:root {
    --bg: #f4f6fa;
    --surface: #ffffff;
    --surface-alt: #eef1f7;
    --card: rgba(255, 255, 255, 0.94);
    --border: rgba(15, 23, 42, 0.08);
    --primary: #16a34a;
    --primary-soft: rgba(22, 163, 74, 0.12);
    --success: #0f9d58;
    --danger: #dc2626;
    --warning: #f59e0b;
    --text: #0f172a;
    --muted: #65758b;
    --sidebar-width: 260px;
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
}

a {
    color: inherit;
    text-decoration: none;
}

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

.layout {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    min-height: 100vh;
    background: var(--surface-alt);
}

.sidebar {
    background: rgb(11 17 35);
    border-right: 1px solid rgba(255, 255, 255, 0.08);
    padding: 2.2rem 1.4rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.sidebar__brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    font-size: 1.3rem;
    color: #ffffff;
}

.sidebar__brand-initials,
.sidebar__brand-logo {
    width: 46px;
    height: 46px;
    border-radius: 1rem;
    flex-shrink: 0;
}

.sidebar__brand-initials {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(22, 163, 74, 0.85), rgba(22, 163, 74, 0.45));
    color: var(--bg);
    font-weight: 700;
    letter-spacing: 0.08em;
}

.sidebar__brand-logo {
    object-fit: cover;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.35);
    padding: 0.4rem;
    box-shadow: 0 12px 24px rgba(15, 23, 42, 0.35);
}

.sidebar__brand div {
    color: #ffffff;
    line-height: 1.2;
}


.sidebar nav {
    display: grid;
    gap: 0.5rem;
}

.sidebar nav a {
    padding: 0.7rem 1rem;
    border-radius: 0.75rem;
    color: rgba(255,255,255,0.72);
    transition: background 0.2s ease, transform 0.2s ease, color 0.2s ease;
    font-weight: 500;
}

.sidebar nav a:hover,
.sidebar nav a.active {
    background: rgba(255,255,255,0.12);
    color: #ffffff;
    transform: translateX(4px);
}

.sidebar__footer {
    margin-top: auto;
    display: grid;
    gap: 0.85rem;
    font-size: 0.95rem;
    color: rgba(255,255,255,0.65);
}

.sidebar__footer .logout button {
    width: 100%;
    padding: 0.6rem 0.9rem;
    border-radius: 0.75rem;
    border: 1px solid rgba(255,255,255,0.25);
    background: transparent;
    color: #ffffff;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease;
}

.sidebar__footer .logout button:hover {
    background: rgba(255,255,255,0.12);
    border-color: rgba(255,255,255,0.45);
}


.main {
    padding: 2.4rem clamp(1.8rem, 3vw, 3.4rem);
    display: flex;
    flex-direction: column;
    gap: 2rem;
    background: var(--surface);
}

.main__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-title {
    margin: 0;
    font-size: clamp(1.8rem, 2.4vw, 2.4rem);
    font-weight: 700;
}

.page-title small {
    display: block;
    color: var(--muted);
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.4rem;
}

.cards-grid--vm {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
    background: var(--card);
    border-radius: 1.1rem;
    padding: 1.6rem;
    border: 1px solid rgba(15,23,42,0.08);
    box-shadow: 0 18px 35px rgba(15,23,42,0.12);
}

.card-node {
    position: relative;
    overflow: hidden;
    padding: 1.8rem;
    border: 1px solid rgba(15, 23, 42, 0.1);
    background: linear-gradient(135deg, rgba(22, 163, 74, 0.08), rgba(255, 255, 255, 0.9));
    box-shadow: 0 20px 45px rgba(15, 23, 42, 0.18);
    backdrop-filter: blur(4px);
}

.card-node::after {
    content: "";
    position: absolute;
    inset: auto -60px -80px auto;
    width: 220px;
    height: 220px;
    background: radial-gradient(circle at center, rgba(22, 163, 74, 0.28), transparent 70%);
    opacity: 0.45;
    pointer-events: none;
}

.card-node__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1.2rem;
}

.card-node__subtitle {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: rgba(15, 23, 42, 0.55);
    font-weight: 600;
}

.card-node__title {
    margin: 0.4rem 0 0;
    font-size: clamp(1.2rem, 2vw, 1.6rem);
    font-weight: 700;
}

.card-node__metrics {
    margin-top: 1.6rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
}

.card-vm {
    position: relative;
    overflow: hidden;
    padding: 1.8rem;
    display: grid;
    gap: 1.5rem;
    border: 1px solid rgba(15, 23, 42, 0.1);
    background: rgba(255, 255, 255, 0.96);
}

.card-vm::after {
    content: none;
}

.card-vm__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
}

.card-vm__subtitle {
    display: inline-block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: rgba(15, 23, 42, 0.6);
    font-weight: 600;
}

.card-vm__title {
    margin: 0.35rem 0 0;
    font-size: clamp(1.2rem, 2vw, 1.6rem);
    font-weight: 700;
}

.card-vm__meta {
    display: block;
    margin-top: 0.35rem;
    color: var(--muted);
    font-size: 0.9rem;
}

.card-vm__metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
    gap: 0.9rem;
}

.card-vm__footer {
    display: flex;
    justify-content: flex-end;
}

.card-vm--detail {
    margin-bottom: 2rem;
    gap: 1.8rem;
}

.card-vm__back {
    width: fit-content;
    gap: 0.4rem;
}

.card-vm__header--detail {
    margin-top: 0.6rem;
}

.card-vm__metrics--detail {
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.metric {
    padding: 1rem 1.3rem;
    border-radius: 1rem;
    background: rgba(255, 255, 255, 0.65);
    border: 1px solid rgba(148, 163, 184, 0.16);
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
    display: grid;
    gap: 0.45rem;
}

