/* 1-3 River Rock Calculator Pro - style.css (mobile-first) */
.rrc-container{font-family:Inter,system-ui,Segoe UI,Roboto,Arial,sans-serif;max-width:980px;margin:18px auto;padding:12px;}
.rrc-card{background:linear-gradient(180deg,#f7fbf6 0%,#ffffff 100%);border-radius:14px;box-shadow:0 8px 28px rgba(2,18,50,0.06);padding:16px;overflow:hidden;}
.rrc-header h1{font-size:1.4rem;margin:0 0 6px;}
.rrc-sub{color:#374151;margin:0 0 12px;}
.rrc-form{display:flex;flex-direction:column;gap:12px;}
.rrc-row{display:flex;flex-direction:column;gap:10px;}
.rrc-row label{display:flex;flex-direction:column;font-size:0.92rem;}
.rrc-row input, .rrc-row select{padding:10px;border-radius:10px;border:1px solid #e6f0ea;font-size:1rem;margin-top:6px;}
.rrc-controls{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:6px;}
.rrc-btn{background:#10b981;color:#fff;border:none;padding:8px 12px;border-radius:10px;cursor:pointer;box-shadow:0 6px 18px rgba(16,185,129,0.12);}
.rrc-toggle{font-size:0.85rem;color:#374151;margin-left:8px;}
.rrc-result{margin-top:12px;background:linear-gradient(180deg,#ffffff,#f8fffa);border-radius:12px;padding:12px;box-shadow:inset 0 1px 0 rgba(255,255,255,0.6);}
.rrc-result-inner h2{margin:0 0 8px;}
.rrc-result-item{padding:8px;border-radius:8px;margin-bottom:6px;background:#fbfffc;border:1px solid #e9f7ef;}
.rrc-note{display:block;margin-top:8px;color:#6b7280;font-size:0.85rem;}
.rrc-footer{margin-top:12px;text-align:right;color:#6b7280;font-size:0.8rem;}
@media(min-width:720px){
    .rrc-row{flex-direction:row;gap:12px;}
    .rrc-row label{flex:1;}
    .rrc-container{padding:18px;}
}
/* Dark mode */
:root[data-theme='dark'] .rrc-card{background:linear-gradient(180deg,#0b1f14 0%,#062512 100%);color:#dff6e9;}