/* ============================================================
   ESP32 LD2453 — Radar Web Visualizer
   Beautiful UI with light/dark themes, responsive layout
   ============================================================ */

/* ---------- Design tokens ---------- */
:root {
    /* Catppuccin Mocha (dark) */
    --bg:            #1e1e2e;
    --bg-elev-1:     #313244;
    --bg-elev-2:     #45475a;
    --surface:       #181825;
    --border:        #45475a;
    --text:          #cdd6f4;
    --text-muted:    #a6adc8;
    --text-dim:      #6c7086;

    --accent-blue:   #89b4fa;
    --accent-mauve:  #cba6f7;
    --accent-pink:   #f5c2e7;
    --accent-red:    #f38ba8;
    --accent-peach:  #fab387;
    --accent-yellow: #f9e2af;
    --accent-green:  #a6e3a1;
    --accent-teal:   #94e2d5;
    --accent-sky:    #74c7ec;

    --z1:            #a6e3a1;
    --z1-strong:     #40a02b;
    --z2:            #fab387;
    --z2-strong:     #fe640b;
    --z3:            #f38ba8;
    --z3-strong:     #d20f39;

    --t1:            #f9e2af;
    --t2:            #cba6f7;
    --t3:            #74c7ec;

    --status-ok:     #a6e3a1;
    --status-warn:   #f9e2af;
    --status-err:    #f38ba8;

    --radius:        14px;
    --radius-sm:     8px;
    --radius-lg:     20px;
    --shadow:        0 10px 30px rgba(0, 0, 0, 0.35);
    --shadow-sm:     0 2px 6px rgba(0, 0, 0, 0.2);

    --header-h:      72px;
}

[data-theme="light"] {
    /* Catppuccin Latte (light) */
    --bg:            #eff1f5;
    --bg-elev-1:     #e6e9ef;
    --bg-elev-2:     #dce0e8;
    --surface:       #ffffff;
    --border:        #ccd0da;
    --text:          #4c4f69;
    --text-muted:    #6c6f85;
    --text-dim:      #8c8fa1;

    --accent-blue:   #1e66f5;
    --accent-mauve:  #8839ef;
    --accent-pink:   #ea76cb;
    --accent-red:    #d20f39;
    --accent-peach:  #fe640b;
    --accent-yellow: #df8e1d;
    --accent-green:  #40a02b;
    --accent-teal:   #179299;
    --accent-sky:    #04a5e5;

    --z1:            #40a02b;
    --z1-strong:     #2d7a1e;
    --z2:            #fe640b;
    --z2-strong:     #cc4f05;
    --z3:            #d20f39;
    --z3-strong:     #9c0a29;

    --t1:            #df8e1d;
    --t2:            #8839ef;
    --t3:            #04a5e5;

    --shadow:        0 10px 30px rgba(76, 79, 105, 0.12);
    --shadow-sm:     0 2px 6px rgba(76, 79, 105, 0.08);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    transition: background .3s ease, color .3s ease;
    -webkit-font-smoothing: antialiased;
    line-height: 1.5;
}
h1, h2, h3, h4 { margin: 0; font-weight: 600; }
input, button { font-family: inherit; color: inherit; }

/* ---------- Header ---------- */
.app-header {
    position: sticky; top: 0; z-index: 50;
    height: var(--header-h);
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 24px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow-sm);
}
.logo { display: flex; align-items: center; gap: 12px; }
.logo-radar-dot { fill: var(--accent-red); }
.logo-arc { fill: none; stroke: var(--accent-blue); stroke-width: 4; stroke-linecap: round; }
.logo-ring { fill: none; stroke: var(--accent-blue); stroke-width: 2; opacity: .5; }
.logo-text h1 { font-size: 20px; letter-spacing: .2px; }
.logo-text .subtitle { font-size: 12px; color: var(--text-muted); display: block; margin-top: 2px; }

.header-right { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

/* Status chip */
.status-chip {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 6px 12px;
    background: var(--bg-elev-1);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 12px; font-weight: 500;
}
.status-dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--status-warn);
    box-shadow: 0 0 0 3px rgba(249, 226, 175, 0.15);
    animation: pulse 2s ease-in-out infinite;
}
.status-dot.status-ok   { background: var(--status-ok);   box-shadow: 0 0 0 3px rgba(166, 227, 161, .2); }
.status-dot.status-err  { background: var(--status-err);  box-shadow: 0 0 0 3px rgba(243, 139, 168, .2); }
@keyframes pulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.25); } }

