* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0c1015;
    --bg-secondary: #151b24;
    --bg-card: rgba(22, 28, 38, 0.92);
    --bg-card-strong: #1c2430;
    --text-primary: #e7edf5;
    --text-secondary: #90a0b4;
    --border: rgba(120, 138, 160, 0.24);
    --accent-cyan: #39c8ff;
    --accent-green: #46c37b;
    --accent-red: #ef6660;
    --accent-amber: #ffbd59;
    --accent-blue: #5a88ff;
    --shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
    --radius: 10px;
}

body {
    font-family: "Segoe UI", "Helvetica Neue", sans-serif;
    color: var(--text-primary);
    min-height: 100vh;
    padding: 14px;
    background:
        radial-gradient(circle at top left, rgba(57, 200, 255, 0.14), transparent 28%),
        radial-gradient(circle at top right, rgba(90, 136, 255, 0.12), transparent 30%),
        linear-gradient(180deg, #0b0f14 0%, #0f151d 100%);
}

header {
    display: flex;
    gap: 12px;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
}

header h1 {
    font-size: 1.15rem;
    font-weight: 650;
    color: var(--accent-cyan);
}

.page-nav {
    display: flex;
    gap: 6px;
    margin-left: auto;
}

.page-nav a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.82rem;
    padding: 7px 12px;
    border-radius: 7px;
    border: 1px solid transparent;
}

.page-nav a.active {
    color: var(--text-primary);
    background: var(--bg-card-strong);
    border-color: var(--border);
}

.status {
    font-size: 0.76rem;
    padding: 5px 10px;
    border-radius: 999px;
    font-weight: 600;
    border: 1px solid transparent;
}

.status.connected {
    color: var(--accent-green);
    background: rgba(70, 195, 123, 0.12);
    border-color: rgba(70, 195, 123, 0.35);
}

.status.disconnected {
    color: var(--accent-red);
    background: rgba(239, 102, 96, 0.12);
    border-color: rgba(239, 102, 96, 0.35);
}

.header-logo {
    height: 56px;
    width: auto;
    margin-left: 8px;
    flex-shrink: 0;
}

main {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-top: 14px;
}

.control-grid {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 12px;
}

.control-card,
.chart-container,
.value-card,
.result-panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
}

.control-card {
    grid-column: span 12;
    padding: 14px;
}

.control-card-wide {
    grid-column: span 12;
}

.panel-heading {
    display: flex;
    gap: 10px;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.panel-heading h2,
.section-title h2,
.chart-container h2,
.result-panel h2 {
    font-size: 0.82rem;
    font-weight: 620;
    color: var(--text-primary);
    letter-spacing: 0.02em;
}

.helper-text {
    color: var(--text-secondary);
    font-size: 0.82rem;
    line-height: 1.45;
}

.inline-form,
.button-row,
.meta-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
}

.inline-form {
    margin-top: 10px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 12px;
}

.form-grid-wide {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.plot-mode-field {
    margin: 12px 0;
}

.field span {
    font-size: 0.72rem;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
}

.checkbox-field {
    flex-direction: row;
    align-items: center;
    min-height: 42px;
}

.checkbox-field input {
    width: 16px;
    height: 16px;
}

.control-input {
    width: 100%;
    min-height: 40px;
    padding: 9px 11px;
    border-radius: 8px;
    border: 1px solid rgba(144, 160, 180, 0.24);
    background: rgba(10, 14, 20, 0.65);
    color: var(--text-primary);
    font-size: 0.92rem;
}

.control-input:focus {
    outline: 2px solid rgba(57, 200, 255, 0.22);
    border-color: rgba(57, 200, 255, 0.5);
}

.action-btn {
    min-height: 40px;
    padding: 0 14px;
    border: 1px solid transparent;
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.86rem;
    font-weight: 600;
    background: var(--bg-card-strong);
    cursor: pointer;
}

.action-btn.primary {
    background: rgba(57, 200, 255, 0.16);
    border-color: rgba(57, 200, 255, 0.32);
}

