg: #1e1b4b; /* Deep rich purple/navy for navbar */
    --border-color: #e2e8f0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding-bottom: env(safe-area-inset-bottom);
}

/* Global Links Contrast Fix */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}
a:hover {
    color: var(--primary-hover);
    text-decoration: none;
}

/* Animated Navbar Toggler */
.navbar-toggler {
    padding: 10px 10px;
    border: 1px solid rgba(255, 255, 255, 0.5) !important; /* Красивая окантовка */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px; /* Расстояние между палочками */
    width: 45px;
    height: 38px;
    position: relative;
    transition: all .3s ease-in-out;
}

.navbar-toggler .toggler-icon {
    display: block;
    height: 3px; /* Делаем палочки жирнее */
    width: 24px;
    background: #ffffff;
    border-radius: 2px;
    transition: all .25s ease-in-out;
    position: absolute;
}

/* Позиционирование палочек в обычном состоянии */
.navbar-toggler .top-bar { transform: translateY(-8px); }
.navbar-toggler .middle-bar { opacity: 1; transform: translateX(0); }
.navbar-toggler .bottom-bar { transform: translateY(8px); }

/* Анимация в состояние "X" */
.navbar-toggler:not(.collapsed) .top-bar {
    transform: translateY(0) rotate(45deg);
}

.navbar-toggler:not(.collapsed) .middle-bar {
    opacity: 0;
    transform: translateX(-10px);
}

.navbar-toggler:not(.collapsed) .bottom-bar {
    transform: translateY(0) rotate(-45deg);
}

/* Navbar */
.navbar {
    background-color: var(--nav-bg) !important;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    padding-top: 1rem;
    padding-bottom: 1rem;
}
.navbar-brand {
    font-weight: 700;
    letter-spacing: -0.5px;
    font-size: 1.5rem;
    color: #ffffff !important;
}
.navbar-nav .nav-link {
    color: #cbd5e1 !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    margin: 0 0.25rem;
    border-radius: 8px;
    border-bottom: none !important;
    transition: all 0.2s ease;
}
.navbar-nav .nav-link:hover {
    color: #ffffff !important;
    background-color: rgba(255, 255, 255, 0.1);
}
.navbar-nav .active-nav-link {
    color: #ffffff !important;
    background-color: rgba(255, 255, 255, 0.15);
}

/* Cards */
.card {
    border: 1px solid var(--border-color);
    border-radius: 16px;
    background-color: var(--card-bg);
    box-shadow: 0 1px 3px 0 rgba(0,0,0,0.1), 0 1px 2px -1px rgba(0,0,0,0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    overflow: hidden; /* for card header/footer rounded corners */
}
.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.05);
}
.card-header {
    background-color: rgba(248, 250, 252, 0.5);
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem 1.5rem;
    font-weight: 600;
}
.card-body {
    padding: 1.5rem;
}
.card-footer {
    background-color: rgba(248, 250, 252, 0.5);
    border-top: 1px solid var(--border-color);
    padding: 1.25rem 1.5rem;
}

/* Buttons */
.btn {
    font-weight: 500;
    border-radius: 8px;
    padding: 0.5rem 1rem;
    transition: all 0.2s;
    letter-spacing: 0.01em;
}
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: #ffffff;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}
.btn-primary:hover, .btn-primary:focus, .btn-primary:active {
    background-color: var(--primary-hover) !important;
    border-color: var(--primary-hover) !important;
    color: #ffffff !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.25), 0 2px 4px -2px rgba(79, 70, 229, 0.25) !important;
}
.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}
.btn-outline-primary:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: #ffffff;
}
.btn-success {
    background-color: #10b981;
    border-color: #10b981;
    color: #ffffff;
}
.btn-success:hover, .btn-success:focus {
    background-color: #059669 !important;
    border-color: #059669 !important;
    color: #ffffff !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(16, 185, 129, 0.25) !important;
}

/* Forms */
.form-control, .form-select {
    border-radius: 8px;
    border: 1px solid #cbd5e1;
    padding: 0.6rem 1rem;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    background-color: #ffffff;
}
.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.15);
}
.form-label {
    font-weight: 500;
    color: #334155;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}
.input-group-text {
    border-radius: 8px;
    background-color: #f1f5f9;
    border-color: #cbd5e1;
}

/* Headings & Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.025em;
    line-height: 1.3;
}
h2 {
    font-size: 1.875rem;
}
h5.card-title {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

/* Tables */
.table {
    vertical-align: middle;
}
.table thead th {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    border-bottom: 2px solid var(--border-color);
    padding: 1rem;
    background-color: #f8fafc;
}
.table tbody td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}
/* Removed old funky colors for top 3 in table to favor a cleaner look */
.table tbody tr:first-child td,
.table tbody tr:nth-child(2) td,
.table tbody tr:nth-child(3) td {
    background-color: transparent;
}
.table-hover tbody tr:hover {
    background-color: #f1f5f9;
}

/* Utilities */
.text-muted {
    color: var(--text-muted) !important;
}
.badge {
    padding: 0.4em 0.8em;
    border-radius: 6px;
    font-weight: 600;
    letter-spacing: 0.025em;
}

/* Alerts */
.alert {
    border-radius: 12px;
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

/* Accordion */
.accordion-item {
    border: 1px solid var(--border-color);
    border-radius: 12px !important;
    overflow: hidden;
    margin-bottom: 1rem;
}
.accordion-button {
    font-weight: 600;
    color: var(--text-main);
    padding: 1.25rem 1.5rem;
}
.accordion-button:not(.collapsed) {
    background-color: #eef2ff;
    color: var(--primary-color);
    box-shadow: inset 0 -1px 0 rgba(0,0,0,.125);
}
.accordion-button:focus {
    box-shadow: inset 0 -1px 0 rgba(0,0,0,.125), 0 0 0 0.25rem rgba(79, 70, 229, 0.25);
}

/* Text Truncation */
.text-truncate-multiline {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    word-wrap: break-word;
    overflow-wrap: break-word;
}
.text-break-word {
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: break-word;
}

/* Dropdown Animation & Arrow */
@media (min-width: 992px) {
    .dropdown-menu {
        display: block !important;
        visibility: hidden;
        opacity: 0;
        margin-top: 0 !important;
        transition: opacity 0.2s cubic-bezier(0.16, 1, 0.3, 1), margin-top 0.2s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.2s;
        pointer-events: none;
    }
    .dropdown-menu.show {
        visibility: visible;
        opacity: 1;
        margin-top: 8px !important;
        pointer-events: auto;
    }
}

@media (max-width: 991.98px) {
    .dropdown-menu {
        display: block !important;
        max-height: 0;
        padding-top: 0 !important;
        padding-bottom: 0 !important;
        margin-top: 0 !important;
        margin-bottom: 0 !important;
        overflow: hidden;
        opacity: 0;
        border: none !important;
        transition: max-height 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease, padding 0.3s ease, margin 0.3s ease;
    }
    .dropdown-menu.show {
        max-height: 250px;
        padding-top: 0.5rem !important;
        padding-bottom: 0.5rem !important;
        margin-top: 0.5rem !important;
        opacity: 1;
        border: 1px solid var(--border-color) !important;
    }
}

.dropdown-toggle::after {
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    vertical-align: middle;
}
.dropdown-toggle.show::after {
    transform: rotate(180deg);
}
.dropdown-menu.dropdown-menu-end {
    right: 0 !important;
    left: auto !important;
}