/* Material-inspired styles with theme variants */
:root{--bg:#ffffff;--card:#fbfcfd;--fg:#111827;--muted:#6b7280;--accent:#0b76ef;--elev:0 6px 18px rgba(11,118,239,0.12)}
[data-theme="dark"]{--bg:#0b1220;--card:#0f1724;--fg:#e6eef8;--muted:#94a3b8;--accent:#3aa0ff;--elev:0 8px 24px rgba(0,0,0,0.6)}
[data-theme="solar"]{--bg:#fff8e7;--card:#fff;--fg:#3b2f2f;--muted:#8b6b3a;--accent:#ff8a00}
[data-theme="forest"]{--bg:#f3fbf4;--card:#ffffff;--fg:#0b3d2e;--muted:#5b8a73;--accent:#197a3a}
[data-theme="cloud"]{--bg:#f0f6fb;--card:#ffffff;--fg:#0f2a3a;--muted:#6b8a9a;--accent:#2b9cff}
[data-theme="hc"]{--bg:#000;--card:#000;--fg:#fff;--muted:#ddd;--accent:#0ff}
*{box-sizing:border-box}
body{font-family:Inter,system-ui,Segoe UI,Roboto,Helvetica,Arial;margin:0;background:var(--bg);color:var(--fg);-webkit-font-smoothing:antialiased}
.topbar{display:flex;align-items:center;gap:12px;padding:12px 18px;border-bottom:1px solid rgba(0,0,0,0.06);background:linear-gradient(180deg,rgba(0,0,0,0.02),transparent)}
.brand{display:flex;align-items:center;gap:10px}
.logo{width:36px;height:36px;border-radius:8px}
.topbar h1{margin:0;font-size:1rem}
nav{display:flex;gap:8px;margin-left:12px}
nav.hidden{display:none}
nav button{background:transparent;border:0;padding:8px 12px;border-radius:8px;color:var(--muted);cursor:pointer}
nav button:hover{background:rgba(11,118,239,0.06);color:var(--fg)}
.auth-area{margin-left:auto;display:flex;align-items:center;gap:8px}
.auth-area button{padding:8px 10px;border-radius:8px;border:1px solid transparent;background:var(--card);cursor:pointer}
#user-area{position:relative;display:flex;align-items:center;gap:8px;cursor:pointer;z-index:2000}
#user-menu{pointer-events:auto;z-index:9999}
.small-btn{padding:6px 10px;border-radius:8px;background:var(--card);color:var(--fg);border:1px solid rgba(0,0,0,0.06)}
#user-avatar{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:50%;background:linear-gradient(180deg,rgba(0,0,0,0.04),transparent);font-size:18px}
#current-user{padding:6px 8px;border-radius:8px;background:transparent}
#user-menu{position:absolute;right:0;top:46px;background:var(--card);border-radius:8px;box-shadow:var(--elev);display:flex;flex-direction:column;padding:6px;min-width:160px}
#user-menu button{background:transparent;border:0;padding:8px 10px;text-align:left;color:var(--fg);cursor:pointer}
#user-menu button:hover{background:rgba(11,118,239,0.04)}
.csv-tools{margin:8px 0;display:flex;gap:8px;align-items:center}

main{padding:20px}
.page{max-width:1100px;margin:18px auto}
.center{display:flex;align-items:center;justify-content:center;min-height:60vh}
.card{background:var(--card);padding:18px;border-radius:12px;box-shadow:var(--elev);max-width:720px}
.card.small{max-width:640px}
.row{display:flex;flex-wrap:wrap;gap:12px}
.gap{gap:8px}
.col{flex:1;min-width:260px}
.form-row{display:flex;gap:8px}
input,select,button{font:inherit}
input,select{padding:10px;border-radius:8px;border:1px solid rgba(0,0,0,0.06);width:100%}
.autosave-row{display:flex;gap:12px;align-items:center;margin:8px 0}
.autosave-label{display:flex;align-items:center;gap:8px;font-weight:600}
.autosave-note{display:flex;align-items:center;gap:8px}
button{padding:10px 14px;border-radius:10px;border:0;background:var(--accent);color:white}
.list{list-style:none;padding:0;margin:8px 0;border-radius:8px;max-height:320px;overflow:auto;background:linear-gradient(180deg,rgba(0,0,0,0.02),transparent)}
.list li{padding:10px;border-bottom:1px solid rgba(0,0,0,0.04)}
.cart-actions{display:flex;flex-direction:column;gap:8px;margin-top:12px}
.total{font-weight:700;font-size:1.2rem}
.modal{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,0.32)}
.modal-content{background:var(--card);color:var(--fg);padding:16px;border-radius:10px;max-width:90%;max-height:80%;overflow:auto}
small{color:var(--muted)}
@media (max-width:820px){.row{flex-direction:column}.topbar{padding:12px}.brand h1{display:none}.nav{display:none}}