/* =========================================================
   THEME TOKENS
   ========================================================= */
:root{
  --bg: #0a0f17;
  --bg-2: #111827;

  --title: #f3f7ff;
  --text: #d6e0ee;
  --muted: #96a6bb;

  --panel: #131c29;
  --card: #182334;
  --card-hover: #1d2b40;

  --border: rgba(180, 201, 226, 0.14);
  --border-strong: rgba(180, 201, 226, 0.24);

  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --accent-2: #1d4ed8;
  --accentText: #f8fbff;

  --glow: rgba(59, 130, 246, 0.38);
  --glow-soft: rgba(96, 165, 250, 0.18);

  --field-bg: #0f1723;
  --field-bg-2: #162131;
  --field-text: #e8f0fb;
  --field-border: rgba(180, 201, 226, 0.18);

  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.34);
  --shadow-md: 0 12px 24px rgba(0, 0, 0, 0.24);
  --shadow-sm: 0 5px 12px rgba(0, 0, 0, 0.16);

  --radius-xl: 20px;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
}

/* =========================================================
   BASE
   ========================================================= */
*,
*::before,
*::after{
  box-sizing:border-box;
}

html{
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  min-height:100vh;
  font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at top, rgba(59,130,246,.14), transparent 28%),
    radial-gradient(circle at bottom right, rgba(34,211,238,.08), transparent 22%),
    linear-gradient(180deg, #070b12 0%, var(--bg) 40%, var(--bg-2) 100%);
}

img{
  display:block;
  max-width:100%;
  height:auto;
}

a{
  color:var(--accent-hover);
  text-decoration:none;
  transition:color .2s ease, opacity .2s ease;
}

a:hover{
  color:#93c5fd;
}

.container{
  max-width:1100px;
  margin:auto;
  padding:28px 20px;
}

h1,h2,h3,h4,h5,h6{
  margin-top:0;
  color:var(--title);
  line-height:1.2;
  letter-spacing:.01em;
}

h1{
  font-size:2rem;
  margin:8px 0 18px;
}

h2{
  font-size:1.35rem;
  margin:0 0 14px;
}

p{
  margin:0 0 14px;
  color:var(--muted);
  line-height:1.65;
}

strong,
b{
  color:var(--title);
}

/* =========================================================
   TOP BAR
   ========================================================= */
.topbar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:14px;
  margin-bottom:22px;
}

.toggle-bar{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}

.toggle-btn,
.theme-btn{
  appearance:none;
  border:none;
  outline:none;
  cursor:pointer;
  transition:
    background .22s ease,
    border-color .22s ease,
    color .22s ease,
    transform .18s ease,
    box-shadow .22s ease;
}

.toggle-btn{
  padding:10px 16px;
  border-radius:12px;
  border:1px solid var(--border);
  background:linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,0)), var(--card);
  color:var(--text);
  box-shadow:var(--shadow-sm);
}

.toggle-btn:hover{
  background:linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,0)), var(--card-hover);
  border-color:var(--border-strong);
  transform:translateY(-1px);
}

.toggle-btn.active{
  background:linear-gradient(180deg, var(--accent-hover), var(--accent-2));
  color:var(--accentText);
  border-color:rgba(147,197,253,.42);
  box-shadow:
    0 0 0 1px rgba(147,197,253,.18),
    0 10px 26px var(--glow),
    inset 0 1px 0 rgba(255,255,255,.16);
}

.theme-btn{
  padding:10px 13px;
  border-radius:12px;
  border:1px solid var(--border);
  background:var(--panel);
  color:var(--text);
  display:flex;
  gap:8px;
  align-items:center;
  box-shadow:var(--shadow-sm);
}

.theme-btn:hover{
  background:var(--card);
  border-color:var(--border-strong);
  transform:translateY(-1px);
}

/* =========================================================
   PANELS
   ========================================================= */
.section-box{
  position:relative;
  margin-bottom:22px;
  padding:20px;
  border-radius:var(--radius-xl);
  border:1px solid var(--border);
  background:
    linear-gradient(180deg, rgba(255,255,255,.025), rgba(255,255,255,0)),
    var(--panel);
  box-shadow:var(--shadow-lg);
  overflow:hidden;
}

.section-box::before{
  content:"";
  position:absolute;
  inset:0 auto auto 0;
  width:100%;
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(147,197,253,.16), transparent);
  pointer-events:none;
}

/* =========================================================
   GRID
   ========================================================= */
.grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:16px;
}

/* =========================================================
   CARDS
   ========================================================= */
.card{
  border-radius:var(--radius-lg);
  padding:16px;
  border:1px solid var(--border);
  background:
    linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,0)),
    var(--card);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.03),
    var(--shadow-md);
  transition:
    transform .18s ease,
    border-color .2s ease,
    background .2s ease,
    box-shadow .2s ease;
}

.card:hover{
  transform:translateY(-2px);
  background:
    linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,0)),
    var(--card-hover);
  border-color:rgba(147,197,253,.22);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.04),
    0 14px 28px rgba(0,0,0,.26);
}

.card b{
  display:block;
  margin-bottom:8px;
  color:var(--title);
  font-size:1rem;
}

