:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-hover: #30363d;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --border-color: #30363d;
    --accent-primary: #58a6ff;
    --accent-hover: #79c0ff;
    --success: #3fb950;
    --danger: #f85149;
    --warning: #d29922;
    --info: #58a6ff;
    --shadow: rgba(0, 0, 0, 0.3);
}

* {
    transition: background-color 0.2s, color 0.2s, border-color 0.2s;
}

body {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    min-height: 100vh;
}

.page {
    min-height: 100vh;
}

/* Navbar */
.navbar {
    background: var(--bg-secondary) !important;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 8px var(--shadow);
}

.navbar-brand {
    font-weight: 600;
    color: var(--text-primary) !important;
}

.navbar-nav .nav-link {
    color: var(--text-secondary) !important;
    transition: all 0.2s;
}

.navbar-nav .nav-link:hover {
    color: var(--accent-primary) !important;
    transform: translateY(-1px);
}

.navbar-text {
    color: var(--text-secondary) !important;
}

/* Cards */
.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px var(--shadow);
    transition: all 0.3s ease;
    color: var(--text-primary);
    border-radius: 8px;
    overflow: hidden;
}

.card:hover {
    box-shadow: 0 8px 24px rgba(88, 166, 255, 0.2);
    transform: translateY(-4px);
    border-color: var(--accent-primary);
}

.card-header {
    background: var(--bg-tertiary) !important;
    border-bottom: 1px solid var(--border-color) !important;
    font-weight: 600;
    color: var(--text-primary) !important;
}

.card-body {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* Forms */
.form-control, .form-select {
    background: var(--bg-tertiary);
    border: 1.5px solid var(--border-color);
    color: var(--text-primary);
    transition: all 0.2s;
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
}

.form-control:focus, .form-select:focus {
    background: var(--bg-tertiary);
    border-color: var(--accent-primary);
    color: var(--text-primary);
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.15);
    outline: none;
}

.form-control:hover, .form-select:hover {
    border-color: var(--accent-primary);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-label {
    color: var(--text-primary);
    font-weight: 500;
}

.form-text {
    color: var(--text-secondary) !important;
}

/* Buttons - Modern Style */
.btn {
    border-radius: 6px;
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn:before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover:before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary) 0%, #1f6feb 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(88, 166, 255, 0.2);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-hover) 0%, #2f81f7 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(88, 166, 255, 0.4);
    color: white;
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(88, 166, 255, 0.2);
}

.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, #2ea043 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(63, 185, 80, 0.2);
}

.btn-success:hover {
    background: linear-gradient(135deg, #4ec26b 0%, #3fb950 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(63, 185, 80, 0.4);
    color: white;
}

.btn-success:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(63, 185, 80, 0.2);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #da3633 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(248, 81, 73, 0.2);
}

.btn-danger:hover {
    background: linear-gradient(135deg, #ff6b6b 0%, #f85149 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(248, 81, 73, 0.4);
    color: white;
}

.btn-danger:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(248, 81, 73, 0.2);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning) 0%, #bb8009 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(210, 153, 34, 0.2);
}

.btn-warning:hover {
    background: linear-gradient(135deg, #e3b341 0%, #d29922 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(210, 153, 34, 0.4);
    color: white;
}

.btn-secondary {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(88, 166, 255, 0.2);
}

.btn-secondary:active {
    transform: translateY(0);
}

.btn-outline-primary {
    background: transparent;
    border: 1.5px solid var(--accent-primary);
    color: var(--accent-primary);
}

.btn-outline-primary:hover {
    background: var(--accent-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(88, 166, 255, 0.3);
}

.btn-outline-success {
    background: transparent;
    border: 1.5px solid var(--success);
    color: var(--success);
}

.btn-outline-success:hover {
    background: var(--success);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(63, 185, 80, 0.3);
}

.btn-outline-danger {
    background: transparent;
    border: 1.5px solid var(--danger);
    color: var(--danger);
}

.btn-outline-danger:hover {
    background: var(--danger);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(248, 81, 73, 0.3);
}

.btn-outline-warning {
    background: transparent;
    border: 1.5px solid var(--warning);
    color: var(--warning);
}

.btn-outline-warning:hover {
    background: var(--warning);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(210, 153, 34, 0.3);
}

.btn-outline-secondary {
    background: transparent;
    border: 1.5px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-2px);
}

.btn-outline-light {
    border: 1.5px solid var(--border-color);
    color: var(--text-primary);
    background: transparent;
}

.btn-outline-light:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-2px);
}

/* Button Sizes */
.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
    border-radius: 4px;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1.125rem;
    border-radius: 8px;
}

/* Button Groups */
.btn-group {
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.btn-group .btn {
    border-radius: 0;
    margin: 0;
}

.btn-group .btn:first-child {
    border-top-left-radius: 6px;
    border-bottom-left-radius: 6px;
}

.btn-group .btn:last-child {
    border-top-right-radius: 6px;
    border-bottom-right-radius: 6px;
}

