:root{--color-bg: #f5f7fa;--color-surface: #ffffff;--color-text: #1f2933;--color-text-muted: #6b7280;--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-border: #e5e7eb;--color-success: #16a34a;--color-error: #dc2626;--radius-sm: 6px;--radius-md: 10px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .08);--shadow-md: 0 4px 12px rgba(0, 0, 0, .1);--header-height: 64px;--container-width: 1100px}*,*:before,*:after{box-sizing:border-box}html,body,#root{margin:0;padding:0;min-height:100%}body{font-family:Segoe UI,system-ui,-apple-system,Roboto,Arial,sans-serif;background-color:var(--color-bg);color:var(--color-text);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}.app-layout{display:flex;flex-direction:column;min-height:100vh}.app-main{flex:1;width:100%;max-width:var(--container-width);margin:0 auto;padding:32px 20px}.app-header{position:sticky;top:0;z-index:10;height:var(--header-height);background-color:var(--color-surface);border-bottom:1px solid var(--color-border);box-shadow:var(--shadow-sm)}.app-header__inner{display:flex;align-items:center;justify-content:space-between;max-width:var(--container-width);height:100%;margin:0 auto;padding:0 20px}.app-header__logo{font-size:1.25rem;font-weight:700;color:var(--color-primary);text-decoration:none}.app-header__logo:hover{text-decoration:none}.app-header__nav{display:flex;gap:8px}.app-header__link{padding:8px 14px;border-radius:var(--radius-sm);color:var(--color-text-muted);font-weight:500;transition:background-color .15s ease,color .15s ease}.app-header__link:hover{color:var(--color-text);background-color:var(--color-bg);text-decoration:none}.app-header__link--active{color:var(--color-primary);background-color:#2563eb14}.app-footer{border-top:1px solid var(--color-border);background-color:var(--color-surface)}.app-footer__inner{display:flex;align-items:center;justify-content:center;max-width:var(--container-width);margin:0 auto;padding:20px;color:var(--color-text-muted);font-size:.875rem}.page{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);padding:32px}.page--center{text-align:center}.page__title{margin:0 0 16px;font-size:1.75rem;font-weight:700}.page__subtitle{margin:24px 0 8px;font-size:1.25rem;font-weight:600}.page__text{margin:0 0 16px;color:var(--color-text-muted)}.page__list{margin:0;padding-left:20px;color:var(--color-text-muted)}.page__list li{margin-bottom:4px}.health-card{margin-top:24px;padding:20px;border:1px solid var(--color-border);border-radius:var(--radius-md);background-color:var(--color-bg)}.health-card__title{margin:0 0 8px;font-size:1rem;font-weight:600}.health-card__status{margin:0;font-weight:500}.health-card__status--ok{color:var(--color-success)}.health-card__status--error{color:var(--color-error)}.btn{display:inline-block;padding:10px 20px;border:none;border-radius:var(--radius-sm);background-color:var(--color-primary);color:#fff;font-size:.9375rem;font-weight:600;cursor:pointer;transition:background-color .15s ease}.btn:hover{background-color:var(--color-primary-hover);text-decoration:none}.btn:disabled{opacity:.6;cursor:not-allowed}.btn--secondary{background-color:var(--color-surface);color:var(--color-primary);border:1px solid var(--color-primary)}.btn--secondary:hover:not(:disabled){background-color:#2563eb14}.btn--secondary:disabled{background-color:var(--color-surface);color:var(--color-text-muted);border-color:var(--color-border)}.backend-card{margin-top:24px;padding:20px;border:1px solid var(--color-border);border-radius:var(--radius-md);background-color:var(--color-bg);display:flex;flex-direction:column;gap:12px}.backend-card__row{display:flex;align-items:center;gap:12px}.backend-card__label{font-size:.9375rem;font-weight:600;color:var(--color-text)}.backend-card__textarea{width:100%;padding:10px 12px;border:1px solid var(--color-border);border-radius:var(--radius-sm);background-color:var(--color-surface);color:var(--color-text);font-family:inherit;font-size:.9375rem;line-height:1.5;resize:vertical}.backend-card__textarea:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #2563eb1f}.backend-card__textarea[readonly]{background-color:var(--color-bg);color:var(--color-text-muted)}.backend-card__error{margin:0;color:var(--color-error);font-size:.875rem;font-weight:500}.tabs{display:flex;gap:8px;margin-bottom:24px;border-bottom:1px solid var(--color-border);padding-bottom:12px;flex-wrap:wrap}.tabs__tab{padding:10px 18px;border:1px solid var(--color-border);border-radius:var(--radius-sm);background-color:var(--color-surface);color:var(--color-text-muted);font-size:.9375rem;font-weight:600;cursor:pointer;transition:background-color .15s ease,color .15s ease,border-color .15s ease}.tabs__tab:hover{color:var(--color-text);background-color:var(--color-bg)}.tabs__tab--active{color:var(--color-primary);background-color:#2563eb14;border-color:var(--color-primary)}.db-settings{margin-top:8px}.db-settings__status{margin:0;color:var(--color-text-muted)}.db-settings__form{display:flex;flex-direction:column;gap:20px}.db-settings__grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}.db-settings__field{display:flex;flex-direction:column;gap:6px}.db-settings__label{font-size:.875rem;font-weight:600;color:var(--color-text)}.db-settings__input{width:100%;padding:10px 12px;border:1px solid var(--color-border);border-radius:var(--radius-sm);background-color:var(--color-surface);color:var(--color-text);font-family:inherit;font-size:.9375rem;line-height:1.5}.db-settings__input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #2563eb1f}.db-settings__actions{display:flex;align-items:center;gap:16px}.db-settings__error{margin:0;color:var(--color-error);font-size:.875rem;font-weight:500}.db-settings__success{margin:0;color:var(--color-success);font-size:.875rem;font-weight:500}