/* ===== Shop ChatGPT Plus - style.css (theme sáng, có trang trí nền + nút) ===== */
@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@400;500;600;700;800&display=swap');

:root{
  --bg:#f5faf8; --card:#ffffff; --card2:#f0f5f2; --line:#e0e8e3;
  --text:#0f2a20; --muted:#5c7268; --brand:#10a37f; --brand-d:#0d8567; --brand-l:#5fd9ae;
  --accent:#8b7cf6; --accent-d:#6a58e0;
  --danger:#d92d2d; --ok:#1f9d55; --warn:#b8770c;
  --radius:16px;
  --shadow-sm:0 2px 8px rgba(16,38,29,.06);
  --shadow-md:0 12px 30px -12px rgba(16,163,127,.28);
}
*{box-sizing:border-box}
body{margin:0;font-family:'Be Vietnam Pro',system-ui,-apple-system,Roboto,Arial,sans-serif;
  color:var(--text);line-height:1.55;min-height:100vh;
  background-color:var(--bg);
  background-image:
    radial-gradient(680px 420px at -5% -10%, rgba(16,163,127,.14), transparent 60%),
    radial-gradient(600px 380px at 108% 0%, rgba(139,124,246,.12), transparent 55%),
    radial-gradient(900px 560px at 50% 115%, rgba(16,163,127,.08), transparent 60%);
  background-attachment:fixed;
  background-repeat:no-repeat;
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1080px;margin:0 auto;padding:0 18px}
h1,h2,h3{font-family:'Be Vietnam Pro',system-ui,sans-serif;letter-spacing:-.01em}

/* topbar */
.topbar{background:rgba(255,255,255,.82);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10;box-shadow:0 2px 10px rgba(0,0,0,.06)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-weight:800;font-size:1.2rem;color:var(--text)}
.brand .logo{color:var(--brand);filter:drop-shadow(0 0 6px rgba(16,163,127,.45))}
.admin-bar{background:#f6faf8;border-bottom-color:#d7ece3}
.nav{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.nav a{color:var(--muted);font-size:.95rem;font-weight:500}
.nav a:hover{color:var(--text);text-decoration:none}
.nav .admin-link{color:var(--warn)}
.btn-ghost{border:1px solid var(--line);padding:7px 14px;border-radius:10px;font-weight:600;
  background:#fff;transition:border-color .15s,transform .15s}
.btn-ghost:hover{border-color:var(--brand);transform:translateY(-1px);text-decoration:none}

/* hero */
.hero{position:relative;padding:52px 0 18px;isolation:isolate;overflow:hidden}
.hero::before{content:"";position:absolute;top:-70px;left:-60px;width:260px;height:260px;
  background:radial-gradient(circle,rgba(16,163,127,.30),transparent 70%);
  filter:blur(6px);z-index:-1;border-radius:50%}
.hero::after{content:"";position:absolute;top:-40px;right:-40px;width:220px;height:220px;
  background:radial-gradient(circle,rgba(139,124,246,.26),transparent 70%);
  filter:blur(6px);z-index:-1;border-radius:50%}
.hero h1{font-size:2.3rem;font-weight:800;margin:0 0 10px;
  background:linear-gradient(100deg,var(--text) 30%,var(--brand-d) 65%,var(--accent-d) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:var(--muted);margin:0;font-size:1.02rem}

/* products */
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px;margin:26px 0}
.product-card{position:relative;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm);
  transition:transform .18s ease,box-shadow .18s ease;overflow:hidden}
.product-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;
  background:linear-gradient(90deg,var(--brand),var(--accent))}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.product-card h3{margin:6px 0 6px}
.product-card .tag{display:inline-block;background:var(--card2);color:var(--brand-d);
  font-size:.78rem;font-weight:600;padding:3px 12px;border-radius:20px;margin-bottom:10px;
  border:1px solid rgba(16,163,127,.18)}
.price{font-size:1.6rem;font-weight:800;color:var(--brand);margin:12px 0 4px}
.stock{margin-bottom:14px;font-weight:600}
.stock.in{color:var(--ok)} .stock.out{color:var(--danger)}

