@import url("https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=Syne:wght@600;700;800&display=swap");

:root {
    --bg: #f7f7f5;
    --bg-2: #fcfcfb;
    --ink: #1a1712;
    --muted: #6b6356;
    --line: #e8e6e1;
    --surface: #ffffff;
    --accent: #c4a035;
    --accent-hover: #a8862a;
    --accent-soft: #f7efce;
    --warn: #b45309;
    --warn-bg: #fff7ed;
    --danger: #b42318;
    --danger-soft: #fef3f2;
    --radius: 10px;
    --focus: 0 0 0 3px rgb(196 160 53 / 28%);
    --touch: 48px;
    --touch-lg: 52px;
}
* { box-sizing: border-box; }
html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}
body {
    margin: 0;
    font-family: "DM Sans", system-ui, sans-serif;
    color: var(--ink);
    background-color: var(--bg);
    background-image:
        radial-gradient(ellipse 80% 50% at 0% -8%, rgb(196 160 53 / 8%) 0%, transparent 55%),
        radial-gradient(ellipse 60% 40% at 100% 0%, rgb(0 0 0 / 2%) 0%, transparent 50%),
        linear-gradient(180deg, #ffffff 0%, var(--bg-2) 45%, var(--bg) 100%);
    background-attachment: fixed;
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.45;
}
main {
    max-width: 720px;
    margin: 0 auto;
    padding: 1.75rem 1.15rem calc(3.25rem + env(safe-area-inset-bottom, 0px));
    padding-left: max(1.15rem, env(safe-area-inset-left, 0px));
    padding-right: max(1.15rem, env(safe-area-inset-right, 0px));
    animation: enter .35s ease-out;
}
@keyframes enter {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: none; }
}
.top {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}
.top-text { flex: 1; min-width: 0; }
.brand {
    display: flex;
    align-items: center;
    gap: .7rem;
    min-width: 0;
}
.brand-logo {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    object-fit: cover;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgb(26 23 18 / 10%);
    background: var(--accent-soft);
}
.brand h1 {
    margin: 0;
}
h1 {
    margin: 0 0 .35rem;
    font-family: Syne, "DM Sans", sans-serif;
    font-size: clamp(1.55rem, 5.2vw, 2.05rem);
    font-weight: 700;
    letter-spacing: -.03em;
    overflow-wrap: anywhere;
    line-height: 1.15;
}
.sub {
    color: var(--muted);
    margin: 0;
    font-size: .95rem;
}
.msg {
    background: var(--accent-soft);
    color: var(--accent-hover);
    padding: .85rem 1.05rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    border: 1px solid rgb(196 160 53 / 25%);
    font-weight: 500;
}
.msg-error {
    background: var(--danger-soft);
    color: var(--danger);
    border-color: rgb(180 35 24 / 18%);
}
.login-panel {
    max-width: 420px;
}
.login-form {
    display: grid;
    gap: 1rem;
}
.login-form label {
    display: flex;
    flex-direction: column;
    gap: .4rem;
    font-size: .82rem;
    font-weight: 600;
    color: var(--muted);
}
.login-form .hint {
    margin: 0;
    color: var(--muted);
    font-size: .9rem;
    line-height: 1.4;
}
.llaves-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: .75rem;
}
.llaves-list li {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    padding: .75rem 0;
    border-bottom: 1px solid var(--line);
}
.llaves-list li:last-child {
    border-bottom: 0;
}
.llaves-list .meta {
    color: var(--muted);
    font-size: .88rem;
}
.link-salir {
    color: var(--muted);
    font-weight: 600;
    text-decoration: none;
    font-size: .92rem;
}
.link-salir:hover { color: var(--accent); }
.panel {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 1.15rem 1.2rem;
    margin-bottom: 1.15rem;
}
h2 {
    margin: 0 0 .9rem;
    font-family: Syne, "DM Sans", sans-serif;
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: -.02em;
}
.btn, button {
    font-family: inherit;
    font-size: 1rem;
    border: 0;
    border-radius: 10px;
    padding: .7rem 1.1rem;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .4rem;
    font-weight: 600;
    min-height: var(--touch);
    min-width: var(--touch);
    line-height: 1.2;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    user-select: none;
}
.btn-primary, button.btn-primary {
    background: var(--accent);
    color: #fff;
}
.btn-primary:hover, button.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:active, button.btn-primary:active { background: #947420; }
.btn-ghost {
    background: transparent;
    color: var(--muted);
    border: 1px solid var(--line);
}
.btn-ghost:hover { color: var(--ink); background: #f5f4f1; }
.btn-ghost:active { background: #ebe8e1; color: var(--ink); }
.btn-danger {
    background: transparent;
    color: var(--danger);
    border: 1px solid #efc4c4;
}
.btn-danger:active { background: var(--danger-soft); }
.top-actions {
    display: flex;
    gap: .55rem;
    flex-wrap: wrap;
    align-items: stretch;
}
.top-actions .btn {
    flex: 1 1 auto;
}

