:root {
    --ink: #071014;
    --panel: #ffffff;
    --page: #f3f5f8;
    --line: #d7dde3;
    --green: #246b43;
    --yellow: #ffd119;
    --yellow-active: #d8ff22;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; font-family: "Segoe UI", Arial, sans-serif; color: var(--ink); }

.admin-login-body { background: #eef2ef; }
.admin-login-shell { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.admin-login-card {
    width: min(100%, 440px); padding: 34px 32px 32px; border: 1px solid #d1d9d5;
    border-radius: 9px; background: var(--panel); box-shadow: 0 18px 38px rgba(7, 16, 20, .09);
}
.admin-login-brand, .admin-brand { display: flex; align-items: center; text-decoration: none; }
.admin-login-brand { gap: 14px; color: var(--green); font-size: 20px; font-weight: 800; }
.admin-login-brand img { width: 40px; height: 48px; border-radius: 7px; object-fit: cover; }
.admin-login-card h1 { margin: 27px 0 18px; font-size: 28px; }
.admin-login-card form { display: grid; gap: 10px; }
.admin-login-card label { margin-top: 2px; font-weight: 700; }
.admin-login-card input {
    width: 100%; height: 44px; margin-bottom: 10px; padding: 0 12px; border: 1px solid #b7c3cb;
    border-radius: 6px; background: #edf3ff; color: var(--ink); font-size: 15px;
}
.admin-login-card button {
    height: 46px; margin-top: 2px; border: 0; border-radius: 6px; background: var(--green);
    color: #fff; font-size: 16px; font-weight: 800; cursor: pointer;
}
.admin-login-card button:hover { background: #185634; }
.admin-alert { margin-bottom: 14px; padding: 11px 12px; border-radius: 6px; background: #fee8e7; color: #9b2420; }

.admin-panel-body { background: var(--page); }
.admin-shell { min-height: 100vh; display: grid; grid-template-columns: 260px minmax(0, 1fr); }
.admin-sidebar {
    position: sticky; top: 0; height: 100vh; display: flex; flex-direction: column;
    padding: 30px 16px 0; background: var(--ink); color: #fff;
}
.admin-brand { gap: 12px; padding: 0 12px 19px; border-bottom: 1px solid #39451c; color: #fff; }
.admin-brand img { width: 34px; height: 40px; border-radius: 6px; object-fit: cover; }
.admin-brand span, .admin-brand strong, .admin-brand small { display: block; }
.admin-brand strong { font-size: 17px; }
.admin-brand small { margin-top: 3px; font-size: 12px; font-weight: 400; }
.admin-nav { display: grid; gap: 7px; margin-top: 19px; }
.admin-nav a { padding: 12px; border-radius: 8px; color: #fff; font-weight: 750; text-decoration: none; }
.admin-nav a:hover { background: #162126; }
.admin-nav a.is-active { background: var(--yellow-active); color: #071014; }
.admin-sidebar-footer { display: grid; gap: 12px; margin-top: auto; padding: 16px 8px 0; border-top: 1px solid #39451c; }
.admin-sidebar-footer span { font-size: 14px; }
.admin-sidebar-footer small { color: #c7d0d4; }
.admin-sidebar-footer a { padding-bottom: 3px; color: var(--yellow); font-weight: 800; text-decoration: none; }
.admin-content { min-width: 0; padding: 28px clamp(24px, 5vw, 70px); }
.admin-welcome {
    max-width: 900px; min-height: 138px; padding: 34px 26px; border: 1px solid var(--line);
    border-radius: 10px; background: #fff; box-shadow: 0 12px 24px rgba(7,16,20,.07);
}
.admin-welcome h1 { margin: 14px 0; font-size: clamp(28px, 3vw, 34px); }
.admin-welcome p { color: #56636b; }

.seccion { margin-bottom: 24px; padding: 26px; border: 1px solid var(--line); border-radius: 10px; background: #fff; box-shadow: 0 10px 22px rgba(7,16,20,.06); }
.seccion h2 { margin: 0 0 12px; }
.panel-encabezado { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-bottom: 20px; }
.panel-encabezado h2, .panel-encabezado p { margin: 0 0 6px; }
.tabla-responsive { overflow-x: auto; }
.tabla-datos { width: 100%; border-collapse: collapse; }
.tabla-datos th, .tabla-datos td { padding: 12px 10px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
.tabla-datos th { background: #f5f7f9; font-size: 13px; }
.gym-estado { display: inline-block; padding: 5px 9px; border-radius: 999px; font-size: 12px; font-weight: 800; }
.gym-estado.is-active { background: #dcf6e6; color: #176139; }
.gym-estado.is-inactive { background: #f1e4e3; color: #8b2924; }
.gym-admin-actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.gym-admin-actions a, .btn { color: #155f3a; font-weight: 750; text-decoration: none; }
.gym-admin-actions .is-delete { color: #a52b25; }
.form-general label { display: block; margin-bottom: 6px; font-weight: 700; }
.form-general input, .form-general select { width: 100%; min-height: 42px; padding: 9px 11px; border: 1px solid #b7c3cb; border-radius: 6px; background: #fff; font: inherit; }
.form-general small { display: block; margin-top: 5px; color: #657179; }
.form-grid-admin { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2px 20px; }
.admin-password-field { display: flex; }
.admin-password-field input { border-radius: 6px 0 0 6px; }
.admin-password-toggle { min-width: 44px; border: 1px solid #b7c3cb; border-left: 0; border-radius: 0 6px 6px 0; background: #eef2f4; cursor: pointer; }
.botones-principales { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.btn-principal { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 10px 16px; border: 0; border-radius: 6px; color: #fff; font: inherit; font-weight: 800; text-decoration: none; cursor: pointer; }
.btn-celeste { background: #176a83; }
.btn-verde { background: var(--green); }
.btn-borrar { background: #a52b25; }
.alert { margin: 14px 0; padding: 12px 14px; border-radius: 6px; }
.alert-success { background: #dcf6e6; color: #176139; }
.alert-error { background: #fee8e7; color: #8b2924; }
.cliente-borrado-confirmacion { display: flex; gap: 10px; align-items: flex-start; padding: 14px; background: #fff4f3; }
.cliente-borrado-confirmacion input { margin-top: 3px; }

@media (max-width: 720px) {
    .admin-shell { grid-template-columns: 1fr; }
    .admin-sidebar { position: static; width: 100%; height: auto; padding-bottom: 16px; }
    .admin-nav { grid-template-columns: repeat(2, 1fr); }
    .admin-sidebar-footer { margin-top: 18px; }
    .admin-content { padding: 18px; }
    .form-grid-admin { grid-template-columns: 1fr; }
    .panel-encabezado { align-items: flex-start; flex-direction: column; }
}