/**
 * Fretonic Next neck — tokens and discs from design-tokens.css / design-system.css / fretboard-neck.css
 * Scoped under .ft-neck so the marketing page stays light.
 */

.ft-neck {
  --degree-1: #1a5f4a;
  --degree-2: #3a6872;
  --degree-3: #c09a48;
  --degree-4: #5c527a;
  --degree-5: #275690;
  --degree-6: #b47a2c;
  --degree-7: #a04650;
  --degree-1-rgb: 26, 95, 74;
  --degree-2-rgb: 58, 104, 114;
  --degree-3-rgb: 192, 154, 72;
  --degree-4-rgb: 92, 82, 122;
  --degree-5-rgb: 39, 86, 144;
  --degree-6-rgb: 180, 122, 44;
  --degree-7-rgb: 160, 70, 80;
  --degree-1-glow: rgba(var(--degree-1-rgb), 0.28);
  --degree-2-glow: rgba(var(--degree-2-rgb), 0.16);
  --degree-3-glow: rgba(var(--degree-3-rgb), 0.28);
  --degree-4-glow: rgba(var(--degree-4-rgb), 0.16);
  --degree-5-glow: rgba(var(--degree-5-rgb), 0.28);
  --degree-6-glow: rgba(var(--degree-6-rgb), 0.16);
  --degree-7-glow: rgba(var(--degree-7-rgb), 0.16);
  --degree-1-border: rgba(var(--degree-1-rgb), 0.66);
  --degree-2-border: rgba(var(--degree-2-rgb), 0.52);
  --degree-3-border: rgba(var(--degree-3-rgb), 0.66);
  --degree-4-border: rgba(var(--degree-4-rgb), 0.52);
  --degree-5-border: rgba(var(--degree-5-rgb), 0.66);
  --degree-6-border: rgba(var(--degree-6-rgb), 0.52);
  --degree-7-border: rgba(var(--degree-7-rgb), 0.52);
  --degree-primary-brightness: 1;
  --shadow-disc: 0 2px 7px rgba(0, 0, 0, 0.28);
  --disc-text: #ffffff;
  --str-h: 38px;
  --nut-w: 18px;
  --fb-fret-width: 7.125px;
  --note-disc-size: 34px;
  --inlay-size: 16px;
  --fb-board-top: #2c2c32;
  --fb-board-hi: #1b1b20;
  --fb-board-mid: #101014;
  --fb-board-base: #070709;
  --fb-board-edge: rgba(170, 185, 178, 0.08);
  width: 100%;
}

.ft-neck__stage {
  display: flex;
  align-items: stretch;
  width: 100%;
}

.ft-neck__rail {
  flex-shrink: 0;
  width: 1.7rem;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
  padding: 0.2rem 0;
  background: rgba(99, 102, 241, 0.05);
  border: 1px solid rgba(99, 102, 241, 0.12);
  border-right: none;
  border-radius: 6px 0 0 6px;
}

.ft-neck__string-lab {
  font-size: 0.62rem;
  font-weight: 600;
  color: rgba(210, 214, 255, 0.55);
  line-height: var(--str-h);
  height: var(--str-h);
}

.ft-neck__surface {
  position: relative;
  flex: 1;
  min-width: 0;
  border-radius: 0 12px 12px 0;
  min-height: calc(var(--str-h) * 6 + 6px);
  background:
    repeating-linear-gradient(105deg, transparent 0 7px, rgba(255, 255, 255, 0.012) 7px 8px, transparent 8px 15px),
    radial-gradient(120% 80% at 50% 42%, rgba(255, 255, 255, 0.04) 0%, transparent 55%),
    linear-gradient(180deg, var(--fb-board-top) 0%, var(--fb-board-hi) 22%, var(--fb-board-mid) 55%, var(--fb-board-base) 100%);
  box-shadow:
    inset 0 16px 22px -14px rgba(0, 0, 0, 0.72),
    inset 0 -18px 26px -14px rgba(0, 0, 0, 0.78),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
  border: 1px solid var(--fb-board-edge);
  border-left: none;
  overflow: hidden;
}

.ft-neck__strings,
.ft-neck__frets,
.ft-neck__inlays {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.ft-string {
  position: absolute;
  left: 0;
  right: 0;
  top: calc(var(--str-h) * 0.5 + var(--str) * var(--str-h));
  height: var(--string-h, 2px);
  border-radius: 999px;
  transform: translateY(-50%);
  box-shadow: 0 1.5px 0.5px rgba(0, 0, 0, 0.28), 0 2.5px 2.5px rgba(0, 0, 0, 0.2);
  background:
    repeating-linear-gradient(90deg, rgba(0, 0, 0, 0.14) 0 0.7px, rgba(255, 255, 255, 0.05) 0.7px 1.4px, transparent 1.4px 2.4px),
    linear-gradient(180deg, rgba(214, 208, 196, 0.55), rgba(168, 160, 148, 0.78) 38%, rgba(110, 104, 96, 0.7) 72%, rgba(150, 144, 134, 0.55));
  opacity: 0.88;
}

