* {
    box-sizing: border-box;
}

:root {
    --vino: #721c32;
    --vino-oscuro: #4b101f;
    --vino-claro: #9a3a54;
    --gris-050: #f7f7f8;
    --gris-100: #ececef;
    --gris-300: #c8c9ce;
    --gris-600: #62646b;
    --gris-850: #282a2f;
    --gris-950: #141518;
    --blanco: #ffffff;
    --metal: linear-gradient(135deg, #f9f9fa 0%, #bfc1c7 45%, #f4f4f5 72%, #9a9ca3 100%);
    --sombra: 0 24px 70px rgba(30, 8, 15, 0.18);
}

html,
body {
    margin: 0;
    min-height: 100%;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--gris-850);
    background:
        radial-gradient(circle at top right, rgba(114, 28, 50, 0.14), transparent 34%),
        linear-gradient(145deg, var(--gris-050), var(--gris-100));
}

body {
    min-height: 100vh;
}

.auth-page {
    display: grid;
    place-items: center;
    padding: 28px;
}

.auth-card {
    width: 100%;
    max-width: 470px;
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid var(--gris-300);
    border-radius: 22px;
    box-shadow: var(--sombra);
    overflow: hidden;
}

.metal-bar {
    height: 8px;
    background: var(--metal);
}

.auth-content {
    padding: 34px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 24px;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 52px;
    height: 52px;
    border-radius: 15px;
    color: var(--blanco);
    font-size: 22px;
    font-weight: 900;
    background:
        linear-gradient(145deg, var(--vino-claro), var(--vino-oscuro));
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.34),
        0 10px 25px rgba(114, 28, 50, 0.25);
}

.brand h1 {
    margin: 0;
    color: var(--vino-oscuro);
    font-size: 30px;
    letter-spacing: 0.2px;
}

.brand p {
    margin: 4px 0 0;
    color: var(--gris-600);
    line-height: 1.45;
}

label {
    display: block;
    margin: 16px 0 7px;
    font-weight: 700;
    color: var(--gris-850);
}

input {
    width: 100%;
    padding: 13px 14px;
    border: 1px solid var(--gris-300);
    border-radius: 11px;
    background: var(--blanco);
    color: var(--gris-950);
    font-size: 16px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus {
    border-color: var(--vino-claro);
    box-shadow: 0 0 0 4px rgba(114, 28, 50, 0.12);
}

button,
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    margin-top: 22px;
    padding: 14px 18px;
    border: 0;
    border-radius: 11px;
    color: var(--blanco);
    background:
        linear-gradient(145deg, var(--vino-claro), var(--vino-oscuro));
    font-size: 16px;
    font-weight: 800;
    text-decoration: none;
    cursor: pointer;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.25),
        0 12px 24px rgba(114, 28, 50, 0.22);
}

button:hover,
.btn:hover {
    filter: brightness(1.04);
}

.alerta {
    margin-bottom: 18px;
    padding: 14px 15px;
    border-radius: 11px;
    line-height: 1.45;
}

.alerta-error {
    border: 1px solid #d57b8f;
    color: #6b172b;
    background: #fff0f3;
}

.alerta-correcta {
    border: 1px solid #81b895;
    color: #215c35;
    background: #effaf2;
}

.panel-page {
    min-height: 100vh;
    padding: 28px;
}

.panel-shell {
    width: min(1120px, 100%);
    margin: 0 auto;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 20px 24px;
    color: var(--blanco);
    border-radius: 18px;
    background:
        linear-gradient(135deg, var(--vino-oscuro), var(--vino));
    box-shadow: var(--sombra);
}

.topbar h1 {
    margin: 0;
    font-size: 25px;
}

.topbar p {
    margin: 5px 0 0;
    color: #f2dfe4;
}

.logout-link {
    color: var(--blanco);
    font-weight: 700;
    text-decoration: none;
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin-top: 22px;
}

.card {
    padding: 24px;
    border: 1px solid var(--gris-300);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 14px 36px rgba(40, 42, 47, 0.08);
}

.card h2 {
    margin: 0 0 9px;
    color: var(--vino-oscuro);
    font-size: 20px;
}

.card p {
    margin: 0;
    color: var(--gris-600);
    line-height: 1.55;
}

@media (max-width: 760px) {
    .grid {
        grid-template-columns: 1fr;
    }

    .topbar {
        align-items: flex-start;
        flex-direction: column;
    }

    .auth-content {
        padding: 26px;
    }
}