/* buttons */
.btn{position:relative;display:inline-block;color:#fff;border:none;padding:12px 22px;
  border-radius:12px;font-size:.98rem;cursor:pointer;font-weight:700;letter-spacing:.01em;
  background:linear-gradient(135deg,var(--brand-l),var(--brand) 45%,var(--brand-d));
  box-shadow:0 10px 22px -10px rgba(16,163,127,.55), inset 0 1px 0 rgba(255,255,255,.25);
  transition:transform .15s ease,box-shadow .15s ease;overflow:hidden}
.btn::after{content:"";position:absolute;inset:0;
  background:linear-gradient(115deg,transparent 30%,rgba(255,255,255,.35) 48%,rgba(255,255,255,.35) 52%,transparent 70%);
  transform:translateX(-120%);transition:transform .5s ease}
.btn:hover{background:linear-gradient(135deg,var(--brand-l),var(--brand-d) 55%,var(--brand-d));
  transform:translateY(-2px);box-shadow:0 14px 26px -10px rgba(16,163,127,.65), inset 0 1px 0 rgba(255,255,255,.25);
  text-decoration:none}
.btn:hover::after{transform:translateX(120%)}
.btn:active{transform:translateY(0)}
.btn:disabled{background:#c9d2cd;box-shadow:none;color:#7c8c84;cursor:not-allowed}
.btn:disabled::after{display:none}
.btn-sm{display:inline-block;background:var(--card2);color:var(--text);border:1px solid var(--line);
  padding:7px 14px;border-radius:9px;font-size:.85rem;font-weight:600;cursor:pointer;transition:all .15s}
.btn-sm:hover{border-color:var(--brand);color:var(--brand-d);transform:translateY(-1px);text-decoration:none}
.btn-sm.danger,.danger{color:#fff;background:var(--danger);border-color:var(--danger)}

/* cards & forms */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin:20px 0;
  box-shadow:var(--shadow-sm)}
.card h2{margin-top:0}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:20px 0}
.auth-card{position:relative;max-width:420px;margin:40px auto;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-md);overflow:hidden}
.auth-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;
  background:linear-gradient(90deg,var(--brand),var(--accent))}
.auth-card h1{margin-top:0}
.form{display:flex;flex-direction:column;gap:14px;margin-top:8px}
.form label{display:flex;flex-direction:column;gap:6px;font-size:.9rem;color:var(--muted)}
.form input,.form select,.form textarea{background:var(--card2);border:1px solid var(--line);
  color:var(--text);padding:11px 12px;border-radius:9px;font-size:.98rem;font-family:inherit}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--brand)}
.form .checkbox{flex-direction:row;align-items:center;gap:8px;color:var(--text)}
.btn-google{display:flex;align-items:center;justify-content:center;gap:10px;
  background:#fff;color:#3c4043;border:1px solid var(--line);padding:11px 18px;
  border-radius:10px;font-size:.98rem;font-weight:600;width:100%}
.btn-google:hover{background:#f7f7f8;text-decoration:none;border-color:#c9cbd1}
.inline-form{margin-bottom:14px}
.inline-form select{background:var(--card2);border:1px solid var(--line);color:var(--text);
  padding:8px 10px;border-radius:8px}

/* wallet */
.wallet-balance{position:relative;background:linear-gradient(135deg,var(--brand-l),var(--brand) 50%,var(--brand-d));
  color:#fff;padding:24px;border-radius:var(--radius);font-size:1.3rem;margin:18px 0;
  box-shadow:0 14px 30px -14px rgba(16,163,127,.55), inset 0 1px 0 rgba(255,255,255,.25);overflow:hidden}
.wallet-balance::after{content:"";position:absolute;top:-30px;right:-20px;width:140px;height:140px;
  background:radial-gradient(circle,rgba(255,255,255,.22),transparent 70%);border-radius:50%}
.wallet-balance b{font-size:1.5rem}

/* tables */
.table{width:100%;border-collapse:collapse;font-size:.92rem}
.table th,.table td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.table th{color:var(--muted);font-weight:600;font-size:.82rem;text-transform:uppercase;letter-spacing:.03em}
.table code{background:var(--card2);padding:2px 6px;border-radius:6px}
.pos{color:var(--ok)} .neg{color:var(--danger)}

/* badges */
.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:.78rem;
  background:var(--card2);color:var(--muted)}
.badge-pending{background:#fdf1dc;color:var(--warn)}
.badge-approved{background:#e4f7ec;color:var(--ok)}
.badge-rejected{background:#fbe6e6;color:var(--danger)}

/* flash */
.flash{padding:12px 16px;border-radius:10px;margin:14px 0;font-size:.95rem}
.flash-success{background:#e4f7ec;color:#146c3e;border:1px solid #b7e6cb}
.flash-error{background:#fbe6e6;color:#a11f1f;border:1px solid #f2bcbc}
.flash-info{background:#e9f0fc;color:#1d4c9e;border:1px solid #c3d7f5}

