/* SUBCH-808 - on top of the hub's vaporwave stylesheet (../style.css).
   The shape is a TR-808: a dark top panel of knob groups with a pad each, and under it
   the sixteen step buttons in four colour groups (the 808's red / orange / yellow / white,
   here pink / purple / cyan / yellow), one row per instrument, LEDs that chase the step. */
.synth-page main { max-width: 1280px; }
.intro { margin-top: 10px; }
.title { font: 400 44px/1.05 var(--f-display); margin: 6px 0 8px; text-shadow: 0 0 18px #ff71ce44; background: linear-gradient(90deg, #fff 0%, var(--pink) 45%, var(--cyan) 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.title span { font-family: var(--f-neon); font-size: 40px; letter-spacing: .02em; }
.lede { color: var(--muted); font-size: 16px; max-width: 820px; margin: 0; }
.lede b { color: var(--text); }
.block { margin-top: 34px; }
.small { color: var(--faint); font-size: 12px; }
code { font: 12px var(--f-mono); color: var(--yellow); }
.note { color: var(--muted); font-size: 13px; }
.row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.row.actions { margin-top: 14px; }
button { font-family: inherit; }
.btn { border: 0; cursor: pointer; }
.btn.ghost { background: transparent; color: var(--cyan); border: 1px solid var(--line); box-shadow: none; }
.btn.ghost:hover { border-color: var(--cyan); filter: none; }
.btn.small { height: 26px; padding: 0 10px; font-size: 10px; }
.btn.lp.on { background: linear-gradient(90deg, var(--pink), var(--purple)); color: var(--ink); border-color: transparent; box-shadow: 0 0 14px #ff71ce66; }
.g-name.sel { border-color: var(--cyan); box-shadow: inset 3px 0 0 var(--cyan), 0 0 8px #01cdfe55; }
.panelbox { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px; }

/* ---------- the machine ---------- */
.machine {
  margin-top: 16px; border-radius: 12px; overflow: hidden;
  background: linear-gradient(180deg, #17141f 0%, #0e0c14 10%, #0a0910 100%);
  border: 1px solid #2b2540; box-shadow: inset 0 1px 0 #ffffff14, 0 30px 50px #000000aa, 0 0 30px #ff71ce18;
}
.rail { display: flex; align-items: center; gap: 18px; padding: 12px 18px 6px; flex-wrap: wrap; border-bottom: 1px solid #221d33; }
.logo { font: 400 30px/1 var(--f-display); letter-spacing: .06em; color: var(--pink); text-shadow: 0 0 8px #ff71ce99, 0 0 24px #ff71ce44; }
.logo span { color: var(--cyan); text-shadow: 0 0 8px #01cdfe99, 0 0 24px #01cdfe44; }
.logo small { display: block; font-size: 9px; letter-spacing: .34em; color: var(--muted); text-shadow: none; margin-top: 4px; }
.power { display: inline-flex; align-items: center; gap: 8px; background: none; border: 0; cursor: pointer; color: var(--muted); font: 400 10px var(--f-display); letter-spacing: .2em; text-transform: uppercase; padding: 6px 4px; }
.power i { width: 34px; height: 16px; border-radius: 3px; background: #1c1828; border: 1px solid #3a3355; position: relative; box-shadow: inset 0 2px 4px #000; }
.power i::after { content: ""; position: absolute; top: 2px; left: 2px; width: 14px; height: 10px; border-radius: 2px; background: linear-gradient(180deg, #8b82a8, #4b4466); transition: left .12s; }
.power.on i::after { left: 16px; background: linear-gradient(180deg, var(--mint), #05c07a); box-shadow: 0 0 10px var(--mint); }
.power.on { color: var(--mint); }
.rail-stats { display: flex; gap: 16px; margin-left: auto; flex-wrap: wrap; }
.rail-stats div { display: flex; flex-direction: column; }
.rail-stats dt { font: 400 9px var(--f-display); letter-spacing: .16em; text-transform: uppercase; color: var(--faint); }
.rail-stats dd { margin: 1px 0 0; font: 500 12px var(--f-mono); color: var(--cyan); }
.status-line { padding: 6px 18px; color: var(--muted); font-size: 12px; min-height: 1.4em; }