.ft-string.is-plain {
  background: linear-gradient(180deg, rgba(236, 238, 244, 0.62), rgba(186, 190, 198, 0.82) 45%, rgba(130, 134, 142, 0.65));
  opacity: 0.8;
}

.ft-string--0 { --string-h: 3.15px; }
.ft-string--1 { --string-h: 2.55px; }
.ft-string--2 { --string-h: 2px; }
.ft-string--3 { --string-h: 1.5px; }
.ft-string--4 { --string-h: 1.2px; }
.ft-string--5 { --string-h: 0.95px; }

.ft-fret {
  position: absolute;
  top: 2px;
  bottom: 2px;
  width: var(--fb-fret-width);
  margin-left: calc(var(--fb-fret-width) * -0.5);
  border-radius: 3.75px;
  background: linear-gradient(90deg, rgba(52, 56, 64, 0.98) 0%, rgba(110, 114, 124, 0.94) 12%, rgba(190, 194, 204, 0.96) 30%, rgba(250, 252, 255, 0.99) 48%, rgba(200, 204, 214, 0.95) 62%, rgba(118, 122, 132, 0.94) 80%, rgba(56, 60, 68, 0.98) 100%);
  box-shadow: 1.75px 0 2px rgba(0, 0, 0, 0.5), inset 1.25px 0 0 rgba(255, 255, 255, 0.32), inset -1.25px 0 0 rgba(0, 0, 0, 0.42);
}

.ft-fret--nut {
  left: 0;
  margin-left: 0;
  width: var(--nut-w);
  border-radius: 3px 2px 2px 3px;
  background: linear-gradient(90deg, rgba(148, 142, 132, 0.95), rgba(232, 226, 214, 0.92) 28%, rgba(248, 244, 234, 0.95) 48%, rgba(220, 214, 202, 0.9) 72%, rgba(160, 154, 144, 0.92));
}

.ft-inlay {
  position: absolute;
  width: var(--inlay-size);
  height: var(--inlay-size);
  margin-left: calc(var(--inlay-size) * -0.5);
  border-radius: 50%;
  background: radial-gradient(circle at 30% 26%, rgba(255, 255, 252, 0.95), rgba(236, 228, 214, 0.82) 38%, rgba(196, 184, 164, 0.7) 68%, rgba(150, 140, 122, 0.55));
  box-shadow: 0 0 0 1px rgba(255, 248, 236, 0.35), inset 0 1.5px 2px rgba(255, 255, 255, 0.55);
  opacity: 0.98;
}

.ft-inlay--single { top: calc(50% - var(--inlay-size) * 0.5); }
.ft-inlay--top { top: calc(50% - var(--str-h) * 1.22 - var(--inlay-size) * 0.5); }
.ft-inlay--bottom { top: calc(50% + var(--str-h) * 1.22 - var(--inlay-size) * 0.5); }

.ft-neck__grid {
  position: relative;
  z-index: 5;
  display: grid;
  grid-template-columns: var(--grid-cols);
  grid-template-rows: repeat(6, var(--str-h));
  width: 100%;
  min-height: calc(var(--str-h) * 6);
}

.ft-slot {
  display: flex;
  align-items: center;
  justify-content: center;
}

.ft-neck .note-disc,
.ft-device__legend .note-disc,
.ft-flow .note-disc {
  width: var(--note-disc-size, 34px);
  height: var(--note-disc-size, 34px);
  border-radius: 50%;
  border: 1.5px solid;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  color: var(--disc-text, #fff);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.ft-neck .note-disc .note-letter,
.ft-device__legend .note-disc .note-letter,
.ft-flow .note-disc .note-letter {
  font-size: 0.72rem;
  font-weight: 800;
  line-height: 1;
  color: #fff;
}

.ft-neck .note-disc.shows-dual-label .note-letter { font-size: 0.68rem; }
.ft-neck .note-disc .note-degree {
  font-size: 0.48rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.92);
  margin-top: 1px;
  line-height: 1;
}