.card p:last-child{
  margin-bottom:0;
}

/* =========================================================
   CHIP / BADGE
   ========================================================= */
.chip{
  float:right;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 12px;
  border-radius:999px;
  font-size:.78rem;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--accentText);
  background:linear-gradient(180deg, var(--accent-hover), var(--accent-2));
  border:1px solid rgba(147,197,253,.35);
  box-shadow:
    0 0 0 1px rgba(147,197,253,.10),
    0 8px 18px rgba(29,78,216,.28),
    inset 0 1px 0 rgba(255,255,255,.14);
}

/* =========================================================
   ECU TOOL
   ========================================================= */
.ecu-wrap{
  margin:14px 0 18px;
  color:var(--text);
}

.ecu-wrap,
.ecu-wrap div,
.ecu-wrap span,
.ecu-wrap label,
.ecu-wrap p,
.ecu-wrap small,
.ecu-wrap strong{
  color:inherit;
}

/* =========================================================
   FORMS
   ========================================================= */
label{
  display:inline-block;
  margin-bottom:6px;
  color:var(--text);
  font-weight:600;
}

input,
select,
textarea{
  width:100%;
  padding:12px 14px;
  outline:none;
  background:var(--field-bg) !important;
  color:var(--field-text) !important;
  border:1px solid var(--field-border) !important;
  border-radius:var(--radius-sm) !important;
  transition:
    border-color .2s ease,
    box-shadow .2s ease,
    background .2s ease;
}

input:hover,
select:hover,
textarea:hover{
  background:var(--field-bg-2) !important;
  border-color:var(--border-strong) !important;
}

input:focus,
select:focus,
textarea:focus{
  background:var(--field-bg-2) !important;
  border-color:rgba(96,165,250,.85) !important;
  box-shadow:
    0 0 0 3px var(--glow-soft),
    0 0 18px rgba(59,130,246,.10) !important;
}

input::placeholder,
textarea::placeholder{
  color:#7d8fa7;
}

/* =========================================================
   BUTTONS
   ========================================================= */
button,
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 16px;
  border-radius:12px;
  border:1px solid transparent;
  cursor:pointer;
  text-decoration:none;
  transition:
    transform .18s ease,
    background .22s ease,
    border-color .22s ease,
    box-shadow .22s ease,
    color .22s ease,
    filter .22s ease;
}

button:hover,
.btn:hover{
  transform:translateY(-1px);
}

.btn-primary{
  position:relative;
  background:linear-gradient(180deg, #60a5fa 0%, #2563eb 100%);
  color:var(--accentText);
  border-color:rgba(147,197,253,.40);
  box-shadow:
    0 0 0 1px rgba(147,197,253,.12),
    0 10px 28px rgba(37,99,235,.34),
    0 0 22px rgba(96,165,250,.18),
    inset 0 1px 0 rgba(255,255,255,.18);
}

.btn-primary:hover{
  background:linear-gradient(180deg, #7ab4fb 0%, #2e6ef0 100%);
  box-shadow:
    0 0 0 1px rgba(147,197,253,.18),
    0 14px 32px rgba(37,99,235,.42),
    0 0 30px rgba(96,165,250,.24),
    inset 0 1px 0 rgba(255,255,255,.22);
  filter:brightness(1.03);
}

.btn-primary:focus{
  outline:none;
  box-shadow:
    0 0 0 4px rgba(96,165,250,.20),
    0 14px 32px rgba(37,99,235,.42),
    0 0 30px rgba(96,165,250,.24),
    inset 0 1px 0 rgba(255,255,255,.22);
}

.btn-secondary{
  background:linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,0)), var(--card);
  color:var(--text);
  border-color:var(--border);
  box-shadow:var(--shadow-sm);
}

.btn-secondary:hover{
  background:linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,0)), var(--card-hover);
  border-color:rgba(147,197,253,.20);
  box-shadow:
    0 8px 20px rgba(0,0,0,.22),
    0 0 16px rgba(59,130,246,.08);
}

/* =========================================================
   TABLES
   ========================================================= */
table{
  width:100%;
  border-collapse:collapse;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:16px;
  overflow:hidden;
}

th,
td{
  padding:13px 14px;
  text-align:left;
  border-bottom:1px solid rgba(255,255,255,.05);
}

th{
  color:var(--title);
  background:rgba(255,255,255,.02);
  font-weight:700;
}

td{
  color:var(--text);
}

tr:hover td{
  background:rgba(96,165,250,.04);
}

/* =========================================================
   HELPERS
   ========================================================= */
.text-muted{
  color:var(--muted) !important;
}

.text-title{
  color:var(--title) !important;
}

.surface{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
}

.hr{
  height:1px;
  border:0;
  background:linear-gradient(90deg, transparent, rgba(147,197,253,.12), transparent);
  margin:18px 0;
}

/* =========================================================
   SCROLLBAR
   ========================================================= */
::-webkit-scrollbar{
  width:10px;
  height:10px;
}

::-webkit-scrollbar-track{
  background:#0d1521;
}

::-webkit-scrollbar-thumb{
  background:#2a3a52;
  border-radius:999px;
}

::-webkit-scrollbar-thumb:hover{
  background:#395174;
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width:768px){
  .container{
    padding:20px 14px;
  }

  .section-box{
    padding:16px;
    border-radius:16px;
  }

  .card{
    padding:14px;
  }

  h1{
    font-size:1.7rem;
  }

  h2{
    font-size:1.2rem;
  }

  .chip{
    float:none;
    margin-top:8px;
  }
}