/* Selector de días */
.dias-selector {
    display: flex;
    flex-wrap: nowrap;
    gap: .55rem;
    margin-bottom: 1.15rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: .15rem;
    margin-left: -.15rem;
    margin-right: -.15rem;
    padding-left: .15rem;
    padding-right: .15rem;
}
.dias-selector::-webkit-scrollbar { display: none; }
.dia-chip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: var(--touch);
    padding: .55rem 1.15rem;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: var(--surface);
    color: var(--muted);
    font-weight: 600;
    font-size: .95rem;
    text-decoration: none;
    white-space: nowrap;
    flex-shrink: 0;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}
.dia-chip:hover { color: var(--ink); border-color: #b8c4d0; }
.dia-chip:active { background: #f5f4f1; }
.dia-chip.activo {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}
.dia-chip.activo:active { background: var(--accent-hover); }

/* Lista ejercicios */
.ejercicio-lista { list-style: none; margin: 0; padding: 0; }
.ejercicio-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
    padding: 1.05rem 0;
    min-height: var(--touch-lg);
    border-bottom: 1px solid var(--line);
    text-decoration: none;
    color: inherit;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}
.ejercicio-item:last-child { border-bottom: 0; padding-bottom: 0; }
.ejercicio-item:first-child { padding-top: 0; }
.ejercicio-item:hover .ej-nombre { color: var(--accent); }
.ejercicio-item:active { background: rgb(196 160 53 / 6%); }
.ej-nombre {
    font-weight: 600;
    font-size: 1.02rem;
    margin: 0 0 .2rem;
}
.ej-meta { color: var(--muted); font-size: .88rem; margin: 0; }
.ej-badge {
    flex-shrink: 0;
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
    padding: .25rem .55rem;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent-hover);
}
.ej-chevron { color: var(--muted); font-size: 1.2rem; flex-shrink: 0; }

/* Métricas */
.metricas {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: .75rem;
    margin-bottom: 1.15rem;
}
.metrica {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: .9rem 1rem;
}
.metrica-label {
    margin: 0 0 .25rem;
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .05em;
    color: var(--muted);
}
.metrica-valor {
    margin: 0;
    font-family: Syne, "DM Sans", sans-serif;
    font-size: clamp(1.35rem, 4vw, 1.7rem);
    font-weight: 700;
    letter-spacing: -.02em;
    font-variant-numeric: tabular-nums;
}
.metrica-valor.up { color: var(--accent); }
.metrica-valor.down { color: var(--warn); }
.metrica-valor.flat { color: var(--ink); }

/* Histórico */
.historico-vacio {
    color: var(--muted);
    margin: 0;
    font-size: .95rem;
}
.historial-lista {
    display: grid;
    gap: .85rem;
}
.historial-item {
    padding-bottom: .85rem;
    border-bottom: 1px solid var(--line);
}
.historial-item:last-child {
    padding-bottom: 0;
    border-bottom: 0;
}
.historial-item.es-hoy {
    background: var(--accent-soft);
    margin: -.35rem -.55rem .15rem;
    padding: .65rem .7rem .85rem;
    border-radius: 8px;
    border-bottom: 0;
}
.historial-item-acciones {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: .75rem;
    flex-wrap: wrap;
}
.historial-item-acciones .btn-danger {
    flex-shrink: 0;
}
.historial-mas {
    margin-top: 1rem;
    border-top: 1px solid var(--line);
    padding-top: .75rem;
}
.historial-mas summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--muted);
    list-style: none;
    min-height: var(--touch);
    display: flex;
    align-items: center;
    padding: .25rem 0;
    -webkit-tap-highlight-color: transparent;
}
.historial-mas summary::-webkit-details-marker { display: none; }
.historial-mas summary::after {
    content: " ▾";
    margin-left: .25rem;
}
.historial-mas[open] summary::after {
    content: " ▴";
}
.historico-fecha {
    margin: 0 0 .65rem;
    font-weight: 600;
    color: var(--ink);
    display: flex;
    align-items: center;
    gap: .5rem;
    flex-wrap: wrap;
}
.historico-series {
    list-style: none;
    margin: 0 0 .75rem;
    padding: 0;
    display: grid;
    gap: .35rem;
}
.historico-series li {
    font-variant-numeric: tabular-nums;
    color: var(--ink);
    font-size: .95rem;
}
.historico-series .s-num {
    display: inline-block;
    min-width: 1.6rem;
    color: var(--muted);
    font-weight: 600;
    font-size: .82rem;
}
.historico-foot {
    margin: 0;
    color: var(--muted);
    font-size: .9rem;
}

