:root{--c-primary: #19b5b5;--c-primary-dark: #0f9a9a;--c-bg: #eef4f5;--c-surface: #ffffff;--c-text: #16242a;--c-text-muted: #6b7b81;--c-border: #e2e8ea;--c-danger: #e2574c;--c-success: #2bb673}*{box-sizing:border-box}html,body{margin:0;padding:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:var(--c-text);background:var(--c-bg)}@keyframes spin{to{transform:rotate(360deg)}}.btn-spinner{width:16px;height:16px;border-radius:50%;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;animation:spin .8s linear infinite}