/* Icon buttons */
.icon-btn, .lang-btn {
    display: inline-flex; align-items: center; justify-content: center;
    width: 40px; height: 40px;
    background: var(--bg-elev-1);
    border: 1px solid var(--border);
    border-radius: 12px;
    cursor: pointer;
    transition: all .2s ease;
    color: var(--text);
}
.icon-btn:hover, .lang-btn:hover { background: var(--bg-elev-2); transform: translateY(-1px); }
.icon-btn svg { fill: none; stroke: var(--text); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.icon-btn .icon-moon { display: none; }
[data-theme="dark"]  .icon-btn .icon-sun { display: none; }
[data-theme="dark"]  .icon-btn .icon-moon { display: block; }
[data-theme="light"] .icon-btn .icon-sun { display: block; }
[data-theme="light"] .icon-btn .icon-moon { display: none; }

/* Lang button */
.lang-btn { width: auto; padding: 0 10px; gap: 4px; font-size: 12px; font-weight: 700; }
.lang-vi, .lang-en { opacity: .45; transition: opacity .2s; }
[data-lang="vi"] .lang-vi { color: var(--accent-blue); opacity: 1; }
[data-lang="en"] .lang-en { color: var(--accent-blue); opacity: 1; }
.lang-sep { color: var(--text-dim); font-weight: 400; }

/* ---------- Main layout ---------- */
.app-main {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 20px;
    padding: 20px;
    max-width: 1600px;
    margin: 0 auto;
}
@media (max-width: 1024px) {
    .app-main { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
    .app-header { padding: 0 14px; height: 64px; }
    .logo-text h1 { font-size: 16px; }
    .logo-text .subtitle { font-size: 10px; }
    .app-main { padding: 12px; gap: 14px; }
    .status-chip span:last-child { display: none; }
    .status-chip { padding: 6px 8px; }
}

/* ---------- Panels ---------- */
.panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex; flex-direction: column;
    box-shadow: var(--shadow);
}
.panel-header {
    padding: 16px 20px;
    display: flex; align-items: center; justify-content: space-between;
    gap: 12px; flex-wrap: wrap;
    border-bottom: 1px solid var(--border);
    background: linear-gradient(180deg, var(--bg-elev-1), transparent);
}
.panel-header h2 { font-size: 16px; }
.panel-tools { display: flex; gap: 8px; flex-wrap: wrap; }
.chip-toggle {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 10px;
    background: var(--bg-elev-1);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 12px;
    cursor: pointer;
    transition: all .2s ease;
    user-select: none;
}
.chip-toggle:hover { background: var(--bg-elev-2); }
.chip-toggle input { accent-color: var(--accent-blue); }

/* Canvas wrapper */
.canvas-wrap {
    position: relative;
    flex: 1;
    min-height: 520px;
    background:
        radial-gradient(ellipse at center bottom, rgba(137, 180, 250, 0.06), transparent 60%),
        var(--bg);
}
#radarCanvas {
    display: block;
    width: 100%;
    height: 100%;
    min-height: 520px;
}

/* Legend */
.legend {
    position: absolute;
    top: 12px; left: 12px;
    background: rgba(24, 24, 37, .78);
    color: #cdd6f4;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-size: 12px;
    min-width: 160px;
    box-shadow: var(--shadow-sm);
}
[data-theme="light"] .legend { background: rgba(255,255,255,.85); color: #4c4f69; }
.legend-title { font-weight: 700; margin-bottom: 8px; color: var(--accent-blue); font-size: 11px; text-transform: uppercase; letter-spacing: .5px; }
.legend-item { display: flex; align-items: center; gap: 8px; padding: 3px 0; }
.legend-divider { height: 1px; background: var(--border); margin: 8px 0; }
.swatch { width: 12px; height: 12px; border-radius: 50%; border: 2px solid rgba(255,255,255,.6); }
.swatch-t1 { background: var(--t1); }
.swatch-t2 { background: var(--t2); }
.swatch-t3 { background: var(--t3); }
.swatch-zone { width: 14px; height: 10px; border-radius: 3px; border: 1.5px solid; }
.swatch-zone.z1 { background: color-mix(in srgb, var(--z1) 30%, transparent); border-color: var(--z1); }
.swatch-zone.z2 { background: color-mix(in srgb, var(--z2) 30%, transparent); border-color: var(--z2); }
.swatch-zone.z3 { background: color-mix(in srgb, var(--z3) 30%, transparent); border-color: var(--z3); }

