/**
 * PHASE·01 Enhanced — Global Stylesheet
 * Theme: Dark industrial rack-mount aesthetic
 * Responsive breakpoints: 1800, 1200, 1024, 860, 768, 480, 375px
 */

:root {
  --bg: #0b100d; --panel: #131a15; --panel2: #18211b;
  --line: #25302a; --line2: #33423a;
  --txt: #d5e2d6; --dim: #7c8e80; --faint: #4c5c52;
  --amber: #ffb454; --cyan: #4fd8ca; --green: #86e27e;
  --coral: #ff7a5c; --blue: #6fa8ff; --purple: #b39ddb;
  --teal: #5e8c61; --pink: #ff8fab; --orange: #ff9e6b;
  --disp: 'Chakra Petch', 'SF Pro', 'Segoe UI', sans-serif;
  --mono: 'IBM Plex Mono', 'SF Mono', 'Courier New', monospace;
  --body: 'IBM Plex Sans', 'Inter', 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--txt); font-family: var(--body); min-height: 100vh; overflow-x: hidden; }

/* Background texture */
body::before { content: ""; position: fixed; inset: 0; z-index: -2; background:
  repeating-linear-gradient(0deg, rgba(140,180,150,.035) 0 1px, transparent 1px 44px),
  repeating-linear-gradient(90deg, rgba(140,180,150,.035) 0 1px, transparent 1px 44px); }
body::after { content: ""; position: fixed; inset: -20%; z-index: -1; pointer-events: none; background:
  radial-gradient(38% 30% at 12% 6%, rgba(255,180,84,.06), transparent 70%),
  radial-gradient(44% 36% at 88% 94%, rgba(79,216,202,.05), transparent 70%),
  radial-gradient(120% 90% at 50% 50%, transparent 55%, rgba(0,0,0,.55) 100%);
  animation: drift 46s ease-in-out infinite alternate; }

@keyframes drift { to { transform: translate(2.5%,-2%) scale(1.05); } }
@keyframes pulse { 50% { opacity: .5; } }
@keyframes blink { 50% { opacity: .22; } }
@keyframes rise { to { opacity: 1; transform: none; } }
@keyframes attn { 50% { box-shadow: 0 0 12px rgba(255,180,84,.55); border-color: var(--amber); } }
::selection { background: rgba(255,180,84,.28); }

/* Header */
header { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 24px; flex-wrap: wrap;
  padding: 13px clamp(16px,4vw,44px); background: rgba(11,16,13,.88); backdrop-filter: blur(7px);
  border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 14px; margin-right: auto; }
.logo { width: 34px; height: 34px; border: 1px solid var(--amber); position: relative; flex: none; }
.logo::before { content: ""; position: absolute; inset: 5px 5px 12px 5px;
  background: repeating-linear-gradient(90deg, var(--amber) 0 2px, transparent 2px 5px); }
.logo::after { content: ""; position: absolute; left: 5px; right: 5px; bottom: 5px; height: 4px; background: var(--cyan); }
.brand h1 { font: 700 19px/1 var(--disp); letter-spacing: .16em; margin: 0; }
.brand h1 em { font-style: normal; color: var(--amber); }
.brand p { font: 500 9.5px/1 var(--mono); letter-spacing: .26em; color: var(--dim); margin: 6px 0 0; }
.status { display: flex; gap: 8px; flex-wrap: wrap; }
.readout { border: 1px solid var(--line); background: #0e1410; padding: 7px 11px; min-width: 76px; }
.readout label { display: block; font: 500 8.5px/1 var(--mono); letter-spacing: .2em; color: var(--faint); margin-bottom: 5px; }
.readout span { font: 600 13px/1 var(--mono); color: var(--txt); }
.led { display: inline-block; width: 9px; height: 9px; border-radius: 50%; background: #33413a; vertical-align: -1px; transition: background .3s; }
.led.starting { background: var(--amber); animation: blink .5s infinite; }
.led.live { background: var(--green); box-shadow: 0 0 9px var(--green); animation: pulse 1.6s infinite; }
.msg { font: 500 10px/1.4 var(--mono); letter-spacing: .06em; color: var(--coral); max-width: 340px; }
#armBtn { font: 700 12px/1 var(--disp); letter-spacing: .22em; color: var(--amber);
  background: rgba(255,180,84,.08); border: 1px solid var(--amber); padding: 16px 28px; cursor: pointer;
  min-height: 48px; min-width: 120px;
  clip-path: polygon(9px 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%, 0 9px);
  transition: background .2s, box-shadow .2s, color .2s, border-color .2s; }
#armBtn:hover { background: rgba(255,180,84,.18); box-shadow: 0 0 18px -4px rgba(255,180,84,.6); }
#armBtn.live { color: var(--coral); border-color: var(--coral); background: rgba(255,122,92,.1); }
#armBtn:disabled { opacity: .5; cursor: wait; }

