:root {
    --bg-start: #060a16;
    --bg-end: #111f33;
    --panel: rgba(9, 21, 39, 0.8);
    --panel-border: rgba(123, 171, 255, 0.26);
    --text: #e8f0ff;
    --muted: #93a5bf;
    --accent: #64e8de;
    --danger: #ff6464;
    --warning: #f6b54f;
    --ok: #4fdd95;
    --unknown: #7387a5;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Space Grotesk", "IBM Plex Sans", "Segoe UI", sans-serif;
    color: var(--text);
    background:
        radial-gradient(60rem 30rem at 10% -10%, rgba(100, 232, 222, 0.18), transparent),
        radial-gradient(40rem 25rem at 100% 0%, rgba(79, 221, 149, 0.15), transparent),
        linear-gradient(165deg, var(--bg-start), var(--bg-end));
}

.app-shell {
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image: linear-gradient(rgba(148, 194, 255, 0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(148, 194, 255, 0.06) 1px, transparent 1px);
    background-size: 3rem 3rem;
    mask-image: radial-gradient(circle at center, #000 30%, transparent 100%);
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 2;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.2rem;
    backdrop-filter: blur(8px);
    background: rgba(5, 13, 24, 0.72);
    border-bottom: 1px solid var(--panel-border);
}

.brand {
    position: relative;
    z-index: 1;
    color: var(--accent);
    font-weight: 700;
    letter-spacing: 0.08em;
    text-decoration: none;
}

.nav-toggle {
    display: none;
    position: relative;
    z-index: 1;
    width: 2.7rem;
    height: 2.7rem;
    border: 1px solid var(--panel-border);
    border-radius: 12px;
    background: rgba(100, 232, 222, 0.08);
    padding: 0.6rem;
    cursor: pointer;
}

.nav-toggle-line {
    display: block;
    width: 100%;
    height: 2px;
    margin: 0.22rem 0;
    border-radius: 999px;
    background: var(--text);
}

.main-nav {
    display: flex;
    gap: 0.8rem;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
}

.inline-form {
    display: inline-flex;
    margin: 0;
}

.main-nav a,
.nav-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text);
    text-decoration: none;
    padding: 0.45rem 0.75rem;
    border-radius: 999px;
    border: 1px solid transparent;
    background: transparent;
    font: inherit;
    cursor: pointer;
}

.main-nav .cta,
.main-nav a:hover,
.nav-button:hover {
    border-color: var(--panel-border);
    background: rgba(100, 232, 222, 0.1);
}

.user-chip {
    display: inline-flex;
    align-items: center;
    padding: 0.45rem 0.75rem;
    border-radius: 999px;
    color: var(--accent);
    border: 1px solid var(--panel-border);
    background: rgba(100, 232, 222, 0.08);
}

.content {
    position: relative;
    z-index: 1;
    width: min(1200px, 94vw);
    margin: 2rem auto;
}

.hero h1 {
    margin: 0;
    font-size: clamp(1.6rem, 3vw, 2.6rem);
}

.hero p {
    color: var(--muted);
}

.panel {
    margin-top: 1.2rem;
    padding: 1rem;
    border: 1px solid var(--panel-border);
    border-radius: 18px;
    background: var(--panel);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.22);
    overflow: hidden;
}

.panel-narrow {
    max-width: 720px;
}

.device-table {
    width: 100%;
    border-collapse: collapse;
}

.device-table th,
.device-table td {
    padding: 0.58rem 0.7rem;
    border-bottom: 1px solid rgba(147, 165, 191, 0.24);
    vertical-align: middle;
}

.device-table th {
    color: #acc1df;
    font-weight: 600;
    text-align: left;
}

.device-table a {
    color: #96f0ff;
}

.status-pack {
    display: flex;
    gap: 0.45rem;
    flex-wrap: wrap;
    align-items: center;
    min-width: 0;
}

.status {
    display: inline-block;
    border-radius: 999px;
    padding: 0.14rem 0.55rem;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.status-ok {
    background: rgba(79, 221, 149, 0.17);
    color: #a5fbc8;
}

.status-error {
    background: rgba(255, 100, 100, 0.18);
    color: #ffb0b0;
}

.status-warn {
    background: rgba(246, 181, 79, 0.2);
    color: #ffd69d;
}

.status-unknown {
    background: rgba(115, 135, 165, 0.3);
    color: #d6e3f9;
}

.actions {
    display: flex;
    gap: 0.45rem;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: flex-start;
}

