/* SP5LOT WebSDR — FlexRadio-style UI
 * Design: based on FlexRadio 6500 SmartSDR + Expert MB1
 */

:root {
  --bg:        #0a1828;
  --panel:     #0f2030;
  --panel2:    #122a40;
  --border:    #1a3548;
  --bezel:     #07111c;
  --cyan:      #00d4ff;
  --cyan-dim:  #006080;
  --green:     #22dd44;
  --amber:     #ffaa00;
  --red:       #ff3344;
  --text:      #e0e8ee;
  --dim:       #6080a0;
  --dim2:      #345066;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Tahoma, sans-serif;
  font-size: 12px;
  overflow: hidden;
}
body { display: flex; flex-direction: column; }
a { color: var(--cyan); text-decoration: none; }

/* ─── HIDDEN WebSDR engine container ─── */
/* Must be visible-but-offscreen for WebSDR JS to initialise canvas + WebSocket */
#websdr-hidden {
  position: fixed;
  left: -2200px;
  top: 0;
  width: 1024px;
  height: 200px;
  overflow: hidden;
  pointer-events: none;
  opacity: 0.001;          /* visible to layout, invisible to user */
}

/* ─── TOPBAR ─── */
#topbar {
  background: linear-gradient(180deg, #0f2438 0%, #0a1828 100%);
  border-bottom: 1px solid var(--border);
  padding: 8px 14px;
  display: flex;
  align-items: center;
  gap: 18px;
  flex-shrink: 0;
  height: 76px;
}
.logo-block { display: flex; flex-direction: column; gap: 2px; min-width: 140px; }
.logo {
  font-size: 18px; font-weight: 700; color: var(--cyan); letter-spacing: 3px;
  text-shadow: 0 0 12px rgba(0,212,255,0.5);
}
.logo-sub { font-size: 9px; color: var(--dim); letter-spacing: 2px; text-transform: uppercase; }

.topbar-logos { display: flex; gap: 14px; align-items: center; padding: 0 16px; }
.topbar-logo {
  height: 60px; width: auto; max-width: 200px; object-fit: contain;
}
.topbar-logo[src*="skyedge"] {
  height: 70px;
}


.freq-box {
  background: var(--bezel);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 6px 18px 4px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  box-shadow: inset 0 2px 6px rgba(0,0,0,.7), 0 0 0 1px rgba(0,212,255,.15);
}
.freq-lcd {
  font-family: "Share Tech Mono", "Courier New", monospace;
  font-size: 38px; font-weight: 400;
  color: var(--cyan);
  letter-spacing: 2px;
  text-shadow: 0 0 6px var(--cyan), 0 0 14px rgba(0,212,255,.5);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.freq-lcd .unit { font-size: 18px; color: var(--dim); margin-left: 8px; letter-spacing: 1px; }
.freq-lcd .digit {
  display: inline-block; padding: 0 1px; cursor: ns-resize; border-radius: 2px;
  transition: background 0.1s, color 0.1s;
}
.freq-lcd .digit:hover {
  background: rgba(0,212,255,0.25); color: #fff; text-shadow: 0 0 8px #fff;
}
.freq-steps { display: flex; gap: 2px; margin-top: 4px; }
.step-btn {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--dim);
  font-family: inherit;
  font-size: 9px;
  letter-spacing: 0.5px;
  padding: 2px 6px;
  border-radius: 2px;
  cursor: pointer;
  min-width: 38px;
}
.step-btn:hover { color: var(--cyan); border-color: var(--cyan-dim); }
.step-btn:active { background: var(--cyan-dim); color: var(--cyan); }

.center-controls {
  display: flex; align-items: center; gap: 16px;
}
.mode-block { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.block-label { font-size: 8px; color: var(--dim); letter-spacing: 2px; text-transform: uppercase; }
.mode-buttons { display: flex; gap: 2px; }
.mode-btn {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--dim);
  font-family: inherit;
  font-size: 11px; font-weight: 600;
  padding: 6px 10px;
  border-radius: 2px;
  cursor: pointer;
  min-width: 42px;
  letter-spacing: 1px;
}
.mode-btn:hover { color: var(--text); border-color: var(--cyan-dim); }
.mode-btn.active {
  background: var(--cyan-dim);
  color: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 8px rgba(0,212,255,.4), inset 0 0 4px rgba(0,212,255,.3);
  text-shadow: 0 0 4px var(--cyan);
}