/* Scope */
.scope { position: relative; margin: 18px clamp(16px,4vw,44px) 0; height: 176px; overflow: hidden;
  border: 1px solid var(--line); background: linear-gradient(180deg, #0d130f, #0a0f0c); }
.scope canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.hud { position: absolute; top: 8px; font: 500 9px/1 var(--mono); letter-spacing: .2em; color: var(--faint); z-index: 2; }
.hud.l { left: 12px; } .hud.r { right: 12px; letter-spacing: .12em; }
.hud .k-in { color: #93ad99; } .hud .k-out { color: #9df0b4; }
.corner { position: absolute; width: 10px; height: 10px; border: 1px solid var(--line2); z-index: 2; }
.c1 { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.c2 { top: -1px; right: -1px; border-left: 0; border-bottom: 0; }
.c3 { bottom: -1px; left: -1px; border-right: 0; border-top: 0; }
.c4 { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }
.no-sig { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; z-index: 3;
  font: 600 13px/1 var(--mono); letter-spacing: .5em; text-indent: .5em; color: var(--faint);
  animation: blink 1.8s infinite; transition: opacity .5s; }
.scope.live .no-sig { opacity: 0; }

/* Rack layout */
.rack-wrap { display: grid; grid-template-columns: minmax(0,2.1fr) minmax(300px,1fr); gap: 22px;
  width: 100%; max-width: 2000px; margin: 0 auto; padding: 20px clamp(16px,4vw,44px) 8px; align-items: start; }
.rack { display: flex; flex-direction: column; gap: 10px; }
.rack-title { font: 600 11px/1 var(--mono); letter-spacing: .24em; color: var(--dim); text-transform: uppercase;
  display: flex; justify-content: space-between; align-items: baseline; gap: 12px; padding: 2px 2px 5px; }
.rack-title span { letter-spacing: .06em; color: var(--faint); text-transform: none; font-weight: 400; }
.chain-note { font: 500 10px/1.8 var(--mono); letter-spacing: .08em; color: var(--faint); padding: 8px 2px 2px; text-transform: uppercase; }
.chain-note b { font-weight: 600; }
.chain-note em { font-style: normal; text-transform: none; color: var(--faint); }

/* Presets */
.preset-row { display: flex; flex-wrap: wrap; gap: 8px; padding: 12px 14px; border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--panel2), var(--panel)); border-radius: 4px;
  opacity: 0; transform: translateY(12px); animation: rise .5s cubic-bezier(.2,.7,.2,1) forwards; }
.preset { font: 600 10.5px/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--dim);
  background: #0e1410; border: 1px solid var(--line2); padding: 10px 14px; cursor: pointer; border-radius: 3px;
  min-height: 44px; min-width: 88px;
  transition: color .18s, border-color .18s, background .18s, box-shadow .18s, transform .08s; }
.preset:hover { color: var(--txt); border-color: var(--dim); transform: translateY(-1px); }
.preset:active { transform: translateY(0); }
.preset.active { color: var(--amber); border-color: var(--amber); background: rgba(255,180,84,.1);
  box-shadow: 0 0 12px -3px rgba(255,180,84,.55); }

