/**
 * Simple Interest Tool Specific Styling
 */
*{margin:0;padding:0;box-sizing:border-box}
.si-calc{font-family:'Inter',sans-serif;color:#0f172a;padding:16px}
.si-card{background:#fff;border-radius:12px;padding:32px;box-shadow:0 4px 20px rgba(0,0,0,.06);max-width:480px;margin:0 auto}
.si-card h2{font-size:1.5rem;font-weight:700;margin-bottom:4px}
.si-card .subtitle{color:#64748b;font-size:.875rem;margin-bottom:24px}
.si-input{margin-bottom:16px}
.si-input label{display:block;font-size:.75rem;font-weight:600;color:#64748b;text-transform:uppercase;letter-spacing:.05em;margin-bottom:6px}
.si-input-wrap{position:relative}
.si-input-wrap .prefix,.si-input-wrap .suffix{position:absolute;top:50%;transform:translateY(-50%);font-size:.875rem;color:#94a3b8;font-weight:500;pointer-events:none}
.si-input-wrap .prefix{left:14px}
.si-input-wrap .suffix{right:14px}
.si-input-wrap input{width:100%;height:48px;border:2px solid #e2e8f0;border-radius:8px;font-size:1rem;font-family:'Inter',sans-serif;color:#0f172a;background:#fff;transition:all .2s ease;outline:none;padding:0 14px}
.si-input-wrap input.has-prefix{padding-left:32px}
.si-input-wrap input.has-suffix{padding-right:40px}
.si-input-wrap input::placeholder{color:#94a3b8}
.si-input-wrap input:focus{border-color:#4f46e5;box-shadow:0 0 0 3px rgba(79,70,229,.15)}
.si-formula{background:#f8fafc;border-radius:8px;padding:14px 18px;font-size:.875rem;color:#64748b;margin-bottom:20px;text-align:center;font-style:italic}
.si-formula span{color:#4f46e5;font-weight:600;font-style:normal}
.si-result{display:none}
.si-result.show{display:block}
.si-result-card{border-radius:12px;padding:24px;background:linear-gradient(135deg,#4f46e5 0%,#7c3aed 100%);color:#fff;margin-bottom:12px}
.si-result-card .row{display:flex;justify-content:space-between;align-items:center;padding:8px 0}
.si-result-card .row+.row{border-top:1px solid rgba(255,255,255,.2)}
.si-result-card .label{font-size:.875rem;opacity:.85}
.si-result-card .value{font-size:1.25rem;font-weight:700}
.si-result-card .value.large{font-size:1.5rem}
.si-error{color:#dc2626;font-size:.875rem;text-align:center;padding:16px;background:#fef2f2;border-radius:8px;margin-top:16px;display:none}
.si-error.show{display:block}
[data-theme="dark"] .si-card{background:#1e293b}
[data-theme="dark"] .si-card h2{color:#f1f5f9}
[data-theme="dark"] .si-card .subtitle{color:#94a3b8}
[data-theme="dark"] .si-input-wrap input{background:#0f172a;border-color:#334155;color:#f1f5f9}
[data-theme="dark"] .si-input-wrap input:focus{border-color:#4f46e5}
[data-theme="dark"] .si-formula{background:#334155;color:#94a3b8}
[data-theme="dark"] .si-error{background:#450a0a;color:#fca5a5}