@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;700&display=swap');

:root {
  --canvas:           #fafafa;
  --surface-soft:     #f4f4f4;
  --surface-card:     #efefef;
  --surface-elevated: #e8e8e8;
  --carbon-gray:      #dedede;
  --hairline:         #d4d4d4;
  --hairline-strong:  #c4c4c4;
  --ink:              #0a0a0a;
  --body:             #2a2a2a;
  --body-strong:      #111111;
  --muted:            #888888;
  --m-blue-light:     #C0E1D2;
  --m-blue-dark:      #E8B8B8;
  --m-red:            #DC9B9B;
  --success:          #1a7a48;
  --warning:          #a06010;
  --font: 'BMWTypeNextLatin', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

[data-theme="dark"] {
  --canvas:           #000000;
  --surface-soft:     #0d0d0d;
  --surface-card:     #1a1a1a;
  --surface-elevated: #262626;
  --carbon-gray:      #2b2b2b;
  --hairline:         #3c3c3c;
  --hairline-strong:  #262626;
  --ink:              #ffffff;
  --body:             #bbbbbb;
  --body-strong:      #e6e6e6;
  --muted:            #7e7e7e;
  --m-blue-light:     #C0E1D2;
  --m-blue-dark:      #E8B8B8;
  --m-red:            #DC9B9B;
  --success:          #0fa336;
  --warning:          #f4b400;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font);
  font-weight: 300;
  font-size: 16px;
  line-height: 1.5;
  min-height: 100vh;
  transition: background 0.25s ease, color 0.25s ease;
  scrollbar-gutter: stable;
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--carbon-gray) var(--surface-soft);
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--surface-soft);
  border-left: 1px solid var(--hairline);
}
::-webkit-scrollbar-track:horizontal {
  border-left: none;
  border-top: 1px solid var(--hairline);
}
::-webkit-scrollbar-corner {
  background: var(--surface-soft);
}

::-webkit-scrollbar-thumb {
  background: var(--carbon-gray);
  border: 2px solid var(--surface-soft);
}
::-webkit-scrollbar-thumb:hover  { background: var(--muted); }
::-webkit-scrollbar-thumb:active { background: var(--body);  }

::-webkit-scrollbar-button {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  display: block;
  background-repeat: no-repeat;
  background-position: center;
  background-size: 6px 6px;
}
::-webkit-scrollbar-button:hover  { background-color: var(--surface-elevated); }
::-webkit-scrollbar-button:active { background-color: var(--carbon-gray); }

::-webkit-scrollbar-button:single-button:vertical:decrement {
  height: 12px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 6 6'%3E%3Cpath d='M3 1L0.5 4.5h5z' fill='%23888888'/%3E%3C/svg%3E");
}
::-webkit-scrollbar-button:single-button:vertical:increment {
  height: 12px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 6 6'%3E%3Cpath d='M3 5L0.5 1.5h5z' fill='%23888888'/%3E%3C/svg%3E");
}
::-webkit-scrollbar-button:single-button:horizontal:decrement {
  width: 12px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 6 6'%3E%3Cpath d='M1 3L4.5 0.5v5z' fill='%23888888'/%3E%3C/svg%3E");
}
::-webkit-scrollbar-button:single-button:horizontal:increment {
  width: 12px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 6 6'%3E%3Cpath d='M5 3L1.5 0.5v5z' fill='%23888888'/%3E%3C/svg%3E");
}

[data-theme="dark"] ::-webkit-scrollbar-button:single-button:vertical:decrement {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 6 6'%3E%3Cpath d='M3 1L0.5 4.5h5z' fill='%237e7e7e'/%3E%3C/svg%3E");
}
[data-theme="dark"] ::-webkit-scrollbar-button:single-button:vertical:increment {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 6 6'%3E%3Cpath d='M3 5L0.5 1.5h5z' fill='%237e7e7e'/%3E%3C/svg%3E");
}
[data-theme="dark"] ::-webkit-scrollbar-button:single-button:horizontal:decrement {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 6 6'%3E%3Cpath d='M1 3L4.5 0.5v5z' fill='%237e7e7e'/%3E%3C/svg%3E");
}
[data-theme="dark"] ::-webkit-scrollbar-button:single-button:horizontal:increment {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 6 6'%3E%3Cpath d='M5 3L1.5 0.5v5z' fill='%237e7e7e'/%3E%3C/svg%3E");
}