/* Series editables */
.serie-row {
    display: grid;
    grid-template-columns: 2rem 1fr 1fr auto auto;
    gap: .55rem;
    align-items: end;
    margin-bottom: .85rem;
}
.serie-num {
    font-weight: 700;
    color: var(--muted);
    font-size: .85rem;
    padding-bottom: .7rem;
}
.campo-step label {
    display: flex;
    flex-direction: column;
    gap: .3rem;
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--muted);
}
.stepper {
    display: grid;
    grid-template-columns: var(--touch-lg) 1fr var(--touch-lg);
    gap: .4rem;
    align-items: stretch;
}
.stepper input {
    width: 100%;
    min-width: 0;
    text-align: center;
    font-variant-numeric: tabular-nums;
    font-weight: 600;
    padding: .65rem .25rem;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #fff;
    color: var(--ink);
    font-size: 1.1rem;
    min-height: var(--touch-lg);
}
.stepper button {
    min-width: var(--touch-lg);
    min-height: var(--touch-lg);
    padding: 0;
    background: #f5f4f1;
    border: 1px solid var(--line);
    color: var(--ink);
    font-size: 1.45rem;
    font-weight: 600;
    border-radius: 10px;
}
.stepper button:hover { background: var(--accent-soft); border-color: rgb(196 160 53 / 35%); }
.stepper button:active { background: var(--accent); color: #fff; border-color: var(--accent); }
.serie-hecho {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .35rem;
    font-size: .68rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--muted);
    padding-bottom: .15rem;
    min-height: var(--touch-lg);
    justify-content: flex-end;
}
.serie-hecho input {
    width: 28px;
    height: 28px;
    accent-color: var(--accent);
}
.btn-quitar-serie {
    min-width: var(--touch);
    min-height: var(--touch-lg);
    padding: 0;
    margin-bottom: .15rem;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: transparent;
    color: var(--muted);
    font-size: 1.45rem;
    line-height: 1;
    font-weight: 500;
}
.btn-quitar-serie:hover {
    color: var(--danger);
    border-color: #efc4c4;
    background: var(--danger-soft);
}
.btn-quitar-serie:active {
    background: var(--danger-soft);
    color: var(--danger);
}
.acciones-series {
    display: flex;
    flex-wrap: wrap;
    gap: .55rem;
    margin: 0 0 1rem;
}
.acciones-series .btn {
    flex: 1 1 calc(50% - .3rem);
    min-width: 8.5rem;
}

label.sensacion {
    display: flex;
    flex-direction: column;
    gap: .4rem;
    font-size: .82rem;
    font-weight: 600;
    color: var(--muted);
    margin-bottom: 1rem;
}
label.sensacion select,
input, select, textarea {
    font: inherit;
    color: var(--ink);
    padding: .7rem .8rem;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #fff;
    min-height: var(--touch);
}
label.sensacion select:focus,
input:focus, select:focus, textarea:focus {
    outline: none;
    box-shadow: var(--focus);
    border-color: var(--accent);
}
.acciones-form {
    display: flex;
    flex-wrap: wrap;
    gap: .55rem;
    margin-top: .25rem;
    align-items: stretch;
}
.acciones-form .btn,
.acciones-form button {
    flex: 1 1 auto;
}
.btn-block {
    width: 100%;
    min-height: var(--touch-lg);
    font-size: 1.05rem;
    padding: .85rem 1.1rem;
}
.link-atras {
    display: inline-block;
    margin-bottom: .65rem;
    color: var(--muted);
    text-decoration: none;
    font-weight: 600;
    font-size: .92rem;
}
.link-atras:hover { color: var(--accent); }