/* Zoom buttons (topbar) */
.zoom-block { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.zoom-buttons { display: flex; gap: 2px; }
.zoom-btn {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--cyan);
  font-family: inherit;
  font-size: 16px; font-weight: 700;
  padding: 4px 12px;
  border-radius: 2px;
  cursor: pointer;
  min-width: 36px;
  line-height: 1;
}
.zoom-btn:hover { background: rgba(0,212,255,0.1); border-color: var(--cyan-dim); }
.zoom-btn:active { background: var(--cyan-dim); }

/* Selection rectangle (drag-to-zoom) */
#sel-box {
  position: absolute;
  display: none;
  background: rgba(0,212,255,0.15);
  border: 1px solid rgba(0,212,255,0.8);
  box-shadow: 0 0 10px rgba(0,212,255,0.4), inset 0 0 8px rgba(0,212,255,0.15);
  pointer-events: none;
  z-index: 8;
}

.spacer { flex: 1; }
.clock {
  font-family: "Share Tech Mono", monospace;
  font-size: 18px;
  color: var(--cyan);
  text-shadow: 0 0 6px rgba(0,212,255,.5);
  letter-spacing: 2px;
  line-height: 1.1;
  text-align: right;
}
.clock .clock-local { font-size: 18px; color: var(--cyan); }
.clock .clock-utc { font-size: 11px; color: var(--dim); letter-spacing: 1px; }

/* ─── MAIN ─── */
#main { display: flex; flex: 1; min-height: 0; }
#left {
  flex: 1; display: flex; flex-direction: column;
  min-width: 0; background: var(--bg);
  padding: 4px 4px 4px 8px; gap: 4px;
  position: relative;          /* anchor for #vfo-marker */
}

/* Bookmarks bar — above panadapter. Shows bookmark flags only. */
#cv-bookmarks {
  display: block;
  width: 100%;
  height: 18px;
  flex-shrink: 0;
  background: #050b14;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
}

/* Frequency rail — between splitter and waterfall.
 * Shows VFO indicator + passband shading. Drag edges to resize filter. */
#cv-rail {
  display: block;
  width: 100%;
  height: 32px;
  flex-shrink: 0;
  background: linear-gradient(180deg, #0a1828 0%, #07111c 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  cursor: crosshair;
}
#right {
  width: 280px; flex-shrink: 0;
  background: var(--panel);
  border-left: 1px solid var(--border);
  display: flex; flex-direction: column;
}

.section {
  background: var(--bezel);
  border: 1px solid var(--border);
  border-radius: 3px;
  position: relative;
  display: flex;
  flex-direction: column;
}
.section-label {
  font-size: 7px; color: var(--dim); letter-spacing: 1.5px; text-transform: uppercase;
  position: absolute; top: 3px; left: 6px; z-index: 5;
  background: rgba(7,17,28,0.7); padding: 1px 4px; border-radius: 2px;
}
#panadapter { flex: 0 0 30%; min-height: 80px; }
#waterfall  { flex: 1; min-height: 80px; cursor: crosshair; }

/* Drag-to-resize splitter between panadapter and waterfall */
#splitter {
  height: 6px;
  background: var(--border);
  cursor: row-resize;
  flex-shrink: 0;
  position: relative;
  margin: 0 -4px 0 -8px;       /* span full width of #left padding */
  transition: background 0.15s;
}
#splitter:hover { background: var(--cyan-dim); }
#splitter.dragging { background: var(--cyan); }
#splitter::after {
  content: '';
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: 36px; height: 2px;
  background: var(--dim);
  border-radius: 1px;
  pointer-events: none;
}
#splitter:hover::after,
#splitter.dragging::after { background: var(--cyan); box-shadow: 0 0 6px var(--cyan); }
#panadapter canvas, #waterfall canvas { display: block; width: 100%; height: 100%; }