.actions form {
    margin: 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.42rem;
    border: 1px solid var(--panel-border);
    border-radius: 10px;
    color: var(--text);
    background: rgba(100, 232, 222, 0.08);
    text-decoration: none;
    font: inherit;
    font-size: 0.77rem;
    line-height: 1;
    white-space: nowrap;
    cursor: pointer;
    padding: 0.32rem 0.5rem;
}

.btn-ghost {
    background: transparent;
}

.btn-danger {
    border-color: rgba(255, 100, 100, 0.4);
    background: rgba(255, 100, 100, 0.13);
}

.btn-compact {
    min-height: 1.8rem;
}

.btn-icon {
    display: inline-flex;
    width: 0.95rem;
    height: 0.95rem;
    flex: 0 0 0.95rem;
}

.btn-icon svg {
    width: 100%;
    height: 100%;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

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

.cell-name strong,
.device-table td > a {
    overflow: hidden;
    text-overflow: ellipsis;
}

.device-table td > a,
.cell-name strong {
    display: block;
}

.device-address {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.flash {
    margin-bottom: 0.75rem;
    padding: 0.66rem 0.8rem;
    border-radius: 10px;
}

.flash-success {
    background: rgba(79, 221, 149, 0.17);
}

.flash-error {
    background: rgba(255, 100, 100, 0.16);
}

.device-form label {
    display: block;
    margin-bottom: 0.3rem;
    color: #bfd4ef;
}

.device-form input,
.device-form select,
.device-form textarea {
    width: 100%;
    border-radius: 10px;
    border: 1px solid rgba(147, 165, 191, 0.35);
    color: var(--text);
    padding: 0.55rem 0.62rem;
    background: rgba(10, 20, 37, 0.85);
}

.device-form textarea {
    min-height: 110px;
}

.device-form ul {
    margin: 0.4rem 0 0;
    padding-left: 1rem;
    color: #ffb0b0;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.9rem;
}

.form-span-2 {
    grid-column: span 2;
}

.checkboxes input {
    width: auto;
    margin-right: 0.4rem;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (max-width: 900px) {
    .content {
        width: min(100%, calc(100vw - 1.2rem));
        margin: 1rem auto 1.5rem;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .form-span-2 {
        grid-column: span 1;
    }

    .topbar {
        display: grid;
        grid-template-columns: 1fr auto;
        gap: 0.8rem;
        padding: 0.85rem 0.9rem;
    }

    .nav-toggle {
        display: inline-block;
    }

    .main-nav {
        grid-column: 1 / -1;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0.55rem;
        padding: 0.85rem;
        border: 1px solid var(--panel-border);
        border-radius: 18px;
        background: rgba(6, 15, 27, 0.9);
    }

    .main-nav[data-open="true"] {
        display: flex;
    }

    .main-nav a,
    .nav-button,
    .inline-form {
        width: 100%;
    }

    .main-nav a,
    .nav-button,
    .user-chip {
        justify-content: center;
        text-align: center;
    }

    .inline-form {
        display: flex;
    }

    .col-id {
        display: none;
    }

    .device-table th,
    .device-table td {
        padding-left: 0.55rem;
        padding-right: 0.55rem;
    }
}

@media (max-width: 760px) {
    .panel {
        padding: 0.8rem;
    }

    .col-api-port {
        display: none;
    }

    .device-address {
        display: none;
    }

    .status {
        padding: 0.12rem 0.45rem;
        font-size: 0.7rem;
    }

    .actions {
        gap: 0.28rem;
    }

    .btn-compact {
        width: 1.65rem;
        min-width: 1.65rem;
        min-height: 1.65rem;
        padding: 0.22rem;
        border-radius: 9px;
    }

    .btn-label {
        display: none;
    }

    .btn-icon {
        width: 0.85rem;
        height: 0.85rem;
        flex-basis: 0.85rem;
    }
}

@media (max-width: 620px) {
    .device-table th,
    .device-table td {
        padding-left: 0.35rem;
        padding-right: 0.35rem;
    }

}

@media (max-width: 540px) {
    .device-table th,
    .device-table td {
        font-size: 0.92rem;
    }

    .status-pack {
        gap: 0.25rem;
    }

    .status {
        padding: 0.08rem 0.28rem;
        font-size: 0.58rem;
    }

    .btn-compact {
        width: 1.5rem;
        min-width: 1.5rem;
        min-height: 1.5rem;
        padding: 0.16rem;
    }

    .btn-icon {
        width: 0.74rem;
        height: 0.74rem;
        flex-basis: 0.74rem;
    }
}