/* ═══════════════════════════════════════
   MITXY Admin — Cursor-Style Design
   Light warm ivory, SVG icons, compact
═══════════════════════════════════════ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box
}
/*
:root {
    --canvas: #f7f7f4;
    --card: #ffffff;
    --card-alt: #fafaf8;
    --ink: #262510;
    --muted: #7a7974;
    --deep: #141414;
    --pebble: #e6e5e0;
    --highlight: #cdcdc9;
    --accent: #f54e00;
    --green: #34785c;
    --green-light: #4ade80;
    --gold: #c08532;
    --red: #d63031;
    --border: #e6e5e0;
    --border-focus: #262510;
    --radius: 4px;
    --radius-lg: 8px;
    --gap: 8px;
    --pad: 12px;
    --pad-lg: 16px;
    --font: 'Lato', 'Inter', 'Segoe UI', sans-serif;
    --mono: 'Courier New', 'Berkeley Mono', monospace;
}
*/
:root {
    /* Nền và thẻ */
    --canvas: #f8fafc;
    --card: #ffffff;
    --card-alt: #f1f5f9;
    
    /* Chữ */
    --ink: #0f172a;
    --muted: #64748b;
    --deep: #020617;
    
    /* Border và đường nét */
    --pebble: #e2e8f0;
    --highlight: #cbd5e1;
    --border: #e2e8f0;
    --border-focus: #3b82f6;
    
    /* Màu nhấn (Brand & Status) */
    --accent: #3b82f6;
    --green: #10b981;
    --green-light: #34d399;
    --gold: #f59e0b;
    --red: #ef4444;
    
    /* Kích thước & Font */
    --radius: 14px;
    --radius-sm: 6px;
    --radius-lg: 8px;
    --gap: 12px;
    --pad: 16px;
    --pad-lg: 20px;
    --font: 'Inter', 'Lato', 'Segoe UI', sans-serif;
    --mono: 'JetBrains Mono', 'Courier New', monospace;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

body {
    font-family: var(--font);
    background: var(--canvas);
    color: var(--ink);
    min-height: 100vh;
    font-size: 14px;
    line-height: 1.5;
    overflow-x: hidden
}

/* ═══ SIDEBAR ═══ */
#sidebar {
    width: 220px;
    background: var(--card);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    overflow-y: auto
}

.brand {
    padding: 16px var(--pad-lg);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: -.3px
}

.brand svg {
    color: var(--accent);
    flex-shrink: 0
}

.nav-group {
    padding: 8px
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 10px;
    border-radius: var(--radius);
    color: var(--muted);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    transition: all .15s;
    cursor: pointer;
    border: 1px solid transparent
}

.nav-item:hover {
    background: var(--card-alt);
    color: var(--ink);
    border-color: var(--pebble)
}

.nav-item.active {
    background: var(--pebble);
    color: var(--ink);
    font-weight: 600
}

.nav-item svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0
}

.nav-bottom {
    margin-top: auto;
    padding: 8px;
    border-top: 1px solid var(--border)
}

.nav-item.logout {
    color: var(--red)
}

.nav-item.logout:hover {
    background: rgba(214, 48, 49, .06)
}

/* ═══ MAIN ═══ */
main {
    margin-left: 220px;
    padding: 24px 28px;
    max-width: 100%
}

.page-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--deep);
    margin-bottom: 20px;
    letter-spacing: -.3px
}

.tab-content {
    display: none
}

.tab-content.active {
    display: block
}

.mt {
    margin-top: 16px
}

/* ═══ SUB-TABS ═══ */
.sub-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 8px
}

.sub-tab {
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    background: var(--card);
    color: var(--muted);
    font-family: var(--font);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all .15s
}

.sub-tab:hover {
    border-color: var(--ink);
    color: var(--ink)
}

.sub-tab.active {
    background: var(--ink);
    color: var(--canvas);
    border-color: var(--ink)
}

.sub-tab svg {
    width: 14px;
    height: 14px
}

.sub-panel {
    display: none
}

.sub-panel.active {
    display: block
}

.result.ok {
    background: rgba(52, 120, 92, .06);
    border: 1px solid rgba(52, 120, 92, .2);
    color: var(--green);
    padding: 10px 14px;
    border-radius: var(--radius);
    font-size: 13px
}

/* ═══ STATS ═══ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--gap)
}

.stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--pad)
}

.stat-card .label {
    font-size: 11px;
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: .5px;
    margin-bottom: 4px
}