/* admin */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px;margin:22px 0}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;color:var(--muted)}
.stat span{display:block;font-size:1.6rem;font-weight:700;color:var(--text);margin-bottom:4px}
.stat.alert span{color:var(--warn)}
.admin-links{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0}
.tabs{display:flex;gap:8px;margin:18px 0}
.tabs a{padding:8px 16px;border-radius:9px;background:var(--card);border:1px solid var(--line);color:var(--muted)}
.tabs a.active{background:var(--brand);color:#fff;border-color:var(--brand)}
.tabs a:hover{text-decoration:none}

/* misc */
.credential{background:#f3f4f6;border:1px solid var(--line);padding:16px;border-radius:10px;
  white-space:pre-wrap;word-break:break-all;color:#0d6b45;font-size:1rem;font-family:monospace}
.muted{color:var(--muted)}
.small{font-size:.84rem}
.footer{border-top:1px solid var(--line);margin-top:40px;padding:24px 0;color:var(--muted);font-size:.9rem}
.footer p{margin:4px 0}

@media(max-width:720px){.grid-2{grid-template-columns:1fr}.topbar-inner{height:auto;padding:10px 0;flex-direction:column;gap:8px}}

/* logo & thông báo (dùng chung cho trang khách + admin) */
.brand{display:flex;align-items:center;gap:8px}
.site-logo{height:30px;width:auto;border-radius:6px;object-fit:contain}
.site-logo-preview{display:block;max-height:70px;width:auto;border-radius:8px;
  border:1px solid var(--line);background:#fff;padding:6px;margin-top:4px}
.site-notice{background:#fff7e0;color:#8a6100;border-bottom:1px solid #f0dca3;
  padding:10px 18px;font-size:.9rem;text-align:center}

/* ================================================================
   Khu vực quản trị: giao diện sang trọng - nền tối, điểm nhấn vàng đồng
   Chỉ áp dụng trong <body class="admin">, không ảnh hưởng giao diện khách.
   ================================================================ */
body.admin{
  --a-line:#3a3220; --a-gold:#d4af37; --a-gold-soft:#e8cf85;
  --a-text:#f2ead8; --a-muted:#b3a687;
  background:
    radial-gradient(1100px 550px at 8% -12%, rgba(212,175,55,.12), transparent 60%),
    radial-gradient(900px 480px at 100% 0%, rgba(212,175,55,.07), transparent 55%),
    linear-gradient(180deg,#0b0c10 0%,#15131a 45%,#100e0b 100%);
  color:var(--a-text);
  min-height:100vh;
}
body.admin a{color:var(--a-gold-soft)}
body.admin .site-notice{background:rgba(212,175,55,.14);color:var(--a-gold-soft);border-color:var(--a-line)}
body.admin .admin-bar{
  background:linear-gradient(180deg,rgba(22,19,14,.95),rgba(14,12,10,.9));
  border-bottom:1px solid var(--a-line);
  backdrop-filter:blur(6px);
}
body.admin .site-logo{border:1px solid var(--a-line);background:rgba(255,255,255,.05)}
body.admin .brand{color:var(--a-gold);letter-spacing:.02em;font-family:Georgia,'Times New Roman',serif;font-size:1.2rem}
body.admin .nav a{color:var(--a-muted)}
body.admin .nav a:hover{color:var(--a-gold-soft)}
body.admin .nav .admin-link{color:var(--a-gold)}
body.admin .btn-ghost{border-color:var(--a-line);color:var(--a-muted)}
body.admin .btn-ghost:hover{border-color:var(--a-gold);color:var(--a-gold-soft)}

body.admin h1{font-family:Georgia,'Times New Roman',serif;color:var(--a-gold-soft);
  letter-spacing:.02em;border-bottom:1px solid var(--a-line);padding-bottom:14px;margin-bottom:22px}
body.admin h2{color:var(--a-gold-soft);font-family:Georgia,'Times New Roman',serif;font-weight:600}