.note-disc.schroma-1 {
  background: linear-gradient(165deg, rgba(var(--degree-1-rgb, 26, 95, 74), 0.92), rgba(var(--degree-1-rgb, 26, 95, 74), 0.7) 42%, rgba(var(--degree-1-rgb, 26, 95, 74), 0.48));
  border-color: var(--degree-1-border, rgba(26, 95, 74, 0.66));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.28), inset 0 -3px 5px rgba(0, 0, 0, 0.38), 0 0 7px var(--degree-1-glow, rgba(26, 95, 74, 0.28)), var(--shadow-disc, 0 2px 7px rgba(0,0,0,.28));
  filter: saturate(0.88);
}
.note-disc.schroma-2 {
  background: linear-gradient(165deg, rgba(var(--degree-2-rgb, 58, 104, 114), 0.82), rgba(var(--degree-2-rgb, 58, 104, 114), 0.62) 45%, rgba(var(--degree-2-rgb, 58, 104, 114), 0.44));
  border-color: var(--degree-2-border, rgba(58, 104, 114, 0.52));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.16), inset 0 -2px 4px rgba(0, 0, 0, 0.34), 0 0 4px var(--degree-2-glow, rgba(58, 104, 114, 0.16)), var(--shadow-disc, 0 2px 7px rgba(0,0,0,.28));
  filter: saturate(0.8);
}
.note-disc.schroma-3 {
  background: linear-gradient(165deg, rgba(var(--degree-3-rgb, 192, 154, 72), 0.92), rgba(var(--degree-3-rgb, 192, 154, 72), 0.7) 42%, rgba(var(--degree-3-rgb, 192, 154, 72), 0.48));
  border-color: var(--degree-3-border, rgba(192, 154, 72, 0.66));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.28), inset 0 -3px 5px rgba(0, 0, 0, 0.38), 0 0 7px var(--degree-3-glow, rgba(192, 154, 72, 0.28)), var(--shadow-disc, 0 2px 7px rgba(0,0,0,.28));
  filter: saturate(0.88);
}
.note-disc.schroma-4 {
  background: linear-gradient(165deg, rgba(var(--degree-4-rgb, 92, 82, 122), 0.82), rgba(var(--degree-4-rgb, 92, 82, 122), 0.62) 45%, rgba(var(--degree-4-rgb, 92, 82, 122), 0.44));
  border-color: var(--degree-4-border, rgba(92, 82, 122, 0.52));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.16), inset 0 -2px 4px rgba(0, 0, 0, 0.34), 0 0 4px var(--degree-4-glow, rgba(92, 82, 122, 0.16)), var(--shadow-disc, 0 2px 7px rgba(0,0,0,.28));
  filter: saturate(0.8);
}
.note-disc.schroma-5 {
  background: linear-gradient(165deg, rgba(var(--degree-5-rgb, 39, 86, 144), 0.92), rgba(var(--degree-5-rgb, 39, 86, 144), 0.7) 42%, rgba(var(--degree-5-rgb, 39, 86, 144), 0.48));
  border-color: var(--degree-5-border, rgba(39, 86, 144, 0.66));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.28), inset 0 -3px 5px rgba(0, 0, 0, 0.38), 0 0 7px var(--degree-5-glow, rgba(39, 86, 144, 0.28)), var(--shadow-disc, 0 2px 7px rgba(0,0,0,.28));
  filter: saturate(0.88);
}
.note-disc.schroma-6 {
  background: linear-gradient(165deg, rgba(var(--degree-6-rgb, 180, 122, 44), 0.82), rgba(var(--degree-6-rgb, 180, 122, 44), 0.62) 45%, rgba(var(--degree-6-rgb, 180, 122, 44), 0.44));
  border-color: var(--degree-6-border, rgba(180, 122, 44, 0.52));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.16), inset 0 -2px 4px rgba(0, 0, 0, 0.34), 0 0 4px var(--degree-6-glow, rgba(180, 122, 44, 0.16)), var(--shadow-disc, 0 2px 7px rgba(0,0,0,.28));
  filter: saturate(0.8);
}
.note-disc.schroma-7 {
  background: linear-gradient(165deg, rgba(var(--degree-7-rgb, 160, 70, 80), 0.82), rgba(var(--degree-7-rgb, 160, 70, 80), 0.62) 45%, rgba(var(--degree-7-rgb, 160, 70, 80), 0.44));
  border-color: var(--degree-7-border, rgba(160, 70, 80, 0.52));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.16), inset 0 -2px 4px rgba(0, 0, 0, 0.34), 0 0 4px var(--degree-7-glow, rgba(160, 70, 80, 0.16)), var(--shadow-disc, 0 2px 7px rgba(0,0,0,.28));
  filter: saturate(0.8);
}

.ft-neck--hero { --str-h: 36px; --note-disc-size: 30px; --inlay-size: 14px; }
.ft-neck--hero-zoom { --str-h: clamp(34px, 3.1vw, 48px); --note-disc-size: clamp(30px, 2.7vw, 42px); --inlay-size: 15px; }
.ft-neck--close { --str-h: 48px; --note-disc-size: 40px; --inlay-size: 18px; }
.ft-neck--cinematic { --str-h: 42px; --note-disc-size: 32px; min-width: 1100px; }

@media (max-width: 767px) {
  .ft-neck { --str-h: 30px; --note-disc-size: 24px; --inlay-size: 10px; --fb-fret-width: 5px; }
  .ft-neck .note-disc .note-letter { font-size: 0.52rem; }
  .ft-neck .note-disc .note-degree { font-size: 0.4rem; }
  .ft-neck__rail { width: 1.15rem; }
  .ft-neck__string-lab { font-size: 0.5rem; }
}