.metric--compact {
    padding: 0.85rem 1rem;
    box-shadow: 0 10px 22px rgba(15, 23, 42, 0.06);
}

.metric--compact .metric__value {
    font-size: clamp(1.1rem, 2.2vw, 1.5rem);
}

.metric--ip {
    background: rgba(22, 163, 74, 0.12);
    border: 1px solid rgba(22, 163, 74, 0.28);
}

.metric__value--ip {
    font-size: clamp(1.05rem, 2.2vw, 1.35rem);
    letter-spacing: 0.04em;
    word-break: break-word;
}

.metric__label {
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.55);
    font-weight: 600;
}

.metric__value {
    font-size: clamp(1.4rem, 2.8vw, 1.9rem);
    font-weight: 700;
    color: var(--text);
    margin: 0;
}

.metric__hint {
    font-size: 0.85rem;
    color: var(--muted);
}

.alert--spaced {
    margin-bottom: 1rem;
}

.card-section {
    margin-bottom: 2rem;
    display: grid;
    gap: 1.2rem;
}

.section-title {
    margin: 0;
    font-size: clamp(1.1rem, 1.6vw, 1.35rem);
}

.section-note {
    margin: 0;
    color: var(--muted);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.section-header__title {
    margin: 0;
    font-size: 1.3rem;
}

.section-header__subtitle {
    display: block;
    margin-top: 0.2rem;
    color: var(--muted);
}

.section-empty {
    margin: 1.2rem 0 0;
    color: var(--muted);
}

.actions--wrap {
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.cards-grid--ips {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.ip-card {
    padding: 1.2rem;
    border-radius: 1rem;
    background: rgba(255, 255, 255, 0.75);
    border: 1px solid rgba(148, 163, 184, 0.18);
    box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
    display: grid;
    gap: 0.75rem;
}

.ip-card__title {
    font-size: 1.05rem;
    margin: 0;
}

.ip-card__addresses {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.badge-ip {
    display: inline-flex;
    align-items: center;
    justify-content: flex-start;
    padding: 0.4rem 0.65rem;
    border-radius: 0.65rem;
    background: rgba(56, 189, 248, 0.16);
    border: 1px solid rgba(56, 189, 248, 0.28);
    color: var(--primary);
    font-weight: 600;
    letter-spacing: 0.02em;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 0.55rem;
}

.form-check label {
    margin: 0;
}

.form-hint {
    color: var(--muted);
}

.card h2,
.card h3 {
    margin-top: 0;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1.2rem;
    font-size: 0.95rem;
    border-radius: 1rem;
    overflow: hidden;
}

.table thead {
    background: rgba(15, 23, 42, 0.05);
}

.table th,
.table td {
    padding: 0.9rem 0.75rem;
    border-bottom: 1px solid rgba(148, 163, 184, 0.12);
    text-align: left;
    color: var(--muted);
}

.table th {
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.75rem;
    color: rgba(148, 163, 184, 0.75);
}

.status-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.status-running {
    background: rgba(52, 211, 153, 0.14);
    color: var(--success);
    border: 1px solid rgba(52, 211, 153, 0.35);
}

.status-stopped {
    background: rgba(248, 113, 113, 0.14);
    color: var(--danger);
    border: 1px solid rgba(248, 113, 113, 0.35);
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.btn,
button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.1rem;
    border-radius: 0.75rem;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    background: var(--primary);
    color: #ffffff;
}

.btn:hover,
button:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 32px rgba(15, 23, 42, 0.18);
}

.btn-secondary {
    background: rgba(15, 23, 42, 0.85);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.25);
}

.btn-secondary:hover,
.btn-secondary:focus {
    transform: none;
    box-shadow: none;
    color: #ffffff;
}

.btn-danger {
    background: rgba(248, 113, 113, 0.88);
    color: var(--bg);
}

.alert {
    padding: 1rem 1.2rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    background: rgba(15, 23, 42, 0.65);
    color: var(--text);
}

.alert-error { border-color: rgba(248, 113, 113, 0.4); background: rgba(248, 113, 113, 0.12); color: var(--danger); }
.alert-success { border-color: rgba(52, 211, 153, 0.4); background: rgba(52, 211, 153, 0.12); color: var(--success); }

.form-grid {
    display: grid;
    gap: 1rem;
}

.form-grid.two-cols {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.4rem;
    color: #0f172a;
}

input,
select,
textarea {
    width: 100%;
    padding: 0.75rem;
    border-radius: 0.75rem;
    border: 1px solid rgba(15, 23, 42, 0.35);
    background: #ffffff;
    color: #111827;
    font-size: 0.95rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.25);
}

textarea { min-height: 140px; }

.footer {
    margin-top: auto;
    text-align: center;
    color: var(--muted);
    font-size: 0.9rem;
}

@media (max-width: 960px) {
    .layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        flex-direction: row;
        align-items: center;
        gap: 1.5rem;
        padding: 1.4rem;
        position: sticky;
        top: 0;
        z-index: 10;
    }

    .sidebar nav {
        flex: 1;
        display: flex;
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .sidebar__footer {
        margin-top: 0;
        flex-direction: row;
        align-items: center;
        gap: 1rem;
    }

    .main {
        padding: 1.8rem 1.4rem 3rem;
    }
}

@media (max-width: 640px) {
    .sidebar {
        flex-direction: column;
        align-items: flex-start;
    }

    .sidebar nav {
        width: 100%;
    }

    .sidebar__footer {
        width: 100%;
    }

    .sidebar__footer .logout button {
        width: auto;
    }
}