/* the knob panel */
.panel { display: flex; gap: 6px; padding: 8px 12px 10px; align-items: stretch; flex-wrap: wrap; }
.sec { --sc: var(--pink); display: flex; flex-direction: column; background: #0e0c16; border: 1px solid #221d33; border-radius: 6px; min-width: 0; }
.sec-name { margin: 0; }
.sec-name button { width: 100%; border: 0; cursor: help; font: 400 10px var(--f-display); letter-spacing: .22em; text-transform: uppercase; color: var(--ink); background: linear-gradient(90deg, var(--sc), color-mix(in srgb, var(--sc) 55%, #fff)); padding: 4px 10px 3px; border-radius: 5px 5px 0 0; }
.controls { display: flex; gap: 2px; padding: 6px 6px 6px; align-items: flex-end; justify-content: center; flex: 1; }
.ctl { display: flex; flex-direction: column; align-items: center; justify-content: flex-end; gap: 2px; user-select: none; touch-action: none; outline: none; }
.c-label { background: none; border: 0; padding: 1px 2px; cursor: help; color: var(--muted); font: 400 8.5px/1.15 var(--f-display); letter-spacing: .08em; text-transform: uppercase; max-width: 52px; text-align: center; border-radius: 3px; }
.c-label:hover { color: #fff; background: #ffffff10; }
.knob { width: 52px; }
.knob svg { width: 46px; height: 46px; display: block; cursor: ns-resize; filter: drop-shadow(0 3px 5px #000c); }
.k-body { fill: url(#knobGrad); stroke: #05040a; stroke-width: 1.5; }
.k-ptr { stroke: #f6ecff; stroke-width: 3; stroke-linecap: round; }
.k-arc { fill: none; stroke: var(--sc); stroke-width: 2.5; stroke-linecap: round; filter: drop-shadow(0 0 3px var(--sc)); }
.k-val { font: 500 10px var(--f-mono); color: var(--yellow); }
.knob:focus svg { filter: drop-shadow(0 0 6px #01cdfe88); }
.switch .sw2 { display: flex; flex-direction: column; border: 1px solid #2b2540; border-radius: 4px; overflow: hidden; margin-bottom: 4px; }
.sw2 button { background: #171327; border: 0; color: var(--faint); font: 500 10px var(--f-mono); padding: 5px 8px; cursor: pointer; }
.sw2 button.on { background: var(--sc); color: var(--ink); }
/* the pad: the 808's big instrument button, lit by the voice's level */
.pad { --lvl: 0; width: 44px; height: 54px; margin-left: 6px; border-radius: 6px; border: 1px solid #2b2540; cursor: pointer; display: flex; flex-direction: column; align-items: center; justify-content: space-between; padding: 6px 0 5px; background: linear-gradient(180deg, #2a2440, #171327); box-shadow: 0 3px 6px #000a, inset 0 1px 0 #ffffff14; touch-action: none; }
.pad i { width: 9px; height: 9px; border-radius: 50%; background: color-mix(in srgb, var(--sc) calc(var(--lvl) * 100%), #3a3355); box-shadow: 0 0 calc(var(--lvl) * 12px) var(--sc); transition: background .05s; }
.pad span { font: 500 11px var(--f-mono); color: var(--text); }
.pad:active, .pad.hit { transform: translateY(1px); background: linear-gradient(180deg, #3a3355, #201a35); }

/* the sequencer */
.seq { padding: 8px 12px 12px; border-top: 1px solid #221d33; }
.transport { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.transport .lbl { font: 400 9px var(--f-display); letter-spacing: .16em; text-transform: uppercase; color: var(--faint); }
.btn.start { min-width: 90px; justify-content: center; }
.btn.start.on { background: linear-gradient(90deg, var(--mint), var(--cyan)); }
.seg { margin: 0; }
.seg button.on { background: var(--pink); color: var(--ink); box-shadow: 0 0 12px #ff71ce88; }
.seg button.lit { text-shadow: 0 0 8px var(--yellow); color: var(--yellow); }
.seg button.on.lit { color: var(--ink); }
.tempo-box { display: flex; align-items: center; gap: 8px; font: 500 22px var(--f-mono); color: var(--cyan); text-shadow: 0 0 8px #01cdfe99; padding: 2px 10px; background: #060810; border: 1px solid #16304a; border-radius: 6px; }
.tempo-box small { font: 400 9px var(--f-display); letter-spacing: .16em; color: var(--faint); }
.presets { display: flex; gap: 6px; flex-wrap: wrap; margin-left: auto; }
.presets button { background: #171327; border: 1px solid #2b2540; color: var(--muted); border-radius: 6px; padding: 5px 10px; cursor: pointer; font: 400 10px var(--f-display); letter-spacing: .1em; }
.presets button.on { border-color: var(--cyan); color: var(--cyan); box-shadow: 0 0 10px #01cdfe55; }