.stat-card .value {
    font-size: 28px;
    font-weight: 700;
    color: var(--ink)
}

.stat-card .sub {
    font-size: 11px;
    color: var(--muted);
    margin-top: 2px
}

/* ═══ CARD ═══ */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--pad);
    box-shadow: 0 4px 12px rgba(0, 0, 0, .02);
    transition: box-shadow .2s ease-in-out
}

.card:hover {
    box-shadow: 0 6px 16px rgba(0, 0, 0, .04)
}

.card h3 {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--ink);
    display: flex;
    align-items: center;
    gap: 6px
}

.card h3 svg {
    width: 16px;
    height: 16px;
    color: var(--accent)
}

/* ═══ TOOLBAR ═══ */
.toolbar {
    display: flex;
    gap: var(--gap);
    margin-bottom: 16px;
    flex-wrap: wrap;
    align-items: center
}

.input-search,
.input-select,
.input-lg,
textarea.input-lg {
    padding: 8px 12px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--ink);
    font-size: 13px;
    font-family: var(--font);
    outline: none;
    transition: all .2s ease
}

.input-search:focus,
.input-select:focus,
.input-lg:focus,
textarea.input-lg:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(38, 37, 16, .1)
}

textarea.input-lg {
    resize: vertical;
    font-family: var(--mono);
    font-size: 12px;
    line-height: 1.5
}

.input-search {
    flex: 1;
    min-width: 180px
}

.input-lg {
    width: 100%
}

/* ═══ BUTTONS ═══ */
.btn {
    padding: 8px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all .2s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: var(--font);
    background: var(--card);
    color: var(--ink);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, .02)
}

.btn svg {
    width: 14px;
    height: 14px
}

.btn:hover {
    border-color: var(--ink);
    background: var(--card-alt)
}

.btn-primary {
    background: var(--ink);
    color: var(--canvas);
    border-color: var(--ink);
    box-shadow: 0 2px 4px rgba(38, 37, 16, .15)
}

.btn-primary:hover {
    background: var(--deep);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(38, 37, 16, .2)
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 1px 2px rgba(38, 37, 16, .15)
}

.btn-accent {
    background: transparent;
    color: var(--accent);
    border-color: var(--accent)
}

.btn-accent:hover {
    background: rgba(245, 78, 0, .05)
}

.btn-success {
    background: var(--green);
    color: #fff;
    border-color: var(--green)
}

.btn-success:hover {
    opacity: .9
}

.btn-danger {
    background: transparent;
    color: var(--red);
    border-color: rgba(214, 48, 49, .3)
}

.btn-danger:hover {
    background: rgba(214, 48, 49, .05);
    border-color: var(--red)
}

.btn-sm {
    padding: 4px 10px;
    font-size: 12px
}

.btn-lg {
    padding: 10px 20px;
    font-size: 14px
}

.btn-group {
    display: flex;
    gap: var(--gap);
    margin-top: 16px;
    flex-wrap: wrap
}

/* ═══ TABLE ═══ */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: 8px
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px
}

.data-table th {
    text-align: left;
    font-size: 11px;
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: .5px;
    padding: 8px var(--pad);
    border-bottom: 1px solid var(--border)
}

.data-table td {
    padding: 8px var(--pad);
    font-size: 13px;
    border-bottom: 1px solid var(--pebble);
    vertical-align: middle
}

.data-table tbody tr:hover {
    background: var(--card-alt)
}

.data-table .actions {
    display: flex;
    gap: 4px;
    flex-wrap: wrap
}

.data-table code {
    font-family: var(--mono);
    font-size: 12px;
    font-weight: 600;
    color: var(--accent)
}

/* ═══ BADGES ═══ */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: var(--radius);
    font-size: 11px;
    font-weight: 600;
    border: 1px solid
}

.badge-green {
    background: rgba(52, 120, 92, .08);
    color: var(--green);
    border-color: rgba(52, 120, 92, .2)
}

.badge-red {
    background: rgba(214, 48, 49, .06);
    color: var(--red);
    border-color: rgba(214, 48, 49, .2)
}

.badge-orange {
    background: rgba(192, 133, 50, .08);
    color: var(--gold);
    border-color: rgba(192, 133, 50, .2)
}

.badge-gray {
    background: var(--pebble);
    color: var(--muted);
    border-color: var(--highlight)
}