body.admin .card{
  background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.015));
  border:1px solid var(--a-line);
  box-shadow:0 14px 34px -20px rgba(0,0,0,.75), inset 0 1px 0 rgba(255,255,255,.03);
  backdrop-filter:blur(4px);
}
body.admin .form input,body.admin .form select,body.admin .form textarea{
  background:rgba(0,0,0,.28);border:1px solid var(--a-line);color:var(--a-text);
}
body.admin .form input:focus,body.admin .form select:focus,body.admin .form textarea:focus{
  border-color:var(--a-gold);box-shadow:0 0 0 3px rgba(212,175,55,.15);
}
body.admin .form label{color:var(--a-muted)}
body.admin .form input[type=file]{color:var(--a-muted)}
body.admin .site-logo-preview{background:rgba(255,255,255,.06);border-color:var(--a-line)}

body.admin .btn{
  background:linear-gradient(135deg,var(--a-gold),#a9822a);color:#20180a;font-weight:700;
  border:1px solid rgba(0,0,0,.15);
}
body.admin .btn:hover{background:linear-gradient(135deg,#e6cd7d,var(--a-gold))}
body.admin .btn:disabled{background:#4a4536;color:#8b826c}
body.admin .btn-sm{background:rgba(255,255,255,.05);color:var(--a-text);border:1px solid var(--a-line)}
body.admin .btn-sm:hover{border-color:var(--a-gold)}
body.admin .btn-sm.danger,body.admin .danger{background:#7a2323;border-color:#7a2323;color:#f4d4d4}

body.admin .stat{background:rgba(255,255,255,.03);border:1px solid var(--a-line);color:var(--a-muted)}
body.admin .stat span{color:var(--a-gold-soft)}
body.admin .stat.alert span{color:#e0a94a}
body.admin .tabs a{background:rgba(255,255,255,.03);border:1px solid var(--a-line);color:var(--a-muted)}
body.admin .tabs a.active{background:linear-gradient(135deg,var(--a-gold),#a9822a);color:#20180a;border-color:var(--a-gold)}

body.admin .table th{color:var(--a-muted)}
body.admin .table th,body.admin .table td{border-bottom:1px solid var(--a-line)}
body.admin .table code{background:rgba(0,0,0,.3);color:var(--a-gold-soft)}
body.admin .pos{color:#7fe0a8} body.admin .neg{color:#f08a8a}

body.admin .badge{background:rgba(255,255,255,.06);color:var(--a-muted)}
body.admin .badge-pending{background:rgba(184,119,12,.2);color:#e9b968}
body.admin .badge-approved{background:rgba(31,157,85,.18);color:#6fd39a}
body.admin .badge-rejected{background:rgba(217,45,45,.18);color:#f08a8a}

body.admin .muted{color:var(--a-muted)}
body.admin .footer{border-top:1px solid var(--a-line);color:var(--a-muted)}
body.admin .flash-success{background:rgba(31,157,85,.15);color:#7fe0a8;border-color:rgba(31,157,85,.35)}
body.admin .flash-error{background:rgba(217,45,45,.15);color:#f4a5a5;border-color:rgba(217,45,45,.35)}
body.admin .flash-info{background:rgba(29,76,158,.18);color:#9dc0f5;border-color:rgba(29,76,158,.35)}
body.admin .credential{background:rgba(0,0,0,.3);border-color:var(--a-line);color:var(--a-gold-soft)}

/* ---- Nút hỗ trợ nổi (Zalo / Facebook) ---- */
.support-fab{
  position:fixed; right:20px; bottom:20px; z-index:999;
  display:flex; flex-direction:column; gap:12px; align-items:center;
}
.support-fab-btn{
  width:54px; height:54px; border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  color:#fff; box-shadow:0 8px 22px -6px rgba(0,0,0,.4);
  transition:transform .18s ease, box-shadow .18s ease;
  animation:support-fab-pulse 2.4s ease-in-out infinite;
}
.support-fab-btn:hover{
  transform:translateY(-3px) scale(1.06);
  box-shadow:0 12px 26px -6px rgba(0,0,0,.5);
  text-decoration:none;
}
.support-fab-fb{ background:linear-gradient(135deg,#1877f2,#0d5bcc); }
.support-fab-zalo{ background:linear-gradient(135deg,#0091ff,#0068cc); }
@keyframes support-fab-pulse{
  0%,100%{ box-shadow:0 8px 22px -6px rgba(0,0,0,.4); }
  50%{ box-shadow:0 8px 22px -6px rgba(0,0,0,.4), 0 0 0 8px rgba(255,255,255,.08); }
}
@media (max-width:600px){
  .support-fab{ right:14px; bottom:14px; gap:10px; }
  .support-fab-btn{ width:48px; height:48px; }
}