:root {
    --bg: #0b0b12;
    --panel: #16161f;
    --panel-2: #1e1e2a;
    --border: #2a2a38;
    --text: #e8e8f0;
    --muted: #8b8b9e;
    --accent: #ff7a18;
    --accent-2: #ffb347;
    --green: #38d39f;
    --red: #ff5c6c;
    --blue: #6ea8ff;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Segoe UI", Roboto, system-ui, sans-serif;
    background: radial-gradient(1200px 600px at 50% -10%, #1a1a28 0%, var(--bg) 60%);
    color: var(--text);
}

code {
    background: var(--panel-2);
    padding: 2px 6px;
    border-radius: 5px;
    color: var(--accent-2);
    font-size: 0.9em;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 28px;
    border-bottom: 1px solid var(--border);
    background: rgba(11, 11, 18, 0.7);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 10;
}

.topbar h1 {
    margin: 0;
    font-size: 20px;
    letter-spacing: 0.4px;
}

.topbar p {
    margin: 4px 0 0;
    font-size: 13px;
    color: var(--muted);
}

.status {
    padding: 7px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    border: 1px solid var(--border);
    white-space: nowrap;
}

.status.online {
    color: var(--green);
    border-color: rgba(56, 211, 159, 0.4);
    background: rgba(56, 211, 159, 0.1);
}

.status.offline {
    color: var(--red);
    border-color: rgba(255, 92, 108, 0.4);
    background: rgba(255, 92, 108, 0.1);
}

main {
    display: grid;
    grid-template-columns: minmax(360px, 1fr) minmax(320px, 1fr);
    gap: 20px;
    padding: 24px 28px 48px;
    align-items: start;
}

@media (max-width: 900px) {
    main {
        grid-template-columns: 1fr;
    }
}

.controls {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.card {
    background: linear-gradient(180deg, var(--panel) 0%, #13131b 100%);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 18px 18px 20px;
}

.card h2 {
    margin: 0 0 14px;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--accent);
}

label {
    display: flex;
    flex-direction: column;
    gap: 5px;
    font-size: 12px;
    color: var(--muted);
    margin-bottom: 10px;
}

input,
textarea {
    width: 100%;
    padding: 9px 11px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--panel-2);
    color: var(--text);
    font-family: inherit;
    font-size: 14px;
    outline: none;
    transition: border-color 0.15s ease;
}

input:focus,
textarea:focus {
    border-color: var(--accent);
}

textarea {
    min-height: 96px;
    font-family: "Cascadia Code", Consolas, monospace;
    font-size: 13px;
    resize: vertical;
}

.switch {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
    font-size: 14px;
    color: var(--text);
    cursor: pointer;
    user-select: none;
}

.switch input {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

button {
    font: inherit;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.3px;
    color: var(--text);
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: 9px;
    padding: 10px 12px;
    cursor: pointer;
    transition: transform 0.06s ease, border-color 0.15s, background 0.15s;
}

button:hover {
    border-color: var(--accent);
    background: #26263a;
}

button:active {
    transform: translateY(1px);
}

#category-buttons button {
    font-weight: 700;
    color: var(--accent-2);
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.actions button {
    flex: 1 1 auto;
}

.log-card {
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - 120px);
    position: sticky;
    top: 96px;
}

.log-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.log-header h2 {
    margin: 0;
}

.log {
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding-right: 4px;
}

.log-entry {
    display: grid;
    grid-template-columns: 68px 24px 1fr;
    gap: 6px;
    align-items: start;
    padding: 8px 10px;
    border-radius: 8px;
    background: var(--panel-2);
    border-left: 3px solid var(--border);
    font-size: 12.5px;
    animation: fade 0.18s ease;
}

@keyframes fade {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

.log-entry.sent {
    border-left-color: var(--accent);
}

.log-entry.received {
    border-left-color: var(--blue);
}

.log-entry.error {
    border-left-color: var(--red);
}

.log-time {
    color: var(--muted);
    font-variant-numeric: tabular-nums;
}

.log-arrow {
    font-weight: 700;
    text-align: center;
}

.log-arrow.sent { color: var(--accent); }
.log-arrow.received { color: var(--blue); }
.log-arrow.error { color: var(--red); }

.log-json {
    word-break: break-word;
    font-family: "Cascadia Code", Consolas, monospace;
    color: #d6d6e6;
}