:root {
    --bg: #0f1115;
    --bg-elevated: #171a21;
    --bg-hover: #1f232c;
    --border: #262b36;
    --text: #e6e8ec;
    --text-muted: #8a92a4;
    --primary: #6366f1;
    --primary-hover: #7c7fff;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --accent: #06b6d4;
    --radius: 12px;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: radial-gradient(1200px 800px at 10% -10%, #1b2030 0%, transparent 60%),
                radial-gradient(1000px 700px at 110% 10%, #1a2333 0%, transparent 60%),
                var(--bg);
    color: var(--text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.app {
    max-width: 1400px;
    margin: 0 auto;
    padding: 32px 24px 48px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    min-height: 100vh;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 8px;
}

.header h1 {
    margin: 0;
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, #a5b4fc 0%, #67e8f9 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo {
    -webkit-text-fill-color: initial;
    filter: drop-shadow(0 0 20px rgba(99, 102, 241, 0.5));
}

.subtitle {
    margin: 8px 0 0;
    color: var(--text-muted);
    font-size: 1rem;
}

/* Support banner */
.support-banner {
    padding: 14px 18px;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fecaca;
    border-radius: var(--radius);
    text-align: center;
}

/* Controls */
.controls {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    padding: 16px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border: 1px solid transparent;
    border-radius: 10px;
    background: transparent;
    color: var(--text);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, #4f46e5 100%);
    color: white;
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-hover) 0%, #6366f1 100%);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: var(--bg-hover);
    border-color: var(--border);
    color: var(--text);
}

.btn-secondary:hover {
    background: #272c38;
    border-color: #343a48;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.icon {
    font-size: 1.1rem;
}

/* Status */
.status {
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
    box-shadow: 0 0 0 0 rgba(138, 146, 164, 0.4);
}

.status.connected .status-dot {
    background: var(--success);
    animation: pulse 2s infinite;
}

.status.connected .status-text {
    color: var(--success);
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.6); }
    70% { box-shadow: 0 0 0 10px rgba(34, 197, 94, 0); }
    100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); }
}

/* Main layout */
.main {
    display: grid;
    grid-template-columns: minmax(320px, 1fr) 2fr;
    gap: 24px;
    flex: 1;
    min-height: 0;
}

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

/* Panels */
.panel {
    display: flex;
    flex-direction: column;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    min-height: 500px;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.02);
}

.panel-header h2 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.01em;
}

.panel-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 24px;
    padding: 0 8px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 0.8rem;
    font-variant-numeric: tabular-nums;
    color: var(--text-muted);
}

.toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    color: var(--text-muted);
    cursor: pointer;
    user-select: none;
}

.toggle input {
    accent-color: var(--primary);
}

/* Devices list */
.devices {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
}

.device {
    padding: 14px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    margin-bottom: 10px;
    transition: border-color 0.15s ease;
}

.device:hover {
    border-color: #343a48;
}

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

.device-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text);
}

.device-state {
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 999px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.device-state.open {
    background: rgba(34, 197, 94, 0.15);
    color: #86efac;
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.device-state.closed {
    background: rgba(138, 146, 164, 0.1);
    color: var(--text-muted);
    border: 1px solid var(--border);
}

.device-meta {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 4px 10px;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--mono);
}

.device-meta dt {
    color: var(--text-muted);
    margin: 0;
}

.device-meta dd {
    margin: 0;
    color: var(--text);
    word-break: break-all;
}

.device-actions {
    margin-top: 10px;
    display: flex;
    gap: 8px;
}

.device-actions .btn {
    padding: 6px 12px;
    font-size: 0.8rem;
}

/* Events list */
.events {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
    font-family: var(--mono);
    font-size: 0.85rem;
}

.event {
    display: grid;
    grid-template-columns: auto auto 1fr;
    gap: 12px;
    padding: 10px 12px;
    margin-bottom: 6px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    border-left: 3px solid var(--accent);
    animation: slideIn 0.15s ease;
}

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

.event-time {
    color: var(--text-muted);
    white-space: nowrap;
}

.event-meta {
    color: var(--accent);
    white-space: nowrap;
}

.event-data {
    color: var(--text);
    word-break: break-all;
    white-space: pre-wrap;
}