/* ═══ PROFILE CARD ═══ */
.profile-card {
    max-width: 660px
}

.profile-card .hint {
    color: var(--muted);
    font-size: 13px;
    margin-bottom: 16px;
    line-height: 1.6
}

.form-row {
    display: flex;
    gap: 12px;
    margin-bottom: 12px
}

.form-row .field {
    flex: 1
}

.field label {
    display: block;
    font-size: 11px;
    font-weight: 600;
    color: var(--muted);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: .4px
}

.field small {
    display: block;
    color: var(--muted);
    font-size: 11px;
    margin-top: 2px
}

.result-box {
    margin-top: 12px;
    padding: 12px;
    border-radius: var(--radius);
    font-size: 13px;
    line-height: 1.6;
    border: 1px solid
}

.result-box.success {
    background: rgba(52, 120, 92, .06);
    border-color: rgba(52, 120, 92, .2);
    color: var(--green)
}

.result-box.error {
    background: rgba(214, 48, 49, .06);
    border-color: rgba(214, 48, 49, .2);
    color: var(--red)
}

/* ═══ KEYS CHIPS ═══ */
.keys-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    max-height: 180px;
    overflow-y: auto
}

.key-chip {
    padding: 4px 10px;
    border-radius: var(--radius);
    font-size: 12px;
    font-weight: 600;
    font-family: var(--mono);
    cursor: pointer;
    background: var(--card-alt);
    border: 1px solid var(--border);
    color: var(--ink);
    transition: all .15s
}

.key-chip:hover {
    border-color: var(--ink);
    background: var(--pebble)
}

.key-chip.selected {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(245, 78, 0, .04)
}

/* ═══ INSTANCES ═══ */
.vps-group {
    background: var(--card-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 16px;
    overflow: hidden
}

.vps-group-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: var(--card);
    border-bottom: 1px solid var(--border)
}

.vps-group-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--ink)
}

.instances-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--gap)
}

.instance-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--pad)
}

.instance-card .inst-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px
}

.instance-card .inst-name {
    font-size: 14px;
    font-weight: 700;
    color: var(--ink)
}

.instance-card .inst-info {
    font-size: 12px;
    color: var(--muted);
    margin-bottom: 10px;
    line-height: 1.6
}

.instance-card .inst-info span {
    color: var(--ink);
    font-weight: 500
}

.instance-card .inst-actions {
    display: flex;
    gap: 4px;
    flex-wrap: wrap
}

.instances-mini {
    display: flex;
    gap: 6px;
    flex-wrap: wrap
}

.mini-badge {
    padding: 4px 10px;
    border-radius: var(--radius);
    font-size: 12px;
    font-weight: 500;
    background: var(--card-alt);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 4px
}

.mini-badge .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    display: inline-block
}

.dot-green {
    background: var(--green-light)
}

.dot-red {
    background: var(--red)
}

/* ═══ INSTANCE PICKER (modal) ═══ */
.inst-picker {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden
}

.inst-picker-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 10px;
    background: var(--card-alt);
    border-bottom: 1px solid var(--border);
    gap: 8px
}

.inst-picker-toolbar .pick-actions {
    display: flex;
    gap: 4px
}

.inst-picker-toolbar .pick-actions button {
    font-size: 11px;
    padding: 2px 8px;
    border: 1px solid var(--border);
    border-radius: 3px;
    background: var(--card);
    color: var(--muted);
    cursor: pointer;
    font-family: var(--font);
    font-weight: 600;
    transition: all .15s
}

.inst-picker-toolbar .pick-actions button:hover {
    border-color: var(--ink);
    color: var(--ink)
}

.inst-picker-count {
    font-size: 11px;
    font-weight: 700;
    color: var(--accent);
    min-width: 60px;
    text-align: right
}

.inst-picker-list {
    max-height: 220px;
    overflow-y: auto;
    padding: 4px 0
}

.inst-pick-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 7px 12px;
    cursor: pointer;
    transition: background .12s;
    border-bottom: 1px solid var(--card-alt)
}

.inst-pick-item:last-child {
    border-bottom: none
}

.inst-pick-item:hover {
    background: var(--card-alt)
}

.inst-pick-item.selected {
    background: rgba(52, 120, 92, .05)
}

.inst-pick-item .pick-check {
    width: 18px;
    height: 18px;
    border-radius: 4px;
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all .15s;
    color: transparent
}

.inst-pick-item.selected .pick-check {
    background: var(--green);
    border-color: var(--green);
    color: #fff
}

