:root{
  --bg:#f6f7f9;
  --card:#ffffff;
  --text:#111827;
  --muted:#6b7280;
  --border:#e5e7eb;
  --primary:#2563eb;
  --primary-soft:#e0edff;
  --success:#16a34a;
}

*{box-sizing:border-box}

body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial;
  background:var(--bg);
  color:var(--text);
}

/* ===== PAGE CENTER ===== */
.page{
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:32px 16px;
}

/* ===== CARD (KHUNG GIá»®A) ===== */
.card{
  width:100%;
  max-width:720px;           /* 👈 KHÔNG full */
  background:var(--card);
  border-radius:18px;
  padding:28px 30px;
  box-shadow:
    0 8px 24px rgba(0,0,0,.06),
    0 2px 6px rgba(0,0,0,.04); /* 👈 shadow nhẹ, không glow */
}

/* ===== HEADER ===== */
.card h1{
  font-size:26px;
  font-weight:700;
  text-align:center;
  margin:0 0 22px;
}

/* ===== FORM ===== */
.form-group{
  margin-bottom:18px;
}

label{
  display:block;
  font-size:14px;
  font-weight:600;
  margin-bottom:6px;
}

input, textarea{
  width:100%;
  padding:12px 14px;
  border-radius:12px;
  border:1px solid var(--border);
  font-size:15px;
  background:#fff;
  outline:none;
}

textarea{
  min-height:220px;
  resize:vertical;
}

input:focus, textarea:focus{
  border-color:#c7d2fe; /* xanh rất nhạt */
}

/* ===== BUTTON ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 18px;
  border-radius:14px;
  border:none;
  font-size:15px;
  font-weight:600;
  cursor:pointer;
}

.btn-primary{
  background:#2563eb;
  color:#fff;
}

.btn-gray{
  background:#e5e7eb;
  color:#374151;
}

.btn-block{
  width:100%;
}

/* ===== SAVE SUCCESS ===== */
.success{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  color:var(--success);
  font-size:20px;
  font-weight:700;
  margin-bottom:22px;
}

/* ===== LINK BOX (COPY) ===== */
.link-box{
  border:1px solid var(--border);
  border-radius:14px;
  padding:16px;
  margin-bottom:14px;
  background:#fafafa;
  cursor:pointer;
  transition:transform .15s ease, border-color .15s ease, background .15s;
}

.link-title{
  font-weight:600;
  margin-bottom:6px;
}

.link-url{
  font-size:14px;
  color:#2563eb;
  word-break:break-all;
}

/* 👇 HIỆU ỨNG COPY: ZOOM + VIỀN XANH (KHÔNG GLOW) */
.link-box.copied{
  transform:scale(.97);
  border-color:#2563eb;
  background:#eef4ff;
}

/* ===== ACTIONS ===== */
.actions{
  display:flex;
  gap:12px;
  margin-top:22px;
}

.actions .btn{
  flex:1;
}
/* === ADMIN LIGHT FIX (SAFE) === */
.page {
  background: #f6f7f9;
}

.card {
  background: #ffffff;
}

input,
textarea {
  background: #ffffff;
  color: #111827;
}