/* ==========================================================================
   CHIIKAWA DJ CONSOLE - B/W + LIME ACCENT BRUTALIST STYLESHEET
   CONSTRAINTS:
   - Primary: Black (#000000) and White (#ffffff)
   - Accent: Pure Flat Lime Green (#CCFF00) for highlights
   - NO Gradients (linear, radial, conic)
   - NO Shades / Shadows (box-shadow, text-shadow, drop-shadow)
   - NO Outlines (outline: none, border: none)
   - Mobile Portrait & Landscape Fully Responsive
   ========================================================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  border: none !important;
  outline: none !important;
  box-shadow: none !important;
  text-shadow: none !important;
  background-image: none !important;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Arial", "Noto Sans KR", sans-serif;
  user-select: none;
}

:root {
  --c-black: #000000;
  --c-white: #ffffff;
  --c-lime: #CCFF00;
}

body {
  background-color: var(--c-black);
  color: var(--c-white);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  padding: 12px;
  gap: 12px;
}

/* Scrollbar B/W Clean */
::-webkit-scrollbar {
  width: 4px;
  height: 4px;
}
::-webkit-scrollbar-track {
  background: var(--c-black);
}
::-webkit-scrollbar-thumb {
  background: #333333;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--c-white);
}

/* Main Container */
.dj-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 1500px;
  margin: 0 auto;
  width: 100%;
  overflow-x: hidden;
}

/* ==========================================================================
   HEADER & TOP BAR
   ========================================================================== */
.header-bar {
  background-color: var(--c-white);
  color: var(--c-black);
  padding: 14px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.brand-title {
  font-size: 24px;
  font-weight: 900;
  letter-spacing: -0.5px;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 12px;
  line-height: 1;
}

/* Fedora Badge */
.fedora-badge {
  background-color: var(--c-black);
  color: var(--c-white);
  padding: 5px 10px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 28px;
}

.fedora-powered-text {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--c-lime); /* Lime accent for "powered by" */
  white-space: nowrap;
}

.fedora-logo-img {
  height: 14px;
  width: auto;
  display: block;
  object-fit: contain;
}

.top-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.status-indicator {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--c-black);
  padding: 4px 8px;
}

/* Buttons */
.btn {
  background-color: var(--c-black);
  color: var(--c-white);
  padding: 8px 14px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: transform 0.05s ease;
}

.btn:active {
  transform: scale(0.96);
}

.btn-inverted {
  background-color: var(--c-white);
  color: var(--c-black);
}

/* Lime active highlights */
.btn.active,
.btn-toggle.active {
  background-color: var(--c-lime) !important;
  color: var(--c-black) !important;
}

.rec-btn.recording {
  animation: pulse-lime 0.7s infinite alternate;
}

@keyframes pulse-lime {
  0% {
    background-color: var(--c-black);
    color: var(--c-lime);
  }
  100% {
    background-color: var(--c-lime);
    color: var(--c-black);
  }
}

/* ==========================================================================
   DECK GRID: VISUALIZER, DRUM BEAT & FX
   ========================================================================== */
.deck-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.deck-module {
  background-color: var(--c-white);
  color: var(--c-black);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.module-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 6px;
  background-color: var(--c-white);
  color: var(--c-black);
}

.module-title {
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 1.2px;
  text-transform: uppercase;
}

.module-status {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.8px;
  background-color: var(--c-black);
  color: var(--c-lime);
  padding: 2px 6px;
}

/* Visualizer Canvas */
.visualizer-container {
  background-color: var(--c-black);
  width: 100%;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

canvas#visualizer {
  width: 100%;
  height: 100%;
  display: block;
}

/* Beat Machine Controls */
.beat-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 8px;
}

.control-card {
  background-color: var(--c-black);
  color: var(--c-white);
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.control-label {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  display: flex;
  justify-content: space-between;
}

.control-value {
  font-size: 11px;
  font-weight: 900;
  color: var(--c-lime); /* Lime accent for values */
}

/* Sliders */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  background: var(--c-white);
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 18px;
  background: var(--c-lime); /* Lime slider thumb */
  cursor: pointer;
}