.action-btn.accent {
    background: rgba(90, 136, 255, 0.16);
    border-color: rgba(90, 136, 255, 0.34);
}

.action-btn.secondary {
    background: rgba(255, 189, 89, 0.12);
    border-color: rgba(255, 189, 89, 0.3);
}

.action-btn.danger {
    background: rgba(239, 102, 96, 0.14);
    border-color: rgba(239, 102, 96, 0.32);
}

.action-btn.active {
    background: rgba(70, 195, 123, 0.18);
    border-color: rgba(70, 195, 123, 0.36);
}

.action-btn:disabled,
.control-input:disabled,
.checkbox-field input:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.state-pill {
    display: inline-flex;
    align-items: center;
    min-height: 26px;
    padding: 0 10px;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 650;
    border: 1px solid transparent;
}

.state-pill.ok {
    color: var(--accent-green);
    background: rgba(70, 195, 123, 0.12);
    border-color: rgba(70, 195, 123, 0.32);
}

.state-pill.warn {
    color: var(--accent-amber);
    background: rgba(255, 189, 89, 0.12);
    border-color: rgba(255, 189, 89, 0.3);
}

.state-pill.error {
    color: var(--accent-red);
    background: rgba(239, 102, 96, 0.12);
    border-color: rgba(239, 102, 96, 0.3);
}

.state-pill.muted {
    color: var(--text-secondary);
    background: rgba(144, 160, 180, 0.12);
    border-color: rgba(144, 160, 180, 0.2);
}

.instrument-panel {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 4px 12px;
    align-items: baseline;
}

.instrument-label {
    grid-row: span 2;
    font-size: 0.72rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.06em;
}

.instrument-state {
    font-weight: 650;
}

.instrument-message {
    color: var(--text-secondary);
    font-size: 0.82rem;
}

.values-panel {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.value-card {
    padding: 16px;
    text-align: center;
}

.value-card.field-card {
    border-color: rgba(57, 200, 255, 0.34);
}

.value-label {
    margin-bottom: 5px;
    font-size: 0.72rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.value-number {
    font-size: 1.7rem;
    line-height: 1.15;
    font-weight: 700;
    font-family: "Consolas", "Courier New", monospace;
    overflow-wrap: anywhere;
}

.field-card .value-number {
    color: var(--accent-cyan);
}

.value-unit {
    margin-top: 4px;
    font-size: 0.74rem;
    color: var(--text-secondary);
}

.section-title,
.meta-row {
    justify-content: space-between;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.chart-container {
    padding: 14px;
}

.chart-container h2 {
    margin-bottom: 10px;
    color: var(--text-secondary);
}

.chart-container canvas {
    width: 100% !important;
    height: 220px !important;
}

.chart-container-large canvas {
    height: 360px !important;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.result-panel {
    padding: 14px;
}

.result-panel h2 {
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.result-value {
    font-size: 0.95rem;
    font-family: "Consolas", "Courier New", monospace;
    overflow-wrap: anywhere;
}

.result-value.muted {
    color: var(--text-secondary);
}

@media (min-width: 720px) {
    body {
        padding: 18px;
    }

    .control-card {
        grid-column: span 6;
    }

    .instrument-panel {
        grid-column: span 6;
    }

    .control-card-wide {
        grid-column: span 12;
    }

    .chart-container canvas {
        height: 300px !important;
    }

    .chart-container-large canvas {
        height: 470px !important;
    }
}

@media (min-width: 1080px) {
    body {
        max-width: 1280px;
        margin: 0 auto;
    }

    .control-card {
        grid-column: span 4;
    }

    .instrument-panel {
        grid-column: span 4;
    }

    .control-card-wide {
        grid-column: span 8;
    }
}

@media (max-width: 840px) {
    .form-grid-wide {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

@media (max-width: 640px) {
    header {
        flex-direction: column;
        align-items: stretch;
    }

    .page-nav {
        margin-left: 0;
    }

    .header-logo {
        align-self: flex-end;
        height: 48px;
        margin-left: 0;
    }

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

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

    .chart-container canvas {
        height: 240px !important;
    }
}