/* Rutina */
.rutinas-lista {
    display: grid;
    gap: .75rem;
}
.rutina-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
    flex-wrap: wrap;
    padding: .75rem 0;
    border-bottom: 1px solid var(--line);
}
.rutina-row:last-child { border-bottom: 0; padding-bottom: 0; }
.rutina-row:first-child { padding-top: 0; }
.rutina-row.activa {
    background: var(--accent-soft);
    margin: 0 -.55rem;
    padding: .75rem .7rem;
    border-radius: 8px;
    border-bottom: 0;
}
.rutina-row .meta {
    margin: .2rem 0 0;
    color: var(--muted);
    font-size: .88rem;
    display: flex;
    align-items: center;
    gap: .35rem;
    flex-wrap: wrap;
}
.seccion-cabecera {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: .75rem;
    flex-wrap: wrap;
    margin-bottom: .65rem;
}
.seccion-cabecera h2 { margin: 0; }
.rutina-dia,
.rutina-ej,
.form-editar-ej {
    scroll-margin-top: 1.25rem;
}
.rutina-dia h2 { margin-bottom: .65rem; }
.rutina-ej {
    display: grid;
    gap: .35rem;
    padding: .75rem 0;
    border-bottom: 1px solid var(--line);
    font-size: .95rem;
}
.rutina-ej:last-child { border-bottom: 0; }
.rutina-ej strong { font-weight: 600; }
.rutina-ej .meta { color: var(--muted); font-size: .88rem; }

/* Historial sesiones */
.sesion-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
    flex-wrap: wrap;
    padding: .85rem 0;
    border-bottom: 1px solid var(--line);
}
.sesion-row:last-child { border-bottom: 0; padding-bottom: 0; }
.sesion-row:first-of-type { padding-top: 0; }
.sesion-row.es-demo {
    background: #faf8f2;
    margin: 0 -.55rem;
    padding: .75rem .7rem;
    border-radius: 8px;
    border-bottom: 0;
}
.sesion-info {
    text-decoration: none;
    color: inherit;
    min-width: 0;
    flex: 1;
}
.sesion-info:hover strong { color: var(--accent); }
.sesion-info .meta {
    margin: .2rem 0 0;
    color: var(--muted);
    font-size: .88rem;
    display: flex;
    align-items: center;
    gap: .35rem;
    flex-wrap: wrap;
}
form.grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .85rem 1rem;
}
form.grid label {
    display: flex;
    flex-direction: column;
    gap: .35rem;
    font-size: .82rem;
    font-weight: 600;
    color: var(--muted);
}
form.grid label.full { grid-column: 1 / -1; }
.empty { color: var(--muted); padding: .5rem 0; }

/* Estadísticas */
.stats-resumen {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .75rem;
    margin-bottom: 1.15rem;
}
.stats-highlight {
    margin: 0 0 1.15rem;
    padding: .85rem 1rem;
    background: var(--accent-soft);
    border: 1px solid rgb(196 160 53 / 22%);
    border-radius: var(--radius);
    color: var(--ink);
    font-size: .95rem;
}
.stats-bars {
    display: grid;
    gap: .65rem;
}
.stats-bar-row {
    display: grid;
    grid-template-columns: 5.5rem 1fr auto;
    gap: .55rem;
    align-items: center;
}
.stats-bar-label {
    font-size: .78rem;
    font-weight: 600;
    color: var(--muted);
    font-variant-numeric: tabular-nums;
}
.stats-bar-track {
    height: 12px;
    background: #f0eee8;
    border-radius: 999px;
    overflow: hidden;
}
.stats-bar-track.mini {
    height: 8px;
    margin-top: .55rem;
}
.stats-bar-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 999px;
    min-width: 0;
    transition: width .35s ease;
}
.stats-bar-row.actual .stats-bar-fill {
    background: var(--accent-hover);
}
.stats-bar-track.up .stats-bar-fill { background: var(--accent); }
.stats-bar-track.down .stats-bar-fill { background: var(--warn); }
.stats-bar-track.flat .stats-bar-fill { background: #b8b0a4; }
.stats-bar-val {
    font-size: .82rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    color: var(--ink);
    white-space: nowrap;
}
.stats-ejercicios {
    display: grid;
    gap: 1rem;
}
.stats-ej {
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--line);
}
.stats-ej:last-child {
    border-bottom: 0;
    padding-bottom: 0;
}
.stats-ej-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: .75rem;
}
.stats-ej-top .meta {
    margin: .2rem 0 0;
    color: var(--muted);
    font-size: .88rem;
}
.stats-ej-nums {
    display: flex;
    flex-wrap: wrap;
    gap: .35rem .55rem;
    margin-top: .55rem;
    font-size: .88rem;
    color: var(--muted);
    font-variant-numeric: tabular-nums;
}

