:root {
  --bg: #07131d;
  --panel: rgba(13, 29, 43, 0.82);
  --card: rgba(16, 44, 68, 0.9);
  --border: rgba(144, 201, 233, 0.36);
  --text: #f2fbff;
  --muted: #9dc6de;
  --accent: #49d4ff;
  --accent-2: #7fffad;
  --danger: #ff7f95;
  --shadow: 0 20px 45px rgba(2, 8, 14, 0.58);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 8% 12%, rgba(77, 166, 255, 0.28) 0%, transparent 35%),
    radial-gradient(circle at 90% 14%, rgba(90, 255, 172, 0.22) 0%, transparent 30%),
    radial-gradient(circle at 52% 84%, rgba(255, 148, 105, 0.2) 0%, transparent 36%),
    linear-gradient(150deg, #07111a 0%, #071d2c 42%, #0b0f1d 100%);
  min-height: 100vh;
  padding: 1.25rem;
}

.background-glow {
  position: fixed;
  inset: -10% auto auto -10%;
  width: min(60vw, 680px);
  height: min(60vw, 680px);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(244, 181, 82, 0.24), rgba(244, 181, 82, 0));
  pointer-events: none;
  z-index: -1;
  animation: float 8s ease-in-out infinite alternate;
}

@keyframes float {
  from {
    transform: translate(0, 0) scale(1);
  }
  to {
    transform: translate(25px, 35px) scale(1.05);
  }
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
  margin-bottom: 1rem;
}

.title-wrap h1 {
  margin: 0;
  font-size: clamp(1.4rem, 2.5vw, 2.3rem);
  letter-spacing: 0.03em;
}

.title-wrap p {
  margin: 0.2rem 0 0;
  color: var(--muted);
}

.status {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.86rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.45rem 0.85rem;
  background: rgba(1, 13, 19, 0.72);
}

.layout {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 1rem;
}

.panel {
  background: linear-gradient(160deg, rgba(8, 28, 43, 0.86), rgba(4, 17, 28, 0.82));
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 0.95rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.upload-panel {
  background: linear-gradient(150deg, rgba(16, 53, 74, 0.9), rgba(14, 42, 57, 0.8));
  border-color: rgba(92, 226, 255, 0.52);
}

.filter-panel {
  background: linear-gradient(150deg, rgba(28, 45, 84, 0.86), rgba(18, 32, 61, 0.82));
  border-color: rgba(143, 168, 255, 0.5);
}

.details-panel {
  background: linear-gradient(150deg, rgba(36, 54, 72, 0.86), rgba(20, 35, 52, 0.82));
  border-color: rgba(255, 183, 116, 0.48);
}

.decode-panel {
  background: linear-gradient(150deg, rgba(29, 66, 63, 0.86), rgba(17, 45, 42, 0.82));
  border-color: rgba(109, 255, 205, 0.48);
}

.sim-panel {
  background: linear-gradient(150deg, rgba(68, 38, 70, 0.84), rgba(40, 24, 48, 0.82));
  border-color: rgba(255, 126, 236, 0.48);
  display: flex;
  flex-direction: column;
}

.seo-panel {
  grid-column: span 12;
  background: linear-gradient(150deg, rgba(64, 47, 20, 0.82), rgba(38, 27, 14, 0.82));
  border-color: rgba(255, 191, 97, 0.44);
}

.panel h2 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  letter-spacing: 0.02em;
}

.upload-panel,
.filter-panel,
.details-panel,
.decode-panel,
.sim-panel {
  min-height: 220px;
}

.upload-panel {
  grid-column: span 12;
}

.filter-panel {
  grid-column: span 4;
}

.details-panel {
  grid-column: span 8;
}

.decode-panel,
.sim-panel {
  grid-column: span 6;
}

.dropzone {
  display: grid;
  gap: 0.35rem;
  place-items: center;
  text-align: center;
  border: 1.5px dashed rgba(106, 254, 202, 0.7);
  border-radius: 12px;
  padding: 1.4rem 0.9rem;
  background: linear-gradient(145deg, rgba(21, 74, 96, 0.65), rgba(12, 46, 67, 0.6));
  cursor: pointer;
  transition: border-color 180ms ease, transform 180ms ease;
}

.dropzone:hover,
.dropzone.dragover {
  border-color: var(--accent-2);
  transform: translateY(-1px);
}

.dropzone input {
  display: none;
}

.dropzone strong {
  font-size: 1rem;
}

.dropzone span {
  color: var(--muted);
  font-size: 0.9rem;
}

.upload-actions,
.btn-row {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.7rem;
}

button,
.ghost-btn,
.decode-form button {
  appearance: none;
  border: 0;
  border-radius: 10px;
  padding: 0.55rem 0.8rem;
  font-family: inherit;
  font-weight: 600;
  color: #021018;
  background: linear-gradient(135deg, #ffe38b, #ff9e58);
  cursor: pointer;
}

button:hover,
.decode-form button:hover {
  filter: brightness(1.04);
}

.ghost-btn {
  background: linear-gradient(145deg, rgba(44, 63, 99, 0.78), rgba(31, 46, 74, 0.78));
  color: var(--text);
  border: 1px solid var(--border);
}

#loadDemoBtn {
  color: #021018;
  background: linear-gradient(135deg, #ffe38b, #ff9e58);
  border: 0;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.hint,
.empty-state {
  margin: 0.8rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.seo-panel p {
  margin: 0.45rem 0;
  color: #f7e8d2;
  line-height: 1.55;
}