/* Unit cards */
.unit { position: relative; display: grid; grid-template-columns: 56px minmax(185px,1.05fr) minmax(250px,1.7fr) 88px;
  grid-template-areas: "num id params sw" "lvl lvl lvl lvl"; gap: 13px 16px; align-items: center;
  padding: 15px 20px 13px 14px;
  background: linear-gradient(180deg, var(--panel2), var(--panel)); border: 1px solid var(--line);
  border-left: 3px solid var(--ac); border-radius: 4px;
  opacity: 0; transform: translateY(12px); animation: rise .5s cubic-bezier(.2,.7,.2,1) forwards;
  transition: border-color .25s, box-shadow .25s; }
.unit:hover { border-color: var(--line2); border-left-color: var(--ac); }
.unit.on { border-color: color-mix(in srgb, var(--ac) 38%, var(--line));
  box-shadow: 0 0 20px -8px color-mix(in srgb, var(--ac) 55%, transparent),
  inset 0 0 26px -20px color-mix(in srgb, var(--ac) 45%, transparent); }
.screw { position: absolute; width: 6px; height: 6px; border-radius: 50%; right: 8px;
  background: radial-gradient(circle at 35% 30%, #4a5a50, #1a221c 70%); box-shadow: inset 0 0 2px #000; }
.s1 { top: 7px; } .s2 { bottom: 7px; }
.u-num { grid-area: num; font: 700 36px/1 var(--disp); text-align: center; user-select: none;
  color: color-mix(in srgb, var(--ac) 32%, transparent); }
.u-id { grid-area: id; min-width: 0; }
.u-id h2 { font: 600 15px/1.2 var(--disp); letter-spacing: .1em; text-transform: uppercase; margin: 0 0 5px; }
.u-id p { font: 400 11.5px/1.5 var(--body); color: var(--dim); margin: 0; }
.tag { display: inline-block; font: 600 9px/1 var(--mono); letter-spacing: .12em; color: var(--ac);
  border: 1px solid color-mix(in srgb, var(--ac) 45%, transparent); padding: 2px 5px; border-radius: 2px;
  margin-left: 6px; vertical-align: 1px; }
.u-params { grid-area: params; display: flex; flex-direction: column; gap: 9px; min-width: 0; }
.param { display: grid; grid-template-columns: 48px 1fr 122px; align-items: center; gap: 10px; }
.param label { font: 500 10px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--dim); }
.param output { font: 600 12px/1.25 var(--mono); color: var(--ac); text-align: right; white-space: nowrap; }

/* Range inputs */
input[type=range] { -webkit-appearance: none; appearance: none; width: 100%; height: 24px; background: transparent; cursor: pointer; margin: 0; }
input[type=range]::-webkit-slider-runnable-track { height: 4px; border-radius: 2px;
  background: linear-gradient(to right, var(--ac) var(--fill,50%), #263229 var(--fill,50%)); }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 18px; height: 22px; margin-top: -9px;
  background: #0c120e; border: 2px solid var(--ac); border-radius: 2px; transition: box-shadow .15s, transform .08s; }
input[type=range]:hover::-webkit-slider-thumb { box-shadow: 0 0 10px color-mix(in srgb, var(--ac) 60%, transparent); }
input[type=range]:active::-webkit-slider-thumb { transform: scale(1.1); }
input[type=range]::-moz-range-track { height: 4px; border-radius: 2px; background: #263229; }
input[type=range]::-moz-range-progress { height: 4px; border-radius: 2px; background: var(--ac); }
input[type=range]::-moz-range-thumb { width: 14px; height: 18px; background: #0c120e; border: 2px solid var(--ac); border-radius: 2px; }

/* Switch */
.u-switch { grid-area: sw; display: flex; flex-direction: column; align-items: center; gap: 7px; }
.sw-led { width: 7px; height: 7px; border-radius: 50%; background: #2a362e; transition: background .2s, box-shadow .12s; }
.unit.on .sw-led { background: var(--ac);
  box-shadow: 0 0 calc(5px + 10px*var(--live,0)) color-mix(in srgb, var(--ac) calc(50% + 45%*var(--live,0)), transparent); }
.switch { position: relative; width: 56px; height: 28px; background: #0a0f0c; border: 1px solid var(--line2);
  border-radius: 3px; cursor: pointer; padding: 0; transition: border-color .2s, background .2s, box-shadow .2s; }
.switch .lever { position: absolute; top: 3px; left: 3px; width: 24px; height: 20px; border-radius: 2px;
  background: linear-gradient(180deg, #3a4a40, #232f28); border: 1px solid #4a5a50;
  transition: transform .18s cubic-bezier(.4,1.5,.5,1), background .18s, border-color .18s; }
.switch:hover { border-color: color-mix(in srgb, var(--ac,var(--dim)) 60%, var(--line2)); }
.switch[aria-checked="true"] { border-color: var(--ac,var(--green));
  background: color-mix(in srgb, var(--ac,var(--green)) 14%, #0a0f0c);
  box-shadow: 0 0 10px color-mix(in srgb, var(--ac,var(--green)) 30%, transparent); }
.switch[aria-checked="true"] .lever { transform: translateX(26px); border-color: var(--ac,var(--green));
  background: linear-gradient(180deg, color-mix(in srgb, var(--ac,var(--green)) 85%, #fff 10%),
  color-mix(in srgb, var(--ac,var(--green)) 60%, #000 25%)); }
.switch.attn { animation: attn 1.4s ease-in-out infinite; }
.sw-txt { font: 600 9px/1 var(--mono); letter-spacing: .2em; color: var(--dim); }
.unit.on .sw-txt { color: var(--ac); }