@media (min-width: 641px) {
    .stats-resumen {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    main {
        padding-top: 1.25rem;
        padding-bottom: calc(4rem + env(safe-area-inset-bottom, 0px));
    }
    .top {
        align-items: stretch;
        gap: .85rem;
        margin-bottom: 1.15rem;
    }
    .top-actions {
        width: 100%;
    }
    .top-actions .btn {
        flex: 1 1 calc(50% - .3rem);
        min-height: var(--touch-lg);
        font-size: 1rem;
    }
    .btn, button {
        min-height: var(--touch-lg);
        padding: .8rem 1.05rem;
        font-size: 1.02rem;
    }
    .acciones-form {
        width: 100%;
        gap: .65rem;
    }
    .acciones-form .btn,
    .acciones-form button,
    .acciones-form form {
        flex: 1 1 100%;
        width: 100%;
    }
    .acciones-form form .btn,
    .acciones-form form button {
        width: 100%;
    }
    .acciones-series .btn {
        flex: 1 1 100%;
    }
    .historial-item-acciones {
        flex-direction: column;
        align-items: stretch;
    }
    .historial-item-acciones .btn-danger,
    .historial-item-acciones form {
        width: 100%;
    }
    .historial-item-acciones form .btn {
        width: 100%;
    }
    .sesion-row {
        flex-direction: column;
        align-items: stretch;
        gap: .65rem;
        padding: 1rem 0;
    }
    .sesion-row .acciones-form {
        width: 100%;
    }
    .rutina-row {
        flex-direction: column;
        align-items: stretch;
    }
    .rutina-row .acciones-form {
        width: 100%;
    }
    .seccion-cabecera {
        flex-direction: column;
        align-items: stretch;
    }
    .seccion-cabecera .acciones-form {
        width: 100%;
    }
    .serie-row {
        grid-template-columns: 2.5rem minmax(0, 1fr);
        grid-template-areas:
            "num peso"
            ". reps"
            "hecho hecho";
        gap: .65rem .55rem;
        margin-bottom: 1.15rem;
        padding-bottom: 1rem;
        border-bottom: 1px solid var(--line);
    }
    #series-container.varias-series .serie-row {
        grid-template-columns: 2.5rem minmax(0, 1fr) var(--touch);
        grid-template-areas:
            "num peso peso"
            ". reps reps"
            "hecho hecho quitar";
    }
    .serie-row:last-of-type {
        border-bottom: 0;
        padding-bottom: 0;
    }
    .serie-num {
        grid-area: num;
        padding-bottom: 0;
        align-self: center;
        font-size: 1rem;
    }
    .campo-peso { grid-area: peso; }
    .campo-reps { grid-area: reps; }
    .serie-hecho {
        grid-area: hecho;
        flex-direction: row;
        justify-content: flex-start;
        align-items: center;
        gap: .65rem;
        min-height: var(--touch);
        font-size: .78rem;
        padding-bottom: 0;
    }
    .serie-hecho input {
        width: 26px;
        height: 26px;
    }
    .btn-quitar-serie {
        grid-area: quitar;
        align-self: center;
        justify-self: stretch;
        width: var(--touch);
        min-width: var(--touch);
        min-height: var(--touch);
        margin: 0;
    }
    form.grid { grid-template-columns: 1fr; }
    .link-atras {
        display: inline-flex;
        align-items: center;
        min-height: var(--touch);
        padding: .25rem 0;
        font-size: 1rem;
    }
    details summary {
        min-height: var(--touch);
        display: flex;
        align-items: center;
        -webkit-tap-highlight-color: transparent;
    }
}