/* Node info */
.node-info {
    position: absolute;
    bottom: 12px; left: 50%; transform: translateX(-50%);
    display: inline-flex; align-items: center; gap: 10px;
    padding: 8px 16px;
    background: rgba(24, 24, 37, .78);
    color: #cdd6f4;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-family: "JetBrains Mono", "Consolas", monospace;
    font-size: 12px;
    box-shadow: var(--shadow-sm);
}
[data-theme="light"] .node-info { background: rgba(255,255,255,.85); color: #4c4f69; }
.node-info .node-id { font-weight: 700; color: var(--accent-blue); }
.node-info .sep { color: var(--text-dim); }

/* ---------- Side panel ---------- */
.panel-side { display: flex; flex-direction: column; gap: 16px; padding: 16px; background: transparent; border: none; box-shadow: none; }

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 18px;
    box-shadow: var(--shadow-sm);
}
.card h3 { font-size: 14px; margin-bottom: 12px; color: var(--accent-blue); }
.card-header-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.card-header-row h3 { margin-bottom: 0; }

.btn-link {
    background: none; border: none; color: var(--accent-blue);
    font-size: 12px; font-weight: 600; cursor: pointer; padding: 4px 8px;
    border-radius: 6px;
    transition: background .2s;
}
.btn-link:hover { background: var(--bg-elev-1); }

/* Stats grid */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}
.stat {
    padding: 10px 12px;
    background: var(--bg-elev-1);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}
.stat-label { font-size: 11px; color: var(--text-muted); margin-bottom: 4px; text-transform: uppercase; letter-spacing: .3px; }
.stat-value { font-size: 22px; font-weight: 700; font-family: "JetBrains Mono", "Consolas", monospace; }
.stat-value small { font-size: 12px; font-weight: 400; color: var(--text-muted); margin-left: 2px; }

/* Targets list */
.targets-list { display: flex; flex-direction: column; gap: 8px; }
.target-row {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 12px;
    align-items: center;
    padding: 10px 12px;
    background: var(--bg-elev-1);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: all .2s;
}
.target-row.invalid { opacity: .45; filter: grayscale(.5); }
.target-row.recent  { opacity: .8; }
.target-slot {
    width: 34px; height: 34px; border-radius: 10px;
    display: inline-flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 13px; color: #1e1e2e;
    border: 2px solid rgba(255,255,255,.6);
}
[data-theme="light"] .target-slot { color: #ffffff; }
.target-slot.s1 { background: var(--t1); }
.target-slot.s2 { background: var(--t2); }
.target-slot.s3 { background: var(--t3); }
.target-detail { font-size: 12px; font-family: "JetBrains Mono", "Consolas", monospace; }
.target-detail .status {
    display: inline-block; padding: 2px 8px; border-radius: 999px;
    font-size: 10px; font-weight: 700; margin-bottom: 6px;
    text-transform: uppercase; letter-spacing: .4px;
}
.target-detail .status.detected { background: color-mix(in srgb, var(--status-ok) 25%, transparent); color: var(--accent-green); }
.target-detail .status.recent   { background: color-mix(in srgb, var(--status-warn) 25%, transparent); color: var(--accent-yellow); }
.target-detail .status.free     { background: color-mix(in srgb, var(--text-dim) 20%, transparent); color: var(--text-muted); }
.target-metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 2px 12px; color: var(--text-muted); }
.target-metrics b { color: var(--text); font-weight: 600; }

