/**
 * Fuel Cost Calculator Tool Specific Styling
 */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Inter',sans-serif;color:#0f172a;line-height:1.5}
.fc-card{background:#fff;border-radius:12px;box-shadow:0 4px 20px rgba(0,0,0,.06);padding:28px;max-width:500px;margin:0 auto}
.fc-title{font-size:18px;font-weight:700;margin-bottom:20px;color:#0f172a}
.fc-unit-toggle{display:flex;gap:6px;margin-bottom:18px}
.fc-unit-toggle span{font-size:12px;font-weight:600;color:#64748b;align-self:center}
.fc-toggle-btn{display:inline-flex;align-items:center;gap:4px;background:#f1f5f9;border:none;border-radius:6px;padding:5px 10px;font-family:'Inter',sans-serif;font-size:12px;font-weight:600;color:#64748b;cursor:pointer;transition:all .2s ease}
.fc-toggle-btn.active{background:#4f46e5;color:#fff}
.fc-field{margin-bottom:14px}
.fc-field label{display:block;font-size:13px;font-weight:600;color:#64748b;margin-bottom:6px}
.fc-input-wrap{position:relative;display:flex;align-items:center}
.fc-input-wrap .suffix{position:absolute;right:14px;font-size:13px;font-weight:500;color:#64748b;pointer-events:none}
.fc-input{width:100%;height:48px;border:1.5px solid #e2e8f0;border-radius:8px;padding:0 14px;font-family:'Inter',sans-serif;font-size:15px;color:#0f172a;background:#fff;transition:all .2s ease;outline:none}
.fc-input.has-suffix{padding-right:60px}
.fc-input:focus{border-color:#4f46e5;box-shadow:0 0 0 3px rgba(79,70,229,.1)}
.fc-error{font-size:12px;color:#ef4444;margin-top:4px;display:none}
.fc-error.visible{display:block}
.fc-results{background:#f8fafc;border-radius:10px;padding:18px;margin-top:20px;display:none}
.fc-results.visible{display:block}
.fc-result-row{display:flex;justify-content:space-between;align-items:center;padding:10px 0}
.fc-result-row:not(:last-child){border-bottom:1px solid #e2e8f0}
.fc-result-label{font-size:13px;color:#64748b;font-weight:500}
.fc-result-value{font-size:15px;font-weight:700;color:#0f172a}
.fc-result-row.total .fc-result-label{font-size:14px;color:#0f172a;font-weight:600}
.fc-result-row.total .fc-result-value{font-size:18px;color:#4f46e5}
.fc-breakdown{background:#fff;border-radius:8px;padding:14px;margin-top:12px;font-size:12px;color:#64748b;line-height:1.7}
@media(prefers-color-scheme:dark){.fc-card{background:#1e293b;box-shadow:0 4px 20px rgba(0,0,0,.3)}.fc-title{color:#f1f5f9}.fc-input{background:#0f172a;border-color:#334155;color:#f1f5f9}.fc-input:focus{border-color:#4f46e5;box-shadow:0 0 0 3px rgba(79,70,229,.15)}.fc-result-value{color:#f1f5f9}.fc-result-row.total .fc-result-label{color:#f1f5f9}.fc-results{background:#0f172a}.fc-result-row:not(:last-child){border-color:#334155}.fc-breakdown{background:#0f172a;color:#94a3b8}.fc-toggle-btn{background:#0f172a;color:#94a3b8}.fc-toggle-btn.active{background:#4f46e5;color:#fff}}
[data-theme="dark"] .fc-card{background:#1e293b;box-shadow:0 4px 20px rgba(0,0,0,.3)}
[data-theme="dark"] .fc-title{color:#f1f5f9}
[data-theme="dark"] .fc-input{background:#0f172a;border-color:#334155;color:#f1f5f9}
[data-theme="dark"] .fc-input:focus{border-color:#4f46e5;box-shadow:0 0 0 3px rgba(79,70,229,.15)}
[data-theme="dark"] .fc-result-value{color:#f1f5f9}
[data-theme="dark"] .fc-result-row.total .fc-result-label{color:#f1f5f9}
[data-theme="dark"] .fc-results{background:#0f172a}
[data-theme="dark"] .fc-result-row:not(:last-child){border-color:#334155}
[data-theme="dark"] .fc-breakdown{background:#0f172a;color:#94a3b8}
[data-theme="dark"] .fc-toggle-btn{background:#0f172a;color:#94a3b8}
[data-theme="dark"] .fc-toggle-btn.active{background:#4f46e5;color:#fff}