/* ---------- THEME VARIABLES ---------- */
:root{
  --bg: #0f1425;        /* dark base */
  --bg2:#0f1a33;        /* dark gradient end */
  --panel:#151c34;
  --text:#eaf0ff;
  --muted:#a8b3d6;
  --brand1:#6a5cff;
  --brand2:#00e0ff;
  --ok:#20c997; --warn:#f3a61e; --danger:#ff4757;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
}

[data-theme="light"]{
  --bg:#f6f7fb;         /* light base */
  --bg2:#e9edf8;        /* light gradient end */
  --panel:#ffffff;
  --text:#0f1425;
  --muted:#47546f;
  --shadow: 0 10px 30px rgba(0,0,0,.08);
}

/* ---------- GLOBAL ---------- */
*{ box-sizing:border-box }
html{ background: var(--bg); }
body{
  margin:0;
  color:var(--text);
  background:linear-gradient(180deg, var(--bg), var(--bg2));
  font:16px/1.4 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, sans-serif;
  transition: background .3s ease, color .3s ease;
}
.hidden{ display:none !important; }

/* ---------- TOP / HERO ---------- */
.hero{
  position:sticky; top:0; z-index:9;
  backdrop-filter: blur(8px);
  background: linear-gradient(90deg, rgba(106,92,255,.20), rgba(0,224,255,.15));
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.hero__content{ max-width:1100px; margin:0 auto; padding:16px; display:flex; align-items:center; justify-content:space-between; }
.brand{ display:flex; gap:12px; align-items:center; }
.logo{ width:40px; height:40px; filter: drop-shadow(0 2px 10px rgba(0,224,255,.35)); }
h1{ margin:0; font-size:22px; letter-spacing:.2px }
.subtitle{ margin:0; color:var(--muted); font-size:13px }
.actions{ display:flex; gap:10px }

/* ---------- BUTTONS ---------- */
.btn{
  background:linear-gradient(135deg, var(--brand1), var(--brand2));
  color:#fff; border:none; padding:10px 14px; border-radius:10px;
  box-shadow: var(--shadow); cursor:pointer;
  transition:transform .12s ease, filter .2s ease
}
.btn:hover{ transform: translateY(-1px); filter: brightness(1.05) }
.btn:active{ transform: translateY(1px) }
.btn.outline{ background:transparent; color:var(--text); border:1px solid rgba(255,255,255,.2) }
.btn.small{ padding:6px 10px; font-size:13px }

/* ---------- LAYOUT ---------- */
.container{ max-width:1100px; margin:24px auto; padding:16px }
.grid{ display:grid; grid-template-columns: repeat(3, 1fr); gap:16px }
.span-2{ grid-column: span 2 }
.span-3{ grid-column: span 3 }

/* ---------- CARDS ---------- */
.card{
  background: var(--panel);
  border:1px solid rgba(255,255,255,.08);
  border-radius:16px;
  padding:18px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}
.card h2{ margin:0 0 8px 0 }
p{ color:var(--muted) }

/* ---------- FORMS ---------- */
label{ display:block; margin-bottom:6px; color: var(--muted) }
textarea{
  width:100%; border-radius:12px; border:1px solid rgba(255,255,255,.15);
  padding:12px; color:var(--text); background: rgba(0,0,0,.18);
}
[data-theme="light"] textarea{ background:#f7f9ff; border-color:#cfd7ea }

.select, select{
  background: rgba(0,0,0,.18);
  color:var(--text);
  border:1px solid rgba(255,255,255,.2);
  padding:10px; border-radius:10px;
}
[data-theme="light"] .select, [data-theme="light"] select{
  background:#f7f9ff; border-color:#cfd7ea;
}

.row{ display:flex; gap:10px; align-items:center; margin-top:12px }

/* ---------- RESULTS & BADGES ---------- */
.result{ margin-top:16px; display:grid; gap:12px }
.result.hidden{ display:none }

.section{
  background:rgba(0,0,0,.22);
  border:1px solid rgba(255,255,255,.08);
  border-radius:12px;
  padding:12px;
}
[data-theme="light"] .section{
  background:#ffffff;
  border-color:#e5e9f5;
}

.pill{
  display:inline-block; padding:6px 10px;
  background: rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.1);
  border-radius:999px; margin:4px 6px 0 0; font-size:12px
}
[data-theme="light"] .pill{ background:#eef3ff; border-color:#d5dcf2 }

/* ---------- KPI / DASHBOARD ---------- */
.kpis{ display:grid; grid-template-columns: repeat(4, 1fr); gap:12px }
.kpi{
  background: rgba(0,0,0,.25);
  border:1px solid rgba(255,255,255,.08);
  border-radius:14px; padding:12px; text-align:center
}
.kpi__value{ font-size:28px; font-weight:700 }
.kpi__value.good{ color: var(--ok) }
.kpi__value.warn{ color: var(--warn) }
.kpi__value.danger{ color: var(--danger) }
.kpi__label{ color: var(--muted); font-size:12px }

/* ---------- HISTORY ---------- */
.history .item{
  display:grid; grid-template-columns: 1fr auto; gap:8px;
  padding:12px; border:1px solid rgba(255,255,255,.08);
  border-radius:12px; margin-bottom:10px;
  background: rgba(0,0,0,.15)
}
[data-theme="light"] .history .item{ background:#ffffff; border-color:#e5e9f5 }
.history .small{ color: var(--muted); font-size:12px }

/* ---------- UPLOADER / IMAGE PREVIEW ---------- */
.uploader .dropzone{
  position:relative; border:1.5px dashed rgba(255,255,255,.25);
  border-radius:14px; padding:18px; text-align:center;
  background: rgba(0,0,0,.15); cursor:pointer; transition: background .2s ease, border-color .2s ease;
}
.uploader .dropzone:hover{ background: rgba(0,0,0,.2); }
.uploader .dropzone.drag{ border-color: var(--brand2); }
[data-theme="light"] .uploader .dropzone{ background:#f2f5fb; border-color:#c7d0e8 }
.uploader .dropzone input[type=file]{ position:absolute; inset:0; opacity:0; cursor:pointer }

/* Image preview block */
.img-preview{
  margin-top:12px;
  background: rgba(0,0,0,.10);
  border:1px solid rgba(255,255,255,.12);
  border-radius:12px;
  padding:12px;
  display:flex;
  gap:12px;
  align-items:flex-start;
}
[data-theme="light"] .img-preview{ background:#f7f9ff; border-color:#cfd7ea; }
.img-preview img{
  width:160px; height:120px; object-fit:cover; border-radius:10px;
  border:1px solid rgba(255,255,255,.15);
}
[data-theme="light"] .img-preview img{ border-color:#d5dcf2 }
.img-preview .img-meta{ display:flex; flex-direction:column; gap:8px; color:var(--muted); }

/* ---------- QUIZ small tweaks ---------- */
.quiz-opt:hover{ filter:brightness(1.06) }
.quiz-opt:disabled{ opacity:.9; cursor:not-allowed }

/* ---------- FOOTER ---------- */
.footer{ text-align:center; color: var(--muted); padding:18px }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 900px){
  .grid{ grid-template-columns: 1fr }
  .span-2, .span-3{ grid-column: span 1 }
}