.m-stripe {
  height: 4px;
  background: linear-gradient(to right,
    var(--m-blue-light) 0%,    var(--m-blue-light) 33.33%,
    var(--m-blue-dark)  33.33%, var(--m-blue-dark)  66.66%,
    var(--m-red)        66.66%, var(--m-red)        100%);
  width: 100%;
}

.page { max-width: 1440px; margin: 0 auto; padding: 0 40px; }

.layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: start;
  gap: 0;
}

.layout-left {
  border-right: 1px solid var(--hairline);
  padding-right: 40px;
  min-width: 0;
}

.layout-right {
  padding-left: 40px;
  min-width: 0;
  position: sticky;
  top: 64px;
  max-height: calc(100vh - 64px);
  overflow-y: auto;
}

.results-panel {
  padding: 40px 0 40px;
}

nav {
  height: 64px;
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-logo {
  width: 44px;
  height: 44px;
  color: var(--ink);
  flex-shrink: 0;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-demo {
  height: 36px;
  padding: 0 16px;
  font-size: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
  flex-shrink: 0;
}

.nav-github {
  width: 48px;
  height: 48px;
  border-radius: 9999px;
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  flex-shrink: 0;
}
.nav-github:hover {
  background: var(--surface-elevated);
  border-color: var(--body);
  color: var(--ink);
}
.nav-github svg { width: 20px; height: 20px; }

.nav-title {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--ink);
}
.nav-sub {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.5px;
  color: var(--muted);
}

.btn-theme {
  width: 48px;
  height: 48px;
  border-radius: 9999px;
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  color: var(--ink);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
  flex-shrink: 0;
}
.btn-theme:hover {
  background: var(--surface-elevated);
  border-color: var(--body);
  transform: rotate(20deg);
}
.btn-theme svg { width: 20px; height: 20px; }

.section { padding: 40px 0; border-bottom: 1px solid var(--hairline); }

.section-label {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}

.value-card {
  background: var(--surface-card);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.input-row {
  display: flex;
  gap: 12px;
  align-items: stretch;
  flex-wrap: wrap;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
  min-width: 0;
}

.input-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
}

input[type="text"],
input[type="number"] {
  background: var(--surface-elevated);
  color: var(--ink);
  border: 1px solid var(--hairline);
  border-radius: 0;
  padding: 12px 16px;
  height: 48px;
  font-family: var(--font);
  font-size: 16px;
  font-weight: 300;
  outline: none;
  width: 100%;
  transition: border-color 0.15s ease;
  -moz-appearance: textfield;
}
input[type="text"]:focus,
input[type="number"]:focus { border-color: var(--ink); }
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button { -webkit-appearance: none; }
input::placeholder { color: var(--muted); }

.value-display {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  padding-top: 8px;
  border-top: 1px solid var(--hairline);
}
.value-repr {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.repr-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
}
.repr-value {
  font-size: 14px;
  font-weight: 300;
  color: var(--body-strong);
  font-variant-numeric: tabular-nums;
  word-break: break-all;
}
.repr-value.mono {
  font-family: 'Courier New', monospace;
  font-size: 13px;
}

.format-tabs {
  display: flex;
  border-bottom: 1px solid var(--hairline);
  margin-bottom: 16px;
}
.format-tab {
  background: transparent;
  border: none;
  color: var(--muted);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 12px 20px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
  margin-bottom: -1px;
}
.format-tab:hover { color: var(--body-strong); }
.format-tab.active {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

.flags-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 12px;
}

.flags-cols {
  display: grid;
  grid-template-columns: 1fr 1fr 40px;
  gap: 8px;
  padding: 0 0 8px;
  border-bottom: 1px solid var(--hairline);
  margin-bottom: 8px;
}
.col-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
}