.inst-pick-item .pick-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--ink);
    flex: 1
}

.inst-pick-item .pick-port {
    font-size: 11px;
    color: var(--muted);
    font-family: var(--mono);
    background: var(--card-alt);
    padding: 1px 6px;
    border-radius: 3px
}

.inst-pick-item .pick-vps {
    font-size: 10px;
    color: var(--muted);
    background: var(--card-alt);
    padding: 1px 6px;
    border-radius: 3px;
    border: 1px solid var(--border);
    margin-left: auto
}

.inst-pick-empty {
    padding: 16px;
    text-align: center;
    color: var(--red);
    font-size: 13px
}

/* ═══ MODAL ═══ */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(38, 37, 16, .3);
    z-index: 1000;
    align-items: center;
    justify-content: center
}

.modal-overlay.show {
    display: flex
}

.modal {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    min-width: 380px;
    max-width: 480px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, .12)
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px
}

.modal-header h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--ink)
}

.modal-close {
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--muted);
    transition: all .15s
}

.modal-close:hover {
    border-color: var(--ink);
    color: var(--ink)
}

.modal-close svg {
    width: 14px;
    height: 14px
}

#modal-body .field {
    margin-bottom: 12px
}

/* ═══ TOAST ═══ */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 10px 18px;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 600;
    z-index: 2000;
    transform: translateY(80px);
    opacity: 0;
    transition: all .3s;
    pointer-events: none;
    border: 1px solid
}

.toast.show {
    transform: translateY(0);
    opacity: 1
}

.toast.success {
    background: #f0fdf4;
    color: var(--green);
    border-color: rgba(52, 120, 92, .2)
}

.toast.error {
    background: #fef2f2;
    color: var(--red);
    border-color: rgba(214, 48, 49, .2)
}

.toast.info {
    background: var(--card);
    color: var(--ink);
    border-color: var(--border)
}

/* ═══ SCROLLBAR ═══ */
::-webkit-scrollbar {
    width: 4px
}

::-webkit-scrollbar-track {
    background: transparent
}

::-webkit-scrollbar-thumb {
    background: var(--highlight);
    border-radius: 2px
}

/* ═══ RESPONSIVE ═══ */
@media(max-width:768px) {
    #sidebar {
        width: 52px;
        overflow: hidden
    }

    .brand span,
    .nav-item span:last-child {
        display: none
    }

    .nav-item {
        justify-content: center;
        padding: 8px
    }

    main {
        margin-left: 52px;
        padding: 16px;
        max-width: 100%;
        overflow-x: hidden
    }

    .form-row {
        flex-direction: column
    }

    .instances-grid {
        grid-template-columns: 1fr
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr
    }
}

@media(max-width:480px) {
    .stats-grid {
        grid-template-columns: 1fr
    }
}

/* ═══ POPUP NOTIFICATION ═══ */
.popup-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(10, 14, 23, 0.6);
    backdrop-filter: blur(4px);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.popup-overlay.show {
    display: flex;
    animation: fadeIn 0.3s ease-out;
}
.popup-box {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
    position: relative;
    overflow: hidden;
    animation: slideUp 0.3s ease-out;
}
.popup-header {
    background: var(--card-alt);
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.popup-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--ink);
    display: flex;
    align-items: center;
    gap: 8px;
}
.popup-close {
    background: transparent;
    border: none;
    color: var(--muted);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s;
}
.popup-close:hover {
    color: var(--red);
}
.popup-close svg {
    width: 18px;
    height: 18px;
}
.popup-content {
    padding: 20px;
    font-size: 14px;
    line-height: 1.6;
    color: var(--ink);
    max-height: 70vh;
    overflow-y: auto;
}
.popup-content h1, .popup-content h2, .popup-content h3 {
    margin-bottom: 12px;
    color: var(--ink);
}
.popup-content p {
    margin-bottom: 12px;
}
.popup-content p:last-child {
    margin-bottom: 0;
}
.popup-content a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
}
.popup-content a:hover {
    text-decoration: underline;
}
.popup-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    display: inline-block;
    vertical-align: middle;
}
/* Style for inline icons/gifs */
.popup-content p img {
    max-height: 24px;
    margin: 0 4px;
    vertical-align: text-bottom;
}
.popup-footer {
    padding: 14px 20px;
    background: var(--card-alt);
    border-top: 1px solid var(--border);
    text-align: right;
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}