/* Zones list */
.zones-list { display: flex; flex-direction: column; gap: 8px; }
.zone-row {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 12px;
    align-items: center;
    padding: 10px 12px;
    background: var(--bg-elev-1);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: all .25s;
}
.zone-row.occupied { border-color: var(--accent-green); box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent-green) 20%, transparent); }
.zone-swatch {
    width: 10px; height: 100%; min-height: 36px; border-radius: 6px;
    border: 1.5px solid;
}
.zone-row.occupied .zone-swatch { opacity: 1; }
.zone-swatch.z1 { background: color-mix(in srgb, var(--z1) 30%, transparent); border-color: var(--z1); }
.zone-swatch.z2 { background: color-mix(in srgb, var(--z2) 30%, transparent); border-color: var(--z2); }
.zone-swatch.z3 { background: color-mix(in srgb, var(--z3) 30%, transparent); border-color: var(--z3); }
.zone-row.occupied .zone-swatch.z1 { background: color-mix(in srgb, var(--z1) 65%, transparent); }
.zone-row.occupied .zone-swatch.z2 { background: color-mix(in srgb, var(--z2) 65%, transparent); }
.zone-row.occupied .zone-swatch.z3 { background: color-mix(in srgb, var(--z3) 65%, transparent); }
.zone-info .zone-name { font-weight: 700; font-size: 13px; margin-bottom: 2px; }
.zone-info .zone-coord { font-size: 11px; color: var(--text-muted); font-family: "JetBrains Mono", monospace; }
.zone-badge {
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 11px; font-weight: 700;
    text-transform: uppercase; letter-spacing: .4px;
}
.zone-badge.occupied { background: color-mix(in srgb, var(--status-ok) 25%, transparent); color: var(--accent-green); }
.zone-badge.empty    { background: color-mix(in srgb, var(--text-dim) 20%, transparent); color: var(--text-muted); }

/* Zone editor */
.zone-editor {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px dashed var(--border);
    display: flex; flex-direction: column; gap: 12px;
    animation: slideDown .3s ease;
}
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
}
.editor-title { font-size: 12px; font-weight: 600; color: var(--accent-blue); }
.editor-grid {
    display: flex; flex-direction: column; gap: 12px;
}
.zone-editor-block {
    padding: 10px;
    background: var(--bg-elev-1);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}
.zone-editor-block label {
    font-size: 12px; font-weight: 600; display: block; margin-bottom: 6px;
    color: var(--text);
}
.zone-editor-block .coord-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
}
.zone-editor-block .coord-grid label {
    font-size: 10px; color: var(--text-muted); font-weight: 500; text-transform: uppercase; letter-spacing: .3px;
    margin-bottom: 2px;
}
.zone-editor-block .coord-field { display: flex; flex-direction: column; }
.zone-editor-block input {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 6px 8px;
    font-family: "JetBrains Mono", monospace; font-size: 12px;
    color: var(--text);
    transition: border-color .15s;
}
.zone-editor-block input:focus { outline: none; border-color: var(--accent-blue); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-blue) 20%, transparent); }

.editor-actions { display: flex; gap: 8px; justify-content: flex-end; }
.btn {
    padding: 8px 14px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg-elev-1);
    color: var(--text);
    font-size: 12px; font-weight: 600;
    cursor: pointer;
    transition: all .2s;
}
.btn:hover { transform: translateY(-1px); }
.btn-ghost:hover { background: var(--bg-elev-2); }
.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-mauve));
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 14px color-mix(in srgb, var(--accent-blue) 30%, transparent);
}
.btn-primary:hover { box-shadow: 0 6px 18px color-mix(in srgb, var(--accent-blue) 40%, transparent); }

/* Toast */
.toast-container {
    position: fixed; bottom: 20px; right: 20px;
    display: flex; flex-direction: column; gap: 8px;
    z-index: 9999;
    pointer-events: none;
}
.toast {
    padding: 12px 16px;
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent-blue);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow);
    font-size: 13px; font-weight: 500;
    min-width: 260px;
    animation: toastIn .3s ease, toastOut .3s ease 2.7s forwards;
    pointer-events: auto;
}
.toast.success { border-left-color: var(--accent-green); }
.toast.error   { border-left-color: var(--accent-red); }
.toast.warning { border-left-color: var(--accent-yellow); }
@keyframes toastIn  { from { opacity: 0; transform: translateX(20px); } }
@keyframes toastOut { to   { opacity: 0; transform: translateX(20px); } }