:root {
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-900: #0f172a;

    --blue-50: #eff6ff;
    --blue-100: #dbeafe;
    --blue-500: #3b82f6;
    --blue-600: #2563eb;
    --blue-700: #1d4ed8;

    --lime-500: #84cc16;
    --lime-600: #65a30d;

    --red-50: #fef2f2;
    --red-600: #dc2626;
    --red-700: #b91c1c;

    --green-50: #f0fdf4;
    --green-600: #16a34a;
    --green-700: #15803d;

    --white: #ffffff;
    --radio: 8px;
    --radio-lg: 12px;
    --sombra: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
    background: var(--gray-50);
    color: var(--gray-900);
}

a { color: inherit; }

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--white);
    padding: 14px 24px;
    border-bottom: 1px solid var(--gray-200);
    flex-wrap: wrap;
    gap: 12px;
}

.topbar-marca { display: flex; align-items: center; gap: 10px; }

.logo-circulo {
    width: 36px;
    height: 36px;
    border-radius: 999px;
    background: var(--blue-600);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.05rem;
    flex-shrink: 0;
}

.topbar h1 { font-size: 1.05rem; font-weight: 700; margin: 0; }

.topbar-derecha { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }

.tabs-vista {
    display: flex;
    gap: 4px;
    background: var(--gray-100);
    padding: 3px;
    border-radius: var(--radio);
    flex-wrap: wrap;
}

.tabs-vista a {
    padding: 6px 14px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.86rem;
    font-weight: 500;
    color: var(--gray-600);
    white-space: nowrap;
}

.tabs-vista a.activa { background: var(--white); color: var(--gray-900); box-shadow: var(--sombra); }

.menu-usuario { display: flex; align-items: center; gap: 14px; }

.nombre-usuario { font-size: 0.88rem; font-weight: 600; color: var(--gray-900); }

.menu-usuario a { color: var(--gray-500); text-decoration: none; font-size: 0.88rem; }
.menu-usuario a:hover { color: var(--gray-900); }

main { max-width: 1100px; margin: 0 auto; padding: 24px; }

.titulo-seccion { font-size: 1.3rem; font-weight: 700; margin: 0 0 18px; }
.titulo-subseccion { font-size: 1.02rem; font-weight: 700; margin: 28px 0 12px; }

.enlace-volver { display: inline-block; margin-bottom: 14px; color: var(--gray-500); text-decoration: none; font-size: 0.88rem; }
.enlace-volver:hover { color: var(--gray-900); }

.acciones-top { display: flex; gap: 10px; margin-bottom: 18px; flex-wrap: wrap; }

.acciones-top input[type="search"] {
    flex: 1;
    min-width: 200px;
    padding: 9px 14px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radio);
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--white);
}

.acciones-top input[type="search"]:focus,
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--blue-500);
    box-shadow: 0 0 0 3px var(--blue-100);
}

.vacio {
    text-align: center;
    color: var(--gray-500);
    padding: 48px 20px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radio-lg);
}

.vacio-inline { color: var(--gray-500); font-size: 0.82rem; }

.tabla-wrap {
    overflow-x: auto;
    background: var(--white);
    border-radius: var(--radio-lg);
    border: 1px solid var(--gray-200);
    box-shadow: var(--sombra);
    margin-bottom: 14px;
}

table { width: 100%; border-collapse: collapse; min-width: 560px; }

th, td {
    text-align: left;
    padding: 12px 16px;
    border-bottom: 1px solid var(--gray-200);
    font-size: 0.9rem;
    vertical-align: middle;
}

th {
    color: var(--gray-500);
    font-weight: 600;
    font-size: 0.76rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    background: var(--gray-50);
}

tr:last-child td { border-bottom: none; }

.notas { color: var(--gray-500); max-width: 220px; white-space: pre-wrap; }

.etiqueta {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
    white-space: nowrap;
    background: var(--gray-100);
    color: var(--gray-600);
}

.etiqueta-ok { background: var(--green-50); color: var(--green-700); }
.etiqueta-vencido { background: var(--red-50); color: var(--red-700); }

.acciones { display: flex; gap: 6px; flex-wrap: wrap; }

.boton {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: var(--radio);
    border: 1px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-900);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    line-height: 1.2;
    font-family: inherit;
    transition: background 0.15s ease, border-color 0.15s ease;
}

.boton:hover { background: var(--gray-50); }
.boton-chico { padding: 5px 10px; font-size: 0.8rem; }

.boton-primario { background: var(--blue-600); border-color: var(--blue-600); color: var(--white); }
.boton-primario:hover { background: var(--blue-700); border-color: var(--blue-700); }

.boton-secundario { border-color: var(--gray-200); }

.boton-peligro { border-color: var(--gray-200); color: var(--red-600); }
.boton-peligro:hover { background: var(--red-50); border-color: var(--red-50); }

.pantalla-login { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 20px; background: var(--gray-900); }

.tarjeta-login {
    background: var(--white);
    padding: 32px 28px;
    border-radius: var(--radio-lg);
    border: 1px solid var(--gray-200);
    box-shadow: var(--sombra);
    width: 100%;
    max-width: 384px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.tarjeta-login .logo-circulo { width: 52px; height: 52px; font-size: 1.5rem; margin: 0 auto 14px; }
.tarjeta-login h1 { text-align: center; font-size: 1.15rem; font-weight: 700; margin: 0; }
.tarjeta-login .subtitulo { text-align: center; color: var(--gray-500); font-size: 0.88rem; margin: 2px 0 16px; }
.tarjeta-login label { font-weight: 600; font-size: 0.85rem; margin-top: 6px; }

