/* Wi-Fi Channel Optimizer — style.css — Network Tech Dark Mode */

:root {
    --bg: #0A0F1A;
    --bg2: #0D1425;
    --surface: #111B30;
    --surface2: #162040;
    --border: #1F3055;
    --cyan: #00B4D8;
    --cyan2: #90E0EF;
    --magenta: #FF006E;
    --magenta2: #FF4D9D;
    --green: #06D6A0;
    --yellow: #FFD60A;
    --text: #CBE5F5;
    --muted: #3D5580;
    --radius: 10px;
}

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

html,
body {
    min-height: 100%;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', system-ui;
    font-size: 13px;
    -webkit-font-smoothing: antialiased;
}

/* ── Header ──────────────────────────────────────────── */
.hdr {
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    padding: 8px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    font-size: 1.2rem;
}

h1 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--cyan2);
}

.hdr-badge {
    font-size: 0.62rem;
    background: rgba(0, 180, 216, 0.1);
    border: 1px solid rgba(0, 180, 216, 0.2);
    color: var(--cyan);
    border-radius: 10px;
    padding: 2px 10px;
}

/* ── Config bar ──────────────────────────────────────── */
.config-bar {
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    padding: 8px 20px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
}

.cfg-group {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.cfg-label {
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    font-weight: 700;
}

.cfg-select {
    background: var(--surface2);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 7px;
    padding: 5px 8px;
    font-size: 0.75rem;
    outline: none;
    font-family: 'JetBrains Mono', monospace;
}

.cfg-select:focus {
    border-color: var(--cyan);
}

/* ── Reco banner ─────────────────────────────────────── */
.reco-banner {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    padding: 10px 20px;
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
}

.reco-banner.hidden {
    display: none;
}

.reco-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.reco-24 {
    border-color: rgba(0, 180, 216, 0.3);
}

.reco-5 {
    border-color: rgba(6, 214, 160, 0.3);
}

.reco-score {
    border-color: rgba(255, 0, 110, 0.3);
}

.reco-icon {
    font-size: 1.5rem;
}

.reco-title {
    font-size: 0.6rem;
    text-transform: uppercase;
    color: var(--muted);
    font-weight: 700;
    letter-spacing: 0.08em;
}

.reco-val {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--cyan2);
    font-family: 'JetBrains Mono', monospace;
}

/* ── Main content ────────────────────────────────────── */
.main {
    padding: 12px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

/* ── Tabs ────────────────────────────────────────────── */
.tab-nav {
    display: flex;
    gap: 2px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 14px;
}

.tab-btn {
    padding: 7px 14px;
    border-radius: 8px 8px 0 0;
    font-size: 0.78rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    border-bottom: none;
    background: transparent;
    color: var(--muted);
    transition: all 0.18s;
    white-space: nowrap;
}

.tab-btn.active {
    background: var(--surface);
    border-color: var(--border);
    color: var(--cyan2);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ── Card ────────────────────────────────────────────── */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 16px;
}

.card-title {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--cyan2);
    margin-bottom: 12px;
}

/* ── Spectrum canvas ─────────────────────────────────── */
.spectrum-canvas {
    width: 100%;
    height: 250px;
    border-radius: 8px;
    display: block;
}

.legend-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
}

.leg-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.68rem;
}

.leg-dot {
    width: 10px;
    height: 10px;
    border-radius: 3px;
}

/* ── Compare grid ────────────────────────────────────── */
.compare-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.compare-summary {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.cs-row {
    display: flex;
    justify-content: space-between;
    padding: 7px 10px;
    background: var(--surface2);
    border-radius: 7px;
    font-size: 0.78rem;
}

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

.cs-val {
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
}

.cs-val.good {
    color: var(--green);
}

.cs-val.bad {
    color: var(--magenta);
}

.cs-val.neutral {
    color: var(--cyan2);
}

/* ── Tips grid ───────────────────────────────────────── */
.tips-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

