:root {
    --bg: #f3f8fb;
    --ink: #1d2a3b;
    --ink-soft: #48607a;
    --panel: #ffffff;
    --brand: #0a7db8;
    --brand-dark: #045f93;
    --accent: #f59f1a;
    --ok: #0a8f57;
    --bad: #cb3d3d;
    --ring: rgba(10, 125, 184, 0.18);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: 'Space Grotesk', 'Segoe UI', sans-serif;
    color: var(--ink);
    background:
        radial-gradient(60rem 60rem at 10% -10%, rgba(10, 125, 184, 0.18), transparent 55%),
        radial-gradient(40rem 40rem at 90% 0%, rgba(245, 159, 26, 0.16), transparent 50%),
        var(--bg);
}

.app-shell {
    max-width: 980px;
    margin: 0 auto;
    padding: 1rem 1rem 2.5rem;
}

.hero {
    padding: 1.1rem;
    border-radius: 22px;
    background: linear-gradient(150deg, #0c1a2b 0%, #163a5a 48%, #0b7fb8 100%);
    color: #eff8ff;
    box-shadow: 0 24px 48px -34px rgba(5, 24, 48, 0.8);
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: '';
    position: absolute;
    inset: auto -5rem -6rem auto;
    width: 18rem;
    height: 18rem;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.35), transparent 65%);
}

.hero-topline {
    font-size: 0.78rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    opacity: 0.8;
}

h1 {
    font-family: 'Fraunces', Georgia, serif;
    margin: 0.45rem 0 0.4rem;
    font-size: clamp(1.5rem, 4.8vw, 2.25rem);
    line-height: 1.2;
}

.hero p {
    margin: 0;
    max-width: 42ch;
    color: rgba(245, 250, 255, 0.9);
}

.actions {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    min-height: 44px;
    border-radius: 999px;
    padding: 0.62rem 1rem;
    border: 0;
    text-decoration: none;
    font-weight: 700;
    cursor: pointer;
    transition: transform 120ms ease, opacity 120ms ease, box-shadow 120ms ease;
}

.btn:hover {
    transform: translateY(-1px);
}

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

.btn.primary {
    color: #062238;
    background: linear-gradient(135deg, #f9b544 0%, #ffd27c 100%);
    box-shadow: 0 10px 22px -16px rgba(249, 181, 68, 0.85);
}

.btn.ghost {
    color: #e9f5ff;
    background: transparent;
    border: 1px solid rgba(233, 245, 255, 0.45);
}

.meta-row {
    margin-top: 0.95rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: center;
    font-size: 0.88rem;
}

.status-pill {
    background: rgba(255, 255, 255, 0.16);
    color: #edf8ff;
    padding: 0.3rem 0.62rem;
    border-radius: 999px;
}

.flash {
    margin-top: 0.9rem;
    border-radius: 12px;
    padding: 0.72rem 0.85rem;
    border: 1px solid transparent;
    background: var(--panel);
}

.flash-success {
    border-color: rgba(10, 143, 87, 0.25);
    color: #0e6a43;
}

.flash-error {
    border-color: rgba(203, 61, 61, 0.25);
    color: #8f2222;
}

.device-grid {
    margin-top: 1rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.8rem;
}

.device-card {
    background: var(--panel);
    border: 1px solid #d7e6f2;
    border-radius: 20px;
    padding: 1rem;
    box-shadow: 0 18px 40px -32px rgba(17, 45, 69, 0.45);
}

.device-card.placeholder {
    border-style: dashed;
    color: var(--ink-soft);
}

.card-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.55rem;
}

.card-head h2 {
    margin: 0;
    font-size: 1.05rem;
    line-height: 1.25;
}

.chip {
    font-size: 0.73rem;
    border-radius: 999px;
    padding: 0.2rem 0.55rem;
    background: #e8f3fa;
    color: #155278;
    font-weight: 700;
    white-space: nowrap;
}

.connection {
    margin: 0.6rem 0 0.8rem;
    font-weight: 700;
    font-size: 0.82rem;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.connection.online {
    color: var(--ok);
}

.connection.offline {
    color: var(--bad);
}

dl {
    margin: 0;
    display: grid;
    gap: 0.45rem;
}

.hc-tiles {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.65rem;
}

.hc-tile {
    position: relative;
    background: #fff;
    border-radius: 14px;
    border: 1px solid #d9e8f5;
    padding: 0.72rem 0.72rem 0.72rem 0.86rem;
    box-shadow: 0 10px 22px -20px rgba(18, 43, 68, 0.8);
    overflow: hidden;
}

.hc-tile::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 5px;
    background: linear-gradient(180deg, #2e86f0 0%, #4ca9ff 100%);
}

.hc-value {
    font-size: 1.15rem;
    font-weight: 700;
    color: #20334a;
    line-height: 1.1;
}

.hc-label {
    margin-top: 0.24rem;
    font-size: 0.88rem;
    color: #6e859e;
    line-height: 1.15;
}

.hc-list {
    border-radius: 14px;
    border: 1px solid #d9e8f5;
    overflow: hidden;
    background: #fff;
}

.hc-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.8rem;
    padding: 0.75rem 0.85rem;
    border-bottom: 1px solid #e4edf5;
}

.hc-row:last-child {
    border-bottom: 0;
}

.hc-row-label {
    font-size: 0.86rem;
    color: #748aa2;
}

.hc-row-value {
    font-size: 1.02rem;
    font-weight: 700;
    color: #1f3043;
}

.hc-controls {
    margin-top: 0.75rem;
    display: flex;
    gap: 0.55rem;
}

.hc-control-btn {
    flex: 1;
    min-height: 42px;
    border-radius: 999px;
    border: 1px solid #b9d2ea;
    background: #f6fbff;
    color: #13436a;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
}

.hc-control-btn:hover {
    background: #eaf5ff;
}

.hc-control-btn:disabled {
    opacity: 0.65;
    cursor: default;
}

.row {
    display: grid;
    gap: 0.25rem;
}

dt {
    margin: 0;
    font-size: 0.78rem;
    color: #587392;
    word-break: break-word;
}

dd {
    margin: 0;
    font-size: 0.92rem;
    color: #172538;
    word-break: break-word;
}

.btn:focus-visible,
a:focus-visible {
    outline: 3px solid var(--ring);
    outline-offset: 2px;
}

@media (min-width: 700px) {
    .app-shell {
        padding: 1.5rem 1.5rem 3rem;
    }

    .hero {
        padding: 1.4rem;
    }

    .device-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}