/* ─── RIGHT PANEL ─── */
#smeter { padding: 12px 14px; border-bottom: 1px solid var(--border); }
.smeter-label {
  font-size: 9px; color: var(--dim); letter-spacing: 3px; text-transform: uppercase;
  margin-bottom: 6px; display: flex; justify-content: space-between;
}
.smeter-label .val { color: var(--cyan); font-family: "Share Tech Mono", monospace; }
.smeter-bar {
  height: 14px;
  background: var(--bezel);
  border: 1px solid var(--border);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
}
.smeter-fill {
  height: 100%;
  background: linear-gradient(90deg,
    var(--green) 0%, var(--green) 60%,
    var(--amber) 60%, var(--amber) 80%,
    var(--red) 80%, var(--red) 100%);
  width: 0%;
  box-shadow: 0 0 6px rgba(34,221,68,0.4);
  transition: width 0.15s linear;
}
.smeter-scale {
  display: flex; justify-content: space-between;
  font-size: 8px; color: var(--dim2);
  margin-top: 3px;
  font-family: "Share Tech Mono", monospace;
}

#tabs { display: flex; background: var(--bg); border-bottom: 1px solid var(--border); }
.tab {
  flex: 1; padding: 10px 0; text-align: center;
  font-size: 10px; font-weight: 600; letter-spacing: 2px;
  color: var(--dim); cursor: pointer;
  border-right: 1px solid var(--border); background: var(--bg);
}
.tab:last-child { border-right: none; }
.tab.active {
  background: var(--panel); color: var(--cyan);
  box-shadow: inset 0 -2px 0 var(--cyan);
}

.tab-content {
  padding: 12px 14px;
  flex: 1; display: flex; flex-direction: column; gap: 12px;
  overflow-y: auto;
}
.tab-content.hidden { display: none; }
.row { display: flex; flex-direction: column; gap: 4px; }
.row-label {
  font-size: 9px; color: var(--dim); letter-spacing: 1.5px; text-transform: uppercase;
  display: flex; justify-content: space-between; align-items: center; gap: 8px;
}
.row-label .v { color: var(--cyan); font-family: "Share Tech Mono", monospace; }
input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 4px;
  background: var(--bezel); border: 1px solid var(--border);
  border-radius: 2px; outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 14px; height: 14px;
  background: var(--cyan); border-radius: 50%; cursor: pointer;
  box-shadow: 0 0 6px rgba(0,212,255,0.6);
}
input[type="range"]::-moz-range-thumb {
  width: 14px; height: 14px;
  background: var(--cyan); border-radius: 50%; border: none;
  box-shadow: 0 0 6px rgba(0,212,255,0.6); cursor: pointer;
}

.toggle-row { display: flex; justify-content: space-between; align-items: center; }
.toggle {
  width: 36px; height: 18px;
  background: var(--bezel); border: 1px solid var(--border);
  border-radius: 9px; position: relative; cursor: pointer;
}
.toggle.on { background: var(--cyan-dim); border-color: var(--cyan); }
.toggle::after {
  content: ''; position: absolute; top: 1px; left: 1px;
  width: 14px; height: 14px;
  background: var(--dim); border-radius: 50%; transition: all .2s;
}
.toggle.on::after {
  left: 19px; background: var(--cyan);
  box-shadow: 0 0 6px var(--cyan);
}

.preset-row {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px;
}
.preset-btn {
  background: var(--bezel); border: 1px solid var(--border);
  color: var(--dim); font-family: inherit; font-size: 10px;
  padding: 6px; border-radius: 2px; cursor: pointer; letter-spacing: 0.5px;
}
.preset-btn:hover { color: var(--cyan); border-color: var(--cyan-dim); }
.preset-btn.active {
  background: var(--cyan-dim); color: var(--cyan); border-color: var(--cyan);
}

/* ─── BAND SELECTOR ─── */
.band-block {
  display: flex; flex-direction: column; gap: 4px;
  padding: 0 14px; border-right: 1px solid var(--border);
}
.admin-tag {
  font-size: 8px; color: #ffaa44; letter-spacing: 1px;
  margin-left: 4px; text-transform: none; font-style: italic;
}
.band-buttons { display: flex; gap: 4px; }
.band-btn {
  background: var(--bezel); border: 1px solid var(--border);
  color: var(--dim); font-family: inherit; font-size: 10px;
  padding: 6px 10px; border-radius: 2px; cursor: pointer;
  letter-spacing: 0.5px; min-width: 78px;
}
.band-btn:hover { color: var(--cyan); border-color: var(--cyan-dim); }
.band-btn.active {
  background: var(--cyan-dim); color: var(--cyan);
  border-color: var(--cyan); font-weight: 600;
}
.band-btn:disabled { opacity: 0.4; cursor: wait; }