.flags-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.flag-row {
  display: grid;
  grid-template-columns: 1fr 1fr 40px;
  gap: 8px;
  align-items: center;
  animation: slideIn 0.2s ease forwards;
}

.flag-value-group {
  display: flex;
  min-width: 0;
}

.flag-fmt-select {
  background: var(--surface-card);
  color: var(--muted);
  border: 1px solid var(--hairline);
  border-right: none;
  border-radius: 0;
  height: 48px;
  padding: 0 6px;
  font-family: var(--font);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  outline: none;
  flex-shrink: 0;
  width: 52px;
  transition: border-color 0.15s, color 0.15s;
  appearance: none;
  -webkit-appearance: none;
  text-align: center;
}
.flag-fmt-select:focus {
  border-color: var(--ink);
  color: var(--ink);
}
.flag-value-group input[type="text"] {
  border-radius: 0;
  min-width: 0;
  flex: 1;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(-12px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes slideOut {
  from { opacity: 1; transform: translateX(0);    max-height: 60px; }
  to   { opacity: 0; transform: translateX(-12px); max-height: 0; padding: 0; margin: 0; }
}

.flag-row.removing {
  animation: slideOut 0.18s ease forwards;
  overflow: hidden;
  pointer-events: none;
}

.btn-remove {
  background: transparent;
  border: 1px solid var(--hairline);
  color: var(--muted);
  width: 40px;
  height: 48px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
  flex-shrink: 0;
  border-radius: 0;
}
.btn-remove:hover {
  border-color: var(--m-red);
  color: var(--m-red);
  background: rgba(226, 39, 24, 0.06);
}

.btn-group {
  display: flex;
  gap: 8px;
}

.btn {
  background: var(--canvas);
  color: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 0;
  padding: 0 32px;
  height: 48px;
  font-family: var(--font);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}
.btn:hover { background: var(--ink); color: var(--canvas); }

.btn-ghost {
  background: transparent;
  color: var(--body);
  border: 1px solid var(--hairline);
}
.btn-ghost:hover {
  background: var(--surface-elevated);
  color: var(--ink);
  border-color: var(--body);
}

.results-panel .section-label { margin-bottom: 24px; }

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}

.result-cell {
  background: var(--surface-soft);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  overflow: hidden;
  transition: background 0.2s ease;
}

.result-cell::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--hairline);
  transition: background 0.2s ease;
}

.result-cell.match { background: var(--surface-card); }
.result-cell.match::before { background: var(--success); }
.result-cell.no-match::before { background: var(--hairline); }

.result-name {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--body-strong);
  transition: color 0.2s;
}
.result-cell.match .result-name { color: var(--ink); }

.result-value {
  font-family: 'Courier New', monospace;
  font-size: 13px;
  font-weight: 400;
  color: var(--muted);
  word-break: break-all;
}

.result-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.2s;
}
.result-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--hairline);
  transition: background 0.2s;
  flex-shrink: 0;
}
.result-cell.match .result-badge { color: var(--success); }
.result-cell.match .dot { background: var(--success); }

.result-bits {
  font-family: 'Courier New', monospace;
  font-size: 11px;
  color: var(--muted);
  line-height: 1.6;
  word-break: break-all;
  transition: color 0.2s;
}
.result-cell.match .result-bits { color: var(--body); }
.bit-on  { color: var(--success) !important; }
.bit-off { color: var(--hairline) !important; }

.empty-state {
  background: var(--surface-soft);
  border: 1px solid var(--hairline);
  padding: 40px 24px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  font-weight: 300;
  letter-spacing: 0.5px;
}

.summary-band {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  padding: 24px;
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
  margin-bottom: 24px;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}
.summary-band.visible { opacity: 1; transform: translateY(0); }

.stat { display: flex; flex-direction: column; gap: 4px; }
.stat-value {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--ink);
}
.stat-value.green { color: var(--success); }
.stat-value.red   { color: var(--m-red); }
.stat-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
}

.parse-error {
  font-size: 12px;
  font-weight: 400;
  color: var(--m-red);
  letter-spacing: 0.5px;
  min-height: 16px;
}