.grid { display: grid; gap: 3px; }
.g-row { display: grid; grid-template-columns: 44px repeat(16, 1fr); gap: 3px; align-items: stretch; }
.g-row.g-head { margin-bottom: 2px; }
.g-num { text-align: center; font: 500 10px var(--f-mono); color: var(--faint); padding: 2px 0; border-radius: 3px; position: relative; }
.g-num::after { content: ""; display: block; width: 6px; height: 6px; margin: 3px auto 0; border-radius: 50%; background: #3a3355; }
.g-num.cur::after { background: #ff5c5c; box-shadow: 0 0 8px #ff5c5c; }
.g-name { --lvl: 0; background: #171327; border: 1px solid #2b2540; border-radius: 4px; color: var(--text); font: 500 11px var(--f-mono); cursor: pointer; padding: 0; box-shadow: inset 3px 0 0 color-mix(in srgb, var(--pink) calc(var(--lvl) * 100%), #2b2540); }
.g-row.accent .g-name { color: var(--yellow); }
.cell { position: relative; height: 26px; border-radius: 4px; border: 1px solid #2b2540; background: linear-gradient(180deg, #2a2440, #171327); cursor: pointer; padding: 0; box-shadow: 0 2px 3px #000a, inset 0 1px 0 #ffffff10; }
.cell i { position: absolute; left: 50%; top: 4px; width: 6px; height: 6px; margin-left: -3px; border-radius: 50%; background: #3a3355; box-shadow: inset 0 0 2px #000; }
.cell::after { content: ""; position: absolute; left: 5px; right: 5px; bottom: 5px; height: 4px; border-radius: 2px; background: var(--cc); opacity: .55; }
.cell.c-pink { --cc: var(--pink); } .cell.c-purple { --cc: var(--purple); } .cell.c-cyan { --cc: var(--cyan); } .cell.c-yellow { --cc: var(--yellow); }
.g-num.c-pink { color: var(--pink); } .g-num.c-purple { color: var(--purple); } .g-num.c-cyan { color: var(--cyan); } .g-num.c-yellow { color: var(--yellow); }
.cell.on { background: linear-gradient(180deg, color-mix(in srgb, var(--cc) 55%, #171327), color-mix(in srgb, var(--cc) 30%, #171327)); }
.cell.on i { background: var(--cc); box-shadow: 0 0 8px var(--cc); }
.cell.on::after { opacity: 1; }
.cell.cur { outline: 1px solid #fff8; }
.cell.cur.on i { background: #fff; box-shadow: 0 0 10px #fff; }
.g-row.accent .cell { height: 20px; }
.g-row.accent .cell::after { display: none; }

/* under the machine */
.under { display: grid; grid-template-columns: 1.4fr 1fr; gap: 14px; margin-top: 14px; }
.under p { margin: 0; color: var(--muted); font-size: 13px; }
.under p + p { margin-top: 8px; }
.under b { color: var(--text); }
#aboutName { color: var(--pink); }
#aboutVal { font: 500 12px var(--f-mono); color: var(--yellow); margin-left: 8px; }
.display { display: inline-flex; align-items: center; gap: 10px; height: 44px; padding: 0 10px; border-radius: 6px; background: linear-gradient(180deg, #060810, #0a1020); border: 1px solid #16304a; box-shadow: inset 0 0 18px #01cdfe1a; }
.display canvas { width: 120px; height: 34px; }

/* the guide */
.guide { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 28px; }
.g-sec h3 { --sc: var(--cyan); color: var(--sc); margin-top: 14px; }
.g-sec p { color: var(--muted); font-size: 13px; margin: 0 0 8px; }
.g-sec p.circuit { color: var(--text); }
.g-sec b { color: var(--text); font-family: var(--f-display); font-weight: 400; font-size: 11px; letter-spacing: .1em; text-transform: uppercase; margin-right: 4px; }
.how .cols { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.how p { color: var(--muted); font-size: 14px; }
.how h3 { margin-top: 18px; }
.how h3:first-child { margin-top: 0; }

@media (max-width: 900px) {
  .panel { gap: 5px; padding: 6px 8px 8px; }
  .rail { padding: 10px 10px 4px; gap: 10px; }
  .logo { font-size: 22px; }
  .status-line, .seq { padding-left: 8px; padding-right: 8px; }
  .g-row { grid-template-columns: 32px repeat(16, 1fr); gap: 2px; }
  .cell { height: 22px; }
  .cell::after { left: 3px; right: 3px; bottom: 3px; height: 3px; }
  .g-name { font-size: 9px; }
  .presets { margin-left: 0; }
  .display canvas { display: none; }
  .under, .guide, .how .cols { grid-template-columns: 1fr; }
  .title { font-size: 34px; } .title span { font-size: 30px; }
  /* the grid first on a phone: the knobs stack tall below it */
  .machine { display: flex; flex-direction: column; }
  .rail { order: -3; } .status-line { order: -2; } .seq { order: -1; border-top: 0; border-bottom: 1px solid #221d33; }
}