.event-data mark {
    background: rgba(245, 158, 11, 0.25);
    color: #fcd34d;
    padding: 0 2px;
    border-radius: 3px;
    font-weight: 600;
}

.event-count {
    margin-left: 8px;
    padding: 1px 8px;
    background: rgba(6, 182, 212, 0.15);
    color: var(--accent);
    border-radius: 999px;
    font-size: 0.75rem;
    font-variant-numeric: tabular-nums;
}

.event.error {
    border-left-color: var(--danger);
}
.event.error .event-meta { color: var(--danger); }

.event.info {
    border-left-color: var(--warning);
}
.event.info .event-meta { color: var(--warning); }

.event.success {
    border-left-color: var(--success);
}
.event.success .event-meta { color: var(--success); }

/* Empty state */
.empty-state {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-muted);
    padding: 40px 20px;
    min-height: 300px;
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: 12px;
    opacity: 0.5;
}

.empty-state p {
    margin: 0;
    font-size: 1rem;
    font-weight: 500;
}

.empty-state small {
    margin-top: 6px;
    font-size: 0.85rem;
    opacity: 0.8;
}

/* Scrollbar */
.devices::-webkit-scrollbar,
.events::-webkit-scrollbar {
    width: 10px;
}

.devices::-webkit-scrollbar-track,
.events::-webkit-scrollbar-track {
    background: transparent;
}

.devices::-webkit-scrollbar-thumb,
.events::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 10px;
    border: 2px solid var(--bg-elevated);
}

.devices::-webkit-scrollbar-thumb:hover,
.events::-webkit-scrollbar-thumb:hover {
    background: #343a48;
}

/* Telephony panel */
.telephony-panel {
    min-height: 0;
}

.panel-hint {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.telephony-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 10px;
    padding: 16px;
}

.switch {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    user-select: none;
    transition: all 0.15s ease;
}

.switch:hover {
    border-color: #343a48;
    background: var(--bg-hover);
}

.switch input {
    appearance: none;
    -webkit-appearance: none;
    width: 36px;
    height: 20px;
    border-radius: 999px;
    background: var(--border);
    position: relative;
    cursor: pointer;
    transition: background 0.15s ease;
    flex-shrink: 0;
}

.switch input::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: white;
    transition: transform 0.15s ease;
}

.switch input:checked {
    background: var(--primary);
}

.switch input:checked::after {
    transform: translateX(16px);
}

.switch input:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Manual send panel */
.manual-panel {
    min-height: 0;
}

.manual-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 12px;
    padding: 16px;
}

.manual-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1 1 220px;
    min-width: 0;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.manual-field-small {
    flex: 0 0 110px;
}

.manual-field-grow {
    flex: 2 1 320px;
}

.manual-field > span {
    letter-spacing: 0.02em;
}

.manual-field select,
.manual-field input {
    width: 100%;
    padding: 9px 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-family: var(--mono);
    font-size: 0.9rem;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.manual-field select:focus,
.manual-field input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.manual-field select {
    appearance: none;
    -webkit-appearance: none;
    background-image: linear-gradient(45deg, transparent 50%, var(--text-muted) 50%),
                      linear-gradient(135deg, var(--text-muted) 50%, transparent 50%);
    background-position: calc(100% - 18px) 50%, calc(100% - 12px) 50%;
    background-size: 6px 6px;
    background-repeat: no-repeat;
    padding-right: 32px;
}

.manual-actions {
    display: flex;
    align-items: center;
}

.manual-actions .btn {
    height: 40px;
}

/* Device reports */
.device-reports {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px dashed var(--border);
    font-family: var(--mono);
    font-size: 0.75rem;
}

.device-reports summary {
    cursor: pointer;
    color: var(--text-muted);
    padding: 4px 0;
}

.device-reports summary:hover {
    color: var(--text);
}

.device-reports-list {
    margin-top: 6px;
    display: grid;
    gap: 4px;
    color: var(--text-muted);
}

.device-reports-list .rep {
    padding: 4px 8px;
    background: rgba(255,255,255,0.02);
    border-radius: 6px;
}

.device-reports-list .rep .tag {
    color: var(--accent);
    font-weight: 600;
}

/* Footer */
.footer {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    padding-top: 16px;
}

.footer a {
    color: var(--accent);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}