.import-card {
  background: var(--surface-card);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.import-header {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.lang-select {
  background: var(--surface-elevated);
  color: var(--ink);
  border: 1px solid var(--hairline);
  border-radius: 0;
  height: 36px;
  padding: 0 10px;
  font-family: var(--font);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  cursor: pointer;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  flex-shrink: 0;
  transition: border-color 0.15s;
}
.lang-select:focus { border-color: var(--ink); }

.import-hint {
  font-size: 13px;
  font-weight: 300;
  color: var(--muted);
}

.import-hint code {
  font-family: 'Courier New', monospace;
  font-size: 12px;
  background: var(--surface-elevated);
  padding: 1px 5px;
  color: var(--body-strong);
}

.import-textarea {
  background: var(--surface-elevated);
  color: var(--ink);
  border: 1px solid var(--hairline);
  border-radius: 0;
  padding: 12px 16px;
  font-family: 'Courier New', monospace;
  font-size: 13px;
  font-weight: 400;
  line-height: 1.6;
  width: 100%;
  min-height: 120px;
  resize: vertical;
  outline: none;
  transition: border-color 0.15s;
}
.import-textarea:focus { border-color: var(--ink); }
.import-textarea::placeholder { color: var(--muted); opacity: 0.6; }

.import-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.page-footer {
  border-top: 1px solid var(--hairline);
  padding: 24px 40px 40px;
  max-width: 1440px;
  margin: 0 auto;
}
.page-footer p {
  font-size: 13px;
  font-weight: 300;
  color: var(--muted);
  line-height: 1.6;
}
.page-footer strong {
  font-weight: 700;
  color: var(--body);
}
.page-footer code {
  font-family: 'Courier New', monospace;
  font-size: 12px;
  background: var(--surface-card);
  padding: 1px 5px;
  color: var(--body-strong);
}

@media (max-width: 960px) {
  nav  { padding: 0 24px; }
  .page { padding: 0 24px; }

  .layout { grid-template-columns: 1fr; }
  .layout-left  { border-right: none; padding-right: 0; }
  .layout-right {
    padding-left: 0;
    position: static;
    max-height: none;
    overflow-y: visible;
    border-top: 1px solid var(--hairline);
  }
  .results-panel { padding: 32px 0; }

  
  .results-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }

  .page-footer { padding: 24px 0 40px; }
}

@media (max-width: 768px) {
  nav  { padding: 0 16px; }
  .page { padding: 0 16px; }

  
  .section        { padding: 24px 0; }
  .results-panel  { padding: 24px 0; }

  
  .value-card,
  .import-card  { padding: 16px; }

  
  .format-tab { padding: 10px 14px; font-size: 12px; letter-spacing: 1px; }

  
  .flags-header { flex-direction: column; align-items: flex-start; }

  

  
  .btn { padding: 0 20px; font-size: 13px; }
  .flags-header  .btn-group,
  .import-footer .btn-group { width: 100%; }
  .flags-header  .btn-group .btn,
  .import-footer .btn-group .btn { flex: 1; justify-content: center; }

  
  .summary-band { gap: 20px; padding: 16px; }
  .stat-value   { font-size: 24px; }

  
  .results-grid { grid-template-columns: 1fr; }

  
  .page-footer { padding: 20px 0 32px; }

  
  .nav-sub { display: none; }
}

@media (max-width: 480px) {
  nav  { padding: 0 12px; }
  .page { padding: 0 12px; }

  .format-tab { padding: 8px 10px; font-size: 11px; }

  .btn { padding: 0 14px; font-size: 12px; height: 44px; }
  .btn-remove { height: 44px; }
  input[type="text"],
  input[type="number"] { height: 44px; font-size: 15px; }
  .flag-fmt-select { height: 44px; width: 46px; font-size: 10px; }
  .import-textarea { font-size: 12px; min-height: 100px; }

  .summary-band { gap: 12px; }
  .stat-value   { font-size: 20px; }
  .stat-label   { font-size: 11px; }
}