/* Level meter */
.u-level { grid-area: lvl; display: grid; grid-template-columns: 40px 1fr 70px; gap: 10px; align-items: center;
  padding-top: 9px; border-top: 1px dashed color-mix(in srgb, var(--line2) 70%, transparent); }
.lvl-lab { font: 600 8.5px/1 var(--mono); letter-spacing: .16em; color: var(--faint); }
.lvl-bar { height: 5px; background: #0a0f0c; border: 1px solid var(--line); position: relative; overflow: hidden; }
.lvl-bar i { position: absolute; inset: 0 auto 0 0; width: 0%; transition: width .08s linear;
  background: linear-gradient(90deg, color-mix(in srgb, var(--ac) 35%, #1a221c), var(--ac)); }
.u-level output { font: 500 9.5px/1 var(--mono); color: var(--faint); text-align: right; white-space: nowrap; }

/* Master unit */
.unit.master { grid-template-columns: 40px 1fr; grid-template-areas: "num id" "params params"; gap: 14px 16px; }
.unit.master .u-num { font-size: 28px; }
.master-grid { display: flex; flex-direction: column; gap: 13px; }
.mrow { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.mrow.vol { display: grid; grid-template-columns: 32px 1fr 122px; gap: 8px; align-items: center; }
.mrow.vol output { font: 600 11px/1.2 var(--mono); color: var(--dim); text-align: right; white-space: nowrap; }
.mlab { font: 600 9px/1 var(--mono); letter-spacing: .16em; color: var(--dim); }
.warn { font: 400 10px/1.4 var(--body); color: #c9a15e; }
.hint { font: 500 10px/1.4 var(--mono); letter-spacing: .06em; color: #c9a15e; transition: color .3s; }
.hint.ok { color: var(--dim); }
.meter { display: grid; grid-template-columns: 32px 1fr 62px; gap: 8px; align-items: center; flex: 1; min-width: 190px; }
.mbar { height: 8px; background: #0a0f0c; border: 1px solid var(--line); position: relative; overflow: hidden; }
.mbar i { position: absolute; inset: 0 auto 0 0; width: 0%; transition: width .09s linear;
  background: linear-gradient(90deg, #3f7a52, #8ce07a 70%, #d8ffb0); }
.meter output { font: 500 10.5px/1 var(--mono); color: var(--dim); text-align: right; }

/* Buttons */
.btn { font: 600 10.5px/1 var(--mono); letter-spacing: .14em; color: var(--txt); background: #111812;
  border: 1px solid var(--line2); padding: 12px 16px; cursor: pointer; border-radius: 3px;
  min-height: 44px; min-width: 88px;
  transition: border-color .2s, background .2s, box-shadow .2s, transform .05s, color .2s; }
.btn:hover { border-color: var(--dim); background: #161f18; }
.btn:active { transform: translateY(1px); }
.btn.danger:hover { border-color: var(--coral); color: var(--coral); }
.btn.rec { border-color: #ff5470; color: #ff5470; box-shadow: 0 0 12px -4px #ff5470; animation: pulse 1.1s infinite; }
#takes { display: flex; flex-direction: column; gap: 5px; }
#takes a { font: 500 11px/1 var(--mono); color: var(--cyan); text-decoration: none; width: max-content; }
#takes a:hover { text-decoration: underline; }
.stereo-meters { display: flex; gap: 12px; }
.stereo-meter { flex: 1; }
.stereo-meter .mlab { color: var(--purple); }

/* Footer */
footer { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 28px; width: 100%; max-width: 2000px;
  margin: 26px auto 0; padding: 26px clamp(16px,4vw,44px) 44px; border-top: 1px solid var(--line); }
footer h3 { font: 600 11px/1 var(--disp); letter-spacing: .22em; text-transform: uppercase; color: var(--dim); margin: 0 0 10px; }
footer p { font: 400 12px/1.7 var(--body); color: var(--dim); margin: 0; }
footer b { color: var(--txt); font-weight: 600; }