/* Room diagram */
.room-diagram {
    border: 2px solid var(--border);
    border-radius: 8px;
    height: 130px;
    position: relative;
    margin-bottom: 10px;
    overflow: hidden;
    background: var(--surface2);
}

.room-walls {
    position: relative;
    width: 100%;
    height: 100%;
}

.room-label {
    position: absolute;
    font-size: 0.6rem;
    color: var(--muted);
}

.top-left {
    top: 5px;
    left: 8px;
}

.top-right {
    top: 5px;
    right: 8px;
}

.bot-left {
    bottom: 5px;
    left: 8px;
}

.bot-right {
    bottom: 5px;
    right: 8px;
}

.router-dot {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.5rem;
    text-align: center;
    cursor: default;
}

.router-hint {
    display: block;
    font-size: 0.6rem;
    color: var(--cyan2);
    white-space: nowrap;
    margin-top: 2px;
}

.tips-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.tips-list li {
    font-size: 0.75rem;
    color: var(--text);
    display: flex;
    gap: 6px;
}

.tips-list li::before {
    content: '✓';
    color: var(--green);
    font-weight: 700;
    flex-shrink: 0;
}

/* QoS table */
.qos-table {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.qos-row {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr 1.5fr;
    gap: 8px;
    padding: 5px 8px;
    border-radius: 6px;
    font-size: 0.72rem;
}

.qos-row.hdr {
    font-size: 0.6rem;
    text-transform: uppercase;
    color: var(--muted);
    font-weight: 700;
    padding-bottom: 4px;
}

.qos-row:not(.hdr) {
    background: var(--surface2);
}

.pri-high {
    color: var(--green);
    font-weight: 700;
}

.pri-med {
    color: var(--yellow);
    font-weight: 700;
}

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

/* Band table */
.band-table {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.bt-row {
    display: grid;
    grid-template-columns: 1fr 2fr 2fr;
    gap: 8px;
    align-items: center;
    padding: 8px;
    background: var(--surface2);
    border-radius: 7px;
}

.bt-band {
    font-weight: 700;
    font-size: 0.75rem;
}

.bt-band.cyan {
    color: var(--cyan2);
}

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

.bt-devices {
    font-size: 0.72rem;
    color: var(--text);
}

.bt-why {
    font-size: 0.68rem;
    color: var(--muted);
}

/* WiFi 6 explainer */
.wifi6-grid {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.w6-card {
    padding: 10px 12px;
    background: var(--surface2);
    border-radius: 8px;
}

.w6-badge {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
}

.w6-badge.cyan {
    color: var(--cyan2);
}

.w6-badge.magenta {
    color: var(--magenta2);
}

.w6-desc {
    font-size: 0.72rem;
    color: var(--muted);
    line-height: 1.5;
}

/* ── Buttons ─────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 7px 14px;
    border-radius: 8px;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.18s;
    white-space: nowrap;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: var(--cyan);
    color: var(--bg);
}

.btn-primary:hover {
    background: var(--cyan2);
}

.btn-sm {
    padding: 4px 10px;
    font-size: 0.7rem;
}

/* ── Toast ───────────────────────────────────────────── */
#toast-wrap {
    position: fixed;
    bottom: 16px;
    right: 16px;
    z-index: 600;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.toast {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 14px;
    font-size: 0.8rem;
    animation: slide-up .2s ease;
}

.toast.ok {
    border-color: rgba(6, 214, 160, .4);
    color: #6EE7B7;
}

.toast.err {
    border-color: rgba(255, 0, 110, .4);
    color: var(--magenta2);
}

@keyframes slide-up {
    from {
        transform: translateY(8px);
        opacity: 0;
    }
}

.hidden {
    display: none !important;
}

@media (max-width: 700px) {

    .compare-grid,
    .tips-grid {
        grid-template-columns: 1fr;
    }

    .reco-banner {
        grid-template-columns: 1fr;
    }
}