.autofit-row { display: flex; justify-content: flex-end; margin-bottom: 2px; }
.rec-btn {
  width: 100%;
  background: var(--bezel); border: 1px solid #ff5050;
  color: #ff5050; font-family: inherit; font-size: 14px;
  padding: 10px; border-radius: 3px; cursor: pointer;
  letter-spacing: 3px; font-weight: 600;
}
.rec-btn:hover { background: rgba(255,80,80,0.12); }
.rec-btn.recording {
  background: #ff3030; color: #fff; border-color: #ff5050;
  animation: rec-pulse 1.2s infinite;
}
@keyframes rec-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255,80,80,0.7); }
  50%      { box-shadow: 0 0 0 8px rgba(255,80,80,0); }
}
.autofit-btn {
  background: var(--bezel); border: 1px solid var(--cyan-dim);
  color: var(--cyan); font-family: inherit; font-size: 9px;
  padding: 2px 8px; border-radius: 2px; cursor: pointer;
  letter-spacing: 1px;
}
.autofit-btn:hover { background: var(--cyan-dim); color: var(--text); border-color: var(--cyan); }
.autofit-btn:active { transform: scale(0.96); }

/* ─── BOTTOM STATUS ─── */
#status {
  background: var(--panel); border-top: 1px solid var(--border);
  display: flex; align-items: center; padding: 0 14px;
  height: 26px; flex-shrink: 0;
  font-size: 10px; letter-spacing: 1px; color: var(--dim); gap: 18px;
}
.led { display: inline-flex; align-items: center; gap: 6px; }
.led-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--dim2);
  box-shadow: inset 0 0 2px rgba(0,0,0,0.5);
}
.led.on .led-dot.green {
  background: var(--green);
  box-shadow: 0 0 8px var(--green), inset 0 -1px 2px rgba(0,0,0,0.3);
  animation: blink-green 1.4s ease-in-out infinite;
}
@keyframes blink-green { 50% { opacity: 0.6; } }
.led .led-label { color: var(--text); }
#status .copy { color: var(--dim2); font-size: 9px; }
#status .copy a { color: var(--dim); }

/* ─── SPLASH ─── */
#splash {
  position: fixed; inset: 0; z-index: 99999;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  transition: opacity .6s ease, visibility .6s ease;
}
#splash.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.sp-content {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
}
.sp-logo {
  font-size: 42px; font-weight: 700; color: var(--cyan);
  letter-spacing: 8px;
  text-shadow: 0 0 18px var(--cyan), 0 0 40px rgba(0,212,255,.4);
}
.sp-sub {
  font-size: 11px; color: var(--dim);
  letter-spacing: 4px; text-transform: uppercase;
}
.sp-band {
  font-size: 14px; color: var(--text);
  letter-spacing: 2px; margin: 14px 0 24px 0;
}
#sp-enter-btn {
  background: var(--bezel);
  border: 2px solid var(--cyan);
  color: var(--cyan);
  font-family: inherit; font-size: 16px; font-weight: 600;
  letter-spacing: 8px;
  padding: 14px 56px; cursor: pointer;
  text-shadow: 0 0 6px var(--cyan);
  box-shadow: 0 0 16px rgba(0,212,255,.4), inset 0 0 12px rgba(0,212,255,.08);
  transition: all .2s ease;
  border-radius: 2px;
}
#sp-enter-btn:hover {
  background: rgba(0,212,255,.08);
  box-shadow: 0 0 28px rgba(0,212,255,.7), inset 0 0 18px rgba(0,212,255,.18);
  transform: scale(1.04);
}
#sp-enter-btn:active { transform: scale(.98); }
.sp-hint {
  font-size: 9px; color: var(--dim);
  letter-spacing: 2px; text-transform: uppercase; margin-top: 14px;
}