.tarjeta-login input {
    padding: 9px 12px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radio);
    font-size: 0.95rem;
    font-family: inherit;
    margin-bottom: 6px;
}

.tarjeta-login button { margin-top: 10px; }

.formulario {
    background: var(--white);
    padding: 24px;
    border-radius: var(--radio-lg);
    border: 1px solid var(--gray-200);
    box-shadow: var(--sombra);
    max-width: 480px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 18px;
}

.formulario label { font-weight: 600; font-size: 0.85rem; margin-top: 12px; }
.checkbox-label { display: flex; align-items: center; gap: 8px; font-weight: 500 !important; margin-top: 16px !important; }

.formulario input, .formulario textarea, .formulario select {
    padding: 9px 12px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radio);
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--white);
}

.formulario small { color: var(--gray-500); font-size: 0.8rem; }
.formulario-nota { color: var(--gray-500); font-size: 0.85rem; margin: -6px 0 18px; }

.formulario .acciones-form { margin-top: 20px; display: flex; gap: 10px; flex-wrap: wrap; }

.formulario-horizontal { max-width: 720px; flex-direction: row; align-items: flex-end; flex-wrap: wrap; gap: 14px; }
.formulario-horizontal .campo { display: flex; flex-direction: column; gap: 6px; flex: 1; min-width: 160px; }
.formulario-horizontal label { margin-top: 0; }

.formulario-inline {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
    background: var(--white);
    padding: 12px;
    border-radius: var(--radio);
    border: 1px solid var(--gray-200);
    margin-bottom: 14px;
}

.formulario-inline input, .formulario-inline select {
    padding: 7px 10px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radio);
    font-size: 0.88rem;
    font-family: inherit;
}

.input-chico { width: 90px; }
.input-mediano { flex: 1; min-width: 160px; }

.formulario-nuevo-dia { background: var(--blue-50); border-color: var(--blue-100); }

.error { color: var(--red-700); background: var(--red-50); padding: 9px 12px; border-radius: var(--radio); font-size: 0.88rem; }
.ok { color: var(--green-700); background: var(--green-50); padding: 9px 12px; border-radius: var(--radio); font-size: 0.88rem; display: inline-block; margin-bottom: 14px; }

.grilla-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; margin-bottom: 10px; }

.card-metrica {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radio-lg);
    box-shadow: var(--sombra);
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    text-decoration: none;
    color: var(--gray-900);
    transition: border-color 0.15s ease;
}

.card-metrica:hover { border-color: var(--blue-500); }
.card-metrica-estatica { cursor: default; }
.card-metrica-estatica:hover { border-color: var(--gray-200); }

.card-icono { font-size: 1.4rem; }
.card-numero { font-size: 1.6rem; font-weight: 800; }
.card-etiqueta { color: var(--gray-500); font-size: 0.85rem; }

.grilla-rutinas { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }

.card-rutina {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radio-lg);
    box-shadow: var(--sombra);
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.card-rutina-header { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.card-rutina-header h3 { margin: 0; font-size: 1.02rem; font-weight: 700; }
.card-rutina-desc { color: var(--gray-600); font-size: 0.88rem; margin: 0; }
.card-rutina-meta { color: var(--gray-500); font-size: 0.82rem; margin: 0; }

.card-dia {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radio-lg);
    box-shadow: var(--sombra);
    padding: 18px;
    margin-bottom: 16px;
}

.card-dia-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; gap: 10px; }
.card-dia-header h4 { margin: 0; font-size: 0.98rem; font-weight: 700; }
.card-dia h4 { margin: 0 0 10px; font-size: 0.98rem; font-weight: 700; }

.tabs-dias { display: flex; gap: 6px; margin-bottom: 18px; flex-wrap: wrap; }

.tabs-dias a {
    padding: 8px 16px;
    border-radius: 999px;
    border: 1px solid var(--gray-200);
    background: var(--white);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--gray-600);
}

.tabs-dias a.activa { background: var(--blue-600); border-color: var(--blue-600); color: var(--white); }

.card-entrenamiento {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radio-lg);
    box-shadow: var(--sombra);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.label-fecha { font-weight: 600; font-size: 0.85rem; }
.card-entrenamiento > input[type="date"] { max-width: 180px; padding: 8px 10px; border: 1px solid var(--gray-200); border-radius: var(--radio); }

.fila-ejercicio-cliente {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    padding: 14px 0;
    border-top: 1px solid var(--gray-100);
    flex-wrap: wrap;
}

.fila-ejercicio-cliente:first-of-type { border-top: none; }

.fila-ejercicio-info { display: flex; flex-direction: column; gap: 3px; min-width: 200px; }
.fila-ejercicio-info strong { font-size: 0.95rem; }

.link-video { color: var(--blue-600); font-size: 0.82rem; text-decoration: none; font-weight: 600; }

.fila-ejercicio-inputs { display: flex; gap: 8px; flex-wrap: wrap; }

.fila-ejercicio-inputs input {
    padding: 8px 10px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radio);
    font-size: 0.9rem;
    width: 130px;
}

@media (max-width: 600px) {
    main { padding: 14px; }
    .formulario { padding: 18px; }
    .topbar { padding: 12px 16px; }
    .formulario-horizontal { flex-direction: column; align-items: stretch; }
    .fila-ejercicio-inputs input { width: 100%; }
}