.btn-group-vertical {
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.btn-group-vertical .btn {
    border-radius: 0;
    margin: 0;
    width: 100%;
}

.btn-group-vertical .btn:first-child {
    border-top-left-radius: 6px;
    border-top-right-radius: 6px;
}

.btn-group-vertical .btn:last-child {
    border-bottom-left-radius: 6px;
    border-bottom-right-radius: 6px;
}

/* Disabled Buttons */
.btn:disabled,
.btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.btn:disabled:hover,
.btn.disabled:hover {
    transform: none !important;
    box-shadow: none !important;
}

/* Modals */
.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
    color: var(--text-primary);
    border-radius: 12px;
    overflow: hidden;
}

.modal-dialog {
    margin: 1.75rem auto;
}

.modal-lg .modal-content {
    border-radius: 12px;
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-tertiary);
}

.modal-title {
    color: var(--text-primary);
}

.modal-body {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.modal-footer {
    border-top: 1px solid var(--border-color);
    background: var(--bg-tertiary);
}

.btn-close {
    filter: invert(1);
}

/* Tabs */
.nav-tabs {
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 1rem;
}

.nav-tabs .nav-link {
    color: var(--text-secondary);
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
    padding: 0.75rem 1.25rem;
    border-radius: 6px 6px 0 0;
    margin-right: 0.25rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-tabs .nav-link:hover {
    color: var(--accent-primary);
    border-bottom-color: var(--accent-primary);
    background: var(--bg-tertiary);
}

.nav-tabs .nav-link.active {
    color: var(--accent-primary);
    background: var(--bg-tertiary);
    border-bottom: 3px solid var(--accent-primary);
    font-weight: 600;
}

.tab-content {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 0.375rem;
    margin-top: 1rem;
}

/* Badges */
.badge {
    font-size: 0.75rem;
    padding: 0.4em 0.7em;
    font-weight: 600;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.bg-success {
    background: var(--success) !important;
}

.bg-danger {
    background: var(--danger) !important;
}

.bg-primary {
    background: var(--accent-primary) !important;
}

.bg-info {
    background: var(--info) !important;
}

.bg-secondary {
    background: var(--bg-tertiary) !important;
    color: var(--text-primary) !important;
}

/* Alerts */
.alert {
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.alert-danger {
    background: rgba(248, 81, 73, 0.1);
    border-color: var(--danger);
    color: var(--danger);
}

.alert-info {
    background: rgba(88, 166, 255, 0.1);
    border-color: var(--info);
    color: var(--info);
}

.alert-success {
    background: rgba(63, 185, 80, 0.1);
    border-color: var(--success);
    color: var(--success);
}

/* Input Groups */
.input-group-text {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

/* Borders */
.border {
    border-color: var(--border-color) !important;
}

.border-rounded {
    border-color: var(--border-color) !important;
}

/* Text Colors */
.text-muted {
    color: var(--text-muted) !important;
}

.text-danger {
    color: var(--danger) !important;
}

.text-success {
    color: var(--success) !important;
}

.text-primary {
    color: var(--text-primary) !important;
}

.text-secondary {
    color: var(--text-secondary) !important;
}

/* Background Colors */
.bg-light {
    background: var(--bg-tertiary) !important;
    border: 1px solid var(--border-color);
}

.bg-dark {
    background: var(--bg-secondary) !important;
}

/* Charts */
#heartbeatChart, #ramChart {
    max-height: 300px;
    background: var(--bg-tertiary);
    border-radius: 0.375rem;
    padding: 1rem;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-hover);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

/* Select/Dropdown - Fix duplicate arrows */
select.form-select {
    appearance: none !important;
    -webkit-appearance: none !important;
    -moz-appearance: none !important;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23c9d1d9' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e") !important;
    background-repeat: no-repeat !important;
    background-position: right 0.75rem center !important;
    background-size: 16px 12px !important;
    padding-right: 2.5rem !important;
}

select.form-select::-ms-expand {
    display: none !important;
}

/* Remove any additional pseudo-elements that might create duplicate arrows */
select.form-select::before,
select.form-select::after {
    display: none !important;
}

/* Code */
code {
    background: var(--bg-tertiary);
    color: var(--accent-primary);
    padding: 0.2em 0.4em;
    border-radius: 0.25rem;
    font-size: 0.875em;
}

/* Links */
a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--accent-hover);
}

/* Login/Register Pages */
#loginPage, #registerPage {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

#loginPage .card, #registerPage .card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeIn 0.3s ease-out;
}

/* Custom Scrollbar for Select */
select.form-select option {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Dark Tables */
.table-dark {
    --bs-table-bg: var(--bg-tertiary);
    --bs-table-color: var(--text-primary);
    --bs-table-border-color: var(--border-color);
    --bs-table-hover-bg: var(--bg-hover);
    --bs-table-hover-color: var(--text-primary);
    --bs-table-striped-bg: rgba(255, 255, 255, 0.05);
    --bs-table-striped-color: var(--text-primary);
    --bs-table-active-bg: var(--bg-hover);
    --bs-table-active-color: var(--text-primary);
}

