:root {
  --bg: #fafafa;
  --fg: #111;
  --muted: #666;
  --accent: #111;
  --accent-fg: #fff;
  --border: #e5e5e5;
  --card: #fff;
  --side-bg: #f3f3f3;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.55 -apple-system, system-ui, Segoe UI, Roboto, sans-serif; }
a { color: var(--fg); }
.muted { color: var(--muted); }

.topbar { display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px; border-bottom: 1px solid var(--border); background: #fff; }
.topbar .brand { font-weight: 700; font-size: 18px; text-decoration: none; }
.topbar nav a { margin-left: 18px; text-decoration: none; color: var(--muted); font-size: 14px; }
.topbar nav a:hover { color: var(--fg); }
.link-btn { background: none; border: 0; color: var(--muted); cursor: pointer; font-size: 14px; padding: 0; margin-left: 18px; }
.link-btn:hover { color: var(--fg); }

main { max-width: 1080px; margin: 0 auto; padding: 28px 22px 80px; }
.footer { text-align: center; padding: 24px; border-top: 1px solid var(--border); color: var(--muted); font-size: 13px; }

.hero { text-align: center; padding: 44px 16px 28px; }
.hero h1 { font-size: 40px; margin: 0 0 12px; line-height: 1.15; }
.hero p { font-size: 18px; color: var(--muted); margin-bottom: 22px; }
.subscribe-inline { display: inline-flex; gap: 8px; max-width: 420px; width: 100%; }
.subscribe-inline input { flex: 1; padding: 10px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; }
.subscribe-inline button { padding: 10px 16px; background: var(--accent); color: var(--accent-fg); border: 0; border-radius: 6px; cursor: pointer; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 18px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 18px; transition: transform .15s; }
.card:hover { transform: translateY(-2px); }
.card h3 { margin: 0 0 6px; font-size: 17px; }
.card h3 a { text-decoration: none; }
.card .subtitle { color: var(--muted); font-size: 14px; min-height: 42px; margin-bottom: 12px; }
.price-row { display: flex; align-items: baseline; gap: 8px; margin-bottom: 12px; }
.price-row .compare { color: #aaa; text-decoration: line-through; font-size: 14px; }
.price-row .price { font-size: 20px; font-weight: 700; }
.btn, .btn-buy { display: inline-block; padding: 10px 16px; background: var(--accent); color: var(--accent-fg);
  text-decoration: none; border: 0; border-radius: 6px; cursor: pointer; font-size: 14px; font-weight: 600; }
.btn-buy { font-size: 16px; padding: 14px 22px; width: 100%; text-align: center; }
.btn-warn { background: #c00; }
.btn-good { background: #0a7; }

.product-page { max-width: 740px; margin: 0 auto; }
.product-head h1 { font-size: 34px; margin: 0 0 10px; }
.product-head .lead { color: var(--muted); font-size: 17px; }
.price-box { margin: 18px 0; display: flex; align-items: baseline; gap: 10px; }
.price-box .compare { color: #aaa; text-decoration: line-through; font-size: 16px; }
.price-box .price-big { font-size: 32px; font-weight: 800; }
.buy-form { display: grid; gap: 10px; background: #fff; border: 1px solid var(--border); padding: 18px; border-radius: 10px; }
.buy-form input, .buy-form textarea { padding: 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 15px; font-family: inherit; }
.buy-form .small { color: var(--muted); font-size: 12px; text-align: center; margin: 0; }
.preview { margin: 32px 0; padding: 22px; background: #fff; border: 1px solid var(--border); border-radius: 10px; }
.preview h2 { margin-top: 0; }
.cta-bottom { margin-top: 32px; }

.blog-card { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 16px; }
.blog-card h3 { margin: 0 0 8px; }
.blog-card h3 a { text-decoration: none; }
.post { max-width: 720px; margin: 0 auto; }
.post h1 { font-size: 34px; }
.post h2 { margin-top: 32px; }
.post img { max-width: 100%; }
.inline-cta { background: #f3f3f3; border-left: 4px solid var(--accent); padding: 16px 20px; margin: 24px 0; border-radius: 0 8px 8px 0; }

.thanks, .custom-page { max-width: 560px; margin: 40px auto; text-align: center; }
.custom-page textarea { min-height: 140px; }

.login-form { max-width: 360px; margin: 60px auto; display: grid; gap: 10px; }
.login-form label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); text-align: left; }
.login-form input, .login-form select { padding: 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; }
.login-form button { padding: 12px; background: var(--accent); color: var(--accent-fg); border: 0; border-radius: 6px; cursor: pointer; }

/* ============ ADMIN LAYOUT ============ */
.admin-body main { padding: 0; max-width: none; }
.admin-shell { display: grid; grid-template-columns: 200px 1fr; min-height: calc(100vh - 64px); }
.admin-side { background: var(--side-bg); border-right: 1px solid var(--border); padding: 16px 0; }
.admin-tab { display: block; padding: 10px 18px; text-decoration: none; color: var(--fg); font-size: 14px; border-left: 3px solid transparent; }
.admin-tab:hover { background: #ebebeb; }
.admin-tab.active { background: #fff; border-left-color: var(--accent); font-weight: 600; }
.admin-main { padding: 28px 32px; max-width: 1080px; }
.admin-main h1 { margin-top: 0; font-size: 26px; }
.admin-main h2 { font-size: 18px; margin-top: 28px; }
.dash { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin: 20px 0; }
.stat { background: #fff; border: 1px solid var(--border); padding: 16px; border-radius: 8px; }
.stat h3 { margin: 0 0 8px; font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: .5px; }
.stat .big { font-size: 24px; font-weight: 700; margin: 4px 0; }
.stat.critical { border-color: #c00; }
.stat.warning { border-color: #e90; }
.admin-actions { margin: 16px 0; display: flex; gap: 8px; }
.tbl { width: 100%; border-collapse: collapse; margin: 10px 0; background: #fff; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.tbl th, .tbl td { border-bottom: 1px solid #eee; padding: 10px 12px; text-align: left; font-size: 13px; }
.tbl th { background: #fafafa; font-weight: 600; color: var(--muted); }
.tbl tr:last-child td { border-bottom: 0; }
.ok { background: #e7f7ec; border: 1px solid #b8e2c4; color: #1a6b3a; padding: 10px 14px; border-radius: 6px; margin: 10px 0; }

/* Chat widget */
#chat-widget { position: fixed; bottom: 18px; right: 18px; z-index: 999; }
.chat-toggle { background: #111; color: #fff; border-radius: 999px; padding: 12px 20px; border: 0; cursor: pointer; font-size: 14px; box-shadow: 0 6px 20px rgba(0,0,0,.15); }
.chat-panel { display: none; width: 340px; height: 440px; background: #fff; border: 1px solid var(--border); border-radius: 12px; box-shadow: 0 12px 40px rgba(0,0,0,.18); flex-direction: column; }
.chat-panel.open { display: flex; }
.chat-head { padding: 12px 14px; border-bottom: 1px solid var(--border); font-weight: 600; }
.chat-msgs { flex: 1; overflow-y: auto; padding: 12px; font-size: 14px; }
.chat-msg { margin: 6px 0; padding: 8px 10px; border-radius: 10px; max-width: 85%; }
.chat-msg.user { background: #111; color: #fff; margin-left: auto; }
.chat-msg.bot { background: #f1f1f1; }
.chat-form { display: flex; border-top: 1px solid var(--border); }
.chat-form input { flex: 1; padding: 12px; border: 0; }
.chat-form button { padding: 0 14px; background: var(--accent); color: var(--accent-fg); border: 0; cursor: pointer; }