/* Select */
.select-container { position: relative; display: inline-block; }
select { font: 500 10px/1 var(--mono); letter-spacing: .1em; color: var(--txt); background: #0e1410;
  border: 1px solid var(--line2); padding: 8px 24px 8px 10px; cursor: pointer; border-radius: 3px;
  min-height: 44px; min-width: 120px;
  appearance: none; -webkit-appearance: none; -moz-appearance: none;
  transition: border-color .2s, background .2s; }
select:hover { border-color: var(--dim); background: #161f18; }
select option { background: #0e1410; color: var(--txt); }
.select-arrow { position: absolute; right: 8px; top: 50%; transform: translateY(-50%); pointer-events: none;
  font: 600 10px/1 var(--mono); color: var(--dim); }

/* Formant & multi-band grids */
.formant-grid { display: grid; grid-template-columns: 48px 1fr 60px 60px 60px 60px; gap: 10px; align-items: center; }
.formant-grid label { font: 500 10px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--dim); }
.formant-grid output { font: 600 12px/1.25 var(--mono); color: var(--ac); text-align: right; white-space: nowrap; }
.multi-band-item { display: contents; }
.multi-band-item label { font: 500 10px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--dim); }
.multi-band-item input { grid-column: 2; }
.multi-band-item output { grid-column: 3; font: 600 12px/1.25 var(--mono); color: var(--ac); text-align: right; white-space: nowrap; }

/* Focus styles */
.switch:focus-visible, #armBtn:focus-visible, .btn:focus-visible, .preset:focus-visible, input[type=range]:focus-visible {
  outline: 2px solid var(--ac, var(--amber)); outline-offset: 2px; }

/* Responsive */
@media (max-width: 1800px) { .rack-wrap { grid-template-columns: 1fr; } }
@media (max-width: 1200px) { .rack-wrap { grid-template-columns: 1fr; } }
@media (max-width: 1024px) { .rack-wrap { grid-template-columns: 1fr; } }
@media (max-width: 860px) {
  .unit { grid-template-columns: 44px 1fr 84px; grid-template-areas: "num id sw" "num params sw" "lvl lvl lvl"; }
  .unit.master { grid-template-columns: 40px 1fr; grid-template-areas: "num id" "params params"; }
  .u-num { font-size: 26px; }
  .u-params { margin-top: 4px; }
  .formant-grid { grid-template-columns: 48px 1fr; gap: 8px; }
  .formant-grid label { grid-column: 1; }
  .formant-grid input { grid-column: 2; }
  .formant-grid output { display: none; }
  footer { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  html { font-size: 14px; }
  .rack-wrap { grid-template-columns: 1fr; gap: 12px; }
  .unit { grid-template-columns: 48px 1fr 96px; grid-template-areas: "num id sw" "lvl lvl lvl" "params params params"; }
  .unit.master { grid-template-columns: 40px 1fr; grid-template-areas: "num id" "params params"; }
  .u-num { font-size: 24px; }
  .u-params { grid-area: params; grid-column: 1/span 3; }
  .param { grid-template-columns: 60px 1fr 100px; }
  input[type=range] { height: 28px; min-height: 28px; }
  input[type=range]::-webkit-slider-thumb { width: 20px; height: 24px; margin-top: -10px; }
  .switch { width: 60px; height: 30px; }
  .switch .lever { width: 26px; height: 22px; }
  footer { grid-template-columns: 1fr; gap: 20px; }
}
@media (max-width: 480px) {
  html { font-size: 13px; }
  .unit { grid-template-columns: 40px 1fr 80px; grid-template-areas: "num id sw" "lvl lvl lvl" "params params params"; }
  .u-num { font-size: 20px; }
  input[type=range] { height: 32px; min-height: 32px; }
  input[type=range]::-webkit-slider-thumb { width: 24px; height: 28px; margin-top: -12px; }
  .scope { height: 140px; }
  footer { padding: 16px 12px; }
}
@media (hover: none) and (pointer: coarse) {
  input[type=range] { height: 32px; min-height: 32px; }
  input[type=range]::-webkit-slider-thumb { width: 24px; height: 28px; margin-top: -12px; }
  .switch { width: 64px; height: 32px; }
  .switch .lever { width: 28px; height: 24px; }
}