/* FX Buttons */
.fx-buttons-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.btn-fx {
  background-color: var(--c-black);
  color: var(--c-white);
  padding: 10px 4px;
  font-size: 10px;
  font-weight: 800;
  text-align: center;
  cursor: pointer;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.btn-fx.active,
.btn-fx:active {
  background-color: var(--c-lime) !important;
  color: var(--c-black) !important;
}

/* Pattern Selectors */
.pattern-select-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.pattern-btn {
  background-color: var(--c-black);
  color: var(--c-white);
  padding: 8px 2px;
  font-size: 10px;
  font-weight: 800;
  text-align: center;
  cursor: pointer;
  text-transform: uppercase;
}

.pattern-btn.active {
  background-color: var(--c-lime) !important;
  color: var(--c-black) !important;
}

/* ==========================================================================
   16-STEP CHIIKAWA SEQUENCER
   ========================================================================== */
.sequencer-module {
  background-color: var(--c-white);
  color: var(--c-black);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.seq-tracks-container {
  display: flex;
  flex-direction: column;
  gap: 6px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.seq-track {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 6px;
  align-items: center;
  min-width: 580px; /* Ensures steps stay nicely aligned on small screens */
}

.seq-track-label {
  background-color: var(--c-black);
  color: var(--c-white);
  padding: 7px 8px;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.seq-steps {
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  gap: 3px;
}

.seq-step {
  aspect-ratio: 1;
  background-color: var(--c-black);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 9px;
  font-weight: 800;
  color: var(--c-white);
  transition: transform 0.05s ease;
}

/* Step active state: Lime fill */
.seq-step.active {
  background-color: var(--c-lime) !important;
  color: var(--c-black) !important;
}

/* Playhead position indicator */
.seq-step.current-step {
  transform: scale(1.18);
  background-color: var(--c-white);
  color: var(--c-black);
  z-index: 2;
}

.seq-step.active.current-step {
  background-color: var(--c-white) !important;
  color: var(--c-black) !important;
}

/* ==========================================================================
   LAUNCHPAD & SOUND GRID
   ========================================================================== */
.sampler-section {
  background-color: var(--c-white);
  color: var(--c-black);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.filter-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.character-tabs {
  display: flex;
  gap: 5px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 2px;
}

.tab-btn {
  background-color: var(--c-black);
  color: var(--c-white);
  padding: 7px 12px;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  cursor: pointer;
  white-space: nowrap;
}

.tab-btn.active {
  background-color: var(--c-lime) !important;
  color: var(--c-black) !important;
}

.pad-stats {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.8px;
  white-space: nowrap;
}

/* Pads Grid */
.pads-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 8px;
}

/* Sound Pad */
.sound-pad {
  background-color: var(--c-black);
  color: var(--c-white);
  padding: 12px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 105px;
  cursor: pointer;
  position: relative;
  transition: transform 0.04s ease;
}

.sound-pad:active,
.sound-pad.playing {
  background-color: var(--c-white) !important;
  color: var(--c-black) !important;
  transform: scale(0.97);
}

.sound-pad.playing .pad-char-tag {
  color: var(--c-black) !important;
  background-color: var(--c-lime);
  padding: 1px 4px;
}

.sound-pad.playing .pad-hotkey {
  background-color: var(--c-black) !important;
  color: var(--c-lime) !important;
}

.sound-pad.is-looping {
  background-color: var(--c-white);
  color: var(--c-black);
}

.sound-pad.is-looping .pad-loop-btn {
  background-color: var(--c-lime) !important;
  color: var(--c-black) !important;
}

.sound-pad.is-looping .pad-hotkey {
  background-color: var(--c-black);
  color: var(--c-white);
}

.pad-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 6px;
}

.pad-char-tag {
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.8px;
  text-transform: uppercase;
}

.pad-hotkey {
  background-color: var(--c-white);
  color: var(--c-black);
  padding: 2px 5px;
  font-size: 9px;
  font-weight: 900;
}

.pad-middle {
  margin: 6px 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.pad-title {
  font-size: 12px;
  font-weight: 900;
  letter-spacing: -0.3px;
  line-height: 1.25;
}