.table-dark thead th {
    border-bottom-color: var(--border-color);
    color: var(--text-primary);
    font-weight: 600;
}

.table-dark tbody tr {
    border-color: var(--border-color);
}

.table-dark tbody tr:hover {
    background-color: var(--bg-hover);
}

/* Spoiler Text */
.spoiler-text {
    position: relative;
}

.spoiler-hidden {
    font-family: monospace;
    letter-spacing: 0.1em;
    color: var(--text-muted);
}

.spoiler-visible code {
    background: var(--bg-tertiary);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    color: var(--accent-primary);
    font-family: 'Courier New', monospace;
}

/* Input Groups */
.input-group {
    border-radius: 6px;
    overflow: hidden;
}

.input-group .form-control,
.input-group .form-select {
    border-radius: 0;
}

.input-group .form-control:first-child,
.input-group .form-select:first-child {
    border-top-left-radius: 6px;
    border-bottom-left-radius: 6px;
}

.input-group .form-control:last-child,
.input-group .form-select:last-child {
    border-top-right-radius: 6px;
    border-bottom-right-radius: 6px;
}

.input-group .btn {
    border-radius: 0;
}

.input-group .btn:first-child {
    border-top-left-radius: 6px;
    border-bottom-left-radius: 6px;
}

.input-group .btn:last-child {
    border-top-right-radius: 6px;
    border-bottom-right-radius: 6px;
}

/* Loading Spinner */
.spinner-border {
    width: 1rem;
    height: 1rem;
    border-width: 0.15em;
}

.spinner-border-sm {
    width: 0.875rem;
    height: 0.875rem;
    border-width: 0.125em;
}

/* Improved Table Styling */
.table {
    border-radius: 8px;
    overflow: hidden;
}

.table-responsive {
    border-radius: 8px;
}

/* Card Actions */
.card-body .btn-group,
.card-body .btn-group-vertical {
    margin-top: 0.5rem;
}

/* Icon Spacing in Buttons */
.btn i {
    font-size: 1em;
    line-height: 1;
}

.btn-sm i {
    font-size: 0.875em;
}

.btn-lg i {
    font-size: 1.25em;
}

/* Utility Classes */
.w-100 {
    width: 100% !important;
}

.d-flex {
    display: flex !important;
}

.justify-content-between {
    justify-content: space-between !important;
}

.align-items-center {
    align-items: center !important;
}

.gap-2 {
    gap: 0.5rem !important;
}

.gap-3 {
    gap: 1rem !important;
}

.mb-0 {
    margin-bottom: 0 !important;
}

.mb-2 {
    margin-bottom: 0.5rem !important;
}

.mb-3 {
    margin-bottom: 1rem !important;
}

.mb-4 {
    margin-bottom: 1.5rem !important;
}

.mt-2 {
    margin-top: 0.5rem !important;
}

.mt-3 {
    margin-top: 1rem !important;
}

.mt-4 {
    margin-top: 1.5rem !important;
}

/* Action Buttons Container */
.action-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

/* Server Card Buttons */
.card .btn-group {
    margin-top: 0.75rem;
}

.card .btn-group .btn {
    flex: 1;
}

/* Improved Modal Footer */
.modal-footer {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
    padding: 1rem 1.5rem;
}

.modal-footer .btn {
    min-width: 100px;
}

/* Better Form Layout */
.form-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.form-row .form-group {
    flex: 1;
}

/* Improved Card Header */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
}

.card-header h5,
.card-header h6 {
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Status Badges */
.badge.bg-success,
.badge.bg-danger,
.badge.bg-primary,
.badge.bg-info {
    padding: 0.4em 0.8em;
    font-weight: 600;
}

/* Improved Navbar */
.navbar-nav .nav-link {
    padding: 0.5rem 1rem;
    border-radius: 6px;
    margin: 0 0.25rem;
    transition: all 0.2s;
}

.navbar-nav .nav-link:hover {
    background: var(--bg-tertiary);
}

.navbar-nav .nav-link.active {
    background: var(--bg-tertiary);
    color: var(--accent-primary) !important;
}

/* Better Table Actions */
.table .btn-sm {
    padding: 0.25rem 0.5rem;
    margin: 0 0.125rem;
}

/* Improved Input Groups */
.input-group-text {
    border-radius: 0;
    background: var(--bg-tertiary);
    border: 1.5px solid var(--border-color);
    color: var(--text-primary);
}

.input-group .form-control:first-child + .input-group-text {
    border-left: none;
}

.input-group-text + .form-control {
    border-left: none;
}

/* Loading States */
.btn.loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 1rem;
    height: 1rem;
    top: 50%;
    left: 50%;
    margin-left: -0.5rem;
    margin-top: -0.5rem;
    border: 2px solid currentColor;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spinner 0.6s linear infinite;
}

@keyframes spinner {
    to {
        transform: rotate(360deg);
    }
}