.seo-grid {
  margin-top: 0.9rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.seo-grid article {
  border: 1px solid rgba(255, 221, 165, 0.32);
  border-radius: 12px;
  padding: 0.75rem;
  background: rgba(53, 36, 16, 0.48);
}

.seo-grid h3 {
  margin: 0 0 0.6rem;
}

.seo-grid ul {
  margin: 0;
  padding-left: 1rem;
}

.legal-links {
  margin: 1rem 0 0.5rem;
  display: flex;
  gap: 0.9rem;
  justify-content: center;
}

.legal-links a {
  color: #ffd89a;
  text-decoration: none;
  border-bottom: 1px dashed rgba(255, 216, 154, 0.45);
}

.legal-links a:hover {
  color: #fff4d6;
}

.legal-page {
  max-width: 960px;
  margin: 1.5rem auto;
}

.legal-content h1 {
  margin-top: 0;
}

.search-wrap {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem;
  margin-bottom: 0.7rem;
}

input {
  background: rgba(6, 18, 30, 0.85);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  padding: 0.55rem 0.65rem;
  font-family: inherit;
}

input::placeholder {
  color: #7ea8c0;
}

#searchCount {
  display: inline-grid;
  place-items: center;
  min-width: 40px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.82rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: linear-gradient(145deg, rgba(18, 31, 61, 0.9), rgba(14, 23, 43, 0.9));
}

.list {
  display: grid;
  gap: 0.55rem;
  max-height: 435px;
  overflow: auto;
  padding-right: 0.2rem;
}

.message-card {
  width: 100%;
  text-align: left;
  display: grid;
  gap: 0.2rem;
  background: linear-gradient(145deg, rgba(37, 63, 101, 0.72), rgba(26, 48, 78, 0.7));
  border: 1px solid transparent;
  color: var(--text);
  padding: 0.65rem;
}

.message-card.active {
  border-color: #9affbc;
  box-shadow: inset 0 0 0 1px rgba(154, 255, 188, 0.35);
}

.message-name {
  font-weight: 700;
  font-size: 0.95rem;
}

.message-meta {
  color: var(--muted);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
}

.message-header {
  display: flex;
  justify-content: space-between;
  gap: 0.6rem;
  margin-bottom: 0.7rem;
}

.message-header h3 {
  margin: 0;
}

.frame-title {
  font-weight: 700;
}

.signal-name {
  font-weight: 600;
}

.badge {
  border: 1px solid var(--border);
  background: linear-gradient(145deg, rgba(68, 53, 22, 0.72), rgba(38, 31, 13, 0.72));
  color: var(--muted);
  padding: 0.3rem 0.55rem;
  border-radius: 999px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
}

.table-wrap {
  overflow: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

th,
td {
  padding: 0.45rem;
  border-bottom: 1px solid rgba(139, 181, 207, 0.2);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--muted);
  font-weight: 600;
}

.mono {
  font-family: "JetBrains Mono", monospace;
}

.decode-form {
  display: grid;
  grid-template-columns: 1fr 1.4fr auto;
  gap: 0.6rem;
  align-items: end;
}

.bit-editor-wrap {
  margin-top: 0.9rem;
  border: 1px solid rgba(139, 181, 207, 0.26);
  border-radius: 12px;
  padding: 0.7rem;
  background: linear-gradient(145deg, rgba(21, 57, 53, 0.62), rgba(14, 41, 39, 0.58));
}

.bit-editor-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 0.55rem;
}

.bit-editor-header h3 {
  margin: 0;
  font-size: 0.9rem;
}

.bit-editor {
  display: grid;
  gap: 0.45rem;
  overflow-x: auto;
}

.bit-row {
  display: grid;
  grid-template-columns: 85px repeat(8, minmax(26px, 1fr));
  gap: 0.34rem;
  align-items: center;
  min-width: 340px;
}

.bit-byte-label {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.75rem;
  color: var(--muted);
}

.bit-btn {
  min-height: 30px;
  padding: 0;
  border-radius: 8px;
  border: 1px solid rgba(127, 211, 255, 0.4);
  background: linear-gradient(145deg, rgba(29, 74, 88, 0.8), rgba(18, 55, 68, 0.8));
  color: #bfe9f8;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.73rem;
}

.bit-btn.on {
  border-color: rgba(126, 255, 158, 0.8);
  background: linear-gradient(135deg, rgba(54, 196, 124, 0.9), rgba(83, 238, 148, 0.9));
  color: #032015;
}

.decode-form label,
.sim-controls label {
  display: grid;
  gap: 0.32rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.sim-controls {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
  align-items: end;
}

.sim-feed {
  margin-top: 0.8rem;
  flex: 1;
  min-height: 260px;
  overflow: auto;
  display: grid;
  gap: 0.5rem;
  align-content: start;
}

.feed-item {
  border: 1px solid rgba(255, 146, 228, 0.45);
  background: linear-gradient(145deg, rgba(70, 25, 64, 0.66), rgba(43, 16, 45, 0.66));
  border-radius: 10px;
  padding: 0.55rem;
  font-size: 0.84rem;
}

.feed-item strong {
  font-family: "JetBrains Mono", monospace;
  color: #ffc6f3;
}

.kv {
  color: var(--muted);
  font-size: 0.8rem;
}

.error {
  color: var(--danger);
}

@media (max-width: 1100px) {
  .upload-panel,
  .filter-panel,
  .details-panel,
  .decode-panel,
  .sim-panel {
    grid-column: span 12;
  }

  .decode-form,
  .sim-controls,
  .seo-grid {
    grid-template-columns: 1fr;
  }
}