.pad-kana {
  font-size: 10px;
  font-weight: 700;
  opacity: 0.7;
}

.pad-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 4px;
}

.pad-loop-btn {
  background-color: var(--c-white);
  color: var(--c-black);
  padding: 3px 6px;
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.5px;
  cursor: pointer;
}

.pad-wave-indicator {
  display: flex;
  gap: 2px;
  align-items: flex-end;
  height: 12px;
}

.pad-wave-bar {
  width: 3px;
  height: 3px;
  background-color: var(--c-white);
}

.sound-pad.playing .pad-wave-bar {
  background-color: var(--c-lime) !important; /* Lime wave bars */
  animation: wave-bounce 0.22s infinite alternate;
}

.sound-pad.playing .pad-wave-bar:nth-child(2) {
  animation-delay: 0.07s;
}

.sound-pad.playing .pad-wave-bar:nth-child(3) {
  animation-delay: 0.14s;
}

@keyframes wave-bounce {
  0% {
    height: 3px;
  }
  100% {
    height: 12px;
  }
}

/* ==========================================================================
   FOOTER INFO
   ========================================================================== */
.footer-bar {
  background-color: var(--c-white);
  color: var(--c-black);
  padding: 12px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.5px;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.footer-kbd-hints {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.kbd-badge {
  background-color: var(--c-black);
  color: var(--c-white);
  padding: 2px 5px;
  font-size: 9px;
}

/* ==========================================================================
   RESPONSIVE: MOBILE PORTRAIT & LANDSCAPE
   ========================================================================== */

/* 1. Mobile Portrait (Smartphones <= 768px) */
@media (max-width: 768px) {
  body {
    padding: 8px;
    gap: 8px;
  }

  .header-bar {
    padding: 10px 12px;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .brand-section {
    justify-content: space-between;
    width: 100%;
  }

  .brand-title {
    font-size: 20px;
  }

  .fedora-badge {
    height: 24px;
    padding: 3px 8px;
  }

  .fedora-powered-text {
    font-size: 9px;
  }

  .fedora-logo-img {
    height: 12px;
  }

  .top-controls {
    justify-content: space-between;
    width: 100%;
  }

  .top-controls .btn {
    flex: 1;
    padding: 8px;
    font-size: 10px;
  }

  .deck-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .deck-module {
    padding: 10px;
    gap: 10px;
  }

  .visualizer-container {
    height: 60px;
  }

  .beat-controls {
    grid-template-columns: 1fr 1fr;
    gap: 6px;
  }

  /* 2 columns for pads on mobile portrait */
  .pads-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
  }

  .sound-pad {
    padding: 10px;
    min-height: 90px;
  }

  .pad-title {
    font-size: 11px;
  }

  .pad-kana {
    font-size: 9px;
  }

  .seq-track {
    grid-template-columns: 90px 1fr;
    min-width: 500px;
  }

  .seq-track-label {
    font-size: 9px;
    padding: 5px;
  }

  .footer-bar {
    padding: 10px;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}

/* 2. Extra Small Mobile (< 420px) */
@media (max-width: 420px) {
  .brand-title {
    font-size: 18px;
  }

  .beat-controls {
    grid-template-columns: 1fr;
  }

  .pads-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 3. Mobile Landscape (Landscape on phone/tablet <= 550px height) */
@media (orientation: landscape) and (max-height: 550px) {
  body {
    padding: 6px;
    gap: 6px;
  }

  .header-bar {
    padding: 6px 12px;
  }

  .brand-title {
    font-size: 16px;
  }

  .fedora-badge {
    height: 22px;
  }

  .fedora-logo-img {
    height: 11px;
  }

  .deck-grid {
    grid-template-columns: 1fr 1fr;
    gap: 6px;
  }

  .deck-module {
    padding: 8px;
    gap: 6px;
  }

  .visualizer-container {
    height: 45px;
  }

  .sequencer-module {
    padding: 8px;
  }

  .pads-grid {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 6px;
  }

  .sound-pad {
    min-height: 75px;
    padding: 8px;
  }

  .pad-title {
    font-size: 11px;
  }
}